SPECIFICATIONS
Part No.: IS200TSVCH1AFD
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Magnetic PR pickup signal Generates: 150 V p-p
Active PR pickup signal Generate:s 5 to 27 V p-p
Size: 33.02 cm high x 17.8 cm wide
Technology: Surface-mount
Temperature Operating: -30 to 65oC
Product Type: Servo Input/Output Terminal Board
Availability: In Stock
Series: Mark VIe
Functional Description
IS200TSVCH1AFD is a Servo Input/Output Terminal Board developed by GE. It is a part of Mark VIe control system. The terminal board interfaces with electro-hydraulic servo valves responsible for actuating steam/fuel valves in a system. The terminal board facilitates communication and control of two electro-hydraulic servo valves, which are essential for regulating the operation of steam/fuel valves within the system. These valves play a critical role in controlling the flow of steam or fuel to maintain optimal system performance.
Features
- Valve Position Measurement with LVDTs: Linear Variable Differential Transformers (LVDTs) are utilized to measure the position of the valves actuated by the electro-hydraulic servo valves. This feedback mechanism ensures precise positioning and control of the valves, enabling accurate regulation of steam or fuel flow as per system requirements.
- Compatibility and Design Specifics: The terminal board is specifically designed to work with the PSVO (Primary Servo Valve Output) I/O pack and the WSVO servo driver. It is not compatible with the VSVO processor. This specialized design ensures seamless integration and optimized performance when used with the designated servo valve components, enhancing system reliability and efficiency.
- Support for Simplex, Dual, and TMR Control: The board supports various control configurations, including simplex, dual, and TMR (Triple Modular Redundant) control setups. This flexibility allows for adaptable system configurations based on specific application requirements and redundancy needs.
- Power Supply and External Trip Connections: Three 28 V DC power supplies are provided through plug J28. These power supplies are essential for powering the components and circuits associated with servo valve control. Additionally, plugs JD1 or JD2 are designated for external trip connections from the protection module. These connections enable the integration of protective measures to ensure safe operation and prevent potential system faults or failures.
Installation
- Wiring of Sensors and Servo Valves: Sensors responsible for measuring valve positions and servo valves are directly wired to two I/O terminal blocks on the board. Each terminal block is securely fastened with two screws, ensuring a stable connection. These blocks feature 24 terminals, capable of accommodating wiring up to 12 AWG in size. To minimize electrical interference and ensure proper grounding, a shield terminal strip is positioned adjacent to each terminal block. This strip serves as a connection point for chassis ground, enhancing system stability and reliability.
- External Trip Wiring Connection: External trip wiring, typically originating from the protection module, is connected to either plug JD1 or JD2 on the terminal board. These plugs serve as designated connection points for external trip wiring, facilitating the integration of protective measures and trip signals into the system. By connecting external trip wiring to JD1 or JD2, operators can ensure that protective trip signals are effectively communicated to the board, enabling timely responses to potential system faults or abnormalities.
- Verification and Testing: Once wiring is completed, thorough verification and testing procedures should be conducted to ensure the integrity and functionality of the installation. Verification may include continuity checks, insulation resistance tests, and functional testing of sensors, servo valves, and external trip connections. Testing ensures that all components are properly connected, configured, and operational, laying the foundation for reliable and efficient system performance.
Configuration
- Configuration of the Servo Input/Output (TSVC) terminal board is crucial for ensuring the smooth operation and coordination of servo valves, whether in simplex or TMR (Triple Modular Redundant) systems. In a simplex system, where only one set of components operates at a time, each servo valve requires individual configuration. For servo 1 and servo 2, jumper settings are adjusted to ensure the correct coil current. Specifically, jumper JP1 is utilized for configuring the coil current of servo 1, while jumper JP4 is employed for servo 2. This meticulous configuration guarantees that each servo valve receives the appropriate current for optimal performance within the simplex configuration.
- On the other hand, in a TMR system designed for enhanced redundancy, each servo output can accommodate three coils, enabling continued operation in case of a single failure. To configure servo outputs in a TMR system, jumpers JP1 through JP3 are used for servo 1, while jumpers JP4 through JP6 are utilized for servo 2. These jumpers allow operators to select the coil currents for each of the three coils, ensuring coordinated operation and redundancy within the TMR setup.
- Beyond coil current selection, additional configuration parameters for the servo board are adjusted using the ToolboxST application. This software tool provides operators with the flexibility to fine-tune settings, calibrate components, and optimize performance based on specific system requirements and operational conditions. By leveraging the capabilities of the ToolboxST application, operators can ensure comprehensive control and monitoring of servo valves, thereby maintaining system integrity and reliability across various operational scenarios.
Diagnostics
The PSVO system includes several diagnostic checks to monitor the health and functionality of the terminal board components. These checks help ensure proper operation and provide fault alerts when issues arise. The following are the key diagnostic functions performed:
- Output Servo Current Diagnostics: The system monitors the output servo current to ensure it is within predefined limits. If the current is either too high or too low, or if the servo output is not responding as expected, the system triggers a fault. This indicates a problem with the servo actuator or its control circuitry.
- Regulator Feedback (LVDT) Diagnostics: The system also monitors the Linear Variable Differential Transformer (LVDT) feedback signal, which is used to measure the position of the servo actuator. If the feedback signal is outside of the expected range, a fault is generated.
- Dual-sensor systems: If the regulator is equipped with two LVDT sensors, the system will automatically remove the faulty sensor from the feedback calculation and rely on the good sensor to maintain normal operation. This redundancy helps prevent downtime due to sensor failure.
- Composite Diagnostic Alarm (L#DIAG_PSVO):
When any of the above signals (servo current or LVDT feedback) becomes unhealthy, the system raises a composite diagnostic alarm identified as L#DIAG_PSVO. This alarm indicates that there is a fault with one or more components of the PSVO system.
- Diagnostic details: Specific details about the individual diagnostic issues can be accessed through the ToolboxST application, which provides more in-depth information about the fault.
- Latched signals and reset: Diagnostic signals can be latched, meaning the system retains the fault condition even after the underlying issue is resolved. To clear the fault, the RESET_DIA signal can be used to reset the diagnostic status once the system has returned to a healthy state.
- Cable Connector ID Device:
Each cable connector on the terminal board has an associated ID device, which is interrogated by the I/O processor. This ID device is a read-only chip that stores critical information such as:
- Serial number
- Board type
- Revision number
- J connector location
- During operation, the I/O processor reads the data from the ID device. If it detects any mismatch, such as incorrect board type or revision, a hardware incompatibility fault is generated. This ensures that only the correct components are used in the system, preventing potential damage or malfunction due to incompatible hardware.
The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200TSVCH1AFD?
It is a Servo Input/Output Terminal Board developed by GE under the Mark VIe series.
How are the coil currents selected for each servo output in a TMR system?
For servo 1, jumpers JP1 through JP3 are used, while for servo 2, jumpers JP4 through JP6 are utilized to select the coil currents for each of the three coils.
What software tool is used for additional configuration of the terminal board?
The ToolboxST application is employed for adjusting additional configuration parameters, fine-tuning settings, calibrating components, and optimizing performance based on specific system requirements.
How does configuring the terminal board contribute to system reliability and performance?
Proper configuration ensures that each servo valve operates optimally, promoting smooth system operation, enhanced redundancy in TMR configurations, and improved overall system reliability and performance.
