With the rapid development of Internet technology, industrial Ethernet plays an important role in the field of industrial communication. In the entire industrial communication industry, industrial Ethernet switches have very important functions as key communication equipment. So, what is an industrial Ethernet switch and what are its features?
An introduction to the concept of an Industrial Ethernet switch.
An industrial-grade Ethernet switch is a device used at the data link layer, which is a switch that transmits data based on Ethernet. This switch uses a 48-bit (i.e., 6-byte) physical address (i.e., MAC address) to communicate. When a broadcast frame is received, it sends the frame to all ports except the receive port. When a unicast frame is received, the destination address of the frame is checked first and matched with its own MAC address table. If there are entries that match the destination address, the ** operation is performed;If no matching address exists, a flood operation occurs, i.e., the frame is broadcast. After broadcasting, if there is no host MAC address that is the same as the destination MAC address of the frame, the frame is discarded. If a matching host exists, the MAC address of the host is automatically added to its own MAC address table.
The role of an industrial-grade Ethernet switch is to divide the collision domain into different ports, so that each port is a collision domain independently. When a port receives a large amount of data to be sent, it first stores the data to be sent in a register and sends it out at the appropriate time. The use of Ethernet switches is very common and can be used in a wide range of applications, both in small and large LANs. Industrial-grade Ethernet switches have many advantages such as stable performance, complete grades, and first-class advantages, so they are widely used in the application field. In addition, the port rate and operation mode of Ethernet switches can vary. For example, it can provide different bandwidths of 10M, 100M, and 1000M, and can also support half-duplex, full-duplex, and adaptive working methods.
Key features of Industrial Ethernet switches.
1. Xi: The Ethernet switch will detect the MAC addresses of the devices connected to each port, and establish a mapping relationship between these addresses and the corresponding ports and store them in the MAC address table of the switch.
2. Filtering: When the destination address of a frame of data corresponds to the MAC address table, it will be sent to the port connected to the destination node, not all ports.
3. Solve the loop problem: When there are redundant loops in the switch, the Ethernet switch uses the spanning tree protocol to avoid the loop, and at the same time allows the existence of alternate paths.
Industrial Ethernet switch is an Ethernet switching device designed for the field of industrial control, and is one of the main communication standards in the field of industrial control. Industrial Ethernet switches have a wide range of applications and can play an important role in road traffic control automation, building automation control systems, oilfield control automation and other fields.
Industrial-grade Ethernet switches are typically designed to meet the following requirements: industrial-grade wide-temperature design, Class 4 EMC design, redundant AC and DC power inputs, and typically rugged PCB boards.
The environment at an industrial site is harsher than usual. In terms of vibration, humidity and temperature, industrial sites are harsher than usual. Ordinary switches are not designed to cope with the current situation in industrial environments. Ordinary switches cannot work in harsh environments for a long time, and are often prone to failure, which increases maintenance costs. For this reason, commercial switches are generally not recommended for use in industrial environments. In order to be able to use the switch in this harsh environment, we have produced industrial-grade switches that can adapt to this environment. Industrial-grade switches provide reliability, such as power failures, port interruptions, etc., through relay output alarms, redundant dual DC power inputs, active circuit protection, and over-voltage and under-voltage automatic circuit break protection.