The Schneider Electric 140CRA31200, also cataloged as the 140CRA31200 Ethernet RIO drop adaptor, operates as a dedicated hardware component for real-time distributed I/O data exchange within Modicon Quantum control networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model Brand | Schneider Electric |
| Origin | France |
| Weight | 0.91 kg (2.00 lb) |
| Dimensions | 167 mm width, 50 mm height |
| Operating Temp | 0 degC to 60 degC |
| Storage Temp | -40 degC to 85 degC |
| Power Consumption | Not specified (backplane powered) |
| Network Type | Ethernet |
| Communication Protocols | Ethernet/IP, Modbus TCP |
| Number of Ports | 3 |
| Topology Support | Daisy chain loop |
| IP Rating | IP20 |
Backplane Bus Communication Velocity and Firmware Flash Compatibility
The 140CRA31200 interfaces directly with the Modicon Quantum backplane to maintain deterministic I/O scan cycles across Ethernet-based remote drops. Communication velocity is bound to the backplane clock domain, ensuring synchronous update alignment between the drop adaptor and the remote I/O head adaptor. Firmware flash compatibility is limited to specific Quantum series firmware revisions; mismatched firmware may prevent RIO head recognition or induce cyclic redundancy check errors during configuration downloads.
Frequently Asked Questions
Q: Does the 140CRA31200 support hot-swap insertion into an active Quantum rack?
A: No. Backplane power must be removed prior to module insertion to prevent electrical transients that can corrupt backplane bus arbitration signals.
Q: What is the maximum daisy chain loop length supported without repeaters?
A: Total cable length must comply with Ethernet/IP standards, typically not exceeding 100 meters per segment between devices.
Q: Is the module compatible with 140CRP31200 RIO head adaptors only?
A: Yes. The 140CRA31200 is explicitly designed for operation with the 140CRP31200 head adaptor within the same system architecture.
Field Installation Guidelines
Mount the 140CRA31200 into a standard 19-inch rack using proper retention hardware. Ensure Ethernet cables are routed separately from high-voltage wiring to minimize electromagnetic interference. Shielded twisted-pair cabling is recommended, with shield drains connected to earth ground at the rack entry point. Verify all RJ45 connector latches are fully engaged before applying power. When integrating into existing systems, confirm firmware version alignment between the drop adaptor and the controlling Quantum CPU prior to commissioning.
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