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The GE IS200SRLYH2A is a Digital Output (DO) Plug Box Type Terminal Board for the GE Mark VI (MKVI) and Mark VIe (MKVIe) turbine control systems. Its main function is to provide an interface for relay-based digital output signals, allowing the control system to operate external devices like solenoids, contactors, and motor starters.
Function and Purpose ⚙️
The IS200SRLYH2A is a crucial part of the control loop, serving as the link between the system’s electronic logic and the physical world. The board receives low-voltage signals from the main processor and uses them to energize or de-energize relays. These relays, in turn, control higher-voltage field devices. This design provides several benefits:
- Electrical Isolation: The relays act as a barrier, providing electrical isolation between the sensitive control electronics and the potentially noisy, high-power field circuits. This protects the control system from voltage spikes and ground loops.
- Signal Amplification: The relays amplify the low-power digital signals from the controller to a higher power level capable of driving field devices.
- Simplified Wiring: The “plug box” design makes installation and maintenance easier, allowing for the quick disconnection and connection of field wiring.
Related Components
The IS200SRLYH2A works in conjunction with other components of the Mark VI system:
- Processor Cards: The main CPU of the system sends the digital output commands to the IS200SRLYH2A.
- I/O Packs: Electronic modules that mount on the terminal board and contain the active electronics for signal processing and relay control.
- Field Devices: The board connects to various field devices, such as solenoids, motor contactors, and indicator lights, to carry out control commands.
