II. Product Parameters

Model: 490NRP95400

Protocol: S908 RIO (Quantum-specific Remote I/O Protocol)

Electrical Interface: 1×F-type (Coaxial, RIO Bus)

Optical Interface: 2×ST optical interface (Transmit and Receive are Independent)

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

Transmission Distance: Multimode 2km; Single-mode up to 20km

Power Supply: 24 VDC (19.2–30 VDC) or 115/230 VAC

Power Consumption: ≤8 W

Weight: Approximately 1.5 kg

Size: 168 × 119 × 56 mm

Operating Temperature: −20℃ ~ +60℃

Certifications: CE, UL, CSA, RoHS

III. Product Specifications

Type: S908 RIO Optical Splitter Repeater (Passive Signal Forwarding, No Delay)

Topology: Point-to-Point, Bus Type (Multiple Repeater Cascade)

Isolation: Complete Photoelectric Isolation, Eliminating Ground Potential Difference and EMI Interference

Installation: Panel / Rack Installation, IP20 Protection

Diagnosis: LED Indicators (Power Supply, Transmit and Receive, Fault)

IV. Series

Series归属： Modicon 490 Communication Series → NRP (Network Repeater) Sub-Series

Same Series Positioning：

490NRP25300/25400： Modbus Plus (MB+) Optical Repeater

490NRP95400： S908 RIO Specialized Optical Repeater (Quantum Platform)

V. Features

✅ S908 RIO Specific： Compatible with Quantum Native Remote I/O Bus， Seamless Compatibility

✅ Ultra-long Distance： Single-mode optical fiber up to 20km， Breaking through the 100m limit of coaxial cable

✅ Passive Low Delay： Direct Signal Forwarding， No Protocol Conversion， Zero Extra Delay

✅ Strong Anti-interference： Photoelectric Isolation， Resisting Strong Electromagnetic Noise from Frequency Converters， Motors， etc.

✅ Flexible Power Supply： Supports AC/DC Dual Power Supply， Suitable for Different On-site Power Conditions

VI. Applications

Extend the communication distance of S908 RIO bus， connect remote I/O stations across workshops / factories

Electrical Isolation： Eliminate Ground Potential Difference， Protect Quantum PLC and Remote I/O Modules

Build Optical RIO Network， Replace Interfered Coaxial Cables

Bus Cascade： Connect multiple repeaters in series to expand large-scale distributed I/O system

VII. Application Domains

Power Energy： Power Plant DCS， Generator Control， Remote I/O Monitoring

Petrochemical： Refining Plants， Explosion-proof Areas， Long-distance Pipeline Monitoring

Metallurgy and Steel： Blast Furnaces， Rolling Mills， Continuous Casting Lines， etc. Strong Interference Environment

Water Treatment： Sewage Plants， Pump Stations Distributed I/O Control System

Large-scale Manufacturing： Automotive， Building Materials， etc. Workshop-level Remote I/O Communication