About the DS200UDSAG1ADC (Listed Under Its Legacy Catalog Title)

This unit appears in our catalog under a legacy title of relay board, but the part number is the authority here: DS200UDSAG1ADC is a Group 1 UDSA from GE's Mark V-era DS200 family, and the UDSA is cataloged across the surplus market as an excitation board — hardware associated with the EX2000-generation excitation equipment of the Speedtronic Mark V period. The distinction matters if you found this page searching for relay output hardware: GE's relay terminal board of this era is the RTBA, a different card entirely, and we stock that family too. The UDSA in front of you is a processor board — an 80196 microprocessor with firmware in socketed EPROM modules — whose face carries 21 four-character displays and 32 LEDs for status and diagnostics, with system signals passing through a 40-pin ribbon connector and behavior set by three-pin JP configuration jumpers. GE's original UDSA manual is scarce, so we state only what the hardware and consistent vendor records confirm, and we verify every order against your label.

Confirm the Fault Path Before You Buy

Given the naming confusion around this board, the first diagnostic step is making sure a UDSA is what you actually need:

• Match the part number, not the description. Pull the label from your installed board. If it reads DS200RTBA-something, you need a relay terminal board, not this card. If it reads DS200UDSAG1A with a revision suffix, you are in the right place.
• Test the ribbon before the board. The 40-pin ribbon cable's plastic connector is fragile and unsupported; a damaged or half-seated ribbon produces convincing board-failure symptoms. Reseat both ends by the connector body — never pull on the cable itself.
• Reseat the firmware. Socketed EPROMs migrate out of their sockets over years of thermal cycling. A careful, grounded reseat is free and frequently decisive.
• Audit the jumpers. Each three-pin jumper bridges two pins to select a behavior; a previous swap may have left the map wrong. Compare with drawings or the outgoing board.
• Trace panel alarms properly. The UDSA serves excitation-side equipment — it is not resident in the Mark V cores <R>, <S>, <T> or <C>, so core-rooted alarms point elsewhere.

Part Number Structure and the ADC Revision

DS200UDSAG1ADC decodes under the standard DS200 convention: DS200, the Mark V-era series; UDSA, the functional acronym; G1, Group 1 — the configuration group that must match your installed board; and ADC, the revision block — functional revisions A and D with artwork revision C. On a lightly documented family like this one, revision matching is your insurance policy: quote the full string, attach a label photo, and let us confirm compatibility before anything ships. The complete field-by-field logic is in our GE Speedtronic Part Number Decoder.

Related DS200 Excitation and Terminal Hardware

If your search really was for relay outputs, the RTBA relay terminal board family is the destination, and both families sit in our GE Mark V DS200 Boards collection alongside the rest of the generation profiled in GE Mark V DS200 Boards Explained. The wider Speedtronic range — Mark V through the IS200-numbered Mark VI hardware discussed in Mark V vs Mark VI: DS200 to IS200 — lives in the GE Speedtronic Turbine Control Boards collection. One planning note that applies to any UDSA purchase: surplus boards are documented shipping with empty EPROM sockets, so budget time to transfer your firmware chips from the failed board during the swap.

What Makes an RFQ Instantly Quotable

• Full part number with revision suffix — DS200UDSAG1ADC — straight from the label.
• Photos of the label and, if reachable, the jumper field.
• What the board serves: exciter or drive model, generator, turbine model, Mark V Simplex or TMR.
• Whether your failed board's EPROMs are recoverable.
• Quantity, ship-to country, and urgency — running failure or planned spare.

Request a Quote — 24-Hour Turnaround, DDP Worldwide

This DS200UDSAG1ADC is used stock, cleaned and tested, with the one-year warranty shown below. Send us a Request a Quote and we respond within 24 hours. Delivery is worldwide DDP, and purchase orders are welcome.