Emerson 1C31232G02 Ovation compact DCS digital input module, supports 24VAC/VDC and 48VDC differential discrete signals, widely used spare for power plant status signal acquisition.

Product Overview

• Part No: 1C31232G02
• Brand: EMERSON / Westinghouse Ovation

• Category: 16-Channel Differential Digital Input Module 1C31232G02 is a compact digital input module for Emerson Ovation distributed control system. It collects discrete on/off status signals from field switches, limit contacts and equipment feedback sensors. The module accepts 24VAC/VDC or 48VDC differential input signals and converts field status into digital data for Ovation controllers. Differential signal design effectively eliminates common-mode noise and ground loop interference, improving signal stability in electrically noisy plant environments. This updated hardware revision delivers enhanced EMC performance compared with earlier versions. Hot-swap function enables online replacement without system shutdown. Front panel LED indicators display module health and individual channel status for fast field troubleshooting. It acts as essential maintenance spare for boiler, turbine and auxiliary equipment sequential monitoring loops.

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Core Features

• 16 independent differential digital input channels
• Supports 24VAC/24VDC and 48VDC field signal levels
• Differential wiring architecture suppresses electromagnetic interference
• Configurable input debounce time to eliminate contact bounce
• Opto-electrical isolation between field circuits and internal backplane
• Hot-swap supported for online maintenance without system interruption
• Comprehensive module self-diagnosis and fault detection
• Front panel LED indicators for module status and each channel signal state
• Compact plug-in form factor for Ovation standard I/O rack

• Optimized hardware revision with improved noise immunity for power station environments

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Technical Specifications

• Input Channels: 16 differential channels
• Supported Signal Levels: 24VAC/24VDC, 48VDC
• Input Impedance: >1 kΩ @ 24 VDC; >2 kΩ @ 48 VDC
• Isolation: Galvanic isolation between field and control logic
• Debounce Time: Software configurable
• Power Supply: Powered via Ovation rack backplane
• Operating Temperature: -20°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 racks and matching controllers
• Directly interchangeable with compatible predecessor revisions
• Widely deployed in thermal power plants, combined-cycle power stations and petrochemical facilities
• Applied for acquiring breaker status, valve limit feedback, equipment running signals and safety interlock contacts