QJ71C24 Mitsubishi Electric MELSEC-Q Series PLC Serial Communication Module RS-232/422/485

Mitsubishi QJ71C24 Module

Q Series Serial Communication

RS-232/422/485 PLC Module

QJ71C24

The Mitsubishi QJ71C24 Module is a Q Series Serial Communication PLC module supporting RS-232/422/485 interfaces for industrial automation data exchange and device connectivity.

Specification

SEODescription

The Mitsubishi QJ71C24 Module is a versatile Q Series Serial Communication module designed for industrial automation, supporting RS-232, RS-422, and RS-485 interfaces via two independent configurable ports. It integrates seamlessly with Mitsubishi Q Series PLCs, enabling direct communication with up to 32 devices via multi-drop networks. Operating at 5V DC within a temperature range of 0–55°C, this PLC module is ideal for manufacturing, process control, and machinery automation. Its key strengths include high-speed data transfer (up to 115.2 kbps), protocol flexibility (MC protocol, non-procedural, and bidirectional modes), and robust noise resistance. However, configuration complexity and dependency on specialized software (GX Works) may require technical expertise. The module excels in real-time monitoring and multi-device synchronization but lacks built-in isolation for harsh electrical environments.

SEOSpecification

Parameter	Specification
Model	Mitsubishi QJ71C24 Module
Series Compatibility	Q Series Serial Communication Module
Interface Standards	RS-232/RS-422/RS-485
Communication Speed	300 bps to 115.2 kbps
Data Bits	7 or 8 bits
Stop Bits	1 or 2 bits
Parity	None/Even/Odd
Protocol Support	MC Protocol, No Protocol, Bidirectional Protocol
Electrical Isolation	1500 Vrms (RS-422/485)
Connector Type	D-sub 9-pin (RS-232), Terminal Block (RS-422/485)
Operating Voltage	DC 5V ±5% (Internal Power)
Current Consumption	0.26A (5V)
Mounting Method	Q Series Base Unit Installation
Operating Temperature	0°C to 55°C
Storage Temperature	-25°C to 75°C
Weight	0.2 kg

SEOQandA

question:Can the company ensure stable supply?
answer:Yes, as Asia's leading industrial automation trader for 20 years, we maintain reliable supply chains with 85% repeat clients, ensuring consistent quality and timely delivery.
question:Why choose your company?
answer:With 20 years' expertise, we're Asia's top industrial automation trader offering reliable products and a strong reputation, backed by 85% repeat clients.
question:How reliable is your product quality?
answer:Our products are rigorously tested, backed by 20 years of trusted partnerships and 85% repeat clients, ensuring top-tier reliability.

SEOQandA_Product

question:QJ71C24 communication failure with external device
answer:Verify baud rate, data bits, and wiring compatibility (RS232/422/485). Check device parameter settings.
question:QJ71C24 protocol mismatch error
answer:Confirm protocol settings (MC, non-protocol, etc.) match the external device. Adjust protocol parameters in GX Works2.
question:Data transmission/reception errors in QJ71C24
answer:Check buffer size and processing speed. Ensure data format (ASCII/HEX) aligns with device requirements.
question:QJ71C24 not recognized by PLC
answer:Inspect DIP switch settings and module installation. Ensure correct slot position and base unit compatibility.
question:QJ71C24 ERR LED is lit
answer:Identify error code via diagnostics. Review parameter configuration, wiring, and reset the module if necessary.