Product Overview

• Part No: DSI1817, TRVC062335000, CP00003934
• Brand: ALSTOM

• Category: DSI1817 Digital Input ModuleDSI1817 TRVC062335000 CP00003934 is a standard Eurocard plug-in digital input board for ALSTOM Contronic turbine control platform. The three identifiers correspond to one hardware assembly:DSI1817 = module model；TRVC062335000 = drawing part number；CP00003934 = factory component reference code.This module is dedicated to collecting field binary digital signals including valve position feedback, equipment running status, limit switch contacts, protection and interlock signals. It carries out signal conditioning, contact debounce filtering and optoelectronic galvanic isolation, then transmits processed digital status data to the CMP main processor via rack internal bus. Isolation design effectively blocks field surge interference and prevents ground loop disturbance to the control rack. Equipped with channel status LED indicators for fast on-site troubleshooting. It is a discontinued original maintenance spare widely used for overhaul of thermal power and combined-cycle power plant steam turbine governing systems.

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Core Features

• Multi-channel isolated digital input for turbine field status signal acquisition
• Built-in signal debounce filter to eliminate contact jitter and electrical noise
• Opto-coupler galvanic isolation between field circuits and rack control circuit
• Front panel LED indicators for individual channel operating status
• Standard Eurocard draw-out construction supporting rapid on-site replacement
• Reinforced multilayer PCB with gold-plated edge connectors for anti-vibration performance
• Integrated ESD and transient surge protection adapting harsh power station environments

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

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Technical Specifications

• Operating Supply: 24 VDC backplane power
• 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
• Used for collection of valve feedback signals, auxiliary equipment status, protection trip and interlock switch signals