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QJ71C24N

The Mitsubishi QJ71C24N is a high-performance serial communication module for the MELSEC-Q Series PLC, supporting RS-232, RS-422, and RS-485 interfaces. Designed for industrial automation, it enables reliable data exchange with HMI, barcode readers, sensors, and other serial devices.

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Key Specifications
Communication Standards:

RS-232 (1 channel)

RS-422/485 (1 channel, switchable)

Baud Rate: 300 to 115,200 bps (configurable)

Data Format: Adjustable (parity, stop bits, data length)

Protocol Support:

Non-protocol (custom ASCII communication)

MC Protocol (Mitsubishi PLC communication)

Modbus RTU (slave mode)

Isolation: Photocoupler isolation for noise immunity

Mounting: Installs on Q Series base unit

Operating Temperature: 0°C to 55°C

Power Consumption: 5V DC, 0.35A (from PLC backplane)

Main Features
✔ Dual-Port Flexibility – Supports RS-232 and RS-422/485 simultaneously
✔ Multi-Protocol Compatibility – Works with MC Protocol, Modbus RTU, and custom ASCII
✔ High-Speed Data Transfer – Up to 115.2kbps for real-time communication
✔ Diagnostic LEDs – RUN, ERR, SD, RD indicators for easy troubleshooting
✔ GX Works2 Integration – Simple parameter setting via PLC programming software
✔ Industrial Durability – Vibration/shock resistant (conforms to IEC 61131-2)

Typical Applications
HMI/SCADA communication (e.g., GOT, Pro-Face)

Barcode scanner/RFID integration

Legacy device connectivity (weighing scales, printers)

Modbus RTU networks (as a slave device)

Data logging to external storage