Schneider Electric’s Modicon 1646-4 Serial Interface Module adds a dedicated serial communications interface to compatible Modicon PLCs, configured for 9600 baud. Identified as model 1646-4, it provides the required hardware link for serial data exchange between the controller and peripheral devices in the Modicon family. Use this module when a 9600‑baud serial connection is needed within Schneider Electric Modicon control systems.
