1C31181G01
Product Introduction
The 1C31181G01 is an Ovation remote I/O hybrid module originally manufactured by Westinghouse (Emerson Ovation DCS). It integrates 16-channel analog input plus dual serial communication ports for collecting standard transmitter signals and communicating with third-party smart instruments or Modbus devices. Widely deployed in thermal power and petrochemical process control as spare part.
Description
Part Code Definition
1C31xxx: Ovation standard remote I/O series;181: Hybrid AI & serial communication hardware type;G01: Hardware revision version.
Technical Specifications
Power supply: Backplane +24VDC;16-channel analog input: 4~20mA / 1~5VDC / 0~10VDC configurable, accuracy ±0.1%FS;Dual configurable serial ports: RS232 / RS485 optional, baud rate range: 300~115200bps;Operating temperature: -40℃ ~ +75℃;Hot-swap supported;Isolation between field side and backplane: 1500VAC.
Interface & Communication Layout
Rear connector plugs into Ovation rack backplane for system bus data exchange;Front terminal block connects field transmitters;Side DB9 + terminal terminals serve as dual serial communication interfaces.
Core Functions
High-precision acquisition of pressure, flow and level analog signals;Modbus-RTU protocol connection to third-party PLC and intelligent meters;Local pre-processing of sampled data and packaged transmission to main controller;Built-in self-diagnosis for open circuit, short circuit and communication failure with fault reporting to host system.
Application Scenarios
Thermal power plant auxiliary control cabinet, petrochemical Ovation remote I/O cabinet, retrofitting projects for third-party equipment protocol access.
Operation & Maintenance Notes
Use shielded twisted-pair for analog wiring with single-end grounding at cabinet side;Install 120Ω terminating resistor at both ends of RS485 bus;Verify communication parameters and signal range configuration periodically during routine inspection.
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