1C31166G02 high-precision analog input module

1C31166G02 is a high-precision analog input module developed by Westinghouse (now integrated into Emerson Automation Solutions) for its Ovation Distributed Control System (DCS). It is specialized in accurately acquiring, conditioning, and transmitting low-level temperature signals—specifically from thermocouples (TC) and resistance temperature detectors (RTD)—making it a core component for direct temperature monitoring in harsh industrial environments like power plants, petrochemical refineries, and metallurgical sites. Below is its detailed information:

1. Core Technical Specifications

Parameter Category	Specific Details
Input Channels	8 independent isolated analog input channels; each channel is electrically isolated from others and the system backplane. This design eliminates cross-interference between temperature signals, ensuring measurement accuracy.
Supported Input Signals	- Thermocouple (TC): Compatible with common industrial TC types, including J, K, T, E, R, S, and B. It covers a wide temperature range from -200°C (T-type, for low-temperature scenarios) to 1800°C (B-type, for high-temperature smelting).- Resistance Temperature Detector (RTD): Supports Pt100 (385Ω/°C), Pt1000, and Ni100. It adapts to 2-wire, 3-wire, and 4-wire wiring modes—3/4-wire modes eliminate lead resistance errors, critical for high-precision applications (e.g., reactor wall temperature).- Optional: 4–20mA DC current signals (for connecting temperature transmitters, expanding compatibility with indirect temperature measurement setups).
Measurement Accuracy	- TC signals: ±0.1°C (for J/K/T/E types at 0–500°C) + ±0.1% of the measured value, ensuring precise capture of temperature fluctuations in key processes.- RTD signals: ±0.05°C (for Pt100 at 0°C) + ±0.01% of the measured value, meeting ultra-high-precision requirements for sensitive temperature control.- Temperature drift: ±0.001°C/°C (module self-temperature effect), minimizing accuracy loss caused by ambient temperature changes in control cabinets.