The General Electric DS200AAHAH1A, often shortened to AAHA board, is indeed an ARCNET connection board specifically designed for the Mark V LM series of Speedtronic gas turbine control systems by GE.

Function:

• The DS200AAHAH1A acts as an interface board, enabling communication between various modules and the control engine of the Mark V LM system using the ARCNET protocol. ARCNET is a networking technology specifically designed for industrial automation systems.

Applications:

• Connects external devices like I/O cores (handling sensor data and control signals) to the central control engine.
• Facilitates communication between the user interface terminals and the control engine using a protocol like Stage Link.
• Enables data exchange between different components within the system using ARCNET, ensuring proper control and operation of the turbine.

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