Mitsubishi Electric A1SJ71UC24-R4 PLC Communication Module

The Mitsubishi Electric A1SJ71UC24-R4 PLC communication module provides high-speed serial connectivity between Mitsubishi MELSEC A/Q/F series PLCs and external devices such as HMIs, PCs, drives, and other controllers. It supports configurable RS-232C, RS-422, and RS-485 protocols up to 115.2 kbps, with DB-9 or terminal block connectors depending on platform. Designed for MELSEC A/Q/F rack or panel installations, it enables serial data exchange, remote I/O access, and diagnostics to support remote monitoring, programming access, and device interoperability in factory and process automation. Mounting is via PLC rack or panel, powered from the PLC backplane or an auxiliary supply, and it includes communication status LEDs to indicate link health.