Product Overview

• Part No: N897066510E, N897066010M, AOVD, N897066000A
• Brand: ALSTOM

• Category: AOVD Analogue Output Driver ModuleN897066510E, N897066010M and N897066000A belong to ALSTOM AOVD analogue output driver family for legacy turbine control platforms. Different suffix letters represent successive hardware revisions, functionally compatible within matching rack configurations. The module receives digital setpoint data from main controllers via backplane bus and converts signals into standard analogue output signals for valve actuators, positioners and field transducers. It integrates signal conditioning, short-circuit protection and on-board diagnostic circuits to guarantee stable analogue drive output under heavy electromagnetic interference inside turbine governing cubicles. This series is obsolete original maintenance spare widely used for overhaul of thermal and combined-cycle power plant steam turbine control systems.

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Core Features

• High-precision digital-to-analogue conversion for continuous control signal output
• Standard analogue drive channels compatible with electro-hydraulic valve actuators
• Built-in overcurrent, short-circuit and transient surge protection
• Front panel LED indicators for module status and channel fault diagnosis
• Standard Eurocard draw-out structure supporting rapid on-site replacement
• Reinforced multilayer PCB with gold-plated edge connectors for vibration resistance

• Verified compliance with EMC, vibration and wide-range thermal cycling reliability tests

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Technical Specifications

• Operating Supply: 24 VDC
• Typical Output Signal: 4–20mA analogue control signal
• 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 legacy steam turbine governing control racks supporting TRENO bus architecture
• Widely deployed in thermal power plants, combined-cycle power stations and captive power facilities
• Applied for turbine governor valve, intercept valve, bypass actuator analogue position drive and process variable analogue output