I. Product Introduction

Model: 490NRP25300

Manufacturer: Schneider Electric (Schneider Electric)

Protocol: Modbus Plus (MB+), Rate 1 Mbps

Type: Point-to-Point (Point-to-Point) Fiber Repeater, Bidirectional Signal Regeneration and Amplification

Application: Extension of MB+ network in industrial long-distance and strong interference environments

II. Model Meaning

490: Modicon Communication / Network Module Series

NRP: Network Repeater

25300: Fiber Interface Version (MBPLPT/PT, compatible with multimode / single-mode)

III. Technical Parameters (Official Standards)

1. Communication Parameters

Protocol: Modbus Plus (MB+)

Baud Rate: 1 Mbps (fixed)

Topology: Point-to-Point (only supports two-point direct connection, does not support bus type)

Fiber Interface: ST Type (dual ports, independent receive and transmit)

Fiber Type: Multimode (62.5/125 μm) / Single-mode (9/125 μm) compatible

Wavelength: 850 nm (multimode) / 1310 nm (single-mode)

Maximum Distance: Multimode 500m; Single-mode 2km

2. Electrical Parameters

Power Supply: 24 VDC (19.2–30 VDC)

Power Consumption: ≤ 6 W

Connection: Terminal block (power supply) + ST Fiber Port

3. Mechanical and Environmental

Size: 130 × 272 × 350 mm (wall-mounted)

Weight: 2.875 kg

Protection: IP20 (indoor installation)

Operating Temperature: -20℃ ~ +60℃

Storage Temperature: -40℃ ~ +85℃

Humidity: 5%–80% RH (no condensation)

Certifications: CE, UL, CSA

IV. Core Functions

✅ Signal Regeneration and Amplification: Shape and amplify attenuated optical signals to extend transmission distance

✅ Electrical Isolation: Completely isolate the ground potential difference between both ends, resist EMI/RFI interference, suitable for strong interference scenarios such as near frequency converters and motors

✅ Plug-and-Play: No software configuration required, can work upon power-on, compatible with all standard MB+ devices

✅ Redundancy Compatibility: Can be dual-machine hot standby, improving network reliability

V. Applicable Scenarios

Long-distance MB+ Network: Cross-regional communication in workshops, between factories (>100m, copper wire limit)

Strong-interference Industrial Environment: Metallurgy, chemical industry, automotive welding, stamping workshops

Modicon Quantum/Premium PLC System: Remote I/O, touch screens, upper computer connection

Replacement of Copper Wire: Reduce wiring costs, avoid damage to equipment from lightning strikes and surges

VI. Typical Networking plaintext

MB+ master station (PLC) → 490NRP25300 (transmitted by ST) → optical fiber → 490NRP25300 (received by ST) → MB+ slave station (remote I/O)

VII. Notes

❌ Does not support bus topology: only point-to-point connection, cannot connect multiple repeaters in series

❌ Fixed rate: only 1 Mbps, cannot be adjusted

✅ Universal for multimode / single mode: simply replace the optical fiber to adapt to different distance requirements