Shanghai Chenzhu Instrument Co., Ltd.

Signal Conditioner(2024年02月26日)

chenzhuisolator — 2024-02-26T15:29:02+0900

https://www.chenzhuisolator.com/products/signal-conditioner/

Universal signal conditioner is used in industrial process control systems. Isolated signal conditioner connects industrial field instruments and control systems to complete the function of signal matching and conversion. Through reliable isolation technology, the signal conditioning equipment resists various interference attacks and ensures the stability of the system and instruments in a complex electromagnetic environment. The isolated pt 100 signal conditioner of Chenzhu using special design achieves anti-interference among power supply, input, and output. At the same time, the signal conditioning module/unit has a strong EMC performance that can work normally even under strong interference.

So far, our signal conditioning isolation amplifier for electronics, as a member of the whole safety automation system, has been applied to tens of thousands of industrial sites. And the stability of the control system escort, possessing the most complete models, has reached the international level. As one of the most professional signal isolator suppliers, Chenzhu promises to provide you good transducer signal conditioning and services! Different types of signal conditioners for circuits can be offered by us, whether it's based on RTD loop powered digital isolator or DC Pt100 signal splitter, Pt100 signal conditioner with 4-20mA output current. If you want to know the price of our 5v to 24v PLC signal converter, please contact us as soon as possible. Related sensors and signal conditioning pdf files are also available for you to refer to.

What is the difference between 2-wire transmitter, 3-wire transmitter and 4-wire transmitter?
 2-wire transmitter
 3-wire transmitter
 4-wire transmitter
Four-wire transmitters have their own internal power supply, and they do not need to be connected to a DC power supply. It has two power cords and two current output lines. The output of a 4-wire transmitter is usually a current signal.

FAQ of Signal Isolators
Q
How to distinguish between the active and passive signals?
A
According to whether the signal acquisition loop needs an external power supply,

Active signal：In the 4~20mA signal acquisition loop, the signal generating end has its own voltage drive and no external power supply equipment is needed. This 4~20mA is an active signal. Generally, 4-wire transmitter and 3-wire transmitter output active signals.

Passive signal：In the 4~20mA signal acquisition loop, the signal generating end does not have its own voltage drive and external power supply equipment is needed. This 4~20mA is a passive signal. Generally, a 2 wire temperature transmitter outputs passive signals.

Method of judging whether the external power supply is needed in the signal acquisition loop：

Disconnect the signal acquisition loop, and connect a voltmeter to the two lines of the field device (voltage transmitter). If there is voltage, it means the field device outputs active signals. If there is no voltage, it means the field device outputs passive signals.

Q
Temperature Input Signal Type and Range

Safety Relay(2024年02月26日)

chenzhuisolator — 2024-02-26T15:28:17+0900

https://www.chenzhuisolator.com/products/safety-relay/

Automation automation direct safety relays are mainly applied to the safety control circuit, connecting the safety sensing elements and mechanical equipment motion controller. The working principle of safety rated relay: when there is a fault in the safety circuit, the intrinsically safe barrier relay automatically detects the fault and stops the machine movement, to protect equipment and personnel safety.

Chenzhu solid state safety relay is the first product to get PLe/Cat.4, SIL3 certified in China mainland. Automation and safety is the main character of the programmable safety relay module that you can be assured.

Various safety relay products are available for you to select. We have safety relay for E-stop buttons, emergency stop buttons, two-hand control buttons. We also provide light curtain safety relay, sil 2 and sil 3 rated relays to better meet the needs of our customers. For more information, please feel free to contact us.

FAQ of Chenzhu Safety Relay
Q
What is safety relay?
A
Safety relay offer an extra level of protection usually through a redundant wiring system.

These relays are used to enable an monitor the signals between other safety devices such as safety switched sensors, light curtains, intrinsic safety barriers and isolators. In many cases, the safety relay can be paired with a safety PLC configurable safety relay or safety controller.

Q
What is the difference between safety relay and normal relay?
Q
How does an intrinsic safety barrier work?
Q
How do safety relays improve safety?
Q
What are the main applications of safety relays?
Q
What's the line monitoring function of Safety Relay?

Safety Mat Safety Relay(2024年02月26日)

chenzhuisolator — 2024-02-26T15:27:36+0900

https://www.chenzhuisolator.com/products/safety-mat-safety-relay.html

Safety Mat Relay
Safety relay modules provide a high level of fail-safe operation for critical processes and protection. This safety mat and multi-function controllers safety relay offer 2 or 4-wire safety mats/edges. Automatic reset and monitored manual reset are available.

The programmable safety relays support 3 safety output contacts (N/O) and 1 auxiliary output contacts (N/C) or 2NO+1NC+1SO or 2NO(t)+1NC(t).

Features & Advantages of Chenzhu Safety Mat Safety Relay

2-wire safety mats/edge

4-wire safety mats/edge

Automatic reset

Monitored manual reset

Parameter of Safety Mat Safety Relay
CZSR8301-3A1BCZSR8301-3A1B(M)CZSR8302-3A1BCZSR8303-3A1B
Supply voltage24V DC/AC24V DC/AC24V DC/AC100V~230V AC
Voltage tolerance0.85~1.10.85~1.10.85~1.1-
Current consumption≤90mA (24V DC) / ≤240mA (24V AC)≤90mA (24V DC) / ≤240mA (24V AC)≤90mA (24V DC) / ≤240mA (24V AC)≤7 VA (220V AC)
Input current≤50mA (24V DC)≤50mA (24V DC)≤10mA (24V DC)≤10mA (220V AC)
Cable resistance≤15Ω≤15Ω≤15Ω≤15Ω
Input devicesSafety mats (4-wire)Safety mats (4-wire)Safety mats (4-wire)Safety mats, safety edges (2 or 4-wire)
Number of contacts3NO+1NC3NO+1NC3NO+1NC1.0KΩ ~ 10KΩ
Contact materialAgSnO2 + 0.2 µm AuAgSnO2 + 0.2 µm AuAgSnO2 + 0.2 µm AuAgSnO2 + 0.2 µm Au
External contact fuse protection10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)
Mechanical endurance of contacts≥107≥107≥107≥107
Utilisation categoryIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24VIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24VIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24VIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24V
Switch-on delay≤300ms≤150ms≤300ms≤300ms
Delay-on de-energisation≤30ms≤30ms≤30ms≤30ms
Recovery time≤300ms≤300ms≤100ms≤500ms
Supply short interruption20ms20ms20ms20ms
EMCEN60947, EN61000-6-2, EN61000-6-4EN60947, EN61000-6-2, EN61000-6-4EN60947, EN61000-6-2, EN61000-6-4EN60947, EN61000-6-2, EN61000-6-4
VibrationVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mmVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mmVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mmVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mm
Ambient temperature-20℃~+60℃-20℃~+60℃-20℃~+60℃-20℃~+60℃
Storage temperature-40℃~+85℃-40℃~+85℃-40℃~+85℃-40℃~+85℃
Relative humidity10%~90%10%~90%10%~90%10%~90%
Elevation≤2000m≤2000m≤2000m≤2000m
Overvoltage categoryⅢⅢⅢⅢ
Pollution degree2222
Rated insulation voltage250V AC250V AC250V AC250V AC
Rated impulse voltage6000V (1.2/50us)6000V (1.2/50us)6000V (1.2/50us)6000V (1.2/50us)
Dielectric strength1500V AC, 1min1500V AC, 1min1500V AC, 1min1500V AC, 1min
Clearance and creepage distanceIn accordance with EN 60947-1In accordance with EN 60947-1In accordance with EN 60947-1In accordance with EN 60947-1
Safety integrity levelSIL3SIL3SIL3SIL3
Performance levelPLePLePLePLe
CategoryCat.4Cat.4Cat.4Cat.4

CZSR8302-2A1B1SCZSR8302-2AT1BT1S
Supply voltage24V DC/AC24V DC/AC
Voltage tolerance0.85~1.10.85~1.1
Current consumption≤120mA (24V DC), ≤300mA (24V AC)≤120mA (24V DC), ≤300mA (24V AC)
Input current≤10mA (24V DC)≤10mA (24V DC)
Cable resistance≤15Ω≤15Ω
Input devicesSafety mats, safety edges (2 or 4-wire)Safety switches, Contact switches
Terminal resistance1.0KΩ ~ 10KΩ1.0KΩ ~ 10KΩ
Number of contacts2NO+1NC+1SO2NO(t)+1NC(t)
Contact materialAgSnO2 + 0.2 µm AuAgSnO2 + 0.2 µm Au
External contact fuse protection10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)
Mechanical endurance of contacts≥107≥107
Utilisation categoryIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24VIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24V
Semiconductor output dataNumber of semi-output：1SO
Driving ability：20mA/24V DCNumber of semi-output：1SO
Driving ability：20mA/24V DC
Switch-on delay≤300ms≤300ms
Delay-on de-energisation≤30ms(instantaneous)≤30ms (instantaneous)
0s, 0.5s, 1s, 2s, 3s, 5s(Deleted factory set as 5s)
Recovery time≤100ms≤100ms
Supply short interruption20ms20ms
EMCEN60947, EN61000-6-2, EN61000-6-4EN60947, EN61000-6-2, EN61000-6-4
VibrationVibration frequency: 10Hz～55Hz;
Vibration amplitude: 0.35mmVibration frequency: 10Hz～55Hz;
Vibration amplitude: 0.35mm
Ambient temperature-20℃~+60℃-20℃~+60℃
Storage temperature-40℃~+85℃-40℃~+85℃
Relative humidity10%~90%10%~90%
Elevation≤2000m≤2000m
Overvoltage categoryⅢⅢ
Pollution degree22
Rated insulation voltage250V AC250V AC
Rated impulse voltage6000V (1.2/50us)6000V (1.2/50us)
Dielectric strength1500V AC, 1min1500V AC, 1min
Clearance and creepage distanceIn accordance with EN 60947-1In accordance with EN 60947-1
Safety integrity levelSIL3SIL3
Performance levelPLePLe
CategoryCat.4Cat.4

CHENZHU strives to provide high-quality products and services to meet the expectations of our customers and interested parties by delivering outstanding performance. We have special talents to research and develop automation safety system. Indeed, automation and safety are our interface products' main characters.

Power Transmitter(2024年02月26日)

chenzhuisolator — 2024-02-26T15:26:59+0900

https://www.chenzhuisolator.com/products/power-transmitter/

Power transmitter can transfer complicated current like 0~1A/0~5A/0~10A into industry-standard output, adopting the true RMS detection technology. We offer DC supply (True RMS) or AC supply for your choice.

Voltage transmitter can be used in the detection of the non-sinusoidal current signal, such as switching mode power supply, thyristor output current, etc. The carrier current transmitter needs an independent 24V power supply. Input, output, and power supply are each galvanically isolated. Dielectric strength between input side and power, the output is 4kV. The low or high power transmitter adopts DIN35mm rail mounting, compact and convenient for installation on site. All in all, the transmitter has the good character of automation and safety, just like other interface products created by Chenzhu.

