Industrial Ethernet switches are widely used in industry, such as rail transit, network security protection systems, financial systems and other industries, which is now now one of the main network communications equipment.
So how do we choose the switch when using the switch? Need to choose according to those aspects? Shenzhen Zhenxin communications technology company for everyone under the reference:
First of all, there are many types of switches: such as industrial Ethernet switches, POE switches, core layer switches, aggregation layer switches and so on. They each have a different use. Ordinary switches are generally used in small local area networks, or enterprise-class. High-end switchboard applications in the high-end WAN security protection network, can effectively prevent the virus invasion, hacker attacks and so on.
Second: switch power supply line POE switches, ring network switches, fool switches.
Communication certainty
First, the Ethernet communication rate from 10M, 100M to today's 1000M, 10G, in the case of the same data throughput, the increase in communication rate means that the network load reduction and network transmission delay reduction, which means that Network collision probability greatly decreased.
Second, the use of star network topology, the switch will be divided into a number of network segments. Ethernet switch has the function of data storage and forwarding, so that the input and output data frames between the ports can be buffered and no collision occurs. At the same time, the switch can also filter the data transmitted on the network so that each network The transmission of data between nodes in the segment is limited to the local network segment, without going through the backbone network, nor the bandwidth of other network segments, thus reducing the network load of all network segments and backbone networks.
Again, full-duplex communication makes the two pairs of twisted pair (or two fibers) at the same time to receive and send message frames, it will not conflict.
Thus, the use of switched hubs and full-duplex communication can make the collision domain on the network no longer exist (full-duplex communication), or the probability of collision is greatly reduced (half-duplex), and thus the Ethernet communication " Sexual "and real-time has been greatly improved.
Communication stability and reliability
Another major problem with Ethernet entering the field of industrial control is that the connectors, hubs, repeaters, USB converters, and cables used in the field of industrial control are designed for the field of OA and are less resistant to interference and do not meet industrial Harsh environment requirements, do not have the intrinsically safe nature and to the performance of the field instrument power supply.
With the development of network technology, the above problems are being solved quickly. In order to solve the uninterrupted industrial applications, in extreme conditions, the network can work stably. Shenzhen
City Zhenxin Communication Co., Ltd. independent research and development to produce industrial Ethernet switch products, to provide AC and DC voltage input positive and negative protection function to prevent burning equipment, its operating temperature can reach -40-80 °, support the industry standard card-type installation And wall-mounted, high-performance Ethernet switch technology to ensure that Ethernet communication speed
In addition, in practical applications, the backbone network can be used fiber transmission, field devices can be connected to shielded twisted pair, for important network segment can also use redundant network technology to improve the network's anti-jamming capability and reliability
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