Mitsubishi QJ71C24N Communication Module

Description

Mitsubishi QJ71C24N Communication Module

Product Dimensions：

The Mitsubishi QJ71C24N is a high-performance Serial Communication Module designed for the MELSEC-Q Series PLC (Programmable Logic Controller). It serves as a bridge for data exchange between the PLC and external devices such as PCs, HMIs, barcode readers, and printers.

1. Product Overview

The QJ71C24N features two communication channels, allowing for versatile connectivity using standard serial protocols. It is widely recognized for its reliability in industrial automation environments.

• Channel 1: RS-232 interface (9-pin D-sub).

• Channel 2: RS-422/485 interface (Two-part terminal block).

2. Technical Specifications

3. Key Advantages

• Simultaneous Multi-Channel Use: Operate both RS-232 and RS-422/485 ports at the same time for different peripheral devices.

• High-Speed Communication: Supports baud rates up to 230.4 kbps, ensuring rapid data updates and reduced latency.

• “Pre-defined Protocol” Support: Simplifies the programming process. Users can select from a library of communication protocols for third-party devices (e.g., Modbus) without writing complex ladder logic.

• Remote Debugging: Allows the PLC to be programmed or monitored remotely via the serial port using GX Works2/Works3.

• Reliability: Built with industrial-grade noise immunity and robust hardware design typical of the Mitsubishi MELSEC-Q series.

4. Safety and Installation Precautions

• Wiring: Ensure that RS-422/485 lines are properly terminated with matching resistors (typically $110 \Omega$ to $330 \Omega$) to prevent signal reflection.

• Noise Mitigation: Keep communication cables away from high-voltage power lines or motor drive cables to avoid electromagnetic interference.

• Module Placement: Always turn off the power supply to the PLC rack before mounting or removing the module to prevent electrical damage.

• Grounding: Ensure the FG (Frame Ground) terminal is properly grounded to a dedicated industrial ground.

5. Typical Applications

• Data Acquisition: Connecting to electronic scales, barcode scanners, or RFID readers on a production line.

• HMI/SCADA Connectivity: Communicating with touch panels or PC-based monitoring software.

• Device Integration: Controlling third-party hardware like Temperature Controllers, Inverters (VFDs), and Power Meters via Modbus or dedicated protocols.

• Printer Output: Generating automated production reports or labels directly from the PLC.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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