Typical applications: water treatment, constant pressure water supply, air compressor, fan pump, air conditioner, port machinery, machine tool, boiler, paper machine, food machinery, etc. Overview of PLC control cabinet
Components of PLC control cabinet
1. Air switch: a general air switch, which is the power control of the whole cabinet. I believe that every cabinet should have one thing.
2. PLC: This should be selected according to the needs of the project. For example, if the project is small, it can be directly an integrated PLC, but if the project is large, it may need module, card type, and redundancy (that is, two sets are used alternately).
3. 24VDC power supply: a 24VDC switching power supply. Most PLCs have their own 24VDC power supply. Whether to use this switching power supply depends on whether it is really necessary.
4. Relay: Generally, PLC can send commands directly to the control circuit, but it may also be transferred by the relay first. For example, if the output port of your PLC is powered by 24VDC, but the node required to be supplied by the PLC in the drawing in your control circuit is 220VAC, you can add a relay to the PLC output port, that is, the relay acts when the command is sent, but then connect the node of the control circuit to the normally open or normally closed point of the relay. Select whether to use the relay according to the situation.
5. Terminal block: This must be the thing of every cabinet, and can be configured according to the number of signals
The PLC control cabinet can complete equipment automation and process automation control, and its network function, stable performance, scalability, strong anti-interference and other characteristics, is the core and soul of modern industry. PLC control cabinet, frequency conversion cabinet, etc. can be customized according to user requirements to meet user requirements, and can be matched with human-machine interface touch screen to achieve easy operation. The equipment can transmit data with the communication protocols such as modbus and profibus of the upper computer of the dcs bus; Control and monitoring realized by industrial personal computer and Ethernet.
PLC application field
Typical applications: water treatment, constant pressure water supply, air compressor, fan pump, air conditioner, port machinery, machine tool, boiler, paper machine, food machinery, etc.
Overview of PLC control cabinet
The PLC integrated control cabinet has protection functions such as overload, short circuit and phase loss protection. It has compact structure, stable operation and complete functions. It can be combined according to the size of the actual control scale, which can realize the automatic control of a single cabinet, or the formation of a distributed (DSC) control system through industrial Ethernet or industrial field bus network for multiple cabinets. PLC control cabinet can adapt to industrial automation control occasions of various sizes. It is widely used in electric power, metallurgy, chemical industry, papermaking, sewage treatment and other industries.
RELATED INFORMATION
Basic knowledge of PLC control cabinet
2022-10-18