Match each PLC hardware item to it's main function

It is used to enter the desired program into the memory of the processor.

It supplies DC power to other modules

processor module $($CPU$)$

It accepts input data from sensing devices, executes

$\frac{1}{O}$ modules

the stored user program from memory, and sends

programming device

appropriate output

commands to control

power supply module

devices.

They form the interface by which field devices are connected to the controller.