GE DS200UCIAG2ACC UC2000 Motherboard

الوصف

The GE DS200UCIAG2ACC UC2000 Motherboard (also known as the UCIA board) is a core component within General Electric’s Mark V Speedtronic Turbine Control System.¹

Its primary role is to serve as the foundational backplane for the main processor and communication boards in one of the turbine control system’s redundant control cores (the R Core or Control Engine Core). The multiple trailing letters (ACC) indicate that this board is a heavily revised version of the original DS200UCIAG2 design.²

🛠️ Key Function and Components

The DS200UCIAG2ACC forms the central assembly where the critical control logic and communication functions are integrated.

1. Board Host and Interconnect

The motherboard provides the physical and electrical connections for several essential daughter cards that perform the turbine control functions:³

• UCPB (UC2000 Processor Board): The main Central Processing Unit (CPU) board that mounts directly onto the UCIA, executing the turbine control software.⁴
• PANA (ARCNET No-LAN Driver Board): This board handles the ARCNET communication network, which allows the redundant Mark V cores (T, R, and S) to exchange vital control and diagnostic data.⁵
• μGENI (Micro Genius I/O): Connectors are available to attach Genius I/O boards, which interface with field devices and sensors.

2. Signal Pre-Processing

The UCIA board itself contains an onboard microprocessor (typically a 196 processor) to handle specific signal translation:⁶

• Its processor translates raw pressure transducer signals received from the TCSA board (Fuel Skid Interface Board).⁷
• This translated, pre-processed data is then written to the main UCPB for use in the control sequence software.⁸

3. Hardware Features

• Diagnostic LEDs: The board features a block of 10 LEDs that flash sequentially to show the board is healthy and processing normally, or flash in a specific pattern to indicate an error code for troubleshooting.⁹
• Connectors: It includes multiple connectors (including 50-pin and 9-pin connectors) for power, data bus communication (with the UCPB/PANA), and external device interfaces.
• Jumpers: It is populated with at least one jumper (e.g., CLK ENA) used to configure the board, often related to clock enabling.¹⁰

🔍 Revision Significance (ACC)

The revision code at the end of the part number, DS200UCIAG2ACC, indicates that this is a later version with multiple significant revisions over the original DS200UCIAG2:¹¹

The DS200UCIAG2ACC is generally considered an updated and interchangeable version of the DS200UCIAG2, featuring the latest refinements.