FAQ of Power Transmitter
Q
What is a power transmitter?
A
A power transmitter is a measuring instrument that converts the measured power( AC voltage, AC current, reactive power, reactive energy, frequency, phase, power factor, DC voltage, DC current, etc.) into a linear proportional DC current or voltage output( electrical pulse output). It is widely used in electric power, petroleum, coal, metallurgy, railways and other departments of electrical measurement, automatic control and scheduling systems.

CHENZHU strives to provide high-quality products and services to meet the expectations of our customers and interested parties by delivering outstanding performance. We have special talents to research and develop automation and safety system. Indeed, automation and safety are our interface products' main characters.

Photovoltaic 1000 DC Power SPD(2024年02月26日)

chenzhuisolator — 2024-02-26T15:26:13+0900

https://www.chenzhuisolator.com/products/photovoltaic-1000-dc-power-spd.html

SPD for DC power, SPD 1000VDC; In(8/20us): 20kA/phase, Imax: 40kA/phase; hot-pluggable; fault indication;

Features & Advantages of Photovoltaic DC SPD 1000
Status indication:

Green: OK

Red: Failed

DC power surge protector modules can be replaced online.

Remote alarm output is optional, named with "F".

It is normally installed at the boundary of LPZ1 and LPZ2 or subsequent LPZs.

Parameter of 1000 DC Power Photovoltaic SPD
T2-1000
T2-1000F
Max. continuous operating voltage Ucpv1000VDC
Short-circuit current rating Iscpv1000A
Nominal discharge current In(8/20µs)20kA
Max. discharge current Imax(8/20µs)40kA
Voltage protection level Up4kV
Recommended backup fuse80A gG
Recommended grounding cable6~35mm2
Response time25ns
Residual current IPE<10μA
Remote alarm output250VAC/0.5A;24VDC/0.5A
Housing protection grade(IEC60529)IP 20
Housing material/inflammability rating(UL94)PA66/V0
Testing standardIEC 61643-31

CHENZHU strives to provide high-quality products and services to meet the expectations of our customers and interested parties by delivering outstanding performance. We have special talents to research and develop safety and automation system. Indeed, automation and safety are our interface products' main characters.

C Series Ultra Thin Signal SPD(2024年02月26日)

chenzhuisolator — 2024-02-26T15:25:31+0900

https://www.chenzhuisolator.com/products/c-series-ultra-thin-signal-spd/

In today's fast-paced world of information technology, electronic devices are being used in increasingly diverse applications. However, their lower operating voltage and reduced surge tolerance make them particularly sensitive to transient overvoltage in system signals. This is especially true in the field of automation, which involves a large amount of signal transmission, requiring the installation of numerous surge protective devices for transient overvoltage protection.

While ensuring the surge protection performance of SPDs is critical, their size is also becoming increasingly important. The more SPDs that can be installed in a single control cabinet, the fewer cabinets are needed, resulting in lower overall costs.

Signal SPD protects signal devices (e.g. PLC, DCS, SCADA, transmitter, flow meter, solenoid valve) from lightning, which is applied to signals such as AI/ AO/ DI/ DO, RS485/ RS232/ RS422, RTD and TC etc..

Intrinsic Safety Signal SPD-3.5 mm Width

C Series Ultra Thin Signal SPD Network Relys on safety technical standards
Large discharge capacity, Nominal discharge current of In10kA. It has multiple authoritative certifications, including type tests and SIL3 certification.

Compact size, saves valuable space and is the thinnest SPD available at just 3.5mm

Customizable identification label for easy identification

Convenient installation, push-in or screw connection

Can be selected to protect RS-232, RS-485, RTD, TC, AI, AO, DI, DO, and other signal interfaces.

FAQ of C Series Ultra Thin Signal SPD
Q
What is the function of an SPD?
A
When lightning strikes, high-power equipment starts and stops, or electrostatic discharge occurs, transient overvoltage (surge) is generated, causing equipment damage. SPD (Surge Protective Device) is the abbreviation for surge protection device. SPD is installed at the front end of the equipment being protected. When a surge occurs, the SPD can quickly conduct electricity and discharge the surge to the ground, limiting the voltage to a safe level, thereby protecting the equipment at the back end.

Q
Should SPD be installed?

Established in 2002, CHENZHU has developed as a manufacturing center that is able to manufacture 4 main categories of the product (Isolated Barrier, Signal Conditioner, Surge Protective Device, Safety Relay) with 18 ranges of series. In all, we have more than 500 plus models and more than 2000 specifications that can be configured to fit your needs.

Light Curtain Safety Relay(2024年02月26日)

chenzhuisolator — 2024-02-26T15:25:02+0900

https://www.chenzhuisolator.com/products/light-curtain-safety-relay.html

Light curtain Safety Relay supports PNP-type light beam devices. Safety relay modules provide a high level of fail-safe operation for critical processes and protection. These light curtains and multifunction controllers provide multiple functions such as release delay, muting, stepping, and protection for multiple curtains.

Safety rated relays can choose single or dual channel operation, manual or automatic reset, with function of short circuit monitoring between channels.

Features & Advantages of Light Curtain Safety Relay
Support PNP type light beam device

Support dual channel

Support manual or automatic reset

Parameter of Light Curtain Safety Relay
CZSR8001-3A1B-PCZSR8101-3A1B-N
Supply voltage24V DC24V DC
Voltage tolerance0.85~1.10.85~1.1
Current consumption≤90mA (24V DC)≤90mA (24V DC)
Input current≤50mA (24V DC)≤50mA (24V DC)
Cable resistance≤15Ω≤15Ω
Input devicesPNP type light beam devicesNPN type light beam devices
Number of contacts3NO+1NC3NO+1NC
Contact materialAgSnO2 + 0.2 µm AuAgSnO2+ 0.2 µm Au
External contact fuse protection10A gL/gG NEOZED (NO) ;
6A gL/gG NEOZED (NC)10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)
Mechanical endurance of contacts≥107≥107
Utilization categoryIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24VIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24V
Switch-on delay≤300ms≤300ms
Delay-on de-energisation≤30ms≤30ms
Recovery time≤100ms≤100ms
Supply short interruption20ms20ms
EMCEN60947, EN61000-6-2, EN61000-6-4EN60947, EN61000-6-2, EN61000-6-4
VibrationVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mmVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mm
Ambient temperature-20℃~+60℃-20℃~+60℃
Storage temperature-40℃~+85℃-40℃~+85℃
Relative humidity10%~90%10%~90%
Elevation≤2000m≤2000m
Overvoltage categoryⅢⅢ
Pollution degree22
Rated insulation voltage250V AC250V AC
Rated impulse voltage6000V (1.2/50us)6000V (1.2/50us)
Dielectric strength1500V AC, 1min1500V AC, 1min
Clearance and creepage distanceIn accordance with EN 60947-1In accordance with EN 60947-1
Safety integrity levelSIL3SIL3
Performance levelPLePLe
CategoryCat.4Cat.4

CHENZHU continuously improves its technology based on the experience and knowledge from different application requirements. Since 2002, more than several million sets of CHENZHU products have been sold all over the country, providing the safest protection for all industries.

If you want to know more kinds of safety automation system, please visit our website.

Details to Pay Attention to in Signal Isolators(2023年)

chenzhuisolator — 2023-02-20T11:22:28+0900

https://www.chenzhuisolator.com/details-to-pay-attention-to-in-the-signal-isolator.html

What Is Signal Isolator?

Ⅰ. Introduction of signal isolators
Signal isolator adopts a linear optocoupler isolation principle that converts input signals into output signals. Input, output and working power sources are isolated from each other, which is especially suitable for equipment and instruments that need electrical isolation. Signal isolator, also known as isolator, is an important part of industrial control system. In addition to the functional aspects of signal isolator, we also need to pay attention to a few details.

Ⅱ. Details to pay attention to in signal isolators
1. Signal isolator's supply voltage:

As for products such as signal converter, we generally choose the working voltage of the power supply which is 20~35VDC, so that we can use the power transformer in the control box to ensure a stable power supply. In addition, signal isolator uses screws to tighten the connection to ensure the credibility of the power supply connection.

2. Signal isolator's internal temperature raising:

One of the key functions of signal isolator by CHENZHU, a reputable company specializing in automation and safety, is to steadily optimize software electromagnetic interference problems. In order to ensure long-term and stable operation, it is important to consider whether signal isolator can be reliable for a long time. People will generally choose load allocation, ultra-low temperature power consumption and technical products.

3. The self-protection ability of signal isolator:

Apart from suppressing the electromagnetic interference in the data signal loop in analog signal isolator, the anti-interference of signal isolator itself must also be taken into account. If isolator itself can not work normally under electromagnetic interference, how can it have a good impact on the circuit? Therefore, signal isolator has EMC maintenance components such as signal surge, static induction, transmission in the port.

4. The warranty period of signal isolator:

Warranty period is the quality assurance of the products and also reflects the service ability of the manufacturer.

The signal isolator of CHENZHU adopts three-terminal isolation technology of power, input and output to break the interference ground loop and eliminate the interference signal to form a grounding loop through the IO card, so as to ensure the purity and stability of the control signal. At the same time, signal isolator itself has a strong filtering function, in case of strong interference, restrain the propagation of the interference signal and ensure the stability of the signal, supporting 5-year warranty.

If you want to know more details of signal isolator function, please contact us.

Conceptual Difference Between Temperature Transmitter and Temperature Sensor(2023年)

chenzhuisolator — 2023-02-20T11:21:41+0900

https://www.chenzhuisolator.com/conceptual-difference-between-temperature-transmitter-and-temperature-sensor.html

1. Introduction of differential temperature transmitter and temperature sensor
The temperature sensor is a general term for devices that can sense a prescribed measurement and convert it into a usable output signal according to a certain rule. When the output of the sensor is a specified standard signal, it is called a temperature transmitter.

Temperature transmitter (or intrinsically safe thermocouple transmitter) is an instrument that converts non-standard electrical signals into standard electrical signals, while sensors are devices that convert physical signals into electrical signals. In the past, physical signals were often used, but now other signals are also available. The primary instrument refers to the field measuring instrument or the base control meter, and the secondary instrument refers to the instrument that uses the primary meter signal to complete other functions, such as control, display and other functions.

2. Conceptual difference between temperature transmitter and temperature sensor

The temperature sensor converts non-electrical physical quantities such as temperature, pressure, liquid level, material, gas characteristics into electrical signals or sends physical quantities such as pressure, liquid level directly to a head mounted or din rail mounted temperature transmitter.

