Product Description
The Mitsubishi FX5U-80M is a compact all-in-one CPU module in the MELSEC iQ-F Series of programmable logic controllers, integrating a power supply, CPU, and 80 I/O points (40 digital inputs, 40 digital outputs) in a single unit. It features 64K-step flash program memory, built-in Ethernet and RS-485 ports, high-speed counter functions, built-in analog I/O, SD card slot, and a high-speed instruction cycle time of 34 ns (LD instruction). The FX5U-80M base supports multiple output variants (relay, transistor sink, transistor source) and AC or DC power supply options, identified by the full suffix on the label (e.g., /ES, /DS, /ESS, /DSS). Programmed using GX Works3 software and compatible with the MELSEC iQ-F expansion ecosystem.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Mitsubishi Electric |
| Model / Part Number | FXSU-80M (see note: likely FX5U-80M) |
| Series / Platform | MELSEC iQ-F / FX5U |
| Product Type | PLC CPU Module (All-in-One) |
| Total I/O Points | 80 (40 Inputs + 40 Outputs) |
| Digital Inputs | 40 (24 VDC, Sink/Source) |
| Digital Outputs | 40 (Relay or Transistor — see label suffix) |
| Built-in Analog Inputs | 2 |
| Program Memory | 64K Steps (128 KBytes) Flash |
| Timers | 1024 points |
| Counters | 1024 points |
| Data Registers | 8000 points |
| File Registers | 32768 points |
| Device/Label Memory | 120 KBytes |
| Data Memory (Standard ROM) | 5 MBytes |
| SD/SDHC Memory Card (max) | 4 GB |
| Local I/O Points (Expandable) | 256 |
| Local + Remote I/O Points | 512 |
| Cycle Time — LD Instruction | 34 ns |
| Cycle Time — MOV Instruction | 34 ns |
| Power Supply (AC variants) | 100–240 VAC, 50/60 Hz |
| Power Supply (DC variants) | 24 VDC |
| Power Consumption (AC 80M) | 45 W (typical) |
| 5 VDC Power Supply Capacity | 1100 mA |
| 24 VDC Service Power Supply | 600 mA |
| Ethernet Port | 1 (Built-in) |
| RS-485 Port | 1 (Built-in) |
| High-Speed Counter | Built-in, up to 200 kpps |
| Positioning Axes | Up to 4 axes (built-in) |
| Programming Languages | Ladder (LD), Structured Text (ST), FBD, SFC |
| Engineering Software | GX Works3 |
| Dimensions W × H × D (mm) | 285 × 90 × 83 |
| Mounting Type | Panel Mount (DIN rail or screw) |
| Protection Class | IP10 |
| Certifications | UL, cUL, CE (EMC) |
| Battery Backup | Optional (non-volatile flash standard) |
| ⚠️ Model Number Note | "FXSU-80M" is not an official Mitsubishi part number. This is very likely a misread of "FX5U-80M" (the "5" is often OCR'd as "S"). Verify the physical label. The full suffix (e.g., /ES, /DS, /ESS) is required for the exact variant. |
We warranty all items for 30 days from date of purchase.
