Product Overview
The Schneider Electric 140CRA31908 is an Ethernet RIO Drop Adaptor from the Modicon Quantum series. This device provides digital connectivity for remote I/O drops in automation systems. It operates on a rated voltage of 5 VDC and a rated current of 1.2 A, with a maximum power rating of 6 W. Equipped with three Ethernet ports, it supports two communication protocols: EtherNet/IP and Modbus TCP. This adaptor is ideal for integrating Modicon Quantum systems with modern Ethernet-based control networks, offering reliable data collection and output updates.
Technical Specifications Breakdown
Key parameters for the 140CRA31908 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Rated Voltage | 5 VDC |
| Rated Current | 1.2 A |
| Rated Power | 6 W |
| Number of Ethernet Ports | 3 |
| Communication Protocols | EtherNet/IP and Modbus TCP |
| Protection Category | IP20 |
| Ambient Temperature Range | 0 to 60 °C |
| Operating Humidity | 80% (non-condensing) |
| Operating Altitude | 2000 m |
| Number of LEDs | 4 |
Industry Applications
This adaptor is well-suited for manufacturing plants where Modicon Quantum controllers need to interface with remote I/O over Ethernet. For example, in a conveyor system, the 140CRA31908 can collect sensor data and update output modules via a daisy chain loop topology. In process control, it enables seamless integration with EtherNet/IP or Modbus TCP networks, reducing wiring costs and improving flexibility. The IP20 protection makes it suitable for clean indoor environments like control cabinets.
Installation & Setup Guidance
Mount the adaptor in a dry, ventilated enclosure within the specified ambient temperature range (0 to 60 °C) and humidity (80% non-condensing). Connect the three Ethernet ports using standard CAT5e or higher cables. Use the integrated connection types: Ethernet IP/Modbus TCP service port and device network. The adaptor supports daisy chain loop and S908 bus topologies. Ensure the power supply provides stable 5 VDC at 1.2 A. The four LEDs (Mod Status, Net Status, RUN, I/O) help verify proper operation during commissioning.
Maintenance & Reliability
Periodically inspect the adaptor for dust accumulation and ensure the IP20 enclosure remains intact. Verify that ambient conditions stay within the 0 to 60 °C range and humidity below 80%. The unit is designed for altitudes up to 2000 m. For storage, keep temperatures between -40 and 85 °C. No specific maintenance schedule is required beyond routine visual checks.
Compatibility & Integration
The 140CRA31908 is compatible with Modicon Quantum controllers and M580 systems. It supports BMEP586040, BMEH584040, BMEP585040, BMEH586040, and BMEP584040 processors. The adaptor provides the ability for an M580 system to control Modicon S908 coaxial bus. It collects input data and publishes it to the remote I/O head adaptor, while output modules receive updates from the head adaptor. Communication protocols include EtherNet/IP and Modbus TCP.
Selection Guide & Purchasing Advice
When selecting this adaptor, verify that your system requires a 5 VDC supply and supports EtherNet/IP or Modbus TCP. The 140CRA31908 is ideal for upgrading legacy S908 bus systems to Ethernet. For lifecycle status, please verify current availability with SpareTechPLC before ordering. SpareTechPLC offers this part with fast shipping and expert support.
Troubleshooting & Common Issues
If the Mod Status LED is red, check the 5 VDC power supply and connections. A red Net Status LED indicates network communication issues; verify Ethernet cable integrity and protocol settings (EtherNet/IP or Modbus TCP). If the I/O LED is red, inspect the remote I/O head adaptor and bus cabling. Ensure the ambient temperature does not exceed 60 °C to avoid thermal shutdown.
