The QJ71MT91 is a communication interface module for Mitsubishi's Q Series PLCs, enabling seamless integration with MODBUS/TCP networks. This module allows Q Series PLCs to communicate with MODBUS-compatible devices (such as sensors, drives, and HMIs) over standard Ethernet networks.
Key Features & Specifications
Category Specification
Model QJ71MT91
Compatible PLCs Q Series (requires QCPU with bus connection)
Protocol Support MODBUS/TCP (Client & Server modes)
Ethernet Port 10BASE-T/100BASE-TX (RJ45, Auto-MDIX)
Max Connections 16 simultaneous connections
Data Handling Reads/Writes up to 256 words per request
LED Indicators RUN, ERR, LINK/ACT, etc.
Power Consumption 0.55W (5V DC from base unit)
Dimensions (W×H×D) 27.4 × 98 × 90 mm
3. Communication Capabilities
MODBUS/TCP Client Mode: Actively polls MODBUS devices (Function Codes: 01, 02, 03, 04, 05, 06, 15, 16).
MODBUS/TCP Server Mode: Responds to requests from MODBUS masters.
Transparent Mode: Raw TCP/UDP communication for custom protocols.