Introduction: Solving Distance and Noise Challenges in Industrial Networks
When electromagnetic interference or distance limitations disrupt your control network, the Schneider 140NRP31200 Ethernet Fiber Converter provides a reliable solution. This Modicon series device converts copper Ethernet signals to fiber optic, enabling communication over long runs while eliminating noise pickup. With two multi-mode fiber ports operating at 1310 nm and two RJ-45 Ethernet interfaces, it bridges the gap between local controllers and remote I/O or drives.
Technical Specifications Breakdown
Optical Performance
- Fiber Type: Multi-mode
- Wavelength: 1310 nm
- Receiver Sensitivity: -30 dBm
- Maximum Distance: 2000 m (with 50/125 µm fiber) or 3000 m (with 62.5/125 µm fiber)
These specs ensure the 140NRP31200 maintains signal integrity across long plant floors or between buildings. The -30 dBm sensitivity allows reliable reception even with attenuated signals.
Electrical Characteristics
- Power Dissipation: 5 W
- Inrush Current: 1 A at 5 V DC
- Bus Current Requirement: 1000 mA
The low 5 W dissipation keeps heat manageable in crowded cabinets. The 1 A inrush is typical for DC-powered modules; ensure your 5 V supply can handle the momentary surge.
Physical and Environmental
- Dimensions: 250 mm (height) x 40.34 mm (width) x 103.85 mm (depth)
- Weight: 0.554 kg (1.221 lb)
- Operating Temperature: 0 to 60 °C
- Storage Temperature: -40 to 85 °C
- Humidity: 0 to 95% non-condensing
- Altitude: Up to 2000 m
Compact and rugged, the 140NRP31200 fits standard Quantum racks and tolerates harsh industrial environments.
Industry Applications
Long-Distance Remote I/O Links
In a water treatment plant, the 140NRP31200 connects a remote pump station 2 km away to the main PLC. The fiber link eliminates ground loops and lightning surge risks that plague copper runs.
Noise-Free Drive Communication
In a steel mill with variable frequency drives generating intense EMI, this converter isolates the control network. The multi-mode fiber provides galvanic isolation, preventing drive noise from corrupting data.
Installation and Setup Guidance
1. Mounting: Install the module in a Modicon Quantum rack. Ensure adequate airflow around the unit (0 to 60 °C ambient).
2. Fiber Connections: Use LC connectors with clean, dust-free end faces. For 2000 m range, use 50/125 µm fiber; for 3000 m, use 62.5/125 µm fiber.
3. Ethernet Cabling: Connect standard Cat5e/6 cables to the RJ-45 ports. The ports auto-negotiate speed and duplex.
4. Power: Supply 5 V DC from the rack backplane. Verify the bus current does not exceed 1000 mA.
5. LED Indication: After power-up, check the green RDY LED. Green STS1/STS2 indicate active fiber links; green FX1 ACT/FX2 ACT show data activity.
Maintenance and Reliability
To maximize uptime, perform these checks:
- Quarterly: Inspect fiber connectors for dust or damage. Clean with appropriate lint-free wipes.
- Annually: Verify ambient temperature stays within 0–60 °C. Check rack power supply output.
- As needed: Monitor LED status. A red ERR LED signals internal fault; consult the manual.
The 140NRP31200 dissipates only 5 W, reducing thermal stress. Its polycarbonate housing resists impact and chemical exposure.
Compatibility and Integration
This converter integrates seamlessly with:
- Schneider Modicon Quantum automation platform
- Any Ethernet/IP or Modbus TCP network via the RJ-45 ports
- Fiber optic networks using standard multi-mode LC connectors
It works as a standalone media converter or as part of a larger Quantum control system. The two fiber ports allow daisy-chaining or redundant ring topologies.
Selection Guide and Purchasing Advice
Before ordering the 140NRP31200, confirm:
- Fiber type: Multi-mode only (single-mode requires a different model)
- Distance requirement: Up to 3000 m with 62.5/125 µm fiber
- Power supply: 5 V DC available from your Quantum rack
- Certifications needed: CE, CSA, UL 508, FM Class 1 Div 2, TÜV, C-tick
SpareTechPLC stocks the 140NRP31200 and can advise on compatible fiber patch cables and rack accessories. Contact our team for current lead times and bulk pricing.
Frequently Asked Questions
Q: Can the 140NRP31200 connect single-mode fiber?
A: No, this model is designed for multi-mode fiber only. Using single-mode fiber will not achieve the specified distances.
Q: What is the maximum distance between two transceivers?
A: 2000 m with 50/125 µm fiber or 3000 m with 62.5/125 µm fiber, as stated in the specifications.
Q: Does the module require external power?
A: No, it draws 5 V DC from the Quantum rack backplane. The bus current requirement is 1000 mA.
Q: What do the LEDs indicate?
A: Green RDY = module ready; red ERR = internal fault; green STS1/STS2 = fiber link active; green FX1 ACT/FX2 ACT = data activity on respective channels.
Q: Is the 140NRP31200 CE marked?
A: Yes, it carries CE marking and also complies with CSA, UL 508, FM Class 1 Div 2, TÜV, and C-tick standards.
