Schneider 490NRP25400 Modbus‑Plus Fiber Line‑ｄｒｏｐ Repeater

The Schneider 490NRP25400 is a Modbus‑Plus fiber line‑ｄｒｏｐ repeater for Modicon Quantum automation platforms. It performs electrical‑to‑optical signal conversion for Modbus‑Plus network, extends communication distance over multimode fiber and provides ｄｒｏｐ‑point access for remote nodes, isolating heavy electromagnetic interference in noisy industrial environments.

This DIN‑rail mounted unit supports signal regeneration and multi‑node fiber network topology. Equipped with diagnostic LED indicators for link status monitoring, it is widely used for retrofitting and spare‑part maintenance in power, metallurgy and petrochemical control cabinets with long‑distance Modbus‑Plus requirements.

Main Specifications

• Brand: Schneider; Model: 490NRP25400; Type: Modbus‑Plus Fiber Line‑ｄｒｏｐ Repeater
• Applicable System: Schneider Modicon Quantum PLC automation system
• Core Tasks: Electrical‑optical conversion, Modbus‑Plus distance extension, signal regeneration, network ｄｒｏｐ‑node access, link diagnosis
• Signal Interface: D‑Sub Modbus‑Plus copper port, dual multimode ST fiber ports
• Installation: Standard DIN‑rail mounting inside industrial control cabinet
• Supported Protocol: Modbus‑Plus, data rate 1 Mbps, multimode 62.5/125μm fiber
• Operating Environment: ‑40℃ ~ +70℃, 5%‑95% RH non‑condensing, industrial anti‑vibration grade
• Mechanical: Compact cabinet‑mount housing, IP20 for indoor cabinet installation
• Certifications: CE, conforms to Modbus‑Plus industrial EMC standards

Core Functions

• Convert Modbus‑Plus electrical signals to optical signals to extend communication distance for Quantum PLC network over multimode fiber cables.
• Regenerate attenuated network signals and provide physical ｄｒｏｐ‑point for connecting remote Modbus‑Plus stations on fiber backbone topology.
• Fiber transmission achieves full galvanic isolation, effectively resisting high‑level electromagnetic interference in metallurgy and power‑plant sites.
• Front‑panel LED indicators display power status and fiber link health for fast on‑site troubleshooting and maintenance work.
• Adopt DIN‑rail mounting structure for quick installation and replacement inside standard industrial control cabinets.
• Industrial‑hardened hardware design ensures long‑term reliable continuous operation under wide‑temperature industrial environmental conditions.

Application Scenarios

• Spare‑part replacement for Schneider Modicon Quantum PLC control cabinets in power, metallurgy and petrochemical industrial sites.
• Fiber extension hardware for long‑distance Modbus‑Plus network backbone and remote ｄｒｏｐ‑node access in legacy automation projects.
• Maintenance backup inventory for renovation and after‑sales maintenance projects of legacy Modicon Quantum automation equipment.
• Matching fiber repeater cooperating with Quantum CPU, Modbus‑Plus cable assemblies and multimode fiber jumpers.
• Retrofit replacement for aged repeaters with link dropout, signal attenuation and fiber‑port damage faults.

• Global aftermarket spare supply for automation maintenance teams maintaining Schneider legacy industrial‑control equipment worldwide.