The temperature transmitter is a signal source that amplifies the weak electrical signal collected by the sensor to transfer or start the control element, or converts the non-electricity input from the sensor into an electrical signal and amplifies it for remote measurement and control. The temperature transmitter by CHENZHU, a reliable company in safety and automation system, can also transform the analog quantity into the digital quantity according to the need. The temperature sensor and temperature transmitter together constitute a monitoring signal source for automatic control. Different physical quantities require different temperature sensors and corresponding temperature transmitters.

There is also a temperature transmitter that does not convert physical quantities into electrical signals, such as a "differential pressure transmitter" of a boiler water level gauge, which sends the lower water and upper steam condensate in the liquid level sensor to the instrument pipe on both sides of the bellows of the temperature transmitter, and the mechanical amplifying device is driven by the differential pressure on both sides of the bellows to indicate the water level with a pointer.

A Brief Introduction of Intrinsically Safe Barrier(2023年)

chenzhuisolator — 2023-02-20T11:20:55+0900

https://www.chenzhuisolator.com/a-brief-introduction-of-intrinsically-safe-barrier.html

Intrinsically safety barriers in instrumentation improves workplace safety by limiting the energy available in the process.

Ⅰ. What is intrinsically safe barrier?
Intrinsic safety barrier is the related equipment of explosion-proof instruments and meters, which does not affect the function of the measurement system under normal conditions. It is set on one side of the safe place, and when the intrinsic safe explosion-proof system fails, it can limit the energy (electric energy) entering the dangerous place to the safe value, so as to ensure the safety of the site.

Ⅱ. Types of intrinsically safe barriers
Intrinsically safe barrier is divided into two types: zener diode safety barrier and isolated safety barrier.

1. Zener diode safety barrier

Quick-acting fuse, current limiting resistance or voltage limiting diodes are used in the zener diode safety barrier to limit the input electric energy, so as to ensure the energy output to the dangerous area. Its principle is simple, the circuit is easy to realize, and the price is low, but its reliability in application is greatly affected because of the defect of its own principle, and its application scope is limited.

2. Isolated safety barrier

It adopts a circuit structure that electrically isolates the input, output and power supply from each other, and meets the energy limitation requirements of intrinsic digital input barrier. Compared with Zener security, although it is more expensive, its outstanding advantages in performance bring greater benefits to user applications:

(1) Due to the use of three-party isolation mode, there is no need for system grounding lines, which brings great convenience to the design and on-site construction.

(2) The requirements for instruments in the dangerous area are greatly reduced, and there is no need to use isolated instruments on the spot.

(3) Because the signal circuit does not need to use the common ground, the stability and anti-interference ability of the detection and control loop signal are greatly enhanced, thus the reliability of the whole system is improved.

(4) Isolated safety barrier has stronger input signal processing ability, and can accept and process thermocouple, thermal resistance, frequency and other signals, which zener diode safety barrier can not do.

(5) Isolated safety barrier by CHENZHU, a professional company specializing in safety automation system can output two mutually isolated signals for use by two devices using the same signal source, and ensure that the signals of the two devices do not interfere with each other, and at the same time improve the electrical safety and insulation performance of the connected devices.

Therefore, after comparing the characteristics and performance of zener and isolated safety barrier, we can see that isolated safety barrier has outstanding advantages and more extensive uses. Although its price is slightly higher than that of zener diode safety barrier, its comprehensive cost may be lower than that of zener diode safety barrier in terms of design, construction, installation, debugging and maintenance costs. Almost without exception, isolated safety barrier is used as the main intrinsic safe explosion-proof instrument in the engineering site with higher requirements. Isolated safety barrier has gradually replaced zener diode safety barrier, and has been widely used in the field of safety and explosion protection.

If you want to know more about how does an intrinsically safe barrier work, please visit our website.

Quality Control(2023年)

chenzhuisolator — 2023-02-20T11:19:45+0900

https://www.chenzhuisolator.com/quality-control1/

CHENZHU is a ISO 9001:2015 certified company who produces safety automation system. In our production department, process quality checks are comprehensive work at every stage of production and are documented. Quality control shanghai is strictly monitored from material to final products. We ensure that our customers receive the best quality products at the lowest price.

Quality Concept
Quality is our eternal commitment to our customers. Quality control is written into every step of CHENZHU's automation safety production processes, from design to produceing, from manufacture to staff traning.

Raw Material Inspection
For detailed raw material inspection and selection, we have the most modern quality assurance factory, like isolated barriers and signal conditioning isolation factory ,accessories from well-known brands.

Quality Assurance System
Every CHENZHU's proudct such as thermometer transmitter is made strictly followed PDCA cycle, use quality assurance to ensure that products are designed and produced with the correct procedures. This helps reduce problems and errors in the final product.

Quality Control System
Chenzhu has a sound quality control system, strict implementation of the entire stage of order delivery, from feed inspection, manufacturing process inspection to finished product inspection. Every production process can be recorded and tracked by code.

Quality Control team
With decades years of manugacturing experience and strict adherence to the highest quality standards, CHENZHU, a professional SPD company, sets up quality control department. Leading by the chief engineer, testing department(laboratory) as supervisor, responsible for plan, establish and improve the quality management system and services.

International Standard
Despite internal quality control from production to inspection, we also work with international independent testing agencies to conduct testing, like IECEx, TUV Rheinland, NEPSI. Aim to make our products reliable and better.

The Working Principle and Classification of Surge Protector(2023年)

chenzhuisolator — 2023-02-20T11:19:03+0900

https://www.chenzhuisolator.com/the-working-principle-and-classification-of-surge-protector.html

Ⅰ. The surge protection device working principle
Surge protection device is an indispensable device in lightning protection of electronic equipment. In the past, it was often called "lighting protector" or "over-voltage protector", abbreviated as SPD. The function of surge protection device is to limit the instantaneous over-voltage of the power line and signal transmission line to the voltage range that the equipment or system can withstand, or to drain the powerful lightning into the ground to protect the equipment or system from being damaged by impact.

The type and structure of surge protection device by CHENZHU, a reliable company specializing in safety and automation system vary for different purposes, but it should contain at least one nonlinear voltage limiting element.

Ⅱ. Types of surge protection device
Surge protection device is classified according to its working principle:

1. The working principle of switch type AC or DC surge protection device is that it appears as high impedance when there is no instantaneous over-voltage, but once it responds to lightning instantaneous over-voltage, it suddenly changes to low impedance and allows lightning current to pass through.

2. The working principle of voltage-limiting surge protection device is that it has high resistance when there is no instantaneous over-voltage, but its impedance decreases with the increase of surge current and voltage, and its current-voltage characteristics are strongly nonlinear.

3. Shunt type or choke type surge protection device is the third type SPD surge protection device. Shunt type has parallel connection with the protected equipment, showing low impedance for lightning pulses and high impedance for normal operating frequency. The choke type is in series with the protected equipment, showing high impedance for lightning pulses and low impedance for normal operating frequency.

The categories of surge protection device by use are:

1. Power protection device: AC power surge protection device, DC power protection device, switch type power protection device and so on.

2. Signal surge protection device: low frequency signal protection device, high frequency signal protection device, antenna surge protector and so on.

The Principle and Classification of Safety Barriers(2023年)

chenzhuisolator — 2023-02-20T11:18:21+0900

https://www.chenzhuisolator.com/the-principle-and-classification-of-safety-barriers.html

1. What is an intrinsic safety barrier instrument?
China safety barrier is generally used in intrinsic safety systems. Intrinsic safety refers to system explosion-proof technology, which refers to the function of making production equipment or production system itself safe through design and other means, and will not cause accidents even in the case of misoperation or failure. The safety barrier is a commonly used associated equipment in intrinsic safety explosion-proof systems. The safety barrier (such as GS8500-EX and GS8597-EX.3 safety barrier from Chenzhu )is a circuit between the field equipment and the control room that limits energy.

2. The basic function of intrinsic safety barrier
To enable intrinsic safety equipment in hazardous locations to work normally, and to limit the electrical energy supplied to field instruments from the control room to a range that can neither generate sparks which are sufficient to detonate dangerous gases nor enable instrument surface temperature to be high enough to detonate dangerous gases.

As long as the current-limiting and voltage-limiting circuit of the intrinsic barrier is working properly, it will not generate any sparks or cause surface temperature to be high enough to ignite an explosive environment. Therefore, whether the control room equipment in the safe place or the intrinsic safety equipment in the dangerous place fails, the entire system will be in an essentially safe state on the circuit and will not cause an explosion.

Since the intrinsic safety barrier is designed as an energy-limiting interface between the field equipment and the control room equipment, no matter whether the control room equipment is in a normal or faulty state, the safety barrier can ensure that the energy transmitted to the field equipment through it is intrinsically safe.

3. Classification of intrinsic safety barriers
Intrinsic safety barrier, as the associated equipment between the non-intrinsic safety equipment in the control room and the intrinsic safety equipment in hazardous locations, is an important part of the intrinsic safety explosion-proof system. According to the structure, it is divided into two types: Zener safety barrier and isolation safety barrier.

(1) Zener safety barrier. In the circuit, the fast fuses, current limiting resistors and parallel voltage limiting Zener diodes are connected in series to realize the energy limitation, and to ensure that the energy is safely limited when the signals of instrument in dangerous area and the instrument in safe area are connected. It uses very few components, with advantages of small size, and low price, but there are also some fatal flaws, which greatly restrict its scope of application.

(2) Isolated barrier. A circuit structure that electrically isolates the input, output, and power supply from each other is adopted. Like digital input barrier, it has both the energy limiting function and the isolation function, and at the same time it meets the requirements of intrinsic safety energy limiting. Isolated intrinsic barriers are mainly composed of loop energy limiting units, signal and power isolation units, and signal processing units. Its outstanding performance advantages have brought great benefits to users in applications.

Isolated barriers have outstanding advantages and a wider range of uses. Although the price is slightly higher than the Zener safety barrier, considering the design, construction, installation, commissioning and maintenance costs, the overall cost may be lower than that of the Zener safety barrier.

If you want to know more about intrinsic safe barrier how it works, please visit our website.

Safety Relay Working Principle(2023年)

chenzhuisolator — 2023-02-20T11:17:41+0900

https://www.chenzhuisolator.com/safety-relay-working-principle.html

1. Introduction of automation safety relay
A safety relay is an electrical component used in daily life for safety to prevent electric shocks and to prevent equipment from overheating. As the name implies, it is a relay that can make regular actions in the event of a safety accident. The safety relay is a combination of several relays and circuits, in order to complement each other's abnormal defects and achieve the complete function of the relay with low malfunction actions. The lower the error and failure value are, the higher the safety factor will be.

2.Working principle of a relay
3.Do you know how does a safety relay work? The safety relay interlock system has a forcibly guided contact structure, which is a necessary control part in a safety circuit. It accepts safety inputs, and deterministically outputs the switch signal to the control circuit of the device through the judgment of the internal circuit. Simply put, the safety relays are all dual-channel signal types.

