QX40 16-Point Digital Input Module 24V DC Sink | Mitsubishi

The Original New Mitsubishi QX40 is a 16-point digital input module from the MELSEC-Q series, designed for reliable signal acquisition from field devices in industrial automation systems. It accepts 24 V DC input signals with a rated input current of approximately 4 mA and features a configurable response time of 1, 5, 10, 20, or 70 ms. The module uses photocoupler isolation between input terminals and the PLC power supply, and connects via an 18-point screw terminal block. As part of the MELSEC-Q platform, it integrates directly into Q series base units and is compatible with QnU, QnH, and other Q series CPU modules. The compact 27.4 mm width and 98 × 90 mm footprint make it suitable for space-efficient control panel installations.

Core Engineering Highlights:
16 digital inputs (24 V DC, sink/positive common type) | 4 mA rated input current | Configurable response time: 1 / 5 / 10 / 20 / 70 ms | 16 points/common | Photocoupler isolation | 0.05 A internal current consumption | 18-point screw terminal block | 0.16 kg weight | IP2X protection

Key Features:

• Original New Mitsubishi QX40 module

• 16 digital input points, 24 V DC sink type (positive common)

• Approximately 4 mA rated input current per point

• Configurable response time: 1 / 5 / 10 / 20 / 70 ms (selectable via PLC parameter)

• ON voltage/current: 19 V or more / 3 mA or more

• OFF voltage/current: 11 V or less / 1.7 mA or less

• Photocoupler isolation between input terminals and PLC power supply

• 16 points/common configuration

• 18-point screw terminal block for field wiring

• Occupied I/O points: 16 (I/O assignment: Input 16 points)

• Internal current consumption (5 V DC): 0.05 A

• ON display LED per input point for easy status verification

• Compact 27.4 mm width for high-density panel mounting

• RoHS compliant, CE, UL/cUL approved

• Shipping approvals: ABS, BV, DNV GL, LR, NK, RINA

Applications:

• Digital signal acquisition from sensors, limit switches, and pushbuttons

• Factory automation and production line control

• Conveyor and material handling systems

• Packaging machinery and assembly line monitoring

• Process control and machine automation

• Distributed I/O systems with MELSEC-Q series

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi MELSEC-Q series base units (main base and extension base)

• Compatible with Q series CPU modules including QnU, QnH, QnPH, QnPRH, and Q00J/Q00/Q01 series

• Installs in any Q series I/O slot via the Q series backplane bus

• Programming and configuration via GX Works2 or GX Developer engineering software

Related Products:

• QX40-S1 – 16-point high-speed DC input module (6 mA, 0.1–1 ms response time)

• QX40-TS – 16-point DC input module with spring-clamp terminal block

• QX41 – 32-point DC input module (sink type, 40-pin connector)

• QX81 – 32-point DC input module (source type)

• QY10 – 16-point relay output module

• Q61P – Power supply module for MELSEC-Q base units

• Q38B – 8-slot main base unit for Q series

• RX40C7 – Successor module for MELSEC iQ-R series (recommended for new designs)

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi, MELSEC, and MELSEC-Q are trademarks of Mitsubishi Electric Corporation.