One board, several catalog names

Depending on which catalog you read, this part is a Power Control Board, an EX2000 Power Supply Board, or a UC2000 Power Supply Board. Three names, one item: DS200UPSAG1A, here with revision tail DB. The facts consistent across vendor documentation are these: it is a power supply board from GE's Salem, Virginia DS200 series; it is catalogued against the EX2000 excitation platform GE installed beside many Speedtronic-controlled generators; and surviving GE-era text also places the same design, as the UC2000 supply, in the controller racks of GE's Innovation Series drives. Its job in every case is the unglamorous one everything else depends on: convert the incoming line feed into stable control-level power.

The "Power Control Board" label on listings like this one is a filing name, not a functional claim — there is no firmware to version-match here and no I/O configuration to download. Matching the part number and revision is essentially the whole compatibility story, which also means diagnosis is largely electrical and largely doable before you spend money.

First checks when control power drops

• Prove the input. Measure the feed at the cabinet terminals. Upstream breakers and connections fail more often than conversion hardware and cost nothing to fix.
• Open the fuse story. Three fuses protect this board against overcurrent. An intact set moves suspicion onto the board; an open fuse moves it downstream — find what pulled the current before installing anything new, and re-fuse strictly to the factory rating.
• Try the reset, read the LED. The onboard reset button and LED indicator exist for this moment. Record what they do; it sharpens both your repair decision and our stock match.
• Wait out the capacitors. Stored charge persists briefly after shutdown — published handling guidance for this board specifies waiting roughly 30 seconds after power removal before contact.

And confirm you are in the right cabinet family at all: Speedtronic Mark V control cores are powered by the DS200TCPS family, not the UPSA. A dark <R>, <S>, <T>, or <C> core in a heavy-duty Mark V panel sends you to that part number instead — the split is mapped in GE Mark V DS200 Boards Explained.

Letter by letter: DS200UPSAG1ADB

DS: GE's Salem, Virginia board series. 200: base-level board (a 215 prefix would mean a higher-level assembly with added components). UPSA: the functional acronym. G1: the group variation — the only group this family circulates in. A: a functional revision that is not backward compatible, which is why DS200UPSAG1A is the number that must match. DB: this unit's backward-compatible revision tail. Market stock also carries FD and GD tails on the same G1A base; when tails differ from your label, we say so in the quote and confirm interchangeability rather than assume it. Decoder logic, worked examples, and the G-versus-H warning live in our GE Speedtronic Part Number Decoder.

Where the UPSA fits among DS200 boards

Think of the DS200 prefix as a factory rather than a system: Salem built boards for Mark V turbine control, EX2000 excitation, and the drive controllers of the same era under one numbering roof. That is why your Mark V spares supplier — us — stocks the exciter-side supply as well. If the same cabinet inspection has produced a longer shopping list, the Mark V-era boards are gathered in GE Mark V DS200 Boards and the wider family in GE Speedtronic Turbine Control Boards.

Speeding up your quote

1. Full label number (DS200UPSAG1ADB) and a label photo.
2. Host equipment and plant context: exciter or drive model if known, generator package, control system type.
3. Electrical symptoms and fuse findings.
4. Quantity, and breakdown-versus-planned status.
5. Destination country, so DDP terms are quoted accurately from the start.

Terms of supply

Used, cleaned and tested, one-year warranty — see the table below. Send Request a Quote with the list above and we respond within 24 hours. Worldwide DDP delivery; purchase orders accepted.