The Mitsubishi FX3U‑128M is a high‑performance compact PLC base unit from MELSEC‑F FX3U series. It acts as the central logic controller for automated machinery, executing ladder‑logic programs to collect sensor signals, process logic, drive actuators, and coordinate whole‑machine motion & communication. Built‑in 128 I/O (64‑point DC24V inputs + 64‑point outputs), AC 100‑240V wide‑range power supply. Users can expand extra I/O, analog, motion and communication modules to build small‑to‑medium automation control systems for OEM machines and production lines.
| Item | Parameter |
|---|---|
| Model | FX3U‑128M Base Unit |
| Power Supply | AC 100‑240V, 50/60Hz |
| Built‑in Input | 64 points, DC 24V (Sink / Source compatible) |
| Built‑in Output | 64 points (Relay / Transistor optional) |
| Total Built‑in I/O | 128 points |
| Max Local I/O | 256 points; Max Local+Remote I/O:384 points |
| Program Memory | 64K Steps RAM, optional memory cassette |
| Basic Instruction Speed | 65 ns per LD instruction |
| Communication Port | RS‑422 built‑in; expandable Modbus / CC‑Link / Ethernet |
| Mounting | DIN‑rail 35mm |
| Protection Class | IP10 (PLC cabinet installation) |
| Ambient Temperature | 0 ~ +55℃ |
| Dimension (W×H×D) | 350 × 90 × 86 mm |
| Unit Weight | 1.8 kg/pc |
| Certification | CE, UL |
Main Application Industries: