An ISO 9001:2008 Certified Company


The MELSEC-F Series PLC incorporates power supply, CPU and I/Os into a single compact unit. It perfectly meets the diverse needs of a variety of user applications with options for I/O, analog, positioning and open network expansion.

Compact Plc

It is now over 30 years since Mitsubishi Electric launched the first compact PLC on the European market. Since then Mitsubishi has become the world market leader in this sector, with over 10 million of its compact controller installations to its credit.

With their compact dimensions and low cost compact controllers have opened up new perspectives in industrial automation. Many applications for which automation was once not even an option can now benefit from the many advantages of these controllers.

The FX3U series that is now being launched worldwide is the third generation Mitsubishi Electric's extremely successful family of compact PLCs. The new flagship line once again sets new standards - and not only in the compact controllers class. The FX3U takes compact controllers into another dimension, delivering performance that was formerly the exclusive domain of larger control systems in a compact package.

The FX family now includes independent but fully mutually-compatible product lines:

What can you expect from the MELSEC FX series?

  • Worldwide compatibility
  • thanks to their wide power supply range the FX controllers can be used all over the world
  • Internationally approved
  • MELSEC FX controllers conform to all major international industrial standards and maritime classifications
  • Flexible solutions
  • the base unit can be combined with optional expansion and special function modules to configure a system that is precisely geared to the needs of your application
  • Simple programming
  • complex functions can be combined and executed with a single instruction
  • Speed
  • the entire FX family has always set the standards for execution speed (FX3U: 0.065µs per logical instruction)
  • Compatibility
  • The lines in the FX family are different and independent products, but they are still fully compatible with one another

Product range

Power supply 100–240 VAC/ 24 VDC 100–240 VAC/ 12-24 VDC 100–240 VAC/ 24 VDC 100–240 VAC/ 24 VDC 24 VDC
No. of inputs 6–16 8–36 8–36 8–64 8–48
No. of outputs 4–14 6–24 8–24 8–64 8–48
Digital outputs Relay, transistor Transistor
Program cycle period per logical instruction 0.55–0.7 µs 0.55–1 µs 0.21–0.42 µs 0.065 µs 0.065 µs
User memory 2k steps EEPROM (internal) 8k steps EEPROM (internal), EEPROM/EPROM cassettes (optional) 32k steps EEPROM (internal), EEPROM cassettes (optional) 64k steps (standard), FLROM cassettes (optional) 64k steps (standard), EEPROM cassettes (optional)
Dimensions in mm (WxHxD) 60–100x90x49 90–175x90x75 90–175x90x86 130–350x90x86 34–86x90x74

PLC main unit

All-in-one power supply, CPU and I/O main unit. Built-in features include high-speed counters and positioning outputs.

I/O extension

Both 'I/O Extension Units' with a built-in power supply and 'I/O Extension Blocks' without a power supply are available in various I/O sizes and configurations.

Analog control

Options for analog inputs and outputs, temperature sensor inputs and temperature control are available.

High-speed counting

Options are available to supplement the built-in high-speed counters with additional high-speed counting capacity or greater performance high-speed counting.

Positioning control

High-speed pulse output modules in addition to SSCNETIII positioning options are available.

Network communication

Expansion options are available for CC-Link and Ethernet networks, as well as for RS-232C and RS-485 serial communication protocols.