Role and Business Opportunities of Industrial Switches in Metro System

Industrial Switches are widely used. In terms of industrial applications, they are mainly used in: coal mine safety, rail transit, factory automation, water treatment systems, urban security, etc. Metros will be built in larger cities in my country, because subways are a powerful tool to relieve traffic congestion. At present, there are many cities in my country such as Beijing, Shanghai, Guangzhou, Shenzhen, Wuhan, Nanjing, Chengdu, Xi'an, Chongqing, Shenyang, Tianjin and so on. The rail transit has been put into operation, and the urban rail transit is in a period of rapid development. Among them, the integrated monitoring system, as an important system in urban rail transit, also plays a key role. A brief analysis is made on the important hardware equipment-industrial switch that forms the backbone network of the integrated monitoring system.

Application networking mode of industrial switches

Industrial switches are specially designed to meet the needs of flexible industrial applications and provide a cost-effective industrial Ethernet communication solution. And its networking mode is more focused on loop design. There are single-ring and multi-ring differences in the ring, and there are also private ring protocols designed by various manufacturers on the basis of STP and RSTP, such as RingOn, RingOpen open-loop, FRP ring, turbo ring and so on. The integrated monitoring system is independently networked, and an industrial Ethernet is formed independently by using the optical fiber provided by the integrated monitoring system's own industrial switch and communication system.

Industrial switch

An industrial switch is an Ethernet device that meets the needs of industrial sites, is technically compatible with commercial Ethernet switches, and has higher requirements for real-time communication, security, stability, reliability, and environmental adaptability than commercial Ethernet switches. .

Comparison of industrial switches and civil switches: The switching functions are basically the same, but there are some differences. First of all, in terms of design and selection of components, the performance and applicability of the product can better meet the needs of industrial sites; secondly, it is more flexible in module expansion, and there are a variety of optoelectronic interfaces to choose from; It can meet the needs of industrial sites in terms of material selection, reliability, interoperability, applicability and real-time performance, product strength, anti-interference and intrinsic stability. In addition, industrial switch PCB boards are generally treated with "three defenses". We can determine the necessity of choosing industrial Ethernet switches in the industrial field from the following aspects. From a long-term perspective, the MTBF of general civil switches is 3 to 5 years, while the MTBF of industrial switches can be as high as 15 to 50 years, and the reliability is much higher than that of civil switches; in addition, industrial switches themselves have a good ring network. The superior conditions such as formation and self-checking only occupy the optical fiber provided by the communication system, which greatly improves the flexibility, stability and convenience of future debugging of the entire system.

At present, when building a comprehensive monitoring system in most cities, it is recommended that the comprehensive monitoring use the optical fiber provided by the communication system and use the industrial switch hardware to form an independent network.

In addition, in terms of subway business opportunities, a total of more than 30 cities in my country have built rail transit, and 39 cities are building rail transit. After that, the subway market will increase every year. The business opportunities of industrial switches in the subway are mainly in the PIS (passenger information) system, AFC (automatic fare collection) system and ISCS (integrated monitoring) system. It is mainly used in the central control room, the dedicated communication channel of the subway, the station monitoring center and the information terminal on the station. Industry insiders estimate that the sales of industrial switches on each subway line is about 10 million (PIS 3 million, AFC 3 million, ISCS and other systems 4 million), and the total sales of subway industrial switch suppliers can reach up to 1 each year. 100 million. In addition to subways, intercity railways are also developing rapidly. In the field of high-speed railways, industrial switches are not only used in new high-speed railway network parts and traditional network reconstruction, but also in railway signal control, train marshalling, railway power monitoring, and AFC systems.