Mitsubishi Electric A1SX40-S2 Input Unit PLC Module

The Mitsubishi Electric A1SX40-S2 Input Unit PLC Module is a digital input module for Mitsubishi PLC systems. It operates at 24 V DC and draws 7 mA, enabling low-power, reliable sensing in control panels. As part of the A1SX family, this module provides a dedicated interface to external sensors and switches, feeding binary signals to the PLC for processing and control decisions. This input unit helps expand a Mitsubishi controller’s sensing capability, simplifying field wiring by using standard 24 V DC power for connected devices. Typical applications include reading pushbuttons, limit switches, and other binary sensors in manufacturing automation, packaging lines, or machine monitoring setups, where timely, discrete on/off signals are required for sequencing, interlocks, and safety logic. The model name A1SX40-S2 identifies it as a specific Mitsubishi Electric input module within the A1SX series, ensuring it is designed to integrate with compatible Mitsubishi controllers and software toolchains. With this module, panels can reliably collect digital input data and feed it into the PLC program without requiring analog signaling or complex wiring schemes.