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The GE IS200ICIAH2AAB is a specific assembly or revision of the Innovation I/O (Input/Output) Board used in General Electric’s Mark VI Speedtronic Turbine Control System.
This board is part of the control system designed to manage and protect large industrial gas, steam, and hydro turbines in power generation facilities.
⚙️ Function and System Role
The primary function of the IS200ICIAH2AAB is to serve as the I/O interface for the main Mark VI control processor:
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Signal Acquisition: It receives and manages signals coming from the physical field devices, such as:
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Sensors: Thermocouples, RTDs, pressure transmitters, limit switches, and other instrumentation.
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These signals come from the Termination Removal Pack (TRP) or terminal boards that handle the external wiring.
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Control Output: It sends control commands from the main processor out to actuators, such as:
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Solenoid valves
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Control relays
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Motor starter circuits
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System Architecture: It is a VME (VersaModule Eurocard) format board that plugs directly into the backplane of the Mark VI rack, ensuring high-speed and reliable data communication with the main control module.
🔎 Revision Details
The part number structure provides specific details:
| Part Segment | Meaning |
| IS200 | GE’s Innovation Series of control modules. |
| ICIA | Innovation I/O Board (the functional acronym). |
| H2A | Hardware Group 2, Artwork Revision A (the base design and engineering level). |
| AB | Assembly/Manufacturing Revision (a minor production change, potentially related to component sourcing, coating, or assembly process, that does not change the core function of the board). |
The IS200ICIAH2AAB is effectively the same core component as the IS200ICIAH2A, with the final letters indicating a specific manufacturing iteration. It is engineered to be robust, often including a conformal coating for protection in harsh industrial environments.1
