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What is a BNC Interface(2021年04月28日)

huasnet — 2021-04-28T16:03:43+0900

https://www.huasnet.com/ethernet-extender/

Short for the bayonet nut connector, the BNC interface is a connector for coaxial cables. The BNC interface (a basic NIC) is a 10BASE-2 connector also known as the coaxial thin cable connector, which can isolate the video input signal and depress the interference between the signals. Besides, its signal bandwidth is larger than that of the ordinary 15-pin D-type interface to achieve a better signal response effect. The network card of the BNC interface shall be used in match with the Ethernet over BNC or the Token Ring whose transmission medium is the thin coaxial cable. The reason for the rare Ethernet over BNC chiefly is that networks seldom adopt thin coaxial cables as the transmission medium. Now, the dominant practice is the video signal transmission of monitors in security industry.

The BNC interface has never been out of date for the coax is a shielded cable advantaged with a long transmission distance and an excellent signal stability. At present, it is still widely used in the communication system. Examples are that the E1 interface in network equipment is connected by two coaxial cables with BNC interface and that audio and video signals transmission tasks are performed by the coax in advanced monitors and audio equipment.

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, Fiber Optic Switch, gigabit fiber switch and so on. Want to know more? Please contact us.

International Standard -- 802.3at(2021年04月28日)

huasnet — 2021-04-28T16:03:21+0900

https://www.huasnet.com/poe-solution/

IEEE poe 802.3at appeared in response to the needs of high-power terminals. On the basis of 802.3af compatibility, it provides greater power supply requirements to meet new needs. PSE terminal provides 50 ~ 57V voltage, about 600mA DC power supply. Each port shall be able to provide at least 30W of power, and after 100m Cat-5 cable, at least 25.5w of power should be received by PD terminal.

In order to comply with specification of IEEE poe 802.3at, PoE power consumption on the PD is limited to 12.95w. This is enough to meet the need of the traditional IP phones and webcams. However, with the emergence of dual band access, video phone, PTZ video monitoring system and other high-power applications, 13W power supply obviously can not meet the demand. This limits the application of poe 802.3 at. To overcome the limitation of PoE on power budget and apply it to new applications, IEEE set up a new task group. Our purpose is to seek for a way to improve the power limit of this international power standard. In order to evaluate the possibility of the implementation of IEEE802.3at technically and economically, the IEEE802.3 working group established the research group of PoEPlus in November 2004. Later, the plan of establishing IEEE 802.3at investigation committee was approved in July 2005. The new standard is Power-over-Ethernet Plus (PoEP) IEEE 802.3at. It defines a device with a power requirement higher than 12.95w as Class 4 (this level is described in IEEE 802.3af, but it will be used in the future), which can extend the power level to 25W or higher.

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, Fiber Optic Switch, 10 100 mbps switch and so on. Want to know more? Please contact us.

What is Poe 802.3 at(2021年04月28日)

huasnet — 2021-04-28T16:02:47+0900

https://www.huasnet.com/poe-solution/

IEEE poe 802. 3 at: POE (Power over Ethernet) is a kind of LAN technology, which can provide DC power to the powered device through twisted pair. It has been widely used in enterprises and industrial applications. According to statistics, in 2006, the Ethernet power supply delivery volume was 32 million ports. By 2011, the delivery volume will be increased to 145 million ports, with an annual growth rate of more than 30%. The standard adopted by Poe industry is IEEE 802.3af, which stipulates that power supply equipment can supply power to the powered device with power below 13W through Ethernet. This is enough to meet the need of the traditional IP phones and webcams. However, with the emergence of dual band access, video phone, PTZ video monitoring system and other high-power applications, 13W power supply obviously can not meet the demand. Therefore, IEEE began to develop a new PoE standard 802.3at (POE plus) in 2005 to improve the power that PoE can transmit.

Compared with 802.3af, PoE 802.3 at can output more than twice the power, and the output power of each port can be more than 30W. Therefore, the application field of PoE can be greatly expanded. Table 1 shows the comparison between 802.3af and 802.3at. Although 802.3ats has not been officially launched, manufacturers in the industry began to launch devices that meet the pre－IEEE802.3at standard.

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, fiber optic switch and so on. Want to know more? Please contact us.

Technical Development of Profinet Ethernet(2021年04月28日)

huasnet — 2021-04-28T16:02:25+0900

https://www.huasnet.com/ethernet-switch/

PROFINET, introduced by PROFIBUS international organization, is a new generation of automation bus standard based on Industrial Ethernet technology.

Profinet ethernet provides a complete network solution for the field of automation communication, including hot topics in the field of automation such as real-time Ethernet, motion control, distributed automation, fault security and network security. Moreover, as a cross vendor technology, it can be fully compatible with industrial Ethernet and existing field bus (such as PROFIBUS) technology to protect the existing investment.

In order to achieve the above communication function, the following three communication protocol levels are defined.

·TCP / IP is designed for PROFINET CBA and factory commissioning, and its response time is about 100ms.
·RT (real time) protocol is for the application of PROFINET CBA and PROFINET IO, and its response time is less than 10ms.
·IRT (isochronous real-time) communication protocol is designed for PROFINET IO communication of drive system, and its response time is less than 1ms.

