Introduction - If you have any usage issues, please Google them yourself
Realize a control by the PC software IO module. IO module control unit uses the relay, by the microcontroller (MCU) control relay open, pull. IO modules via RS232 serial port and PC connections, PC machine control software running on a PC, to provide control and display IO IO module relay module relay closed user interface. PC and IO modules can define their own communication protocol, but there are certain requirements must be such as to ensure the reliability of communications parity protection measures.