PLC control cabinet is a very important part of industrial automation control system, and the type and number of components vary depending on the model and function.
Here are a few common main components of PLC control cabinets:
1.PLC controller: PLC controller is the core component of PLC control cabinet, which is responsible for executing the user's program, processing the input signal and outputting the control signal.
2.Power module: The power module provides a stable DC power supply for the PLC control cabinet, generally using a switching power supply or a linear power supply.
3.Input and output module: The input and output module is a bridge between the PLC control cabinet and external equipment for signal exchange, including digital input and output modules, analog input and output modules, etc.
4.Network communication module: The network communication module is used to realize the data communication between the PLC control cabinet and the host computer or other equipment, such as Ethernet module, serial communication module, etc.
5.Human-machine interface: The human-machine interface is a device for the operator to interact with the PLC control cabinet, which can display the operation status and fault information of the PLC control cabinet, and can also accept the user's input instructions.
6.Mechanical limit switch: Mechanical limit switch is a position switch, which is used to detect the position of mechanical moving parts, convert the position signal into an electrical signal and transmit it to the PLC controller.
7.Proximity Switch: Proximity switch is a non-contact position detection element, when the moving part approaches the sensing surface, the proximity switch will send an electrical signal to the PLC controller.
8.Encoder: The encoder is an angle detection element, which is used to detect the angular position of the rotating parts of the machine, and converts the angle signal into an electrical signal and transmits it to the PLC controller.
9.Temperature sensor: The temperature sensor is used to detect the temperature parameters in the industrial production process, such as thermal resistance, thermocouple, etc., and convert the temperature signal into an electrical signal and transmit it to the PLC controller.
10.Pressure sensor: The pressure sensor is used to detect the pressure parameters in the industrial production process, such as pressure gauges, pressure transmitters, etc., and convert the pressure signal into an electrical signal and transmit it to the PLC controller.
But no matter what kind of PLC control cabinet, its components meet the following common characteristics:
1.High reliability: The components in the PLC control cabinet are usually industrial-grade chips and components that have been rigorously screened and tested to ensure that they can operate stably in harsh industrial environments.
2.Strong adaptability: The components of the PLC control cabinet can adapt to a variety of different working environments, such as high temperature, low temperature, strong electromagnetic field, etc.
3.Easy maintenance: The components of PLC control cabinets are usually modular in design, making them easy to replace and repair.
4.Strong anti-interference ability: The components of the PLC control cabinet can effectively resist external interference, such as power supply interference, signal interference, etc. The above are only the main components of the common PLC control cabinet, in fact, there are some other auxiliary components and functional modules, such as timers, counters, PID controllers, frequency converters, etc. Different PLC control cabinet models and functional requirements lead to different types and quantities of components.