The packet of PROFINET protocol can be recorded and displayed by the analysis tool of profinet ethernet. There are also some software that can interpret PROFINET data frames.

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, Fiber Optic Switch, 10g media converter and so on. Want to know more? Please contact us.

Features of Profinet Ethernet(2021年04月28日)

huasnet — 2021-04-28T16:01:20+0900

https://www.huasnet.com/ethernet-switch/

A PROFINET CBA system will include many automatic components. Components can be mechanical, electronic, or it's the IT variable, and components can be generated by standard programming tools. Components can be described by a PROFINET component description file in XML format. The planning tool loads these descriptions and establishes logical relationships between different components.

Profinet Ethernet supports tool call interface. Every equipment manufacturer can parameterize and diagnose field equipment with any software supporting TCI function without exiting the program.

Proximity identification and device replacement: all Profinet Ethernet will identify adjacent devices. Therefore, if the equipment fails, it can be replaced without additional tools and prior knowledge. With this information, the topology of the system can be clearly presented in an image way.

Parameter server: individual data can be loaded into the parameter server in a neutral way of the manufacturer (such as TCI), and the parameter server will automatically archive the parameters. When the device is replaced, the parameter server will automatically reload the relevant data.

Deterministic: PROFINET supports deterministic data transfer and can be used in high accuracy control tasks.

Redundancy: the concept of redundancy in PROFINET greatly improves the availability of the system.

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, Fiber Optic Switch, gigabit media converter and so on. Want to know more? Please contact us.

The Development Prospect of Profinet Industrial Ethernet(2021年04月28日)

huasnet — 2021-04-28T16:00:54+0900

https://www.huasnet.com/ethernet-switch/

In the new industrial era, the concepts of integration, digital factory, intelligent factory and industry 4.0 are constantly promoting the upgrading of the factory. The factory is making a attempt to realize automation, digitalization, intellectualization and humanization under the promotion of user demand. The foundation of digital enterprise is to collect the field data of the factory and the information of the bottom executive mechanism for the control layer. And then it provides reference for the enterprise management - this is the characteristics of big data in the factory. The digital enterprise must be based on the integrated network, so that factories can realize data exchange, providing continuous information flow. The core is the factory automation network. To achieve the goal of digital enterprise, a complete communication network is needed. The profinet industrial ethernet which is more flexible, more efficient and of higher performance perfectly meets this demand.

With time going on, profinet industrial ethernet has not only become an international standard, but also has been recognized nationally in recent years, and has become a recommended national standard, which is widely used in factory automation. From ERP to MES to TIA at the bottom layer, all aspects of automation can be run through with PROFINET, and a complete set of network solutions can be used to solve various needs of industrial field data transmission. PROFINET has broken through the barriers among the field level, the control level and the enterprise management level, and realized the vertical integration of the digital chemical plant. It can easily obtain the required data from each layer and transmit it to the occasion where they are needed.

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, Fiber Optic Switch, fast fiber converter and so on. Want to know more? Please contact us.

Future Oriented Industrial Ethernet Technology(2021年04月28日)

huasnet — 2021-04-28T15:58:32+0900

https://www.huasnet.com/ethernet-switch/

PROFINET is a future oriented industrial Ethernet Technology. It is hoped that more and more enterprises will explore the development of PROFINET technology, continue to optimize, innovate, and promote the application of profinet industrial ethernet in China.

In the traditional industrial field, the complex wiring structures of various hybrid networks are often accessible. With the increasing demand of users for communication and data acquisition, Ethernet system is becoming more and more popular, and its complexity is also rapidly increasing.

"Different from the traditional industrial Ethernet standard, in the system based on profinet industrial ethernet, we can transmit multiple data at the same time with one line." To simplify Ethernet wiring, manager Feng gave his solution: "through the division of data channels, different types of data can be transmitted on their own channels. Now, there's a growing demand for it. "

It is said that PROFINET can be divided into two types of real-time periodic communication with different performance. One is RT (real-time), which is mainly used for factory automation. There is no requirement for time synchronization in this kind of communication. Generally, the response time is only 5-10ms. The other communication is IRT (isochronous real-time). Guaranteed by embedded synchronous real-time switching chip, it is mainly used in occasions with strict time synchronization requirements, such as motion control, electronic gear, etc.

In addition to real-time communication, there is also a standard non real-time communication channel adopting TCP and UDP / IP protocols in PROFINET, which is generally used for device parameterization, configuration and reading diagnostic data. It can also connect to standard TCP / IP devices for open data communication. "The chips adopted by Siemens for PROFINET development now are of IRT function," said Manager Feng. However, if only software protocol stack is used for development, the real-time level can only reach the performance level of RT. "

Shenzhen Huashi Network Technology Co. Ltd. is one of industrial ethernet switch manufacturers. We provide Fiber Optic Media Converter, Fiber Optic Switch, fiber media converter and so on. Want to know more? Please contact us.