QJ71LP21S-25 Profibus-DP Master Module - Mitsubishi Melsec Q Series PLC Network Interface | Industrial Communication Device

QJ71LP21S-25

MELSEC PLC module

CC-Link interface

QJ71LP21S-25

The QJ71LP21S-25 is a MELSEC PLC module with CC-Link interface, enabling high-speed industrial network communication for real-time control and data exchange. Designed for system integration in automation setups, it supports reliable connectivity in harsh environments. Compact and modular for easy installation in MELSEC-Q series PLC racks.

Specification

SEODescription

The QJ71LP21S-25 is a MELSEC PLC module featuring a CC-Link interface for high-speed industrial network communication. Designed to function as a master station, it supports up to 64 remote modules with a maximum data rate of 10 Mbps over distances extending to 1,200 meters using dedicated cables. Operating at 24 VDC within a temperature range of 0–55°C, it excels in harsh industrial environments such as automotive manufacturing, process control, and assembly lines. The module offers seamless integration with Mitsubishi's PLC systems, enabling real-time data exchange and centralized control. Key advantages include robust noise immunity, flexible topology support, and simplified diagnostics, though its dependency on CC-Link-specific hardware and limited compatibility with non-MELSEC devices may pose constraints for mixed-platform setups.

SEOSpecification

Parameter	Specification
Model Number	QJ71LP21S-25
Module Type	MELSEC PLC Module (CC-Link Interface)
Network Type	CC-Link
Transmission Speed	10 Mbps (Maximum)
Maximum Stations	64 stations per network
Communication Distance	100m (at 10Mbps, with CC-Link dedicated cable)
Protocol Support	CC-Link Ver.1 and Ver.2 compatible
Power Supply	5VDC (via PLC base unit)
Current Consumption	100mA (Typical)
Operating Temperature	0°C to 55°C
Storage Temperature	-25°C to 75°C
Humidity	10% to 90% (non-condensing)
Protection Class	IP2X
Mounting	DIN rail or screw mounting
Certifications	CE, UL, cUL
Weight	Approx. 200g
Compatible PLC Series	MELSEC-Q Series

SEOQandA

question:Why is the shipping cost high? Are there cheaper options?
answer:Shipping costs depend on weight/destination. We offer sea/land freight for lower rates. Contact us for discounts.
question:Can you share shipment photos or procurement details?
answer:Sample photos and estimated lead times can be provided. Specific details are confirmed upon order placement.
question:What is included in the warranty?
answer:Warranty covers manufacturing defects. Duration varies by product. Terms provided post-purchase.

SEOQandA_Product

question:How to resolve communication failure between QJ71LP21S-25 and Profibus slaves?
answer:Check baud rate settings, cable integrity, and ensure correct slave configuration in GX Works2.
question:Why does QJ71LP21S-25 show 'ERR' LED status?
answer:Verify module parameters, power supply stability, and diagnose using GX Works2 for specific error codes.
question:How to fix node address conflicts in QJ71LP21S-25 network?
answer:Ensure unique addresses for all Profibus slaves and update configuration in the master module settings.
question:Why is QJ71LP21S-25 not recognizing connected slaves?
answer:Confirm GSD files are correctly imported and slave devices are properly powered and connected.
question:How to update firmware on QJ71LP21S-25 module?
answer:Use Mitsubishi's dedicated firmware update tool and follow the provided documentation for step-by-step guidance.