Mitsubishi MELSEC iQ-F Series FX5U PLC | High-Performance Compact CPU & Modular I/O System for Advanced Automation

Product Overview

The Mitsubishi Electric MELSEC iQ-F Series FX5U is a flagship compact programmable logic controller (PLC) that represents the pinnacle of performance and integration in the MELSEC iQ-F platform . As the advanced successor to the renowned FX3U series, the FX5U delivers a revolutionary leap in processing speed—with basic instruction execution times of just 34ns—and system bus communication approximately 150 times faster than previous generations . This future-proof controller seamlessly integrates essential functions including high-speed positioning, analog I/O, Ethernet, and RS-485 communication directly into the CPU, eliminating the need for additional modules in many applications . Available with built-in I/O configurations from 32 to 80 points and expandable up to 512 total I/O points, the FX5U series, together with its comprehensive range of expansion I/O modules, provides the ideal solution for standalone machinery, robotic systems, and sophisticated production lines requiring high-speed control, precise motion, and seamless IoT connectivity .

FX5U CPU Module Technical Specifications

FX5U CPU Module Model Number Selection Guide

The FX5U series uses a systematic model code to identify specific configurations.

Model Code Decoder:

• MR: Relay Output

• MT: Transistor Output

• ES: AC Power Supply (100-240V AC)

• DS: DC Power Supply (24V DC)

• ESS: AC Power, Source (PNP) Transistor Output

• DSS: DC Power, Source (PNP) Transistor Output

The Mitsubishi FX5U PLC CPU and I/O modules represent the perfect convergence of compact design, high-speed performance, and advanced functionality in the world of programmable logic controllers. By integrating essential features—including Ethernet, RS-485, analog I/O, high-speed positioning, and data logging capabilities—directly into the CPU, Mitsubishi Electric has created a controller that reduces component count, simplifies system design, and accelerates time-to-market for machine builders .

With processing speeds 150 times faster than its predecessor and a comprehensive suite of built-in functions, the FX5U eliminates the need for multiple expansion modules in many applications, resulting in smaller control panels, lower costs, and improved reliability . The extensive range of I/O modules—from basic digital expansion to high-speed pulse I/O and specialized function modules—provides the flexibility to scale from simple standalone machines to complex production lines requiring synchronized multi-axis motion and IoT connectivity .