Product Overview
Precision data acquisition starts with the right input module. The 140AII33000C from Schneider Electric belongs to the Modicon Quantum series, a platform trusted across oil, gas, and heavy industrial automation. This input module captures low-level signals with a measurement current of 0.5 mA, making it a practical choice for processes where signal fidelity drives product quality and safety.
Key Parameters That Matter
Resolution and Linearity
A resolution of 0.76 µV lets this module detect extremely small signal changes. For analytical loops, flow measurement, and temperature transmitters, that sensitivity translates into tighter process control. Linearity of 0.00% means the output tracks the input across the operating range, reducing the need for field recalibration.
Input Impedance and Source Resistance
Input impedance greater than 10 mOhm keeps the module from loading down sensitive transmitters. Source resistance below 200 Ohm supports clean signal transfer from field devices. Together, these values protect measurement accuracy in electrically noisy plants.
Protection and Power
An internal fuse guards against overload events. Power dissipation of 2W keeps heat generation low inside the rack. The module draws 400 mA from the bus and withstands electrostatic discharge up to 4 kV, a useful margin in dry or high-static environments.
Where the 140AII33000C Fits
Oil and Gas Processing
Refineries and gas plants rely on accurate analog input for pressure, level, and flow loops. The 0.76 µV resolution helps capture small changes in transmitter output before they become process deviations.
Upstream and Midstream Automation
At remote wellheads and compressor stations, altitude and electrical noise challenge control hardware. A maximum operating altitude of 1000 m above sea level and 4 kV ESD resistance suit many of these installations.
Industrial Process Skids
Skid-mounted packages often need compact, reliable I/O. At roughly 0.3 kg, this module integrates easily into existing Quantum racks without adding significant load.
Installation and Setup Notes
Mount the module in a Modicon Quantum backplane and confirm the bus current budget supports the 400 mA requirement. Keep signal wiring separated from high-voltage runs to preserve the 0.76 µV resolution. Verify source resistance stays below 200 Ohm for each connected transmitter. Confirm rack grounding to support the 4 kV ESD rating.
Maintenance and Reliability
Schedule periodic inspections of terminal connections and rack ventilation. Because the module uses an internal fuse, a blown fuse indicates an overload event that deserves investigation before replacement. Low 2W dissipation reduces thermal stress on surrounding modules, supporting longer service intervals. Please verify current lifecycle status and availability with Oil AutoTech before ordering.
Selection and Integration Guidance
The 140AII33000C works within Modicon Quantum systems, and integration with plant networks may require an external gateway or connection module. Confirm cables and gateways with your supplier before commissioning. Oil AutoTech offers hands-on technical selection help and fast dispatch, worldwide, so you can keep critical loops running. Contact Oil AutoTech today for pricing and availability.
