Q: What PLC series is this CPU compatible with?
A: It is part of the MELSEC‑Q (QnU) series and mounts on the Q‑series rack.
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Mitsubishi
Q25HCPU
Q25HCPU PLC CPU unit, MELSEC‑Q QnU series
Mitsubishi
From $2,809.1In stockDiscontinued
Product Description
The Q25HCPU is a high‑performance CPU unit for Mitsubishi’s MELSEC‑Q (QnU) series PLC platforms, designed for stored‑program cyclic operation with a refresh‑based I/O control system. It supports multiple IEC‑style programming environments, including Ladder Diagram, Structured Text, Function Block Diagram, and sequence languages such as MELSAP3 (SFC) and MELSAP‑L, enabling flexible control strategies across complex machines. Program capacity is 252 K steps (approximately 1008 KB), with extensive internal devices: large allocations for timers, counters, data registers, internal and latch relays, link devices, file registers, and special registers, supporting sophisticated applications and diagnostics. I/O connection capacity is up to 4096 points. The module offers onboard USB and a 9‑pin D‑Sub RS‑232 interface for programming and integration, and mounts on a Q‑series backplane using the dedicated rack and 5 VDC system power supply. Typical instruction execution times reach 34 ns for LD, with fast performance across MOV and floating‑point operations, suitable for high‑speed automation tasks. Operating temperature ranges from 0 to 55 °C with storage from −25 to 75 °C, aligning with industrial environments.
Key Features
- •High performance stored‑program cyclic CPU unit
- •252 K steps program, approx 1008 KB
- •Up to 4096 I O point capacity
- •USB and RS 232 onboard interfaces
- •Backplane rack mounting with 5 VDC supply
- •Supports LD ST FBD SFC MELSAP L languages
- •Fast execution, 34 ns LD instruction
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $3,320.45
Availability: 6 in stock
Lead time: ~2 day lead
Never Used
Price: $3,320.45
Availability: 6 in stock
Lead time: ~2 day lead
Used
Price: $2,809.1
Availability: 42 in stock
Lead time: ~2 day lead
Specifications
- Product series
- MELSEC‑Q (QnU) series
- Main function
- CPU unit
- Program capacity
- 252 K steps / ~1008 KB
- I/O capacity
- 4096 points
- Interfaces
- USB, 9‑pin D‑Sub RS‑232
- Communication
- RS‑232
- Mounting
- Backplane / rack
- Supply voltage
- 5 VDC from dedicated Q‑series PSU
- Operating temperature
- 0 to 55 °C (32 to 131 °F)
- Storage temperature
- −25 to 75 °C (−13 to 167 °F)
- Instruction time (LD)
- 34 ns per instruction
- Instruction time (MOV)
- 102 ns per instruction
- Floating point add
- 780 ns
- Constant scan refresh
- 0.5 ms to 2 s
- Programming languages
- LD, ST, FBD, MELSAP3 (SFC), MELSAP‑L
- Model number
- Q25HCPU
- Part #
- Q25HCPU
- Category
- PLCs/Machine Control
- Category
- PLC Module/Rack
- Weight
- 0.40 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
Independent sourcing disclaimer
We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
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FAQ
Q: What is the program memory capacity?
A: 252 K steps, approximately 1008 KB.
Q: Which interfaces are available on the module?
A: USB and a 9‑pin D‑Sub RS‑232 port.
Q: What is the maximum I/O point capacity?
A: Up to 4096 I/O points.
Q: What power does the CPU require?
A: 5 VDC supplied from the dedicated Q‑series power supply unit.