Mitsubishi A1SH42-S1 Digital I/O Module for A Series

The Mitsubishi A1SH42-S1 (A1SH42-S1) is a combined digital input and output module designed for Mitsubishi A Series programmable logic controller systems. Serving as an essential expansion and interface unit, this module facilitates direct communication between the central processing unit and field automation devices, sensors, switches, and actuators. This mixed digital I/O unit provides a total capacity of 60 input and output points, configured with 36 digital inputs rated for 24 V DC and 24 digital outputs rated for 24 V DC. It offers equivalent operational functionality to FX1N60MTD configurations, enabling high-density signal distribution within a compact controller footprint. Operating reliably within industrial automation setups, the module processes incoming binary status signals from limit switches, proximity detectors, and push buttons, while delivering control signals to relays, indicator lights, and solenoids. Typical applications include manufacturing assembly lines, packaging machinery, material handling systems, and general industrial maintenance replacements where dependable discrete control is required.