What are the standards for selecting industrial switches
Industrial switch used in industrial control industry Ethernet switch machines and equipment, because of the use of network specifications, its good open, wide application and high quality and low price, the application of transparent and unified TCP/IP protocol, Ethernet interface has become the main wireless communication module in industrial control industry. Industrial switches have carrier-grade performance features and can withstand harsh operating environments. A variety of products, switch configuration is convenient, can meet a variety of industrial use requirements. The product is designed with a wide temperature, enclosure protection rating of IP30 or higher, and supports both standard and proprietary ring network data redundancy protocols. Today let's talk about the selection of industrial switch standards.
1. What are the standards for selecting industrial switches
1. Consideration of office environment
Operating temperature range, EMC, electromagnetic compatibility, installation, and power supply mode. In the parameter description of the product, there should be a detailed description of the operating temperature range, electromagnetic compatibility, and accompanied by proof of relevant access standards.
Industrial Ethernet machines and equipment differ from commercial Ethernet interface machines and equipment. Generally, the compact design and guide rail installation are more suitable for on-the-spot cabinet installation. It is better to choose the switch equipment without fan design.
To prevent unnecessary damage caused by faults, after selecting reliable and stable hardware, pay attention to all kinds of unnecessary ways that switches can provide, as well as fast fault detection and recovery.
2. Network Management type or non-network management type
If the network is relatively simple, plug and play switches can be used. If the network management type will be adopted for future maintenance convenience, only network management type switch can ensure the ring topology connection.
Compatibility: Industrial Ethernet switches and other industrial Ethernet components should be able to communicate using the standard TCP/IP protocol. Under no circumstances should there be any incompatibility between industrial Ethernet machine equipment and commercial Ethernet interface equipment. Corresponding to different industrial fieldbus processing schemes, industrial Ethernet machines and equipment should have corresponding capabilities compatible with them.
3、must meet the relevant industrial switch standards
For example, the ship's switchboard should meet the specifications of the ship's structure; If there is a risk of application, it should meet the corresponding certification standards, urban rail and highway and other transportation industries also have their own norms.
Security: Because of the open nature of wireless network, we must take network information security into account in the process of establishing automation technology network. When using the facilities, you should select a switch with the VLAN function to facilitate network function division.
Vlans can be used to isolate devices on a network based on functions, preventing malicious damage or misoperations.
In addition, users can use the 802.1x function of the switch to authorize the machines and devices that must access the network to distinguish legitimate users from unauthorized users.
4、industrial switch performance considerations
When purchasing a network switch, in addition to meeting the basic standard requirements suggested by RFC2544, namely throughput, rate, and network packet loss, some additional indexes must be met as the user's business process increases and the application goes deeper. For example, number of MAC addresses, default route capacity (Layer 3 switch), number of ACLs, LSP capacity, and number of VPNS supported.
In different application environments, the system can tolerate the reaction time and jitter is very different. The message format in the automated Internet has a delay every time it is forwarded from one machine device to another machine device.
Therefore, the first thing to consider when selecting an industrial Ethernet switch is the port bandwidth of the network switch for Ethernet frame forwarding.
In standard factory automation control systems, the system can tolerate a response time of less than 10 milliseconds. In order to control the accumulation rate of message formats from the top to the bottom of the system, when selecting a network switch, note that the port rate of the switch should not exceed 10 microseconds.
This is all about the selection of industrial switch standards, thank you for reading.
