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3. Key Technical Specifications
| Parameter | Value |
| Manufacturer | GE (General Electric) |
| Part Number | DS200UPSAG1A |
| Series | Speedtronic Mark V |
| Input Voltage | 125 VDC (Nominal) |
| Output Voltages | Multiple regulated DC rails for control logic |
| Fuse Protection | On-board glass tube fuses |
| Connector Type | Multi-pin ribbon and plug-in headers |
| Cooling | Natural Convection |
| Dimensions | Standard Mark V small-form factor card |
4. Product Introduction & Supply Chain Strategy
The GE DS200UPSAG1A is a specialized Uninterruptible Power Supply (UPS) board designed for the Mark V Speedtronic turbine control system. Its primary role is to bridge the gap between the main station power and the sensitive control electronics, ensuring that the turbine control processor remains powered even during transient voltage dips or main power failures.
Strategically, the DS200UPSAG1A is a “High-Criticality” spare. Because power supplies are subject to constant thermal stress and electrolytic capacitor aging, they are often the first point of failure in aging DCS systems. Acquiring a New Surplus unit is a vital move for plant reliability; unlike refurbished units where the capacitors have already endured thousands of hours of heat, our New Surplus stock offers the full MTBF (Mean Time Between Failure) required for another 10+ years of service.
5. Installation & Configuration Guide
- Stage 1: Pre-Installation (Prep & Safety): Isolate the 125 VDC power source. Use a multimeter to confirm the backplane is de-energized. Mark all ribbon cables and wiring plugs with their corresponding header numbers (e.g., J1, J2).
- Stage 2: Removal: Gently disconnect the ribbon cables by pulling on the connector housing, not the wire. Unscrew the four corner mounting screws. Remove the board using ESD-safe gloves to prevent static discharge to the logic circuits.
- Stage 3: Installation (Clone & Seat): Check the fuse ratings on the new DS200UPSAG1A to ensure they match the original board. Align the board with the standoffs and tighten the screws. Re-attach the cables in the exact sequence documented in Stage 1.
- Stage 4: Power-On & Testing: Restore power and immediately check the on-board status LEDs. Use a voltmeter to verify the output test points match the system requirements (typically +/- 5 VDC, 15 VDC, and 24 VDC rails). Ensure no “Control Power Loss” alarms are present on the HMI.
- DS200UPSAG1A
- DS200UPSAG1A
6. Firmware/Software Versions & Upgrade Notes
As a power supply module, the DS200UPSAG1A is hardware-centric and does not contain programmable firmware. However, the “A1A” suffix denotes a specific revision level. Always ensure your replacement board is at the same or higher revision level than the one being replaced. Note that some older Mark V racks may require specific jumper configurations on the backplane to accommodate newer UPS board revisions; consult your original cabinet wiring diagram before commissioning.
7. Frequently Asked Questions (FAQ)
How do I know this board isn’t a “pull” from an old cabinet?
Each DS200UPSAG1A we ship undergoes a visual inspection for “witness marks” on the mounting holes and connector pins. A New Surplus board will have zero scoring on the pins and no dust accumulation in the fuse holders. We guarantee these are unused units.
Can I replace just the capacitors on my old board instead of buying this?
While possible, it is technically risky. Standard capacitors may not meet the high-temperature and ESR (Equivalent Series Resistance) specifications required by GE. A professional New Surplus board ensures the entire circuit—including transformers and voltage regulators—is at zero-hour wear.
What happens if I install this and the fuses blow immediately?
This usually indicates a short circuit elsewhere on the power bus or a cable that was incorrectly seated. Always verify your field wiring for grounds or shorts before applying power to a new UPS board.
Does this board support 115 VAC input?
No, the DS200UPSAG1A is designed specifically for the DC power distribution typically found in Mark V panels (125 VDC nominal). Using AC power will result in immediate and catastrophic failure of the board.
Is this item still supported by GE?
The Mark V series is in the “Mature/Obsolete” phase of its lifecycle. GE no longer prioritizes production of these boards, which is why maintaining a New Surplus inventory on-site is the only way to ensure JIT (Just-In-Time) recovery during a failure.
