Mitsubishi Electric Corporation FX3U-48MR/DS PLC Module

The FX3U-48MR/DS is a compact Mitsubishi FX3U PLC module that provides discrete I/O control for medium‑complexity automation tasks. It runs on 24 VDC power and offers 48 I/O points (24 inputs, 24 outputs) with 24 VDC input compatibility for sink/source configurations and transistor outputs for reliable switching. The unit carries on‑board program memory for the user’s logic and can be expanded via FX3U expansion I/O modules to extend I/O as system needs grow. For communication, it supports optional serial or Ethernet interfaces through expansion modules, and it features LEDs that indicate power, run, error, and I/O status. Mounting is versatile, supporting DIN‑rail or panel installation, and it is designed for industrial temperature ranges typical of factory automation. This PLC is commonly used in manufacturing and process automation environments requiring dependable discrete control, such as packaging machines, conveyors, material handling equipment, assembly lines, and HVAC control where 24 VDC signaling is standard. Common replacements include the FX3U-64MR/DS, Omron CP1H-X40DR-A, and Allen-Bradley MicroLogix 1400 series.