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Designed to improve output


The FX5U/FX5UC gives the FX a performance boost and adds features that set benchmark standards for compact PLCs. It enables users to develop more complex and sophisticated automation systems, as well as higher performance applications, without having to migrate to a larger and more costly PLC family. At the same time, programming through the same GX Works software used for other controllers in the Mitsubishi Electric range supports scalability.

Making high performance control affordable

With their compact dimensions and unrivalled cost/performance ratio, the MELSEC iQ-F PLCs offer the means to drive up innovation in numerous machine control applications and automation tasks, giving users the functionality and flexibility to realise new ideas and increase system performance.

Improved connectivity

The FX5U/FX5UC offers simple connection options to a wide range of automation equipment, including Mitsubishi Electric servos and inverters, Cognex vision systems, networks and energy meters, with reduced wiring effort and no additional programming.

Security functions

To protect your intellectual property FX5U/FX5UC comes with several security functions like privilege based program access and program on SD card with copy protection password.

Positioning control

The FX5U/FX5UC includes Mitsubishi Electric´s Simple Motion Unit as an intelligent function module, providing the ability to perform sophisticated motion control for up to 8 axes. Functions include linear interpolation, circular interpolation, positioning control, synchronised control, encoder following and electronic cam.

Advanced synchronous control

Software-based synchronous control can be used as an alternative to mechanical control, such as gear, shaft, transmission and cam. In addition, cam control is even easier with cam auto-generation. Synchronous control can be simply operated (start/stop) for each axis, allowing synchronous and positional control axes within the same program.

More highlights

  • High speed input & outputs
  • Analogue and PID
  • Mark detection
  • Built in Ethernet
  • Backward compatibility
  • Simple troubleshooting


I/O range (input: output)32 (1:1)64 (1:1)80 (1:1)
Maximum I/O range (including network)256 (512)
Dimensions (WxHxD)150x90x83220x90x83285x90x83
CPU performanceLDmax. 40 ns
MOV100 ns
Memory sizeProgram64 K steps
Comment and Source CommentComment: 2 MB
Source: 1 MB
Word device56 K words
Output typeRelay, Transistor
Integrated functions 
 High speed counter1-phase counter200 KHz 6ch
10 KHz 2ch
2-phase counter100 Kz 3ch
5 KHz 1ch
Pulse output200 KHz 4 axis (Open collector)
Simple linear interpolation
(Transitor type only)
Memory card interfaceSD card
Communication portEthernet port, RS485 1ch
AnalogInput (resolution)2ch (12 bit)
Output (resolution)1ch (12 bit)
Real time clockretained up to 10 days with capacitor
(Ambient temperature 25°C)
Service power supply (24 V DC)400 mA
Expansion board slots1 slot
AdaptorCommunication expandability2
Analog expandability4