QJ71FL71-B2 Mitsubishi MELSEC FL-net Module, PLC Communication Card, Industrial Network Interface

QJ71FL71-B2

Mitsubishi FL-net Module

MELSEC Q Series PLC

QJ71FL71-B2

The QJ71FL71-B2 Mitsubishi FL-net Module enables high-speed FL-net communication for MELSEC Q Series PLCs, ensuring real-time data exchange and seamless integration in industrial automation systems.

Specification

SEODescription

The QJ71FL71-B2 is a Mitsubishi FL-net Module designed for the MELSEC Q Series PLC, providing seamless integration with FL-net (OPCN-2) networks for real-time industrial automation control. It supports up to 64 nodes per network segment and operates at 100 Mbps via Ethernet, enabling high-speed data exchange between PLCs, drives, and sensors. The module interfaces directly with the Q Series base unit, requiring a 5V DC internal power supply and operating within 0–55°C. Ideal for automotive, robotics, and process industries, it offers robust synchronization and scalability for distributed systems. Key advantages include low latency, compliance with Japanese FA standards, and compatibility with Mitsubishi’s engineering tools. However, its configuration requires expertise in FL-net protocols, and its application is limited to environments adhering to OPCN-2 specifications.

SEOSpecification

Parameter	Specification
Product Model	QJ71FL71-B2
Module Type	Mitsubishi FL-net Module
Applicable Series	MELSEC Q Series PLC
Communication Protocol	FL-net (Based on Ethernet)
Transmission Speed	100 Mbps
Interface	RJ45
Maximum Nodes	256 nodes per network
Operating Voltage	24 VDC ±10%
Power Consumption	5 W
Mounting Method	Q Series Base Unit Installation
Weight	0.2 kg
Operating Temperature	0 to 55°C
Certification	CE, UL, cUL

SEOQandA

question:Can the company provide technical selection services?
answer:Yes, we offer technical selection guidance to help clients choose optimal product configurations based on project requirements and compatibility.
question:What is the warranty period?
answer:Standard warranty is 12 months from delivery, covering material and manufacturing defects under normal usage conditions.
question:Can you provide shipment photos and purchase dates for similar products?
answer:Yes, we share anonymized shipment records including photos and timelines upon request to ensure transparency.

SEOQandA_Product

question:Unable to establish communication with QJ71FL71-B2 module?
answer:Verify IP settings, subnet mask, and physical connections. Ensure PLC parameters match network configuration.
question:QJ71FL71-B2 shows 'E001' error code during operation?
answer:Reset the module and check network cables. Replace damaged cables or ensure proper termination.
question:Intermittent data loss with QJ71FL71-B2?
answer:Check for electromagnetic interference, shorten cable length, or use shielded twisted-pair cables.
question:QJ71FL71-B2 fails to recognize connected devices?
answer:Confirm FL-net node settings and refresh cycle configuration. Recheck device addressing and network topology.
question:How to update firmware on QJ71FL71-B2?
answer:Download latest firmware from Mitsubishi's support site. Use GX Works2 or dedicated updater tool for installation.