Description:

The Mitsubishi QJ71LP21-25 Link Unit Networking Module is used in industrial automation systems to enable high-speed data communication over MELSECNET/10 fiber optic networks between PLC stations. Commonly installed in large-scale production lines, process control systems, and distributed automation setups requiring reliable long-distance communication. Maintenance teams, OEMs, and system integrators use this part for system expansion, replacement, and upgrading network communication infrastructure.

Applications:

The Mitsubishi QJ71LP21-25 module is widely used in industrial environments where stable and high-speed network communication is critical. It is commonly applied in factory automation systems, material handling systems, power plants, and process industries where multiple PLCs and devices must communicate over long distances using fiber optic networks.

Technical Specifications:

• Manufacturer Part Number (MPN): QJ71LP21-25
• Product Type: PLC Networking Module (Fiber Optic Link Unit)
• Series: MELSEC-Q
• Network Type: MELSECNET/10
• Transmission Medium: Fiber optic cable
• Communication Speed: Up to 10 Mbps
• Maximum Distance: Up to 25 km (depending on configuration)
• Topology: Ring / loop configuration
• Number of Stations: Supports multiple network nodes
• Mounting: Rack-mounted (Q-series base unit)
• Compatibility: Mitsubishi MELSEC-Q Series PLC

Common Replacements:

• Mitsubishi QJ71LP21
• Mitsubishi QJ71LP21G
• Mitsubishi QJ71BR11