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The GE IS200STTCS2A is a Thermocouple Terminal Board for the GE Mark VIeS (MKVIeS) turbine control system. Its primary function is to provide a physical connection and cold-junction compensation for up to 12 thermocouple temperature sensors in a Safety Integrity Level (SIL) environment.
Function and Purpose ⚙️
The IS200STTCS2A acts as the crucial interface between the turbine’s thermocouples and the main safety processor. Thermocouples are sensors that measure temperature by generating a voltage. The board provides a secure termination point for the wiring from these sensors. The “SIL” designation indicates that this board is built to meet stringent safety standards, making it suitable for safety-critical functions where a failure could lead to dangerous conditions.
The board also incorporates cold-junction compensation (CJC) circuitry. CJC is a vital feature that measures the temperature of the terminal board itself to correct for any voltage fluctuations caused by ambient temperature changes. This ensures the thermocouple’s measured voltage accurately reflects the temperature at the hot junction, providing a highly precise and reliable temperature reading for the safety system. The “12 Thermocouple” designation refers to the number of input channels this board supports.
Related Components 🤝
The IS200STTCS2A works in conjunction with other components of the Mark VIeS system:
- Safety Processor Pack (SPRO): The main CPU of the system, which reads the digitized temperature data from the I/O packs and executes safety logic.
- Thermocouple I/O Packs: These electronic modules, such as the IS200TCI, 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.
- Thermocouple Sensors: These are the actual temperature sensors located in the field, such as on the turbine’s exhaust, bearings, or other critical components.
