DS200UDSAG1APR2: The PR2-Marked Variant of the UDSA Excitation Board

New surplus stock of the DS200UDSAG1A carrying the PR2 marking — a Group 1 UDSA from the DS200 board family of GE's Speedtronic Mark V era, cleaned and tested. The UDSA is cataloged across the surplus market as an excitation board, tied to the EX2000-generation excitation equipment that partnered Mark V turbine controls, and its hardware makeup is well established even though GE's original manual for the family is hard to come by: an 80196 microprocessor does the processing, firmware rides in socketed EPROM modules, a 40-pin ribbon connector carries signals to and from the system, three-pin JP jumpers set configuration, and the board reports its condition through 21 four-character displays and 32 LEDs. That last feature makes the UDSA one of the more communicative boards of its generation — useful both in service and on the bench.

Bench Checks That Beat a Blind Swap

Before committing to a replacement, put the evidence together:

• Interrogate the indicators. If your installed board still powers up, photograph or write down what the four-character displays and LEDs show at the moment of failure. Those readings tell you — and us — whether the board is dead, confused, or faithfully reporting a problem that lives elsewhere.
• Handle the ribbon like the weak point it is. The 40-pin ribbon's plastic end connector lacks support and fails when the cable is tugged. Reseat by gripping the connector body only. Ribbon damage is the classic UDSA false positive.
• Reseat the EPROMs, grounded. Chips creep out of sockets over decades of heat cycles; a wrist-strap reseat costs minutes and resolves a surprising share of dead-board calls.
• Map the jumpers. Every three-pin jumper bridges two pins to choose a behavior. Record your board's map before removal — the replacement must match it, not the factory defaults.
• Verify the fault belongs here. Excitation-side symptoms point at the UDSA; alarms rooted in the Mark V panel cores <R>, <S>, <T> or <C> do not.

About That PR2 Suffix

Most DS200 part numbers end in a two- or three-letter revision block — think AAA, ADD, ADE — decoding to functional and artwork revisions, as covered in our GE Speedtronic Part Number Decoder. The PR2 marking on this unit sits outside that common pattern, and we will not guess at GE's intent: treat it as a variant identifier to be matched, exactly like any other suffix. Practically, that means comparing it against the marking on your installed board and its position on the label. If your board shows a different suffix, send us the label photo anyway — verifying whether a PR2-marked unit fits your slot is precisely the kind of check our team runs before quoting, and it costs you nothing but the photo.

Hardware Context: EX2000-Era Systems and the Mark V

The UDSA belongs to the constellation of DS200 boards GE deployed across turbine control, excitation, and drive systems in the Mark V era — a family tour is in GE Mark V DS200 Boards Explained, and the boards themselves populate our GE Mark V DS200 Boards and GE Speedtronic Turbine Control Boards collections. Plants weighing the longer horizon can compare this generation against its IS200-numbered successor in Mark V vs Mark VI: DS200 to IS200. One logistical note specific to the UDSA: surplus boards are documented arriving with EPROM sockets unpopulated. Your site firmware lives on the chips in your current board, so the swap plan should include their careful transfer — or a conversation with us at quote time about what your configuration requires.

Assembling Your Quote Request

• Full part number and suffix as printed on your label — and note whether it shows PR2 or a standard letter block.
• Label photo, jumper-field photo, and any display codes captured at failure.
• Equipment served: exciter or drive model, generator, turbine model; Mark V Simplex or TMR.
• EPROM status on the outgoing board.
• Quantity, destination country, and how quickly you need it — unit down or planned work.

New Surplus Stock — Request a Quote Today

This DS200UDSAG1APR2 is new surplus, cleaned and tested, with the one-year warranty listed below. Submit a Request a Quote and our team replies within 24 hours. We ship worldwide on DDP terms and accept purchase orders.