When a Remote Drop Goes Dark, Production Stops
A plant engineer faces a familiar problem: a Modicon Quantum remote I/O drop loses communication, and an entire process line sits idle. The fix often comes down to one module — the interface that links the drop to the rest of the system. The Schneider Electric 140CRA21110C is built for exactly that role.
This DIO drop interface belongs to the Modicon Quantum automation platform. It carries a single port and runs on a dual supply voltage of 115 or 230 V AC, so it fits installations where only one of those supplies is available. That flexibility matters when you are restoring a drop under time pressure.
What the 140CRA21110C Delivers
Power That Tolerates Real-World Conditions
The supply voltage limits span 85 to 276 V, which means the module keeps working through the sags and swells common on plant power. The supply frequency range of 47 to 63 Hz covers both common industrial frequencies without adjustment. Rated power sits at 50 VA, and a 1.5 A associated fuse rating adds a layer of current protection.
Regulated Output and Built-In Protection
Output is regulated at 5.1 V with a nominal output current of 3 A and a minimum load current of 0 A. Short-circuit protection and output overvoltage protection are both included, which reduces the risk of a single fault taking down the drop. Power dissipation is 11 W.
Diagnostics You Can Act On
Startup diagnostics check checksum and RAM address, and run-time diagnostics repeat those checks. When a fault appears, this gives maintenance teams a clear starting point instead of guesswork.
Where This Module Fits
Oil and Gas Remote I/O
Remote drops in oil and gas facilities often sit far from the control room. The 140CRA21110C supports that architecture with a single port and a supply range that handles long cable runs and variable plant power.
Upgrading an Aging Quantum Drop
If you are replacing a failed interface in an existing Quantum rack, this module drops into standard-format slots. Typical backplanes include 16, 10, 6, 4, 3, and 2 positions, so it suits a range of rack layouts. The I/O word capacity is 30 inputs and 32 outputs.
High-Altitude and Harsh Environments
The module operates at altitudes up to 5000 m and handles ambient temperatures from 0 to 60 °C. Storage temperature spans -40 to 85 °C, and relative humidity reaches 95 % without condensation. Conformal coating (Humiseal 1A33) and protective treatment TC add durability in demanding settings.
Integration and Installation Notes
A 7-pole terminal block handles connections. The module meets UL 508 and carries certifications including GOST, CSA Class 1 Division 2, DNV, UL, and C-tick. Resistance to electrostatic discharge is rated at 4 kV contact and 8 kV on air per IEC 801-2, with electromagnetic field resistance of 9.1 V/m (10 V/m) from 80 to 2000 MHz per IEC 801-3.
Before ordering, confirm your rack position count, supply voltage, and terminal block wiring match your existing setup. If you are unsure, the team at Oil AutoTech can help you verify compatibility.
Getting the Right Module Fast
Downtime costs more than the part. Oil AutoTech supplies spares when you need them, with fast dispatch, worldwide. Whether you are restoring a single drop or stocking critical spares, the 140CRA21110C is ready-to-ship.
Please verify current lifecycle status and availability with Oil AutoTech before ordering. Contact Oil AutoTech today for pricing and availability.
