PLC(programmablelogic controller), programmable control cabinet

PLC control cabinet has the function of controlling motor, valve and other equipment, and has the protection function of equipment overload, short circuit and lack of phase. It has compact structure, stable operation and powerful function. It can be flexibly designed and controlled according to the actual scale, which can realize single cabinet automatic control, and multi-cabinet control system through industrial Ethernet or industrial fieldbus network. PLC control cabinet can adapt to various scales of industrial automation control occasions, widely used in electric power, metallurgy, environmental protection, chemical, paper and other industries.

PLC control cabinet can complete equipment automation and process automation control, with powerful network functions. Stable performance, scalability, anti-interference ability and other characteristics, is the core and soul of modern industry. The control cabinet can be tailored according to user needs to meet user needs, and can be matched with the man-machine interface touch screen to achieve easy operation, and can also achieve networking functions with DCS and upper computer through TCP/IP, MODBUS, PROFIBUS-DP and other communication protocols.

Typical applications: constant pressure water supply, sewage treatment, fan pump, air compressor, mechanical equipment, boiler, heating equipment and so on.

structure

The basic composition of PLC control cabinet includes the following parts:

1, the main power switch

A total power switch is one of the indispensable components of the control cabinet, which provides power configuration for each part of the PLC branch.

2, PLC module

PLC module is the core part of the entire control cabinet, according to the process requirements, determine whether the project is a small system, or a medium-sized system, or a large system, select the corresponding module category.

3, DC24V power supply

General PLC will come with DC24V power supply, according to the need to determine whether the external switching power supply, and the power of the switching power supply to meet the design requirements.

4, intermediate relay

PLC output contact capacity is relatively small, can not directly drive the larger load, then you need to convert the intermediate relay, at the same time, the intermediate relay also plays an isolation role between the load and the PLC output module.

5. Wiring terminals

Terminals are the connection points between the control cabinet and external devices. The capacity and number of terminals are determined based on the load.

In short, these are the most basic needs of the control cabinet, PLC control cabinet is a non-standard production, is designed and produced according to the process requirements.