Q: What voltage signals does the QX81 accept?
A: 24 VDC source-type digital inputs across 32 points.
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Mitsubishi
QX81
DC Input Module, 32-point, 24 VDC, Source
Mitsubishi
From $248.07In stock
Product Description
The QX81 is a MELSEC‑Q (QnU) series local I/O module designed as a 32‑point DC digital input unit for Mitsubishi PLC systems. It accepts 24 VDC source-type signals and integrates cleanly into Q-series racks for high-density input applications. The module features low internal current consumption and connector-based wiring, supporting efficient panel layouts and rapid installation. It is suited for noisy industrial environments and maintains compliance with major global standards for broad deployment. Typical use cases include monitoring sensors, switches, and field devices with 24 VDC logic levels across machine control and process automation. The unit is commercialized by Mitsubishi Electric and aligns with GX Developer configuration workflows for response-time tuning and I/O assignments. Package contents generally include the input module; optional mating connectors are available separately depending on the installation. Its compact footprint and 32 integrated input points make it an effective choice for scalable, reliable input aggregation in Q-series control architectures.
Key Features
- •32 digital inputs at 24 VDC source type, MELSEC‑Q QnU series local I O unit, Low internal current consumption 0.075 A typical, Connector based wiring for fast installation, Global compliance CE UL cUL EAC, Compact module for high density panels
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $613
Availability: 20 in stock
Lead time: ~2 day lead
Never Used
Price: $532
Availability: 10 in stock
Lead time: ~2 day lead
Used
Price: $248.07
Availability: 302 in stock
Lead time: ~2 day lead
FNFP
Price: $806
Availability: 3 in stock
Lead time: ~5 day lead
Specifications
- Manufacturer
- MITSUBISHI
- Model
- QX81
- Main Function
- Digital input I/O unit
- Input Points
- 32 digital inputs
- Rated Input Voltage
- 24 VDC (source)
- Internal Current Consumption
- 0.075 A
- Wiring
- Connector
- Series
- MELSEC‑Q (QnU) series
- Product Status
- Commercialized
- Compliance
- CE, UL/cUL, EAC
- Occupied I/O Points on PLC
- 32
- Part #
- QX81
- Category
- PLCs/Machine Control
- Subcategory
- PLC Module/Rack
- Weight
- 0.26 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.
Need QX81 availability?
Prices and stock can change. Submit quantity, required condition, and destination for a current quote.
FAQ
Q: Which PLC series is this module compatible with?
A: It is for the MELSEC‑Q (QnU) series local I/O.
Q: How is field wiring connected?
A: Via a connector interface designed for quick installation.
Q: What certifications does it carry?
A: CE, UL/cUL, and EAC compliance are listed.
Q: What is the internal current consumption?
A: Approximately 0.075 A according to published data.