Product Overview

• Part No: N895600512D, N895600051C, ECPU_1, N895600200Q
• Brand: ALSTOM

• Category: ECPU_1 Main Central Processor ModuleN895600512D, N895600051C and N895600200Q belong to ALSTOM ECPU_1 main processor family for legacy turbine control systems. Different suffix letters represent successive hardware revisions, functionally compatible within matching TRENO bus rack configuration.As the core master controller of the control rack, this module executes turbine speed regulation, load control, valve position closed-loop algorithm, protection interlock logic and real-time process data calculation. It communicates with I/O boards, communication modules and upper monitoring HMI via TRENO internal backplane bus, processes setpoint commands and field feedback signals, and generates fault alarm information. Equipped with built-in self-diagnosis, transient surge suppression and ESD protection circuits, it guarantees continuous stable operation under severe electromagnetic interference inside power plant governing cubicles. This series is discontinued original critical maintenance spare widely used for overhaul of thermal power and combined-cycle power plant steam turbine control systems.

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Core Features

• High-performance embedded processor running turbine governing closed-loop control algorithms
• Real-time execution of speed control, load regulation, valve logic and protection interlock functions
• Dedicated interface for ALSTOM TRENO rack bus to exchange data with all rack modules
• Front panel LED indicators for module operating status, communication and fault diagnosis
• Standard Eurocard draw-out structure supporting rapid on-site replacement
• Reinforced multilayer PCB with gold-plated edge connectors for vibration resistance
• Integrated signal filtering and overvoltage 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
• 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 racks adopting TRENO bus architecture
• Widely deployed in thermal power plants, combined-cycle power stations and captive power facilities
• Applied as main central controller for steam turbine speed governing, extraction pressure control and auxiliary protection systems