Only when the signals of both channels are normal, the safety relay in a safety and automation system can work normally; in the working process, as long as the signal of any one of the channels is disconnected, the safety relay will stop outputting. It will not work until the signals of both channels are normal and reset. Although it is not just relying on dualization alone, dualization is necessary as well.

Mutual inspection of dual circuits is to confirm that all safety circuits have been disconnected once, and if necessary, the operator can start the operation and other conditions. From another point of view, when the input switch wiring is short-circuited or the wire sheath is damaged and the grounding happens, it is necessary to prevent the sudden start of the machine caused by that. In fact, in order to facilitate the construction of the safety circuit, the safety relay is combined with other components, and the basic emergency stop circuit and the safety circuit constitute a circuit module product called the safety relay module.

CHENZHU manufactures the most reliable interface product for safety automation system. We are here to help your device run more safely. Here you can not only get world-class products, but also outstanding service for safety and automation system.

Signal SPD(2023年)

chenzhuisolator — 2023-02-20T11:16:42+0900

https://www.chenzhuisolator.com/products/signal-spd/

Electronic devices are always threatened by power surges and transients caused by power failures or nearby lightning strikes.

Signal SPD surge protection device is born to protect electronic devices in automatic control systems.

The SPD surge protection device can provide surge protection for field equipments such as sensors, transmitters, flow meters, solenoid valves, thermocouples, thermal resistance, devices with RS485 or RS232 interface and for I/O interfaces such as Al, AO, Dl, DO, Tl, Pl in PLC, DCS, FGS, ESD control systems.

Signal data surge protector is widely used in petrochemical, gas, environmental protection and new energy industries.

Chenzhu also provides signal arrester equipment in intrinsical safety circuits that meet the same design and structural standards as intrinsic safety equipment, which requires certification and approval of them.
Intrinsic Safety 5V Signal SPD
Intrinsic Safety 24V Signal SPD
Signal SPD For 5V
Signal SPD For 24V

FAQ of Signal SPD
How do I choose a signal SPD?-
CHENZHU SPD for signal is mounted by DIN rail. It can be selected from informations below.

1. Type of the signal

According to the signal type, we can get the information of the signal voltage, so as to determine Uc.

For example, normally,

AI，AO： 24V，

DI，DO： 24V，

RS485， TC：5V，

RS232：12V

RTD：5V.

2. Rated current IL

Since SPD for signal is normally installed in range, operating current will go through SPD. If operating current is bigger than IL of SPD, SPD will be damaged. Normally IL will be big enough. For 3-wire, 4-wire carrier current transmitters and DO signals which have higher power consumption, IL need to be checked.

3. Number of wires to be protected

Select 2 wires, 3 wires, 4 wires accordingly.

4. Is intrinsically safe explosion-proof required?

Yes——select intrinsically safe SPD;

No——select non intrinsic safety SPD.

How to judge if SPD is functional?-
SPD protected the devices by discharging current to the ground. One-time strike will not damage SPD unless SPD is chosen incorrectly.

Power supply SPD is equipped with disconnector. If SPD fails, it will indicate through the indication window. SPD disconnector will not trip when it discharges lightning current. It is used to avoid fire hazardous caused by continuous fault current flowing through SPD when SPD is degraded.

For signal SPD, the risk of fire is small, so it is not required to set a disconnector. Normally, special lightning protection testing devices need to be used for off-line tests. Nowadays, with the technology development, the status indication function of signal SPD is becoming popular, so it’s also possible to judge by status indication.

As a SPD supplier , we can offer kinds of related products for sale, if you have needs, please contact us.

Intrinsic Safety RTD TC Temperature Transmitter(2022年11月17日)

chenzhuisolator — 2022-11-10T11:14:01+0900

https://www.chenzhuisolator.com/products/intrinsic-safety-rtd-tc-temperature-transmitter.html

Isolated intrinsically safe temperature transmitter, deliver the field thermocouple(TC) or thermal resistance(RTD) signal by digital linearization, converted to linearly with temperature of 4~20mA current and output isolatiedly.

Intrinsically safe temperature transmitter with RTD input has sensor disconnection alarm, TC input has sensor disconnection alarm and cold junction compensation automatically. By special software parameters such as range of transmitter, indexing number configurated.

Parameter of Intrinsic Safety RTD TC Temperature Transmitter
CZWB110-EXCZWB120-EXCZWB130-EX
Input signalPt100，Cu100，Cu50T、E、J、K、N、R、S、BPt100，Cu100，Cu50
T、E、J、K、N、R、S、B
Compensation range-20℃~+60℃-20℃~+60℃
Cold junction compensation accuracy±1℃±1℃
Output current4~20mA4~20mA4~20mA
Current output load resistanceRL≤（Ue-12）/0.021RL≤（Ue-12）/0.021RL≤（Ue-12）/0.021
Alarm indicationIH≈20.8mA/IL≈3.8mAIH≈20.8mA/IL≈3.8mAIH≈20.8mA/IL≈3.8mA
Supply voltage(Ue)12~28V DC12~28V DC12~28V DC
Power supply modeLoop poweredLoop poweredLoop powered
Temperature drift0.01%F.S./℃0.01%F.S./℃0.01%F.S./℃
Response timeReach 90% of final value in 1sReach 90% of final value in 1sReach 90% of final value in 1s
Dielectric strength(between input and output )1500V DC；1min1500V DC；1min1500V DC；1min
Insulation resistance≥100MΩ≥100MΩ≥100MΩ
Electromagnetic compatibilityGB/T 18268（IEC 61326-1）GB/T 18268（IEC 61326-1）GB/T 18268（IEC 61326-1）
Ambient temperatureT4：-40℃~+60℃
T6：-40℃~+50℃T4：-40℃~+60℃
T6：-40℃~+50℃T4：-40℃~+60℃
T6：-40℃~+50℃
EX markingEx iaⅡC T4/T6 GaEx iaⅡC T4/T6 GaEx iaⅡC T4/T6 Ga

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in automation safety.

We have over 24 years of experience in the design and manufacture of intrinsic barrier, surge protection device, isolated signal conditioner, safety relay, low power transmitter and temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

DO Signal (SIS) Input 24V DC 5A Safety Relay(2022年11月16日)

chenzhuisolator — 2022-11-10T11:13:35+0900

https://www.chenzhuisolator.com/products/do-signal-sis-input-24v-dc-5a-safety-relay.html

These safety relay are suitable for the application of E-Stop button, safety gate and DO signal from SIS, with several contacts output.

The emergency stop safety relay can be operated in single or double channel mode, manual or automatic reset, and with the function of monitoring the short circuit between channels.

Features & Advantages of DO SIS Signal Input 24V DC 5A Safety Relay
Several contacts output

Low start-up inrush current

Parameter of DO Signal (SIS) Input 24V DC 5A Safety Relay
CZSR8001-3A1BCZSR8001-2A2B
Supply voltage24V DC24V DC
Voltage tolerance0.85~1.10.85~1.1
Current consumption≤90mA (24V DC)≤90mA (24V DC)
Input current≤50mA (24V DC)≤50mA (24V DC)
Cable resistance≤15Ω≤15Ω
Input devicesDO signalsDO signals
Number of contacts3NO+1NC2NO+2NC
Contact materialAgSnO2 + 0.2 µm AuAgSnO2 + 0.2 µm Au
External contact fuse protection10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)10A gL/gG NEOZED (NO);
6A gL/gG NEOZED (NC)
Utilisation categoryIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24VIn accordance with EN60947-5-1:
AC-15, 5A/230V; DC-13, 5A/24V
Switch-on delay≤300ms≤300ms
Delay-on de-energisation≤30ms≤30ms
Recovery time≤100ms≤100ms
Supply short interruption20ms20ms
EMCEN60947, EN61000-6-2, EN61000-6-4EN60947, EN61000-6-2, EN61000-6-4
VibrationVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mmVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mm
Ambient temperature-20℃~+60℃-20℃~+60℃
Storage temperature-40℃~+85℃-40℃~+85℃
Relative humidity10%~90%10%~90%
Overvoltage categoryⅢⅢ
Pollution degree22
Rated insulation voltage250V AC250V AC
Rated impulse voltage6000V (1.2/50us)6000V (1.2/50us)
Dielectric strength1500V AC, 1min1500V AC, 1min
Clearance and creepage distanceIn accordance with EN 60947-1In accordance with EN 60947-1
Safety integrity levelSIL3SIL3
Performance levelPLePLe
CategoryCat.4Cat.4

CHENZHU strives to provide high-quality products and services to meet the expectations of our customers and interested parties by delivering outstanding performance. We have special talents to research and develop automation and safety system. Indeed, automation and safety are our interface products' main characters.

DC Power SPD(2022年11月15日)

chenzhuisolator — 2022-11-10T11:12:59+0900

https://www.chenzhuisolator.com/products/dc-power-spd/

Like all outdoor buildings, photovoltaic devices are vulnerable to lightning strikes. By far the biggest culprit for the power surges that damage solar panels are direct and indirect lightning strikes on the system. Our SPD DC power surge protectors help prevent DC overvolt voltage damage caused by lightning surges and other strong changes in power.

T range SPD DC surge protection devices for circuits are designed according to the IEC and GB standards and apply to low voltage DC systems. This DC surge arrester or suppressor by CHENZHU, a professional surge protection device manufacturer, enables the connection between the power supply system and an equipotential network instantaneously when the surge occurs and limits the residual voltage to a certain level to protect the devices protected.

Various types of DC voltage spike protection devices for circuits are available for you to select, such as type 2, 1000 V DC SPD. Buy our high quality DC power SPD right now and get the most competitive dc spd price.

FAQ of DC Power SPD
How to select SPD for DC power?-
1. Maximum continuous operating voltage Uc

2. Discharging capacity

3. Combination

Does the surge protector need power?

If you want to know more about how to select spd for solar system, please visit our website.

CZ3000 Temperature Converter Signal Conditioner(2022年11月14日)

chenzhuisolator — 2022-11-10T11:12:32+0900

https://www.chenzhuisolator.com/products/cz3000-temperature-converter-signal-conditioner.html

Thermal resistance type isolator, the two-wire or three-wire system resistance signal is converted into 0/4~20mA current signal isolation or 0/1~5V voltage signal output. It is intelligent, can through the computer scope of heat resistance index number range and configuration.

This 5v to 24v signal converter should be supplied power independently. Input circuit, output circuit and power supply are each galvanically isolated.

