Siemens SIMATIC CP340 RS422/485 communication module for the S7-300 PLC family, order number 6ES7 340-1CH00-0AE0. It provides a serial RS-422/RS-485 interface via a 15-pin Sub-D connector, configurable for point-to-point communication with external devices or other PLCs. As a CP (Communication Processor) module, it slots into the S7-300 rack and is configured through STEP 7, expanding the PLC's data exchange capabilities over RS-422/RS-485 networks.
