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The GE IS200SHRAS2A is a HART Analog I/O Terminal Board for the GE Mark VIe (MKVIe) turbine control system, designed for applications requiring a high level of safety and reliability. Its primary function is to provide a physical connection point for analog sensors and actuators that use the HART (Highway Addressable Remote Transducer) protocol in a Safety Integrity Level (SIL) environment.
Function and Purpose ⚙️
The IS200SHRAS2A serves as the crucial interface between the turbine’s instruments and the main control processor. It handles both analog signals (e.g., a 4-20 mA current loop) and the digital information superimposed on that same wiring via the HART protocol. The “SIL” designation is key, meaning this board is built to stringent safety standards. It’s designed to be highly reliable and fault-tolerant to ensure that critical safety functions operate correctly. This is achieved through robust design and, often, redundancy in the system architecture.
The board’s capabilities allow for:
- Remote Configuration: Technicians can remotely adjust sensor settings from the control room.
- Enhanced Diagnostics: The board can read detailed health and status information from the field devices, helping with predictive maintenance.
- Safety-Rated Operation: It meets the requirements for use in safety-critical applications where a failure could lead to dangerous conditions.
Related Components
The IS200SHRAS2A works in conjunction with other components of the Mark VIe system to form a complete control loop. These components include:
- HART-Enabled I/O Packs: These electronic modules mount directly on the terminal board and contain the active electronics for signal processing and HART communication.
- Processor Cards: The main CPU of the system, which reads the digitized data from the board and executes the control and safety logic.
- HART-Compatible Field Devices: The board connects to a variety of smart instruments (e.g., pressure transmitters, thermocouples) that support the HART protocol.
