Part Code Definition

1C31xxx = Ovation standard remote I/O personality module series;

227 = model code for 8-channel 4-20mA analog input card;

G01 = fixed factory hardware revision version.

Technical Specifications

Backplane powered by rack 5VDC bus, field loop powered or local auxiliary 24VDC optional;

8 fully isolated independent input channels, fixed input range: 4~20mA DC current signal;

A/D conversion resolution:14-bit, full-scale precision ≤±0.15% at 25℃ ambient;

Dielectric isolation: 1500VAC galvanic isolation between channel vs backplane and inter-channels;

Sampling rate: 20Hz (60Hz noise filtering) /25Hz (50Hz noise filtering), CMRR≥120dB, NMRR≥60dB;

Operating environment: -40℃~+70℃, 5%~90%RH non-condensing; supports hot-swap on standard Ovation I/O rack; net weight approx 0.36kg.

Interface & Communication Layout

Rear gold finger docks with corresponding base module to connect rack backplane system bus;

Front screw terminal block for field transmitter shielded cable wiring;

Front panel LED indicators: RUN operating lamp, module fault alarm and channel open-circuit status indication.

Core Functions

Real-time analog signal acquisition & A/D conversion for flow, pressure, temperature transmitters;

Per-channel open-circuit detection, overload protection, single-channel abnormal state no interference to other 7 channels;

Built-in hardware self-diagnosis for module power fault, channel out-of-range, open loop, all fault codes uploaded to Ovation controller automatically;

Support periodic automatic self-calibration triggered by DCS configuration software to maintain long-term measuring accuracy.

Application Scenarios

Boiler feedwater flow, furnace pressure, steam temperature real-time collection in thermal power plants; refining pipeline pressure, tank level, reaction temperature signal acquisition for petrochemical DCS system expansion and spare replacement.

Operation & Maintenance Notes

Field signal wiring adopts shielded twisted-pair cable with single-end shielding grounded inside control cabinet;

Separate analog signal wires from high-power AC cables to avoid electromagnetic interference;

Check terminal fastening tightness and loop current value during regular maintenance; replace module once persistent hardware diagnostic alarm occurs.