The Omron C500-LK203 is a rack-mount PLC communication module for the C500 series that provides bidirectional serial links between the PLC and external devices. Mounting Type: PLC rack mount; it supports serial communication via RS-232C, RS-422A, or RS-485 configurations through its serial interface ports, enabling data exchange with HMIs, computers, and peripheral equipment in factory automation, material handling, production lines, and process control. Power is supplied via the PLC backplane, LED status indicators monitor operation, and it supports Host Link or model-dependent custom protocols. Common replacements include Omron C500-LK201 and C200H-LK201.
