QJ71M791

Overview of Mitsubishi QJ71M791

The Mitsubishi QJ71M791 (also referenced as QJ71MT91) is a high-speed network communication module for the MELSEC-Q series PLCs. It supports MODBUS TCP protocol and allows efficient, reliable communication between multiple CPUs or with external devices over Ethernet networks.

Key Features of Mitsubishi QJ71M791

• Network Type: MODBUS TCP Master and Client Interface
• Communication Speed: 10Base-T / 100Base-TX Ethernet with RJ-45 connector
• High Performance: Enables high-speed data exchange with multiple PLC devices in real-time industrial environments
• Input/Output Points: Can handle up to 4096 input and 4096 output points, supporting up to 8192 I/O elements
• Program Capacity: Supports 30,000 steps of user programs
• Compatibility: Designed for MELSEC-Q PLC series and supports multi-CPU parallel processing
• Installation: Compact module with a width of 27.4 mm, height of 98 mm, and depth of 90 mm
• Certifications: Compliant with CE, UL, and UKCA standards
• Additional Features: Supports USB and network communication; memory card support for data storage and transfer

Technical Specifications of Mitsubishi QJ71M791

Applications / Use Case

The Mitsubishi QJ71M791 communication module is used in complex automation networks where multiple MELSEC-Q CPUs need to communicate at high speed. It is ideal for large-scale factory automation, system integration, and real-time data acquisition in manufacturing environments.