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The GE DS200UPLAG1APR2 LAN Power Supply Card is a specialized circuit board manufactured by General Electric for use in their Mark V Speedtronic Turbine Control System.1
Its core function is critical to the system’s operation and is defined by the acronym 2$\text{UPLA}$.3
⚙️ Board Function and Design
| Feature | Detail |
| Functional Role ($\text{UPLA}$) | LAN Power Supply Circuit. It provides the regulated $\text{DC}$ power necessary for the communication components ($\text{LAN}$ circuits) within the control module. |
| System Importance | Ensures stable, clean power for the data communication pathways (like $\text{ARCNET}$ or $\text{DLAN}$) that enable the multiple processors ($\text{R}, \text{S}, \text{T}$ in a $\text{TMR}$ system) to exchange information and execute critical 2-out-of-3 voting for fault tolerance. |
| Physical Components | Typically includes various connectors (e.g., 26-pin, $\text{D}$-shell, stab-on), fuses, a reset button, and switches/jumpers for configuration. |
| On-Board Feature | Sources indicate this board may also supply on-board $\text{RAM}$ to work in conjunction with other Mark $\text{V}$ boards. |
🔍 Part Number and Revision Breakdown
The full part number, 4$\text{DS200UPLAG1APR2}$, indicates a highly revised version of the original 5$\text{UPLA}$ board:6
| Segment | Meaning | Detail for DS200UPLAG1APR2 |
| DS200 | Series Tag | $\text{GE Mark V}$/Drive Control Product Line |
| UPLA | Functional Acronym | LAN Power Supply Circuit |
| G1 | Grouping Tag | Design Group 1 |
| A | 1st Functional Revision | Revision A |
| P | 2nd Functional Revision | Revision $\text{P}$ (Indicates a significant functional enhancement/update) |
| R2 | Artwork Revision | Revision $\text{R2}$ (A special artwork revision focusing on the internal configuration or layout) |
Replacement Precaution
Due to its role as a configurable circuit card in a precise control system, any replacement DS200UPLAG1APR2 card must be configured to match the specific settings (jumpers, $\text{DIP}$ switches) of the old card to maintain the correct “personality” for the turbine control application.
