Defined PLC controller

programmable logic controller initially only circuit logic control function, so named as a programmable logic controller, and later with the continuous development of these original functions have simple computer module including logic control, timing control, analog control , multi-machine communications, and many other features, the name was changed to the plc controller. PLC controller mainly refers to digital computing operation of the electronic system programmable logic controller for controlling the mechanical production process.

Programmable Controllers and IO Modules What are the similarities and different

programmable logic controller, ie PLC, can be considered a microcontroller or CPU + interface circuitry. Under normal circumstances, the microcontroller, CPU, including the IO module plc are just low-level output signal of a weak signal, you want to direct drive packed load is generally not possible, because their output current is too small, but because the PLC plus the interface circuit, you can put a weak signal amplification signal can directly drive high current take-load, general load current can be achieved PLC 1A.

The role of the PLC input and output module

PLC input module is used for receiving, the various parameters of production process. (start stop input) output module plc  ,input module plc

The PLC output module is used to send can be obtained after computing the controller programming information, programmable logic controller manufacturer  and implementing agencies through the outside to complete all kinds of industrial field control. (the output)

1, have good anti disturbance ability.
2, can meet the requirements of all kinds of industry scene signal