Description
The Schneider 140CRA21110 is a dedicated DIO (Distributed I/O) Drop Interface module designed for the Modicon Quantum automation platform . This single-port module serves as the communication gateway between a remote I/O drop (chassis) and the main Quantum CPU over a S908 Remote I/O (RIO) network . Its primary function is to manage data exchange for up to 30 input words and 32 output words, converting the parallel backplane data of a remote chassis into a serial format for transmission to the central controller .
Application Scenarios
In a large automotive assembly plant, control cabinets are often spread across vast production floors. Running hundreds of individual sensor and actuator wires back to a central controller is expensive and prone to interference. By deploying the Schneider 140CRA21110 in a remote I/O drop, all I/O modules in that cabinet communicate with the main Quantum CPU over a single coaxial cable, significantly reducing wiring costs and installation time.
In a water treatment facility, the distribution of pumps, valves, and sensors across multiple basins requires distributed control. The 140CRA21110 is installed in each remote drop, acting as the “communication manager” that collects field data and passes it to the main controller . The module’s built-in startup and runtime diagnostics, including RAM checksum verification, ensure high system availability by immediately flagging communication errors . This capability is crucial for maintaining process integrity and preventing unexpected downtime in critical applications.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 140CRA21110 |
| Manufacturer | Schneider Electric |
| Product Category | DIO Drop Interface / Remote I/O Adapter |
| Network Ports | 1 single port (S908 RIO) |
| Rated Supply Voltage | 115/230 V AC (85…276 V AC range) |
| Supply Frequency | 47…63 Hz |
| Maximum Supply Current | 0.2 A @ 115 V / 0.4 A @ 230 V |
| Inrush Current | 10 A @ 115 V / 20 A @ 230 V |
| Output Voltage (Backplane) | 5.1 V DC (regulated) |
| Nominal Output Current | 3 A |
| I/O Words Capacity | 30 Input / 32 Output words |
| Power Dissipation | 11 W |
| Compatible Backplanes | 2, 3, 4, 6, 10, 16 positions |
| Diagnostics | Startup/Runtime RAM, Address, Checksum checks |
| Connections – Terminals | 7-pole terminal block for AC power |
| Operating Temperature | 0…60 °C |
| Protective Treatment | TC (conformal coating) |
| Certifications | UL 508, CSA Class 1 Div 2, DNV |
Technical Principles and Innovative Values
Innovation Point 1: Integrated Power Supply for Remote Chassis. The Schneider 140CRA21110 is not just a communication adapter; it features a built-in AC/DC power supply that converts the incoming 115/230V AC field power into a regulated 5.1V DC output to power the backplane of the remote drop . This integrated design eliminates the need for a separate power supply module in the remote rack, simplifying the bill of materials and reducing cabinet space requirements.
Innovation Point 2: Deterministic S908 RIO Communication. The module uses the S908 Remote I/O protocol, a deterministic fieldbus optimized for real-time control in the Quantum platform. The 140CRA21110 ensures that I/O data from up to 32 words is transmitted reliably between the remote drop and the controller, providing predictable scan times essential for time-critical applications .
Innovation Point 3: Comprehensive Onboard Diagnostics. The Schneider 140CRA21110 provides extensive diagnostic capabilities for ease of maintenance. It runs automatic checks on RAM and data checksums during startup and continuously during runtime . This allows the module to proactively alert the system to potential internal faults, significantly reducing troubleshooting time in the field.
Innovation Point 4: Industrial-Grade Durability. Engineered for harsh environments, the 140CRA21110 features a conformal coating (TC treatment) to protect against moisture, dust, and chemical contamination . It is certified to withstand high levels of electrostatic discharge (4 kV contact, 8 kV on air) and electromagnetic fields (up to 10 V/m) , guaranteeing reliable operation in electrically noisy industrial environments.
