Mitsubishi QJ71LP21S-25 Network Module for MELSEC-Q Series

The Mitsubishi QJ71LP21S-25 (QJ71LP21S-25) is a network communication module designed for use with Mitsubishi MELSEC-Q series programmable logic controller systems. Operating within the modular MELSEC-Q platform, this unit functions to establish network connectivity and facilitate critical data exchange between controllers and distributed industrial automation equipment. It is engineered for installation into compatible MELSEC-Q base units, allowing seamless integration within control racks for automated production lines, process control systems, and complex manufacturing machinery. This module is utilized primarily for replacement, maintenance, and system upgrade requirements where maintaining exact hardware compatibility is vital to avoid production downtime. According to available specifications, the unit has a net weight of approximately 10 kg. It provides a reliable communication link across connected automation architectures, supporting continuous operations in demanding factory automation settings. Prior to installation, verify the part number and existing rack configuration to ensure full compatibility with your MELSEC-Q controller assembly and network topology.