Configured for high-speed Modbus Plus optical interfacing in the Modicon Quantum automation platform, the Schneider Electric 140NOM25200, also cataloged as the 140NOM25200 DIO Head-End Adaptor, provides direct physical and electrical execution of distributed I/O data exchange over fiber-optic and copper media.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 140NOM25200 |
| Brand | Schneider Electric |
| Origin | France |
| Weight | 0.4 kg |
| Dimensions | 4.1 cm x 25.4 cm x 11.4 cm |
| Operating Temp | 0…60 deg C |
| Storage Temp | -40…85 deg C |
| Power Consumption | 4 W |
| Bus Current Requirement | 750 mA |
| Ports | 1 Modbus Plus fiber optic single copper, 1 Modbus RS232 twisted pair |
| Transmission Rate | 1 Mbit/s |
| Electrical Connection | 1 RJ45 connector, 2 TX/RX connectors |
| I/O Capacity | 30 inputs / 32 outputs |
| RAM | Supported |
| Checksum | Integrated |
| Pulse Width Distortion | >= 5 ns |
| Rise/Fall Time | 20 ns |
| Dynamic Range | 20 dB |
| Detected Silence | -36 dBm |
| Sensitivity Scale | > 30 dBm |
| Wavelength | 820 nm |
| Power Loss Budget | 11 dB (62.5/125 um), 16.5 dB (100/140 um), 6.5 dB (50/125 um) |
| Optical Transmission | -16…-9 dBm (100/140 um), -19.8…-12.8 dBm (50/125 um), -3.5…110.5 dBm (62.5/125 um) |
| EMC Resistance | 10 V/m, 80…2000 MHz (IEC 801-3) |
| ESD Resistance | 4 kV contact, 8 kV air (IEC 801-2) |
| Humidity Tolerance | 95 % non-condensing |
| Max Altitude | <= 5000 m |
| Certifications | UL 508, CSA Class 1 Div 2, C-Tick, DNV, GL, GOST, RINA, RMRS |
Backplane Bus Communication and Protocol Integration
This module supports deterministic backplane bus communication within the Modicon Quantum rack, ensuring low-latency data transfer between the processor and distributed I/O subsystems. Native integration with Modbus Plus and RS232 interfaces enables consistent protocol handling without external converters. The design aligns with firmware flash compatibility requirements across multiple Quantum CPU generations, minimizing obsolescence risk during system upgrades.
Frequently Asked Questions
Q: Is the 140NOM25200 hot-swappable while the Quantum rack is powered?
A: No. The module must be installed or removed only after the rack power supply is disconnected to prevent backplane transients and optical link disruption.
Q: What is the recommended fiber type for optimal power budget performance?
A: 100/140 um multimode fiber offers the highest power loss budget at 16.5 dB, making it preferable for long-distance Modbus Plus optical runs.
Q: Does this adaptor support redundant backplane configurations?
A: Redundancy is managed at the processor and network level; the 140NOM25200 itself does not perform automatic switchover functions.
Field Installation Guidelines
Mount the module directly into the designated Quantum rack slot, ensuring the backplane connectors are fully engaged without forced insertion. For fiber-optic ports, maintain minimum bend radius of 35 mm and avoid tensile stress on the connectors. Ground the rack chassis to the facility earth grid using a low-impedance conductor. When routing copper Modbus RS232 cables, separate them from high-voltage power wiring by at least 300 mm or use grounded metal conduit to reduce EMI coupling. Verify optical signal levels with a calibrated power meter prior to commissioning.
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