Advantages of CZ3000 Temperature Signal Conditioner
24V DC independent/ loop power supply

Line fault detection(LFD)

Configurable by software

Integral CJC on terminals/TC input terminals

Parameter of CZ3000 Temperature Converter Signal Conditioner
CZ3071
1/1CZ3076
1/2CZ3079
2/2
Input SignalPt100，Cu100，Cu50Pt100，Cu100，Cu50Pt100，Cu100，Cu50
Output Current/Load Resistance0~20mA，4~20mA / RL ≤300Ω0~20mA，4~20mA / RL ≤300Ω0~20mA，4~20mA / RL ≤300Ω
Output Voltage/Load Resistance0~5V，1~5V / RL ≥20kΩ0~5V，1~5V / RL ≥20kΩ0~5V，1~5V / RL ≥20kΩ
Fault Current of Overrange/UnderrangeIH≈20.8mA/IL≈3.8mAIH≈20.8mA/IL≈3.8mAIH≈20.8mA/IL≈3.8mA
Fault Current of Line BreakI≈20.8mAI≈20.8mAI≈20.8mA
Supply Voltage20~35V DC20~35V DC20~35V DC
Power Reverse ProtectionSupportSupportSupport
Current Consumption(Supply voltage:24V)≤35mA≤55mA≤55mA
Temperature Drift0.01%F.S./℃0.01%F.S./℃0.01%F.S./℃
Response Time (0~90%)≤1s≤1s≤1s
Dielectric Strength1500V AC;1min1500V AC;1min1500V AC;1min
Insulation Resistance≥100MΩ; 500V DC≥100MΩ; 500V DC≥100MΩ; 500V DC
EMC StandardsGB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)
Ambient Temperature-20℃~+60℃-20℃~+60℃-20℃~+60℃
Suitable Field Apparatus2-or 3-wire RTD2-or 3-wire RTD2-or 3-wire RTD

CZ3072
1/1CZ3074
1/2CZ3079.TC
2/2
Input Signal(Customized mV signal)T、E、J、K、N、R、S、BT、E、J、K、N、R、S、BT、E、J、K、N、R、S、B
Internal CJC Temperature Range-20℃~+60℃-20℃~+60℃-20℃~+60℃
CJC Precision±1℃±1℃±1℃
Output Current/Load Resistance0~20mA，4~20mA / RL≤300Ω0~20mA，4~20mA / RL≤300Ω0~20mA，4~20mA / RL≤300Ω
Output Voltage/Load Resistance0~5V，1~5V / RL ≥20kΩ0~5V，1~5V / RL ≥20kΩ0~5V，1~5V / RL ≥20kΩ
Fault Current of Overrange/UnderrangeIH≈20.8mA/IL ≈3.8mAIH≈20.8mA/IL ≈3.8mAIH≈20.8mA/IL ≈3.8mA
Fault Current of Line BreakI≈20.8mAI≈20.8mAI≈20.8mA
Supply Voltage20~35V DC20~35V DC20~35V DC
Power Reverse ProtectionSupportSupportSupport
Current Consumption(Supply voltage:24V)≤35mA≤55mA≤55mA
Temperature Drift0.01%F.S./℃0.01%F.S./℃0.01%F.S./℃
Response Time (0~90%)≤1s≤1s≤1s
Dielectric Strength1500V AC;1min1500V AC;1min1500V AC;1min
Insulation Resistance≥100MΩ; 500V DC≥100MΩ; 500V DC≥100MΩ; 500V DC
EMC StandardsGB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)
Ambient Temperature-20℃~+60℃-20℃~+60℃-20℃~+60℃
Suitable Field ApparatusTC and mV signal sensorTC and mV signal sensorTC and mV signal sensor

1/1：CZ3077
2/2：CZ30781/1：CZ3177
2/2：CZ31781/1：CZ3277
2/2：CZ3278
Input SignalPt100，Cu100，Cu50T、E、J、K、N、R、S、B
(Customized mV signal)Pt100，Cu100，Cu50
T、E、J、K、N、R、S、B
Internal CJC Temperature Range-20~+60℃-20~+60℃
CJC Precision±1℃±1℃
Output Current4~20mA4~20mA4~20mA
Load ResistanceRL ≤(Ue -12)/0.021ΩRL ≤(Ue -12)/0.021ΩRL ≤(Ue -12)/0.021Ω
Fault Current of Overrange/UnderrangeIL ≈20.8mA/IL ≈3.8mAIL ≈20.8mA/IL ≈3.8mAIL ≈20.8mA/IL ≈3.8mA
Fault Current of Line BreakI≈20.8mAI≈20.8mAI≈20.8mA
Loop Supply Voltage(Ue)12~30V DC12~30V DC12~30V DC
Power Reverse ProtectionSupportSupportSupport
Temperature Drift0.01%F.S./℃0.01%F.S./℃0.01%F.S./℃
Response Time (0~90%)≤1s≤1s≤1s
Dielectric Strength1500V AC;1min1500V AC;1min1500V AC;1min
Insulation Resistance≥100MΩ; 500V DC≥100MΩ; 500V DC≥100MΩ; 500V DC
EMC StandardsGB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)
Ambient Temperature-20℃~+60℃-20℃~+60℃-20℃~+60℃
Suitable Field Apparatus2-or 3-wire RTDTC sensor，mV signalRTD，TC sensor

Established in 2002, CHENZHU has developed as a manufacturing center that is able to manufacture 4 main categories of the product (Isolated Barrier, Signal Conditioner, spd surge protection device, Safety Relay) with 18 ranges of series. In all, we have more than 500 plus models and more than 2000 specifications that can be configured to fit your needs.

CZ3000 Pulse Input Signal Conditioner(2022年11月13日)

chenzhuisolator — 2022-11-10T11:12:00+0900

https://www.chenzhuisolator.com/products/cz3000-pulse-input-signal-conditioner.html

Voltage pulse output signal conditioners transfer the pulse voltage signal and provide isolated power supply for field instruments. The input adopts hysteresis comparison circuit and has high anti-interference performance. It has two output way: pulse voltage output and transistor output.

This 5v to 24v plc signal converter needs an independent power supply and galvanic isolation among power supply, input and output.

Advantages of CZ3000 Pulse Input Signal Conditioner
24V DC independent power supply

PNP/NPN transistor output or voltage pulse output

Parameter of CZ3000 Pulse Input Signal Conditioner
CZ3051
1/1CZ3052
2/2CZ3053
1/2
Frequency Range≤10kHz，Duty cycle≥30%≤10kHz，Duty cycle≥30%≤10kHz，Duty cycle≥30%
Pulse Voltage Level4V≤VH≤12V，VL≤1V4V≤VH≤12V，VL≤1V4V≤VH≤12V，VL≤1V
Distribution Voltage(Specify when ordering)No power distribution
5V or 12V or 24V@20mANo power distribution
5V or 12V or 24V@20mANo power distribution
5V or 12V or 24V@20mA
External Supply Voltage Vcc (Transistor output)≤35V DC≤35V DC≤35V DC
Max.on-stage Current(Transistor output)≤35mA≤35mA≤35mA
Transistor Collector OutputVH：Vcc，VL ：≤2.5VVH：Vcc，VL ：≤2.5VVH：Vcc，VL ：≤2.5V
Pull-up Resistance2kΩ≤RL ≤20kΩ2kΩ≤RL ≤20kΩ2kΩ≤RL ≤20kΩ
Transistor Emitter OutputVH：Vcc-2.5V，VL ：≤0.5VVH：Vcc-2.5V，VL ：≤0.5VVH：Vcc-2.5V，VL ：≤0.5V
Pull-down Resistance2kΩ≤RL ≤10kΩ2kΩ≤RL ≤10kΩ2kΩ≤RL ≤10kΩ
Voltage Pulse OutputVH：4.5V≤VH≤24V，VL ：≤0.5VVH：4.5V≤VH≤24V，VL ：≤0.5VVH：4.5V≤VH≤24V，VL ：≤0.5V
Load ResistanceRL ≥1kΩRL ≥1kΩRL ≥1kΩ
Supply Voltage20~35V DC20~35V DC20~35V DC
Power Reverse ProtectionSupportSupportSupport
Current Consumption
(Supply voltage:24V, no power distribution)≤30mA≤55mA≤50mA
Dielectric Strength1500V AC;1min1500V AC;1min1500V AC;1min
Insulation Resistance≥100MΩ≥100MΩ≥100MΩ
EMC StandardsGB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)GB/T 18268(IEC 61326-1)
Ambient Temperature-20℃~+60℃-20℃~+60℃-20℃~+60℃
Suitable Field Apparatus2-or 3-wire voltage pulse source2-or 3-wire voltage pulse source2-or 3-wire voltage pulse source

CHENZHU independently developed intrinsic barrier, signal conditioner, SPD, temperature transmitters and other products long-term protection of the metallurgical industry automation system operation safety, successfully applied to the metallurgical industry, such as blast furnaces, furnaces, sintering, coking, industrial furnaces, heating furnaces, oxygen machines, alumina, copper smelting and other steel and non-ferrous metal smelting and processing processes.

AC Power SPD(2022年11月12日)

chenzhuisolator — 2022-11-10T11:11:30+0900

https://www.chenzhuisolator.com/products/ac-power-spd/

The power surge protector for ac compressor unit is designed to prevent transient surge conditions. Large single surge events, such as lightning, can reach hundreds of thousands of volts and can cause immediate or intermittent equipment failure. However, lightning and power anomalies account for only 20% of instantaneous surges. The remaining 80% of the surge activity is generated internally.

Our AC SPD surge protection device, also called AC surge arrester or AC surge suppressor, supports long-term system reliability by absorbing large amounts of transient energy while maintaining low clamp voltages.

Our type 2 AC surge protector SPD can provide high-quality, safe and reliable surge protection for devices in power supply circuit systems.

The voltage protector for AC compressor is widely used in petrochemical, gas, environmental protection and new energy industries.

CHENZHU, a reliable company in safety and automation system, also provide various other surge protectors to meet the needs of our customers, such as mini split voltage protector. For the price of ac power surge protection device and other related information, please feel free to contact us.

FAQ of AC Surge Protector
How to select SPD for AC power？-
1. Maximum continuous operating voltage Uc

2. Discharging capacity

3. Combination

What is In and limp means?

If you want to know more about ac spd price, please contact us.

40KA AC Power SPD(2022年11月11日)

chenzhuisolator — 2022-11-10T11:11:03+0900

https://www.chenzhuisolator.com/products/40ka-ac-power-spd.html

SPD for AC power; 220VAC, TN system, Single phase; In(8/20us): 20kA/phase, Imax: 40kA/phase; hot-pluggable; fault indication

Features & Advantages of 40KA SPD
Status indication:

Green: OK

Red: Failed

Lightning surge protection device modules can be replaced online.

Remote alarm output is optional, named with "F".

It is normally installed at the boundary of LPZ1 and LPZ2 or subsequent LPZs.

