Emerson 1C31194G03 Ovation DCS valve positioner module, receives controller setpoint signals, drives modulating valves and acquires LVDT position feedback, used for precise control of turbine and boiler regulating valves, core spare part for power plant Ovation control system.

Product Overview

• Part No: 1C31194G03
• Brand: EMERSON / WESTINGHOUSE Ovation

• Category: Valve Positioner Electronic Module 1C31194G03 is a dedicated valve position control module for Emerson Ovation distributed control system, the upgraded hardware revision of 1C31194G01. It receives digital command signals transmitted from Ovation controller, outputs proportional drive signals to field modulating valve actuators, and supports LVDT position feedback signal acquisition to realize closed-loop high-precision valve stroke positioning. The module realizes stable regulation of flow, pressure and temperature loops by continuously correcting valve opening deviation. Built-in signal isolation effectively suppresses electromagnetic interference in power plant environments. It supports hot-swap operation for online maintenance without system shutdown. Front panel LED indicators display power status, communication state and channel faults for rapid field troubleshooting. Widely used as maintenance spare for boiler feedwater valves, steam regulating valves and fuel-air control valves in thermal power units.

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Core Features

• Special single-channel closed-loop controller for continuous modulating valves
• Receives digital setpoint via Ovation I/O backplane, outputs analog drive signals to valve actuators
• Compatible with LVDT displacement sensors for valve stem position feedback
• High positioning resolution to guarantee stable process adjustment under variable load
• Galvanic isolation between internal backplane and field signal circuits
• Hot-swap capable, supports online module replacement
• Comprehensive self-diagnosis covering communication failure, feedback signal loss and circuit faults
• Front panel LED status indicators for operation, communication and alarm information
• Standard plug-in design matching Ovation I/O base assembly
• Optimized hardware version with enhanced anti-interference and long-term operational stability

• Industrial hardware meeting strict EMC requirements for power station control rooms

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Technical Specifications

• Control Channel: 1 channel modulating valve control
• Feedback Interface: LVDT position sensor input
• Drive Output: Proportional analog control signal
• Positioning Accuracy: ±0.25% full scale
• Power Supply: Powered through Ovation rack backplane
• Operating Temperature: 0°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Mounting: Ovation standard I/O rack slot installation

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Fully compatible with Emerson Ovation DCS controllers, I/O racks and supporting base assemblies
• Interchangeable with earlier revision 1C31194G01 for field replacement
• Widely deployed in thermal power plants, combined-cycle power stations
• Applied for precise modulation of boiler feedwater valves, main steam control valves, fuel and air regulating valves