FX5U-32MR/ES

Product information

Product Overview

The FX5U-32MR/ES is a Mitsubishi Electric MELSEC iQ-F series CPU module — the FX5U standard type with 16 inputs / 16 outputs, relay outputs, powered from AC 100–240 V, and with removable screw terminal blocks (M3 screws). It is the current-generation micro PLC that replaced the long-running FX3U family, and it is in current production (official sales status: On sale), so unlike discontinued controllers this page covers both new-build supply and genuine spare demand. Its core specification is identical across the FX5U platform: a 34 ns LD instruction execution time, 64 k-step program capacity (128 k steps with CPU firmware 1.100 or later), 120 kbytes device/label memory and 5 Mbytes data memory. Ladder, ST, FBD/LD and SFC programming are all supported from GX Works3. The value proposition is what is built in rather than bolted on: Ethernet and RS-485 ports are standard (no communication module needed for HMI, programming, MODBUS RTU/TCP or socket communication), a high-speed counter handles up to 6 ch at 200 kHz plus 2 ch at 10 kHz, positioning runs up to 4 axes at 200 kHz, and both an SD memory card slot and a web-server function are on board. The screw-terminal FX5U also carries 2 channels of analog input and 1 channel of analog output built in, so sensor inputs and drive setpoints usually need no analog module at all.

Technical Specifications (Official Mitsubishi Electric Data)

Product family	Mitsubishi Electric MELSEC iQ-F series — FX5U standard type
Model	FX5U-32MR/ES
Integrated I/O	16 inputs / 16 outputs
Output type	Relay output
Power supply	100 to 240 V AC
Control system	Stored-program repetitive operation
I/O control system	Refresh system
Programming language	Ladder diagram (LD), structured text (ST), function block diagram/ladder diagram (FBD/LD), sequential function chart (SFC)
Program capacity	64 k steps/128 k steps (128 kbytes/256 kbytes, flash memory)
Command processing time (LD / MOV)	34 ns
Constant scan	0.2 to 2000 ms (can be set in 0.1 ms increments)
Device/label memory	120 kbytes
Data memory / standard ROM	5 Mbytes
SD memory card	Memory card capacity (SD/SDHC memory card: Max. 16 Gbytes)
Built-in Ethernet port	1 channel (built-in as standard)
Built-in RS-485 port	1 channel (built-in as standard)
Built-in analog I/O	2 ch analog input + 1 ch analog output
Input points / connection	16 points / Removable terminal block (M3 screws)
Input type	Sink/source
Input signal voltage	24 V DC +20%, -15%
Input signal current (X0–X17)	5.3 mA/24 V DC
Input response frequency (X0–X5)	200 kHz
Input response time (X0–X5)	ON: 2.5 μs or less / OFF: 2.5 μs or less
Output points / connection	16 points / Removable terminal block (M3 screws)
Output external supply	30 V DC or less / 240 V AC or less (“250 V AC or less” if not a CE, UL, cUL compliant item)
Output max. load	2 A/point
Output min. load	5 V DC, 2 mA (reference values)
Output response time (OFF→ON)	Approx. 10 ms
Output circuit insulation	Mechanical insulation
Power consumption	30 W
Power fuse	250 V, 3.15 A Time-lag fuse
Rush current	25 A max. 5 ms or less/100 V AC / 50 A max. 5 ms or less/200 V AC
Operating ambient temperature	-20 to 55℃, non-freezing
Storage ambient temperature	-25 to 75℃, non-freezing
Operating ambient humidity	5 to 95%RH, non-condensation
Dielectric withstand voltage (power/ground)	1.5 kV AC for one minute
Insulation resistance	10 MΩ or higher by 500 V DC insulation resistance tester
Grounding	Class D grounding (grounding resistance: 100 Ω or less)
Operating altitude	0 to 2000 m
Overvoltage category / pollution degree	II or less / 2 or less
External dimensions	150 mm (W) / 123 mm mounting hole pitch
Mass (weight)	Approx. 0.7 kg
Applicable standards	UL cUL CE(EMC) CE(LVD) CE(RoHS) KC(EMC) LR NK DNV ABS RINA BV KR

All values above are taken verbatim from Mitsubishi Electric’s official MELSEC iQ-F specification data (mitsubishielectric.com product specification pages) and the official MELSEC iQ-F FX5S/FX5UJ/FX5U/FX5UC hardware manual for external dimensions and mass. No third-party or estimated figures are used. Where the official data carries a condition or footnote, the value shown is the headline figure — request the full datasheet with your enquiry for the qualified figures.

Lifecycle Status & Availability

Mitsubishi Electric lists the FX5U-32MR/ES as on sale — an active, current-production MELSEC iQ-F CPU module, not a discontinued or phase-out item. Spares, firmware updates and the GX Works3 engineering environment are all still supported by the manufacturer.

Stock on this page is real trade stock: condition, firmware revision and quantity are confirmed individually at quotation. We do not publish a fixed lead time or inventory figure, because both change weekly.

This model takes an AC 100–240 V supply, which suits cabinets where a 24 V DC bus is not available or where the PLC is retrofitted into existing AC-powered panels.

Typical Applications

• Replacement and spare supply for existing FX5U-32MR/ES installations where the exact catalogue number and revision matter
• Machine-building and OEM panel construction on the current iQ-F platform
• Loads that switch mains or high-inrush circuits, where relay outputs are preferred over semiconductors
• Panel builds that need built-in analog I/O without buying an extra analog module
• Processes needing MODBUS RTU/TCP, CC-Link IE Field Network Basic or simple CPU-to-CPU communication over the built-in ports

Related & Compatible Models

Transistor-output equivalent: FX5U-32MT/ES. Same I/O on a 24 V DC supply: FX5U-32MR/DS. Larger relay-output models: FX5U-64MR/ES (32/32) and FX5U-80MR/ES (40/40). Compact connector type: FX5UC-32MT/D.

Requesting a Quotation

To quote the FX5U-32MR/ES accurately, please state the exact catalogue number, the required quantity, and whether you need the module alone or with expansion modules, SD card, battery and mounting accessories. Where a machine is down, say so and attach the existing unit’s nameplate photo — that lets us confirm the firmware revision before shipping and avoid a second delivery.

We do not publish stock levels, prices or delivery times on this page: they are confirmed individually against real availability at the time of your enquiry.

Frequently Asked Questions

Why choose the relay-output -32MR/ES over the transistor -32MT/ES?

Relay outputs switch heavier loads: 2 A per point here, against 0.5 A per point on the transistor version, and they can switch AC as well as DC. Relay contacts are mechanically isolated, so you also avoid the leakage current of a semiconductor output. The trade-off is switching speed and mechanical life — for high-frequency pulse output or positioning, choose the transistor version.

How many relay outputs can be on at once?

The official specification gives 2 A per point and limits the total load current per common terminal to 8 A across 4 output points. Plan the common-terminal grouping against that figure rather than against the per-point rating alone.

Can I power this from 24 V DC instead?

Yes — that is the FX5U-32MR/DS, which is the same 16/16 relay-output module on a 24 V DC supply. Both are listed on this site.

Is an SD card or battery required?

Neither is required to run the module. Program memory is non-volatile flash and the design is battery-less. An SD card is optional, for program update by card, data logging or backup.

Is it in current production?

Yes, the official sales status is on sale. It is an active current-generation MELSEC iQ-F model.