Mitsubishi QJ71MB91

Mitsubishi QJ71MB91

Overview

The Mitsubishi QJ71MB91 is a Modbus master/slave communication module for the MELSEC-Q Series PLCs. It supports both RS-485 and RS-422 serial interfaces, allowing flexible connection with various Modbus-compatible devices. This module is ideal for industrial environments requiring robust and reliable data exchange over Modbus protocols.

Key Features

• Supports Modbus RTU and ASCII

• Operates as master or slave

• RS-485/RS-422 communication interfaces

• Easy parameter setting via GX Developer/GX Works

• High-speed data exchange

• DIN rail or Q Series rack mountable

• LED indicators for diagnostics

• Ideal for integrating third-party Modbus devices

Technical Specifications

• Part Number: QJ71MB91

• Manufacturer: Mitsubishi Electric

• Series: MELSEC-Q

• Protocols: Modbus RTU, Modbus ASCII

• Communication Ports: RS-485/RS-422

• Transmission Speed: Up to 115.2 kbps

• Max Stations: 32 (RS-485 multipoint)

• Operating Modes: Master/Slave

• Power Supply: From base unit

• Operating Temperature: 0 °C to +55 °C

• Mounting: Q Series base rack

• Configuration: Software-based (GX Developer/GX Works)

Applications

• Third-party device integration

• Remote terminal unit (RTU) communications

• Building automation systems

• Factory floor device control

• Distributed sensor/actuator management

Why Choose the QJ71MB91

• Enables Modbus network integration within Q Series PLCs

• Supports versatile serial communication options

• Simple configuration and diagnostics

• Reliable Mitsubishi industrial-grade quality

• Reduces wiring with RS-485 multi-drop support

Order Now

The Mitsubishi QJ71MB91 Modbus communication module is available and ships worldwide.

Return to the Mitsubishi MELSEC-Q Series collection for more options in this family.

Explore our full range of Mitsubishi MELSEC Programmable Controllers (PLC) to discover scalable automation solutions, from legacy MELSEC systems to next-generation PLCs designed for high performance, connectivity, and flexibility.

NEW product in original sealed packaging. The product may be of older version or design. The packaging may have markings, signs of discoloration, and wear. DDPARTSSOLUTION Warranty: 1 Year. Manufacturer's Warranty and Support NEVER apply