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The GE IS200TBQAH2A is a Fixed Thermocouple Terminal Board for the GE Mark V (MKV) and Mark VI (MKVI) turbine control systems. Its main function is to provide a physical connection and cold-junction compensation for thermocouple temperature sensors.
Function and Purpose ⚙️
The IS200TBQAH2A serves as the crucial interface between the turbine’s thermocouples and the main control processor. Thermocouples are sensors that measure temperature by generating a voltage. The board provides a secure, organized, and fixed connection point for the wiring from these sensors. The “Fixed” designation means the board is permanently mounted within the cabinet, which provides a highly stable and secure connection, ideal for applications in high-vibration or harsh environments. It incorporates cold-junction compensation (CJC) circuitry, which measures the temperature of the terminal block itself to correct for any voltage fluctuations caused by ambient temperature changes. This ensures that the thermocouple’s measured voltage accurately reflects the temperature at the hot junction, providing a highly precise temperature reading for the control system. The <C/R/S/D> in the name indicates compatibility with different versions or styles of the Mark V system.
Related Components 🤝
The IS200TBQAH2A works in conjunction with other components of the Mark V and VI systems:
- Thermocouple I/O Packs: These electronic modules, such as the TCI, mount directly on the terminal board and contain the active electronics for converting the analog voltage into a digital signal that the main processor can use.
- Processor Cards: The main CPU of the system, which reads the digitized temperature data from the I/O packs.
- Thermocouple Sensors: These are the actual temperature sensors located in the field, such as on the turbine’s exhaust, bearings, or other critical components.
