When a Remote I/O Drop Goes Dark
A gas compression station loses communication with its Modicon Quantum rack. The DIO drop interface has failed, and the control room is blind to valve and pressure data. That is the exact problem the Schneider Electric 140CRA21100 solves. This Modicon Quantum interface module manages a DIO drop interface over a single port, linking remote I/O to the host controller with a 115/230 VAC supply.
What the 140CRA21100 Does
The 140CRA21100 is an interface module in Schneider Electric’s Modicon Quantum automation platform. It carries one single port for DIO drop connectivity. The unit accepts 115/230 VAC rated supply voltage and tolerates an operational range of 85 to 276 VAC, so it rides through the voltage sag common on aging plant power. Supply frequency spans 47 to 63 Hz. Maximum supply current draws 0.2 A at 115 V or 0.4 A at 230 V, with inrush current of 10 A at 115 V and 20 A at 230 V. Rated power is 50 VA, and the associated fuse rating is 1.5 A.
Technical Specifications
| Specification | Value |
|---|---|
| Product Line | Modicon Quantum |
| Module Type | DIO drop interface |
| Number of Ports | 1 single |
| Rated Supply Voltage | 115/230 VAC |
| Supply Voltage Limits | 85…276 V |
| Supply Frequency | 47…63 Hz |
| Maximum Supply Current | 0.2 A at 115 V; 0.4 A at 230 V |
| Inrush Current | 10 A at 115 V; 20 A at 230 V |
| Rated Power | 50 VA |
| Associated Fuse Rating | 1.5 A |
| Output Voltage | 5.1 V |
| Nominal Output Current | 3 A |
| I/O Words | 30 input / 32 output |
| Power Dissipation | 11 W |
| Operating Temperature | 32…140 °F (0…60 °C) |
Where It Fits in Oil, Gas, and Industrial Automation
The 140CRA21100 suits remote I/O architectures where the controller sits far from field devices. In upstream oil and gas, it supports wellhead control panels that must report status across long cable runs. In pipeline compression, it keeps DIO drops synchronized with the main Quantum rack. In water treatment and factory automation, the 30 input and 32 output words give enough density for pump, valve, and interlock monitoring without adding racks. The wide 85 to 276 VAC supply range means the module tolerates the voltage swings common on rural or generator-backed power.
Integration and Installation Notes
The 140CRA21100 mounts in standard Modicon Quantum backplanes, including 2, 3, 4, 6, 10, and 16 position configurations. It connects through a 7-pole terminal block. Startup diagnostics check RAM address, checksum, and RAM, and run-time diagnostics repeat those checks. The module includes short-circuit protection and output overvoltage protection. It resists electrostatic discharge at 4 kV contact and 8 kV air per IEC 801-2, and electromagnetic fields at 10 V/m from 80 to 2000 MHz per IEC 801-3. Operating altitude reaches 5000 m, relative humidity to 95% without condensation, and storage temperature spans -40 to 185 °F (-40 to 85 °C). Protective treatment is TC. Standards include UL 508, with certifications covering GOST, C-Tick, UL, DNV, and CSA Class 1 Division 2.
Sourcing the 140CRA21100 Without Downtime
When a DIO drop interface fails, production waits. Oil AutoTech stocks and dispatches spares when you need them, with fast dispatch, worldwide. Our team provides hands-on technical selection help to confirm the 140CRA21100 matches your backplane and supply configuration. Contact Oil AutoTech today for pricing and availability.
Please verify current lifecycle status and availability with Oil AutoTech before ordering.
