The FX5U-32MT/ES is a 32-point (16 inputs / 16 outputs) transistor sink-type CPU unit from Mitsubishi Electric, belonging to the MELSEC iQ-F FX5U series — the current-generation compact PLC platform combining high-speed processing, built-in Ethernet, and integrated motion control capability in a compact DIN-rail housing. In stock at Atlantech Drives. Request your quote within 24–48 hours with worldwide shipping and 12-month warranty.
What Is the Mitsubishi FX5U-32MT/ES?
The FX5U-32MT/ES is the 32-point model of the FX5U CPU range, providing 16 DC sink-type inputs and 16 transistor sink outputs within the CPU unit itself, without requiring any extension module for basic machine control applications. The /ES suffix indicates CE-marked international version with standard screw terminal block wiring. The FX5U series represents a significant performance step over the FX3U generation: program execution speed is 34 ns per basic instruction (versus 65 ns on FX3U), built-in Ethernet (10/100BASE-TX) is standard, and the integrated 2-axis 200 kHz pulse output enables direct servo or stepper control without a dedicated positioning module. Programming is performed exclusively in GX Works3, which supports Structured Text, Ladder, FBD, and SFC languages per IEC 61131-3.
Key Technical Specifications
- Total I/O points (built-in): 32 (16 inputs + 16 outputs)
- Input type: DC sink/source, 24 V DC
- Output type: Transistor, sink (NPN), 24 V DC, 0.5 A per point
- Program memory: 64,000 steps
- Basic instruction execution: 34 ns
- Built-in Ethernet: 10/100BASE-TX, 1 port (MC Protocol, SLMP, MELSOFT)
- Built-in RS-485: 1 port (Modbus RTU master/slave, inverter communication)
- High-speed pulse output: 200 kHz, 4 axes (Y0–Y3)
- High-speed counter input: 200 kHz, 6 channels
- SD card slot: Yes (data logging, recipe, program backup)
- Power supply: 100–240 V AC (built-in PSU)
- Certifications: CE, UL
- Operating temperature: 0 to 55°C
- Dimensions (W × H × D): 150 × 90 × 87 mm
Typical Industrial Applications
The FX5U-32MT/ES is suited to standalone machine control tasks where 32 built-in I/O points cover the bulk of the application’s field devices, with expansion headroom via FX5 extension modules if required. Representative applications include: single-axis and dual-axis servo positioning systems using the built-in 200 kHz pulse output to drive MR-J4 or MR-JE servo amplifiers in pulse/direction mode, eliminating the cost of a dedicated positioning module; conveyor and indexing systems requiring Modbus RTU communication to variable frequency drives via the built-in RS-485 port; packaging and labelling machines with high-speed encoder feedback on the built-in 200 kHz counter inputs for registration mark detection; and HVAC and building automation controllers using the built-in Ethernet port for direct SCADA integration via MC Protocol without an additional communication module.
Expert Tips
- The FX5U-32MT/ES built-in RS-485 port supports Modbus RTU master mode natively via the ADPRW instruction in GX Works3 — no special function module is required to communicate with inverters, energy meters, or third-party Modbus devices. Configure the communication parameters (baud rate, parity, stop bits) in GX Works3 under Module Parameter → Built-in RS-485 before using ADPRW.
- When using the high-speed pulse outputs (Y0–Y3) for servo control, set the output mode to «open collector pulse output» in GX Works3 parameters and verify that the servo amplifier’s pulse input type matches — most MR-JE and MR-J4 amplifiers accept open collector pulse trains at up to 200 kHz without issues, but differential line driver inputs require the FX5-10PG positioning module instead.
- The SD card slot enables background data logging via the Data Logging function in GX Works3 without impacting PLC scan time — use this for recording process variable trends, alarm histories, and production counters to SD card at configurable intervals, independent of the ladder program execution.
- For systems requiring more than 32 I/O points, the FX5U-32MT/ES supports up to 8 FX5 extension modules (FX5-8EX, FX5-8EYT, etc.) and one FX5-CNV-IF adapter for legacy FX3U modules, expanding total system I/O to a maximum of 512 points.
Frequently Asked Questions
Q: What is the difference between FX5U-32MT/ES and FX5U-32MT/ESS?
A: The FX5U-32MT/ESS provides high-speed transistor outputs capable of 200 kHz pulse output on all 16 output points, whereas the standard FX5U-32MT/ES restricts high-speed pulse output to Y0–Y3 only. Choose the /ESS variant when more than 4 simultaneous high-speed pulse axes are required.
Q: Is GX Works2 compatible with the FX5U-32MT/ES?
A: No. The FX5U series requires GX Works3 exclusively. GX Works2 does not support FX5 series CPUs. Existing FX3U programs can be imported into GX Works3 using the project conversion function, but manual review and adjustment is required after conversion.
Q: Can the FX5U-32MT/ES communicate with a Mitsubishi GOT HMI panel directly over Ethernet?
A: Yes. The built-in Ethernet port supports GT Designer3 GOT connection via MELSEC Ethernet (MC Protocol) natively. Configure the GOT communication settings to use Ethernet and set the FX5U IP address in GX Works3 Module Parameter — no additional communication module is required.
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