Parameter of 40KA AC Power Signal SPD
T2-40/2P
T2-40/2PFT2-40/3P
T2-40/3PFT2-40/4P
T2-40/4PFT2-40/1P+1
T2-40/1P+1FT2-40/3P+1
T2-40/3P+1FT2-40/ 700/3P
T2-40/700 /3PFT2-40/ 700/4P
T2-40/700 /4PF
Max. continuous operating voltage Uc385VAC385VAC385VAC385VAC385VAC700VAC700VAC
Nominal discharge current In(8/20µs)20kA20kA20kA20kA20kA20kA20kA
Max. discharge current Imax(8/20µs)40kA40kA40kA40kA40kA40kA40kA
Voltage protection level Up1.7kV1.7kV1.7kV1.7kV1.7kV2.8kV2.8kV
Recommended backup fuse80A gG80A gG80A gG80A gG80A gG80A gG80A gG
Recommended grounding cable6~35mm26~35mm26~35mm26~35mm26~35mm26~35mm26~35mm2
Response time25ns25ns25ns25ns25ns25ns25ns
Residual current IPE<10μA<10μA<10μA<10μA<10μA<20μA<20μA
Remote alarm output250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A
Housing protection grade(IEC60529)IP 20IP 20IP 20IP 20IP 20IP 20IP 20
Housing material/inflammability rating(UL94)PA66/V0PA66/V0PA66/V0PA66/V0PA66/V0PA66/V0PA66/V0
Testing standardIEC 61643-11IEC 61643-11IEC 61643-11IEC 61643-11IEC 61643-11IEC 61643-11IEC 61643-11
Suitable for power supply systemTN system(single phase)IT,TN-C system(three phase)TN-S system(three phase)IT,TN-C system(three phase)TN-S system(three phase)

20KA AC Power SPD(2022年11月10日)

chenzhuisolator — 2022-11-10T11:10:04+0900

https://www.chenzhuisolator.com/products/20ka-ac-power-spd.html

SPD for AC power; 220VAC, TN system, Single phase; In(8/20us): 10kA/phase, Imax: 20kA/phase; hot-pluggable; fault indication.

Features & Advantages of 20KA SPD
Status indication:

Green: OK

Red: Failed

Lightning protection device modules can be replaced online.

Remote alarm output is optional, named with "F".

It is normally installed at the boundary of LPZ1 and LPZ2 or subsequent LPZs.

Parameter of 20KA AC Power SPD
T2-20/2P
T2-20/2PFT2-20/3P
T2-20/3PFT2-20/4P
T2-20/4PFT2-20/1P+1
T2-20/1P+1FT2-20/3P+1
T2-20/3P+1F
Max. continuous operating voltage Uc320VAC320VAC320VAC320VAC320VAC
Nominal discharge current In(8/20µs)10kA10kA10kA10kA10kA
Max. discharge current Imax(8/20µs)20kA20kA20kA20kA20kA
Voltage protection level Up1.2kV1.2kV1.2kV1.2kV1.2kV
Recommended backup fuse40A gG40A gG40A gG40A gG40A gG
Recommended grounding cable4~35mm24~35mm24~35mm24~35mm24~35mm2
Response time25ns25ns25ns25ns25ns
Residual current IPE<10μA<10μA<10μA<10μA<10μA
Remote alarm output250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A250VAC/0.5A;24VDC/0.5A
Housing protection grade(IEC60529)IP 20IP 20IP 20IP 20IP 20
Housing material/inflammability rating(UL94)PA66/V0PA66/V0PA66/V0PA66/V0PA66/V0
Testing standardIEC 61643-11IEC 61643-11IEC 61643-11IEC 61643-11IEC 61643-11
Suitable for power supply systemTN system(single phase)IT,TN-C system(three phase)TN-S system(three phase)IT,TN-C system(single phase)TT system(three phase)

Power Transmitter Product Video(2022年04月26日)

chenzhuisolator — 2022-04-20T17:28:36+0900

https://www.chenzhuisolator.com/video/power-transmitter-product-video.html

Related Video
AC Power SPD
GS4000-EX Series Backplane Intrinsically Safe Barrier
CZSR Process Series Safety Relay

Power Transmitter Product Video
Create Time: 06 ,04 ,2021

Related Products for Reference
Photovoltaic 1500 DC Power SPD
CZ2000 Analogue Signal Conditioner
Network SPD

We also have types of 24v to 5v signal converter for sale, if you have needs, please contact us.

CHENZHU has got intergraded management service Certificates, like ISO9001, ISO14001 and OHSAS45001, more than 110 patents related core tech was obtained, reference OEM and ODM customers from German, Japan and direct shipments to any global destinations.

CHENZHU SIL3 Process series Safety Relay(2022年04月26日)

chenzhuisolator — 2022-04-20T17:28:08+0900

https://www.chenzhuisolator.com/video/chenzhu-sil3-process-series-safety-relay.html

Video of CHENZHU SIL3 Process series Safety Relay

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in automation safety.

We have over 24 years of experience in the design and manufacture of intrinsic barrier, signal conditioner, surge protection device, safety relay, low power transmitter and digital temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

If you want to know more about sil 3 relay, please visit our website.

CZ3000 Temperature Converter Signal Conditioner(2022年04月25日)

chenzhuisolator — 2022-04-20T17:27:33+0900

https://www.chenzhuisolator.com/products/cz3000-temperature-converter-signal-conditioner.html

Thermal resistance type analog isolator, the two-wire or three-wire system resistance signal is converted into 0/4~20mA current signal isolation or 0/1~5V voltage signal output. It is intelligent, can through the computer scope of heat resistance index number range and configuration.

This 5v to 24v signal converter should be supplied power independently. Input circuit, output circuit and power supply are each galvanically isolated.

Advantages of CZ3000 Temperature Converter Signal Conditioner
24V DC independent/ loop power supply

Line fault detection(LFD)

Configurable by software

Integral CJC on terminals/TC input terminals

Parameter of CZ3000 Temperature Converter Signal Conditioner

If you want to know more about Chenzhu, please visit our website.

The Working Principle and Classification of Surge Protector(2022年04月24日)

chenzhuisolator — 2022-04-20T17:27:06+0900

https://www.chenzhuisolator.com/the-working-principle-and-classification-of-surge-protector.html

Ⅱ. Types of surge protection device
SPD surge protection device is classified according to its working principle:

The categories of surge protection device by use are:

1. Power protection device: AC power protection device, DC power protection device, switch type power protection device and so on.

2. Signal surge protection device: low frequency signal protection device, high frequency signal protection device, antenna surge protector and so on.

The Principle and Classification of Safety Barriers(2022年04月23日)

chenzhuisolator — 2022-04-20T17:26:34+0900

https://www.chenzhuisolator.com/the-principle-and-classification-of-safety-barriers.html

1. What is an intrinsic safety barrier?

Safety barriers are generally used in intrinsic safety systems. Intrinsic safety refers to system explosion-proof technology, which refers to the function of making production equipment or production system itself safe through design and other means, and will not cause accidents even in the case of misoperation or failure. The safety barrier is a commonly used associated equipment in intrinsic safety explosion-proof systems. The safety barrier is a circuit between the field equipment and the control room that limits energy.

2. The basic function of intrinsic safety barrier

To enable intrinsic safety equipment in hazardous locations to work normally, and to limit the electrical energy supplied to field instruments from the control room to a range that can neither generate sparks which are sufficient to detonate dangerous gases nor enable instrument surface temperature to be high enough to detonate dangerous gases.

3. Classification of intrinsic safety barriers

Intrinsic safety barrier, as the associated equipment between the non-intrinsic safety equipment in the control room and the intrinsic safety equipment in hazardous locations, is an important part of the intrinsic safety explosion-proof system. According to the structure, it is divided into two types: Zener safety barrier and isolation safety barrier.

(1) Zener intrinsic safety barrier. In the circuit, the fast fuses, current limiting resistors and parallel voltage limiting Zener diodes are connected in series to realize the energy limitation, and to ensure that the energy is safely limited when the signals of instrument in dangerous area and the instrument in safe area are connected. It uses very few components, with advantages of small size, and low price, but there are also some fatal flaws, which greatly restrict its scope of application.

(2) Isolated safety barrier. A circuit structure that electrically isolates the input, output, and power supply from each other is adopted. It has both the energy limiting function and the isolation function, and at the same time it meets the requirements of intrinsic safety energy limiting. Isolated intrinsic barriers are mainly composed of loop energy limiting units, signal and power isolation units, and signal processing units. Its outstanding performance advantages have brought great benefits to users in applications.

Isolated safety barriers have outstanding advantages and a wider range of uses. Although the price is slightly higher than the Zener safety barrier, considering the design, construction, installation, commissioning and maintenance costs, the overall cost may be lower than that of the Zener safety barrier.
If you want to know more about intrinsic safe barrier how it works, please visit our website.

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in automation safety.

Safety Relay Working Principle(2022年04月22日)

chenzhuisolator — 2022-04-20T17:26:02+0900

https://www.chenzhuisolator.com/safety-relay-working-principle.html

1. Introduction of safety relay
A safety relay is an electrical component used in daily life for safety to prevent electric shocks and to prevent equipment from overheating. As the name implies, it is a relay that can make regular actions in the event of a safety accident. The safety relay is a combination of several relays and circuits, in order to complement each other's abnormal defects and achieve the complete function of the relay with low malfunction actions. The lower the error and failure value are, the higher the safety factor will be.

2. Working principle of a relay
Do you know how does a safety relay work? The safety relay interlock system has a forcibly guided contact structure, which is a necessary control part in a safety circuit. It accepts safety inputs, and deterministically outputs the switch signal to the control circuit of the device through the judgment of the internal circuit. Simply put, the safety relays are all dual-channel signal types.

If you want to buy a high quaity network surge protection device, please contact us.

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in automation safety.

We have over 24 years of experience in the design and manufacture of intrinsic barrier, signal conditioner, surge protection device, safety relay, low power transmitter and temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

Quality Control(2022年04月20日)

chenzhuisolator — 2022-04-20T17:25:24+0900

https://www.chenzhuisolator.com/quality-control1/

Chenzhu is a ISO 9001:2015 certified company. In our production department, process quality checks are comprehensive work at every stage of production and are documented. Quality control is strictly monitored from material to final products. We ensure that our customers receive the best quality products at the lowest price.

Quality Concept
Quality is our eternal commitment to our customers. Quality control shanghai is written into every step of CHENZHU's automation safety production processes, from design to produceing, from manufacture to staff traning.

Raw Material Inspection
For detailed raw material inspection and selection, we have the most modern quality assurance factory, accessories from well-known brands.

If you want to know more about safety automation system, please visit our website.

A Brief Introduction of Intrinsically Safe Barrier(2022年04月20日)

chenzhuisolator — 2022-04-20T17:24:52+0900

https://www.chenzhuisolator.com/a-brief-introduction-of-intrinsically-safe-barrier.html

Safety barriers in instrumentation improves workplace safety by limiting the energy available in the process.

