output module plc,input module plc

plc digital input output module each play any role in the PLC control system
Digital input module is an external control signal or field detection signal processing module to the PLC CPU, an external signal is generally button, proximity switches, limit switches, plc output module is based on the signal processing logic and internal logic programming input module taken into the , the results of treatment before, switch output signal is output by the high and low output module, to drive external relays, contactors, lights, solenoid valves and other components, thereby enabling the external device corresponding action