CPU Module for 80-Point Relay Output Systems
The Mitsubishi FX5U-80MR/DS is a CPU module from the MELSEC iQ-F series with 80 total I/O points — 40 inputs at 24 V DC (sink) and 40 relay outputs. It uses a screw terminal block for field wiring, keeping your existing panel terminations consistent.
Comparison with FX5UC-64MT/D – What Changes
If your BOM was written around the FX5UC-64MT/D, note that the FX5U-80MR/DS is a different form factor — it uses a screw terminal block instead of a connector, and its 40 transistor outputs are replaced by 40 relay outputs. The transistor variant is usually for high-speed or DC loads; relay outputs handle AC/DC up to the contact rating but are slower. Panel wiring will need re-termination; the two modules are not drop-in interchangeable.