Ⅰ. What is intrinsically safe barrier?
Intrinsic barrier is the related equipment of explosion-proof instruments and meters, which does not affect the function of the measurement system under normal conditions. It is set on one side of the safe place, and when the intrinsic safe explosion-proof system fails, it can limit the energy (electric energy) entering the dangerous place to the safe value, so as to ensure the safety of the site.

Ⅱ. Types of intrinsically safe barriers
Intrinsically safe barrier is divided into two types: zener diode safety barrier and isolated safety barrier.

1. Zener diode safety barrier

2. Isolated safety barrier

(1) Due to the use of three-party isolation mode, there is no need for system grounding lines, which brings great convenience to the design and on-site construction.

(2) The requirements for instruments in the dangerous area are greatly reduced, and there is no need to use isolated instruments on the spot.

If you want to know more about how does an intrinsically safe barrier work, please visit our website.

Chenzhu has got intergraded management service Certificates, like ISO9001, ISO14001 and OHSAS45001, more than 110 patents related core tech was obtained, reference OEM and ODM customers from German, Japan and direct shipments to any global destinations.

Temperature Transmitter(2022年02月22日)

chenzhuisolator — 2022-02-10T13:08:51+0900

https://www.chenzhuisolator.com/products/temperature-transmitter/

CHENZHU, a reliable temperature sensor and temperature transmitter manufacturer, provides a large range of head-mounted temperature transmitters with affordable price. Working principle of intrinsically safe temperature transmitter: the thermometer transmitter transforms the temperature into an electrical signal no matter how tiny the amount of the signal might be.

CHENZHU provides RTD input, TC input and RTD/TC input thermistor temperature transmitters. Based on the safety and automation system, thermocouple temperature transmitters play an important role in the industrial field.

Different types of temp transmitters are available in CHENZHU. Some are designed to be explosion proof, some are equipped with display. Our digital temperature transmitters are especially popular among customers and are widely used for industrial purposes.

CZWB Series Temperature Transmitter
The CZWB series is an intelligent temperature transmitter designed specifically for industrial complexity. This product is mainly installed in the head of the temperature sensor, the sensor is upgraded to an integrated temperature transmitter, to achieve the temperature of the field display and data transmission.
RTD TC Temperature Transmitter
Intrinsic Safety RTD TC Temperature Transmitter

FAQ of Temperature Transmitter
What is temperature transmitter?-
The explosion proof temperature transmitter used RTD/TC as thermometers to temperature convert temperature variables into instruments that can transmit standardized output signals. Typically, a TC or RTD temperature transmitter sends or transmits a standardized output signal to a control device. Common electrical output signals are 4-20mA or 0-10V DC range in manufacturing plants.

What is the difference between a temperature sensor and transmitter?

Surge Protection Device(2022年02月21日)

chenzhuisolator — 2022-02-10T13:08:12+0900

https://www.chenzhuisolator.com/products/surge-protection-device/

CHENZHU SPD (surge protection device) lightning surge protection circuit device has a fast and powerful surge current leakage capacity. In the lightning surge interference, the lightning proof surge protector for electrical panel ensures the safety of the industrial automation control system a variety of field equipment and control equipment.

The SPD 3 phase industrial power strip surge protector created by Chenzhu, one of the most professional surge protection device manufacturers, has integrated lightning-proof technology, intrinsic safety explosion-proof technology, and functional automation safety technology. As a result, the SPD electrical surge protection device by CHENZHU, a reliable spd factory, spd supplier, spd enterprises, is the first 20kA anti-surge capacity of the leading products in China. The SPD panel box surge protector supplied by CHENZHU is also an important part of the safety automation system like the intrinsic safety barrier, signal conditioner, safety relay, etc.

Surge Protection Device Types
Signal SPD
SPD electrical devices are always threatened by power surges and transients caused by power failures or nearby lightning strikes. Signal SPD was born to protect electronic devices in automatic control systems.
Intrinsic Safety 5V Signal SPD
Intrinsic Safety 24V Signal SPD
Signal SPD For 5V
Signal SPD For 24V

Low Power SPD
The surge protector is designed to prevent transient surge conditions. T range SPD for low power supply is used for protecting 24VDC equipment on site or in the control room from being damaged by lightning surge voltage or operating over voltage.
24VDC 10kA Low Power SPD

AC Power SPD
The surge protector is designed to prevent transient surge conditions. Large single surge events, such as lightning, can reach hundreds of thousands of volts and can cause immediate or intermittent equipment failure. However, lightning and power anomalies account for only 20% of instantaneous surges.

20KA AC Power SPD
40KA AC Power SPD
80KA AC Power SPD

DC Power SPD
Like all outdoor buildings, photovoltaic devices are vulnerable to lightning strikes. By far the biggest culprit for the power surges that damage solar panels are direct and indirect lightning strikes on the system. Our DC surge protectors help prevent DC overvolt voltage damage caused by lightning surges and other strong changes in power.

Photovoltaic 1000 DC Power SPD
Screw Mounting SPD
CZLBX-48 series surge protective device is designed for protesting devices in the field instruments which is usually caused by lightning strikes.
Screw Mounting SPD Parallel Connection

Network SPD
The network surge protector suppressor protects a data line, including computer network signals, communication devices, and so on. Plug the network surge protector into the data cable and ground it to prevent lightning surges from damaging the device.

Antennas And Feeders SPD
Antennas feeders SPD is used in the antenna feeder circuit of the radio communication station to suppress the induced lightning waves from the antenna feeder to protect the radio communication equipment from lightning strikes.
FAQ of Surge Protection Device
How Does A Surge Protection Device Working?-
Whether it's type 1, 4 pole or type 2, multi pole SPD surge protection device, both type 1 and type 2 surge arresters prevent devices from being damaged by a surge (transient overvoltage) by discharging surge current to the ground. The type 1 & type 2 surge protection unit will be generated. When a lightning strike occurs, the high-power devices are switched on or off, electrostatic charges are discharged. These happen every day.

Is A Surge Protection Necessary?+
What Is Type 2 Surge Protection Device?+
How Long Can SPD Lifetime Be？

Now we offer spd for sale and the spd surge protection device price is affordable, if you want to buy spd devices, please contact us.

Signal SPD(2022年02月15日)

chenzhuisolator — 2022-02-10T13:07:39+0900

https://www.chenzhuisolator.com/products/signal-spd/

Electronic devices are always threatened by power surges and transients caused by power failures or nearby lightning strikes.

Signal SPD surge protection device is born to protect electronic devices in automatic control systems.

The signal surge protection device can provide surge protection for field equipments such as sensors, transmitters, flow meters, solenoid valves, thermocouples, thermal resistance, devices with RS485 or RS232 interface and for I/O interfaces such as Al, AO, Dl, DO, Tl, Pl in PLC, DCS, FGS, ESD control systems.

Signal surge protector, data surge protector is widely used in petrochemical, gas, environmental protection and new energy industries.

Signal SPD
Intrinsic Safety 5V Signal SPD
Intrinsic Safety 24V Signal SPD
Signal SPD For 5V
Signal SPD For 24V

FAQ of Signal SPD
How do I choose a signal SPD?-
CHENZHU SPD for signal is mounted by DIN rail. It can be selected from informations below.

1. Type of the signal

According to the signal type, we can get the information of the signal voltage, so as to determine Uc.

For example, normally,

AI, AO: 24V,

DI, DO: 24V,

RS485， TC：5V，

RS232：12V

RTD：5V.

2. Rated current IL

Since signal spd for signal is normally installed in range, operating current will go through SPD. If operating current is bigger than IL of SPD, SPD will be damaged. Normally IL will be big enough. For 3-wire, 4-wire carrier current transmitters and DO signals which have higher power consumption, IL need to be checked.

3. Number of wires to be protected

Select 2 wires, 3 wires, 4 wires accordingly.

4. Is intrinsically safe explosion-proof required?

Yes——select intrinsically safe SPD;

No——select non intrinsic safety SPD.

Signal Conditioner(2022年02月14日)

chenzhuisolator — 2022-02-10T13:07:10+0900

https://www.chenzhuisolator.com/products/signal-conditioner/

Universal signal conditioner is used in industrial process control systems. It connects industrial field instruments and control systems to complete the function of signal matching and conversion. Through reliable isolation technology, the signal conditioning equipment resists various interference attacks and ensures the stability of the system and instruments in a complex electromagnetic environment. The isolated pt 100 signal conditioner of Chenzhu using special design achieves anti-interference among power supply, input, and output. At the same time, the signal conditioning module/unit has a strong EMC performance that can work normally even under strong interference.

So far, our signal conditioning amplifier for electronics, as a member of the whole safety and automation system, has been applied to tens of thousands of industrial sites. And the stability of the control system escort, possessing the most complete models, has reached the international level. As one of the most professional signal isolator suppliers, Chenzhu promises to provide you good transducer signal conditioning and services! Different types of signal conditioning system for circuits can be offered by us, whether it's based on RTD loop powered digital signal isolator or DC Pt100 signal splitter with 4-20mA output current. If you want to know the price of our 24v to 5v signal converter, please contact us as soon as possible. Related sensors and signal conditioning pdf files are also available for you to refer to.

CZ2000 Series Signal Conditioner
CZ2000 range signal conditioners use high-efficiency electromagnetic isolation technology to achieve reliable galvanic isolation among power supply，input，and output, which effectively solves the problem of field interference in industrial automation and safety control systems. This ensures a stable and reliable operation of the system.

CZ2000 Analogue Signal Conditioner
CZ2000 Analogue Signal Conditioner Loop Power
CZ2000 Temperature Converter Signal Conditioner
CZ2000 Voltage/Current Input Signal Conditioner
CZ3000 Series Signal Conditioner
CZ3000 range signal conditioners are electrical devices, which are connected between the industrial field instrument and the control room. They effectively solve the field interference of industrial automation control systems and ensure stable and reliable operation of the system through reliable galvanic isolation among the power supply, input, and output.

CZ3000 Analogue Signal Conditioner
CZ3000 Analogue Signal Conditioner Loop Power
CZ3000 Temperature Converter Signal Conditioner
CZ3000 Pulse Input Signal Conditioner
CZ3000 Frequency Converter Signal Conditioner
CZ3500 Series Bus powered Signal Conditioner
CZ3500 range rail-powered signal conditioners are high-performance products. The new design concept and technology are perfectly combined to achieve various performance characteristics, such as high-precision, small-volume, easy installation and high interference suppression, ensuring more convenient system integration and more reliable operation.
What is the difference between 2-wire transmitter, 3-wire transmitter and 4-wire transmitter?

2-wire transmitter
2-wire transmitters are the simplest and most economical way to used them in the industrial field. The zero-end current is 4mA, which is sufficient to drive the transmitter's internal circuitry, while the current at 4-20mA represents the range of process transmissions measured.

