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The GE DS200UPLAG1BBA LAN Power Supply Board is a circuit board used in the General Electric Mark V Speedtronic Turbine Control System and related 1$\text{GE}$ drive systems.2
This board’s primary and most critical function is to provide stable, regulated power to the system’s local area network (3$\text{LAN}$) components, ensuring reliable communication within the controller.4
⚙️ Function and Part Number Analysis
The part number $\text{DS200UPLAG1BBA}$ is broken down as follows:
| Segment | Meaning | Detail |
| DS200 | Series Tag | Part of the $\text{GE Mark V}$/Drive Systems product line. |
| UPLA | Functional Acronym | LAN Power Supply Circuit (The core function). |
| G1 | Grouping Tag | Design Group 1 for this board type. |
| B | Functional Revision 1 | The second major functional version of the board. |
| B | Functional Revision 2 | The second minor functional revision or change. |
| A | Artwork Revision | The first artwork/physical layout revision. |
Key Functions ($\text{UPLA}$)
- LAN Power: Supplies clean $\text{DC}$ power to the network chips and circuits that handle communication (such as $\text{ARCNET}$ or $\text{DLAN}$) between the redundant control processors ($\text{R}$, $\text{S}$, and $\text{T}$) in the $\text{Mark V}$ panel.
- System Integrity: Ensures the consistent data exchange necessary for the Triple Modular Redundant ($\text{TMR}$) architecture to correctly execute its 2-out-of-3 voting logic.
- Components: Like other 5$\text{UPLA}$ boards, it is populated with connectors (e.g., 26-pin), fuses, a reset button, a toggle switch, and multiple switches/jumpers used for application-specific configuration.6
🛠️ Installation and Configuration Note
When replacing the $\text{DS200UPLAG1BBA}$ board, it is critical to meticulously record and replicate the settings of all the configuration elements (jumpers and $\text{DIP}$ switches) from the old board onto the replacement unit. These settings define the board’s operational parameters within the turbine’s control scheme, and incorrect settings will lead to system faults or failure.
