The Mitsubishi Electric A1SX20 AC digital input module is designed for MELSEC‑A PLC systems, providing a field‑level interface to read external AC signals into the controller. It accepts AC input signals from devices such as sensors, switches, or pushbuttons and presents them as digital inputs to the MELSEC‑A CPU for logic and control tasks. Compatible with Mitsubishi Electric automation setups, the A1SX20 helps expand input capability in automation panels and machinery where reliable AC input monitoring is required.
