What does the hardware of the PLC control system consist of?

The hardware of the PLC control system consists of the following parts: CPU: executes program instructions and controls the operation of the system. Input module: receives the signal from the sensor and converts it into a digital signal. Output module: Converts the digital signal of the CPU into a physical signal. I/O card holder: connects input and output modules. Power module: Provides power. Programming interface: connect to programmer or computer. Communication module: communicate with other devices. Extension modules: enhance system functions.

The hardware of the PLC control system mainly consists of the following parts:

1. Central Processing Unit (CPU)

• The core of the system executes program instructions and controls the operation of the entire system.

2. The input module

• is responsible for receiving signals from sensors or other devices and converting analog or digital signals into numbers that the CPU can process Signal.

3. The output module

• is responsible for sending control signals to actuators or other devices and converting the digital signals of the CPU into physical signals (such as Voltage and current).

4. Input/Output (I/O) Card Rack

• Provides a bus that connects input and output modules to the CPU.

5. The power module

• provides stable power supply for the system.

6. Programming interface

• is used to connect a programmer or a personal computer to load, modify and monitor PLC programs.

7. Communication module

• Allows PLC to communicate with other devices (such as human-machine interface, network switch).

8. Extension modules

• enhance the functionality of the system, such as adding more input/output points or special functions (such as analog module, motion control module).

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