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QJ71C24N-R4

The QJ71C24N-R4 is a high-performance serial communication module for Mitsubishi's Q Series PLCs, providing RS-232/RS-422/RS-485 interfaces for industrial automation systems. This module enables reliable data exchange with various external devices including HMIs, scanners, and measurement equipment.

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Key Features
Dual-Port Communication

2 independent serial ports (CH1/CH2)

Each port supports:

RS-232C (1:1 connection)

RS-422/485 (1:N multidrop)

Flexible Protocol Support

MELSEC communication protocol (MC protocol)

Non-protocol communication (custom ASCII/hex)

Bidirectional communication (full-duplex)

High-Speed Data Transfer

Max baud rate: 230.4kbps

Large buffer memory: 2KB per channel

Data flow control (XON/XOFF, DC codes)

Enhanced Functions

Communication diagnostics (error detection/counters)

Dedicated instructions for data control (RS, RS2)

Modem interface support (via RS-232C)

Robust Design

LED indicators for port status monitoring

Operating temperature: 0°C to 55°C

DIN rail mountable

Technical Specifications
Parameter Specification
Interface Standards RS-232C/422/485 (selectable per port)
Baud Rate 2.4kbps - 230.4kbps (software configurable)
Isolation Photocoupler (between PLC and ports)
Data Bits 7/8 bits
Parity None/Odd/Even
Stop Bits 1/2 bits
Power Supply 5VDC (from base unit)
Current Consumption 0.6A