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The GE IS200SCLSH1A is a Logic Master (LM) Contact/Auxiliary Terminal Board for the GE Mark VIe (MKVIe) turbine control system. Its main function is to provide a dedicated, high-density interface for Triple Modular Redundancy (TMR) applications, ensuring safe and reliable operation of critical control signals.
Function and Purpose ⚙️
The IS200SCLSH1A serves as a robust connection point for both digital and auxiliary signals. It is designed to work within a TMR architecture, where three separate control modules process the same signal and “vote” on the output. This redundancy ensures that a single module failure won’t lead to a control malfunction or system trip.
The board provides the physical screw terminals where wiring from field devices like switches, relays, and interlocks is connected. It then routes these signals to the corresponding I/O packs for processing. The “Logic Master” designation refers to its role in handling logic-based signals, which are typically digital on/off signals. By providing a dedicated, TMR-compatible board, it simplifies wiring and improves the overall reliability of the system’s safety-critical functions.
Related Components
The IS200SCLSH1A works in conjunction with other components of the Mark VIe system, including:
- TMR Processor Modules: These are the three separate control processors that read the signals from the terminal board.
- I/O Packs: These electronic modules are mounted on the terminal board and contain the active electronics for signal conditioning and processing.
- Field Devices: The board connects to a variety of field devices, such as limit switches, pressure switches, and solenoids.
