RS422 cable for GT21 HMI link
The Mitsubishi GT21-C200R4-8P5 is an RS422 communication cable used to connect a GT21-series HMI to a controller or other RS422 device. It is the dedicated link cable for the GT21 family, carrying the serial signal between the HMI port and the target equipment.
Serial link for HMI integration
RS422 is a differential serial standard that supports longer cable runs and higher noise immunity than RS232. In a GT21 HMI installation, this cable handles the communication between the operator interface and the downstream PLC, drive, or controller over a balanced pair.