Description
Application Scenarios
In a large petrochemical plant, the central control room stood over 300 meters away from the field instrument marshalling cabinets. The legacy S908 coaxial RIO system suffered from electromagnetic interference and bandwidth limitations, triggering nuisance process shutdowns. The plant engineering team replaced the coaxial head adapter with a 140CRP31200 in the local rack and deployed 140CRA31200 adapters at each remote substation. The module faithfully collected input data from remote I/O racks and published them to the main controller via EtherNet/IP. The deterministic scanning eliminated unpredictable jitter, and the dual-device network ports provided a self-healing daisy-chain loop—if one cable segment was damaged, the 140CRA31200 automatically rerouted traffic through the alternate path. The plant reported zero communication-related trips in the first six months of operation.
In a municipal water treatment facility serving a metropolitan area, the SCADA system needed to poll real-time data from dozens of remote pump stations spread across a 50-kilometer pipeline. Each pump station housed a Quantum PLC rack with a 140CRA31200 as the remote I/O adapter. The module’s Modbus TCP service port allowed the SCADA master to access diagnostic data directly, while the EtherNet/IP device ports handled high-speed deterministic I/O scanning. This dual-protocol capability eliminated the need for separate communication gateways, simplifying the network architecture and reducing hardware costs.
Parameters
| Parameter | Value/Description |
|---|---|
| Product Model | 140CRA31200 |
| Manufacturer | Schneider Electric |
| Product Category | Ethernet RIO Drop Adapter |
| Product Family | Modicon Quantum |
| Number of Ports | 3 integrated 10/100 Base-T Ethernet ports |
| Communication Protocol | EtherNet/IP, Modbus TCP |
| Network Topology | Daisy chain loop (redundant ring-capable) |
| Max Implicit I/O Frame Size | 1,400 bytes |
| Backplane Power Consumption | 1.2 A at 5 V DC (approx. 6 W) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Protection Rating | IP20 |
| Dimensions (W×H) | 167 mm × 50 mm |
| Net Weight | 0.554 kg |
| Certifications | CE, UL 508, C-Tick, Class I Division 2 |
