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The GE IS200TRLYS2F is a Safety-Rated, Normally Closed (NC) Relay Output Terminal Board for the GE Mark VIeS (MKVIeS) turbine control system. Its main function is to provide a physical interface for critical discrete output signals, specifically using normally closed relay contacts in a high-reliability, Safety Integrity Level (SIL) environment.
Function and Purpose ⚙️
The IS200TRLYS2F is a crucial component in safety-critical applications where a single failure cannot be tolerated. The board receives commands from the safety processors and sends them to external devices like relays or solenoids. Its internal logic ensures a high level of integrity for the signals. The “NC” designation is key, indicating that all the relay contacts on the board are Normally Closed, a configuration often used in “de-energize-to-trip” or “de-energize-to-run” applications, where a loss of power to the relay will cause the controlled device to perform a safe action. The “SIL” designation means this board is engineered and built to meet stringent safety standards.
Related Components 🤝
The IS200TRLYS2F works in conjunction with other components of the Mark VIeS system, including:
- Safety Processor Pack (SPRO): The main CPU of the system, which executes the safety logic and sends commands to the board.
- I/O Packs: These electronic modules mount directly on the terminal board and contain the active electronics for activating the relays.
- External Relays: The board connects to these external relays, which in turn control the field devices that perform the actual shutdown or protective action.
