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The GE DS200UCIAG3AAA UC2000 Motherboard (also known as the UCIA board) is a highly-revised and crucial interface component in General Electric’s Mark V Speedtronic Turbine Control System.
Like its predecessors, its fundamental role is to act as the foundation and interconnect for the main processor and communication modules within one of the system’s redundant control cores, typically the R Core.
🧐 Component Analysis and Revisions
The extensive string of letters and numbers in the part number provides key information about the board’s design and evolution:
| Part Number Segment | Meaning |
| DS200 | Identifies the board series within the GE Mark V Speedtronic system. |
| UCIA | The functional acronym: UC2000 Motherboard. |
| G3 | Indicates the product Group 3 within the Mark V series, usually associated with specific hardware generations or applications. |
| AAA | Signifies three significant, consecutive functional revisions from the base G3 design, indicating that this is a very late and mature version of the UCIA motherboard. |
Functional Role
The board’s core function is to support the main control assembly:
- Daughterboard Host: It provides the mechanical and electrical interface for mounting the essential control boards:
- UCPB (UC2000 Processor Board): The main CPU that executes the turbine control algorithms.
- PANA (ARCNET No-LAN Driver Board): Handles the ARCNET communication for the triple-redundant Mark V control system.
- $\mu$GENI Boards: Provides connections for Genius I/O boards, which interface with field devices.
- Signal Translation: The UCIA contains an onboard microprocessor (often a 196 processor) that is dedicated to performing pre-processing tasks, such as translating raw fuel skid pressure signals (from the TCSA board) before sending them to the UCPB’s main processor.
Distinguishing Features (Group 3)
While the function remains consistent across all UCIA/UCIB boards, the shift to a G3 grouping (DS200UCIAG3AAA vs. DS200UCIAG2ACC) often indicates an update to the compatible processor board or supporting component architecture. In some very late Mark V configurations, a similar-generation board (UCIB) was paired with a more advanced LBC586P CPU daughterboard, sometimes including an integrated solid-state drive (SSD) for mass storage, indicating a major control evolution.
The DS200UCIAG3AAA is thus a highly evolved motherboard designed for the most reliable and latest operational configurations of the Mark V control platform.
