Product Overview

• Part No: POS1846, TRVC062333000, CP00000310
• Brand: ALSTOM

• Category: POS1846 LVDT Position Acquisition Module

   
  POS1846 TRVC062333000 CP00000310 is a standard Eurocard plug-in position measuring board for ALSTOM Contronic / MicroREC turbine control platform. The three identifiers belong to one hardware assembly:
   
  POS1846 = module model；TRVC062333000 = drawing part number；CP00000310 = factory component reference code.
   
  This module is specially designed for LVDT linear displacement transducers. It provides excitation power for LVDT sensors, conditions and demodulates alternating differential position signals, and converts raw inductive signals into standardized digital position values. Processed position data is transmitted to the CMP main processor via rack internal bus to realize closed-loop position regulation of steam turbine governing valves, intercept valves and bypass actuators. Built-in signal filtering, surge suppression and galvanic isolation effectively resist severe electromagnetic interference inside turbine control cubicles. It is discontinued original critical maintenance spare widely used for overhaul of thermal power and combined-cycle power plant steam turbine governing systems.

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Core Features

• Dedicated signal conditioning & excitation circuit for LVDT position sensors
• High-precision demodulation of differential AC displacement signals
• Real-time conversion of sensor signals into digital position feedback data
• Front panel LED indicators for module running status and channel fault diagnosis
• Standard Eurocard draw-out structure supporting rapid on-site replacement
• Reinforced multilayer PCB with gold-plated edge connectors for anti-vibration performance
• Integrated ESD, transient overvoltage protection and EMI noise filtering

• Passed EMC, vibration and wide-range thermal cycling reliability qualification

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Technical Specifications

• Operating Supply: 24 VDC backplane power
• Supported Sensor: LVDT linear variable differential transformer
• Operating Temperature: -10°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Standard Eurocard rack plug-in printed circuit board

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Compatible with ALSTOM Contronic / MicroREC legacy steam turbine control rack architecture
• Widely deployed in thermal power plants, combined-cycle power stations and captive power facilities
• Main application: continuous position feedback collection for turbine main valves, control valves and hydraulic actuators, supporting valve closed-loop governing control