3-wire transmitter
Some transmitter require more power than the signal loop can supply their internal circuity. The three-wire current output can share a ground wire with the power supply, saving a wire.

4-wire transmitter
Four-wire transmitters have their own internal power supply, and they do not need to be connected to a DC power supply. It has two power cords and two current output lines. The output of a 4-wire transmitter is usually a current signal.

FAQ of Signal Isolators
How to distinguish between the active and passive signals?-
According to whether the signal acquisition loop needs an external power supply,

Method of judging whether the external power supply is needed in the signal acquisition loop：

Temperature Input Signal Type and Range

Safety Relay(2022年02月11日)

chenzhuisolator — 2022-02-10T13:06:31+0900

https://www.chenzhuisolator.com/products/safety-relay/

Automation direct safety relays are mainly applied to the safety control circuit, connecting the safety sensing elements and mechanical equipment motion controller. The working principle of safety relay system: when there is a fault in the safety circuit, the intrinsically safe barrier relay automatically detects the fault and stops the machine movement, to protect equipment and personnel safety.

Various safety relay products are available for you to select. We have two hand control safety relay for E-stop buttons, emergency stop buttons, two-hand control buttons. We also provide light curtain safety relay, sil 2 and sil 3 rated relays to better meet the needs of our customers. For more information, please feel free to contact us.

Safety Relay Types
CZSR Classic Series Safety Relay
CZSR Classic Series Safety Relay is a classic general-purpose safety relay with high cost performance, suitable for various industrial automation applications. Including E-stop buttons, safety gates, light beam devices, two-hand control buttons, safety mats and extension module.
E-Stop Button, Safety Gate Safety Relay
Light Curtain Safety Relay
Two-hand Push Buttons Safety Relay
Safety Mat Safety Relay
Extension Module Safetu Relay

CZSR Process Series Safety Relay
Since the beginning of the industrial age, examples of critical processes have been common. Automation safety instrumented systems are most commonly used in process (such as refineries, chemical, nuclear power) facilities to provide protection.

DO Signal (SIS) 24V DC 3A Safety Relay
DO Signal (SIS) Input 24V DC 5A Safety Relay
CZSR Smart Series Safety Relay
CZSR Smart range is a smart safety controller product that can be flexibly configured with logic, and is suitable for small stand-alone automation equipment.

FAQ of Safety Relay
What is safety relay?-
Safety relay offer an extra level of protection usually through a redundant wiring system.

What is the difference between a relay and a safety relay?+
How do safety relays work?+
How do safety relays improve safety?+
What are the main applications of safety relays?+
What's the line monitoring function of Safety Relay?

Power Transmitter(2022年02月10日)

chenzhuisolator — 2022-02-10T13:05:50+0900

https://www.chenzhuisolator.com/products/power-transmitter/

CZDL Series AC/DC Current/Voltage Conver To 4-20ma Power Transmitter
Power transmitter adopts the true RMS detection technology, can transfer complicated current like 0~1A/0~5A/0~10A into industry standard output. We offer DC supply (True RMS) or AC supply for your choice. The product can be used in the detection of the non-sinusoidal current signal, such as switching mode power supply, thyristor output current, etc.

FAQ of Power Transmitter
What is a power transmitter?-
A high power transmitter, low power transmitter is a measuring instrument that converts the measured power( AC voltage, AC current, reactive power, reactive energy, frequency, phase, power factor, DC voltage, DC current, etc.) into a linear proportional DC current or voltage output( electrical pulse output). It is widely used in electric power, petroleum, coal, metallurgy, railways and other departments of electrical measurement, automatic control and scheduling systems.
If you need safety automation system, please contact us.

We offer dc power surge protector for sale, if you want to know more details, please visit our website.

Interface Product Used in Machinery(2021年08月26日)

chenzhuisolator — 2021-08-11T10:04:50+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-machinery.html

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in safety and automation system. We have over 24 years of experience in the design and manufacture of intrinsic barrier, signal isolators, surge protection device, safety relay, automation direct safety relay, intrinsically safe barrier relay, power transmitter and temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

Heavy equipment and industrial machines are more complex than ever. In an increasingly competitive market, companies must ensure the stability of their equipment and the safety of their personnel.

CHENZHU supports general machinery manufacturing companies with automation safety solutions and services.

By working closely with machinery manufacturers for a long time in a wide range of industrial areas, we are aware of the challenges of specific industries on a daily basis. In terms of its breadth and depth, CHENZHU offers an excellent choice of solutions.

Interface Product Used in Robots(2021年08月25日)

chenzhuisolator — 2021-08-11T10:04:23+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-robots.html

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in automation safety. We have over 24 years of experience in the design and manufacture of intrinsic barrier, signal conditioner, surge protection device, safety relay, power transmitter and temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

With the continuous production problems in the process of industrial production, the safety of industrial production has been paid attention to, which is particularly important in the field of safety of people and robot. Most robots require e-stop and some type of fence circuit for their safety functions.

Under the safety automation system, safety relay from CHENZHU helps robots make more intelligent decisions.

Also, the safety relay gives robots the ability to sense objects, the environment, and their own position.

Interface Product Used in Pharmaceutical(2021年08月24日)

chenzhuisolator — 2021-08-11T10:03:59+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-pharmaceutical.html

SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in safety automation system. We have over 24 years of experience in the design and manufacture of intrinsic barrier, signal conditioner, surge protection device, safety relay,signal arrester, power transmitter and temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

CHENZHU's safety interface products are precisely designed that can be used in the DCS automation control system of the pharmaceutical industry. The DCS system is involving the biochemical process of key industrial equipment or industrial processes, such as fermentation tanks, reactors, extraction tanks, evaporators, etc. The product allows automation of manufacturing processes.

Whether you are looking for a medical equipment assembly solution for automation safety or a pharmaceutical process control product, we have engineering expertise and solutions to help you get up and run quickly and efficiently.

CHENZHU has become a trusted partner and manufacturer for companies seeking creative solutions to classic production problems.

Interface Product Used in Metallurgy(2021年08月23日)

chenzhuisolator — 2021-08-11T10:03:34+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-metallurgy.html

SHANGHAI CHENZHU INSTRUMENT CO., LTD., signal isolator suppliers, is a very established provider that specialises in automation and safety. We have over 24 years of experience in the design and manufacture of intrinsic barrier, signal conditioner, surge protection device, safety relay, signal conditioning isolation, digital signal isolator, power transmitter and intrinsically safe temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.

With the development of science and technology, metallurgical enterprises increasingly need to realize automation to ensure the efficiency and safety of production.

CHENZHU independently developed intrinsic isolated barrier, signal conditioner, SPD, temperature transmitters and other products long-term protection of the metallurgical industry operation system of automation and safety, successfully applied to the metallurgical industry, such as blast furnaces, furnaces, sintering, coking, industrial furnaces, heating furnaces, oxygen machines, alumina, copper smelting and other steel and non-ferrous metal smelting and processing processes.

CHENZHU has become a better choice for many metallurgical enterprises.

Interface Product Used in Water Treatment(2021年08月19日)

chenzhuisolator — 2021-08-11T10:03:07+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-water-treatmen.html

The water treatment process is complex. In order to ensure the safe and reliable operation of water treatment processes and equipment and scientific management processes, the importance of automated water treatment control is constantly reflected.

Isolated barrier and signal conditioner by CHENZHU can be used to simplify the process of wastewater treatment plants, not only enhance the reliability and accuracy of the entire safety automation system but also reduce labour intensity, lower treatment costs and save energy.

The water treatment plant is very important for people's daily life. To ensure the normal and safe operation of the plant, we also need to pay attention to the "tiny" interface product.

Interface Product Used in Wind Power(2021年08月18日)

chenzhuisolator — 2021-08-11T10:02:42+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-wind-power.html

Wind energy is a promising clean energy source. Wind turbine is the main power mainly equipment of wind farm, which converts wind energy into mechanical energy, and converts mechanical energy into electrical energy.
The large and high-altitude operation of the fan is destined to be difficult to operate in the infrastructure and maintenance, and the main power supply, process control, network a communication of the fan equipment, the field equipment needs high-level anti-surge shock and safety protection, and improves the reliability and availability of the safety automation system and equipment.
CHENZHU provides all kinds of high-quality signals, power SPD, signal conditioner, isolated barriers, safety relays, power transmitters and other safety interface products. They ensure that the main control system of wind turbines in the harsh lightning, electromagnetic pulses, electrical parameters changes, such as the case of equipment power supply and signal transmission can be long-term safe and reliable work.

Interface Product Used in Thermal Power(2021年08月17日)

chenzhuisolator — 2021-08-11T10:02:16+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-thermal-power.html

In most cases, steam-driven turbines convert heat into mechanical energy, which is used as the middle of electrical energy. Water is heated, turned into steam, and drives steam turbines, which drive generators. After the steam passes through the turbine, it condenses in the condenser and then circulates to the heated place.

As one of intrinsic safety barrier manufacturers, CHENZHU provides you with a complete set of anti-jamming, anti-surge port protection solutions.

Chenzhu provides reliable products and quality services for the thermal power industry automation safety DCS systems by the long-term product stability, reliability and experienced technical support.

Interface Product Used in Gas(2021年08月13日)

chenzhuisolator — 2021-08-11T10:01:49+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-gas.html

As one of the most professional intrinsic safety barrier manufacturers, CHENZHU supports you with a wide range of industrial interface products for natural gas processing and refining.

The following pictures are provided by some of our customers or collected by our company. If you have any need, please contact us as soon as possible.

Interface Product Used in Chemical(2021年08月12日)

chenzhuisolator — 2021-08-11T10:01:15+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-chemical.html

As we all know, chemical enterprises belong to high-risk enterprises, in the production and operation of easy to explode and other major accidents. Explosions occur when the following three conditions are met at the scene: explosive substances, oxygen, detonating sources, such as sparks of sufficient energy, or surface temperatures of objects high enough.

CHENZHU designs an intrinsic isolated barrier that is based on the principle of controlling the detonation source. The products of CHENZHU's safety automation system are applied in some chemical industries.

If you are interested in automation safety products, you can contact us for more cooperation detail.

Interface Product Used in Petrochemical(2021年08月11日)

chenzhuisolator — 2021-08-11T10:00:50+0900

https://www.chenzhuisolator.com/automation-safety-interface-product-petrochemical.html

Safety is a primary focus in the petrochemical industry wherein different process steps, such as cracking, condensation, or distillation, the respective intermediate or finished products are manufactured under defined pressure and temperature conditions.

As an instrument maintainer of instrument control systems, CHENZHU's intrinsic isolated barrier receives and processes signals from hazardous areas and transmits them to safe areas or hazardous areas after processing safety signals. The barrier is a typical product of the safety automation system.

As shown in the picture, the construction and working of the offshore oil platform are huge and onerous. Frankly, though the barrier is small, it plays an important role in the whole system.