The 140CRA93200 is a Remote I/O (RIO) drop adapter for the Modicon Quantum automation platform. It enables distributed I/O expansion by connecting a remote Quantum rack to a central PLC processor over a coaxial S908 Remote I/O network. Designed for deterministic, high-reliability communication, the module ensures synchronized I/O updates across geographically distributed industrial systems.
The 140CRA93200 interfaces the remote Quantum backplane with an S908 RIO head module, managing time-critical data exchange with minimal latency. It maintains deterministic I/O behavior required for high-availability and continuous-process applications.
| Parameter | Specification |
|---|---|
| Series | Modicon Quantum |
| Model | 140CRA93200 |
| Function | Remote I/O (RIO) Drop Adapter |
| Communication Protocol | S908 Remote I/O |
| Transmission Rate | 1.544 Mbit/s |
| Media Interface | Dual coaxial F-connectors (redundant) |
| Backplane Support | Full Quantum I/O rack (per head processor limits) |
| Backplane Current | 750 mA @ 5 VDC (typical) |
| Addressing | Rear rotary switches (Drop address 1–31) |
| Maximum Cable Length | Up to 15,000 ft (4,500 m) with repeaters |
| Diagnostics | LED indicators: Ready, Run, Modbus Plus, Comm Error |
| Maintenance Feature | Front sliding door with label area |
The 140CRA93200 supports hot swap in most Quantum configurations, allowing replacement without powering down the entire system (application permitting temporary RIO drop loss). The front-panel protective door safeguards internal components while allowing clear field labeling.
Commonly used in distributed automation architectures, including:
Large process plants
Power generation and substations
Water and wastewater treatment
Material handling systems with remote I/O islands
Does this module support Modbus Plus communication?
Yes. The module includes an integrated Modbus Plus (RS-485) port for programming terminals or HMI connections at the remote drop.
Can the 140CRA93200 be used as a standalone PLC interface?
No. This is a RIO drop module and must be paired with a RIO head module (e.g., 140CRP93100 or 140CRP93200) located at the CPU rack.
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