Mitsubishi QX82-S1 Digital Input Module

Reliable 64-Point 24V DC Input Module for MELSEC-Q PLC Systems

The Mitsubishi QX82-S1 is a high-density digital input module designed for the MELSEC-Q Series programmable controller platform. Built for industrial automation environments that require stable signal acquisition and efficient cabinet space usage, this module provides 64 digital input points, supports 24V DC input signals, and is suited for control systems where fast and dependable input processing is essential.

With its negative common design, 32 points per common, and 40-pin connector x 2 interface, the QX82-S1 is well suited for machine control, factory automation panels, and integrated PLC systems that need to manage a large number of field input signals in a compact footprint.

Designed for Stable Input Collection in Industrial Control Applications

In practical automation projects, input modules play a critical role in receiving signals from pushbuttons, limit switches, proximity sensors, and other field devices. The QX82-S1 is built specifically for this task, offering 24V DC rated input voltage and 4 mA rated input current, helping maintain consistent signal recognition across standard industrial control setups.

This module also supports selectable input response times of 0.1 / 0.2 / 0.4 / 0.6 / 1 ms, which allows greater flexibility when matching module behavior to the response requirements of the machine or process. That makes it a suitable choice for systems where both speed and input stability matter.

Key Product Features

• 64 digital input points for higher signal capacity in one module

• 24V DC rated input voltage for common industrial control applications

• 4 mA rated input current for standard signal detection requirements

• Selectable response times: 0.1 / 0.2 / 0.4 / 0.6 / 1 ms

• Negative common type, with 32 points/common

• 40-pin connector x 2 for module connection

• Photocoupler isolation for internal electrical isolation

• IP2X protection degree according to official specification listing

Why Choose Mitsubishi QX82-S1

For users building or maintaining MELSEC-Q PLC systems, the QX82-S1 offers a practical combination of high point count, fast response setting options, and trusted Mitsubishi Electric platform compatibility. It is especially useful in applications where panel space is limited but multiple digital input channels are required.

Because it is part of the MELSEC-Q family, the module fits naturally into existing Mitsubishi automation architectures and supports standardized PLC system design, helping reduce integration complexity for control engineers, maintenance teams, and machine builders.

Typical Applications

The Mitsubishi QX82-S1 digital input module is commonly used in:

• PLC-based factory automation systems

• Packaging and assembly machinery

• Conveyor and material handling lines

• Sensor signal collection in industrial panels

• Equipment retrofits and Mitsubishi Q Series maintenance projects

These use cases are consistent with the module’s official positioning as a 64-point DC input unit for MELSEC-Q programmable controllers.

Technical Specifications

All specifications above are based on Mitsubishi Electric’s official product page and user manual references.

FAQ

Q1: What is the Mitsubishi QX82-S1 used for?
A: The QX82-S1 is a 64-point digital input module used in Mitsubishi MELSEC-Q PLC systems to receive 24V DC field input signals from devices such as switches, sensors, and control contacts.

Q2: Is the QX82-S1 an input module or an output module?
A: It is a digital input module, not an output module. Mitsubishi lists it as a DC input unit in the MELSEC-Q Series.

Q3: How many input points does the QX82-S1 have?
A: The module provides 64 input points, making it suitable for systems that need higher input density in a single PLC slot.

Q4: What input voltage does the QX82-S1 support?
A: The rated input voltage is 24 V DC, with a rated input current of 4 mA according to the official Mitsubishi specification.

Q5: Is the response time adjustable on the QX82-S1?
A: Yes. The input response time can be set to 0.1, 0.2, 0.4, 0.6, or 1 ms, depending on application requirements.