1. Product Overview

2. Core Parameters

• Function Positioning: Belongs to the “TC” (Turbine Control) series of power supply/communication boards, usually used for back-end control output and power management.
• Interface Configuration: Equipped with 16-pin and 9-pin connectors (slight differences may exist according to different revision versions), used to connect on-site sensors and actuators.
• Power Supply Characteristics: Built-in power conversion and protection circuits, usually including replaceable fuses (FUSE), used to protect the circuit from overcurrent or short circuit.
• Communication Capability: Supports communication protocols unique to the Mark V system (such as IEC 60870-5-104, IEC 61850, etc.), with data acquisition and instruction transmission capabilities.
• Physical Characteristics: Usually adopts industrial-grade PCB design, with a high protection level (IP20 or higher), suitable for harsh industrial environments.

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3. Product Features

• High Reliability: Adopts redundant design and modular structure. Even if some modules fail (such as fuse blowout), it can be quickly restored by replacing components.
• Easy Maintenance: Equipped with multiple test points (TEST POINTS) on the board, facilitating on-site engineers to quickly locate faults.
• Strong Compatibility: Compatible with various front-end modules of the Mark V series (such as ECRU/ICR, ECRD/ICD), and is the “universal language translator” of the system.
• Durability: Specifically designed for nuclear power plants and large-scale power stations, it can operate stably for a long time in environments with high temperature, strong radiation and electromagnetic interference.

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4. Structure and Composition

• PCB Main Board: The core circuit board, including power management chips, microprocessors, communication chips, etc.
• Connectors: Including multiple sets of standardized connectors (such as D-sub 9pin, 16pin) for signal input and output.
• Protection Components: Built-in fuses, thermistors, etc., to protect circuit safety.
• Interface Modules: Different I/O expansion modules may be equipped according to specific applications (such as analog output, digital input).

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5. Application Fields

• Power Stations: Main control systems of nuclear power plants (such as Sanmen Nuclear Power Plant), gas turbine power stations and large-scale thermal power stations.
• Large-Scale Industrial Control: Used in industrial automation scenarios that require high-precision speed control and complex algorithms.
• Commissioning and Spare Parts: Due to the discontinuation of this model, it is now mainly used as a spare part for in-service units or as a commissioning and maintenance component.

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6. Installation and Maintenance Points

• Power-Off Operation: Before replacing the board or performing any maintenance operations, ensure that the power supply of the Mark V system is completely disconnected to prevent electric shock or unit tripping caused by misoperation.
• Fuse Replacement: The board is usually equipped with 3 replaceable fuses. When replacing, only use fuses of the original factory specification to avoid damaging the circuit.
• Use of Test Points: On-site engineers should use the test points on the board for on-site monitoring, but must strictly follow the operating procedures to avoid contact with high-voltage signals.
• Protection Inspection: Regularly check the protective layer (such as conformal coating) on the PCB to ensure there are no cracks or oxidation.