The Mitsubishi Electric FX3U-32MR-DS PLC CPU Unit is a 32-point digital I/O controller for DIN-rail mounting, featuring 16 digital inputs (24 V DC, sink/source) and 16 relay outputs (about 2 A per point). It runs on 24 V DC power and offers 64K steps of program memory (RAM) with a processing speed of roughly 65 ns per basic instruction, plus a built-in RS-422 port for serial communications. Expansion supports up to 256 local I/O points or 384 with remote I/O, and the unit draws about 30 W. Operating temperature range is 0 to 55 C with storage from -20 to 75 C, and protection class is IP10–IP20. Common replacements include Mitsubishi FX3U-32MR/ES-A.
