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Mitsubishi Electric Q04UDHCPU — PLCs (Programmable Logic Controllers)

Mitsubishi Q04UDHCPU PLC CPU, 40K step, 0.39A

MPNQ04UDHCPU

Mitsubishi Electric Melsec Q Series CPU module Q04UDHCPU, 40K step program capacity, 160K bytes memory, 9.5ns/19ns processing speed, 0.39A DC5V consumption.

$1,194.00 – $1,779.27Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

Q04UDHCPU key specifications
ParameterValue
DC5V internal current consumption0.39A
Latch (power outage holding) rangeL0 ~ 8191 (default 8192 points) [B, F, V, T, ST, C, D, and latches the range settable for W]
Allowable momentary power failure timeBy the power supply unit
Memory card interfaceYes (SRAM / Flash / ATA card)
Peripheral device connection portUSB, RS-232
Shipping weight1.5 Kg
External dimensions98mm x 27.4mm x 89.3mm
Standard RAMDefault 2048 points (SB0 ~ 7FF) (changed)
Write the number of standard ROMUp to 10 million times
ATA card256
Flash cardFour
Constant scan0.5 ~ 2000ms (settable in 0.5ms units)

All specifications

Q04UDHCPU additional specifications
ParameterValue
Clock functionYear, month, day, hour, minute, second, day of the week (leap year automatic identification) Accuracy: -2.96 ~ + 3.74s (. TYP + 1.42s) / d at 0 Accuracy: -3.18 ~ + 3.74s (. TYP + 1.50s) / d at 25 Accuracy: -13.20 ~ + 2.12s (. TYP -3.54s) / d at 55
Control methodStored program repeat operation
Normal counterdefault 1024 points (C0 ~ 1023) (changed)
Memory capacity160K bytes
Processing speed9.5ns , 19ns
Program capacity40K step (160K bytes)
Link direct deviceDevice that directly access the link device CC-Link IE, MELSECNET / H dedicated specified format: J \ X , J \ Y , J \ W , J \ B , J \ SW , J \ SB
RUN (PAUSE contact)X0 ~ RUN / PAUSE contact each one-point configurable than 1FFF
SRAM card (1M byte)Default 2048 points (SW0 ~ 7FF) (changed)
Programming languageRelay symbol language, logic symbolic language, MELSAP3 (SFC), MELSAP-L, function block, structured text (ST)
SRAM card (2M bytes)Default 8192 points (S0 ~ 8191) (changed)
SRAM card (4M bytes)Maximum 20 points (Z0 ~ 19)
SRAM card (8M bytes)Up to 10 points (Z0 ~ 18) (used in the double word the index register [Z])
Flash card (2M bytes)4096 points (P0 ~ 4095) (device points is fixed) Settable the range of use of local pointer / Common pointer by the parameter
Flash card (4M bytes)Point 256 (I0 ~ 255) (device points is fixed) Settable constant cycle interval of system interrupt pointer I28 ~ 31 by the parameter (0.5 ~ 1000.0ms, 0.5ms units) Default I28: 100ms, I29: 40ms, I30: 20ms, I31: 10ms
Input-output control systemRefresh method (direct access input and output (DX, DY) direct access input and output allowed by the specification of)
Maximum storage file number124 present
Input and output device points8192 points (X / Y0 ~ 1FFF)
Intelligent function module deviceDevice specified format to access the buffer memory of intelligent function module directly: U \ G
Write the number of program memoryUp to 10 million times
Installed memory card capacity of (Flash cardUp to 4M bytes, ATA card: Up to 32M bytes)
Intelligent function module parameter setting maximum number4096

Product details

CPU performance and scan timing

The Q04UDHCPU: Constant scan interval settable from 0.5 to 2000ms in 0.5ms steps, giving deterministic control over program execution timing. Control method is stored program repeat operation, the standard for reliable machine sequencing.

Memory and expansion

Program memory is 40K steps (160K bytes), with standard RAM of 2048 points for latch and device memory. Memory card interface supports SRAM, Flash, and ATA cards — Flash up to 4M bytes, ATA up to 32M bytes. Flash card slots accept up to four cards for recipe storage or program backup.

Comparison with iQ-R series

The R08ENCPU from the iQ-R series doubles program capacity to 80K steps and includes a built-in CC-Link IE port, but requires a different backplane and draws 1.49A at 5V versus 0.39A. Footprint is larger (56 x 106 x 110 mm vs 98 x 27.4 x 89.3 mm).

Frequently asked questions

What is the supported ATA card capacity?

The memory card interface accepts ATA cards up to 32M bytes.

What Flash card capacity does it support?

Flash cards up to 4M bytes each, with support for up to four cards.

Will Q04UDHCPU drop into a panel wired for FX5-16ER/ES?

No, FX5-16ER/ES is an I/O module for the iQ-F series, not a CPU; backplane and mounting are completely different.

MPN
Q04UDHCPU