DS200SDCIG2AFB: Power Supply and Instrumentation for DC2000 Drives

DS200SDCIG2AFB is an SDCI board – DC Power Supply and Instrumentation – from GE's DC2000 drive line, sold within the Mark V DS200 series because DC2000 drives frequently serve as auxiliary or starting equipment alongside turbines run by a Speedtronic Mark V panel. Circuitry on the board includes several power supplies, motor field power circuits, driver circuits for armature SCR gating, and instrumentation covering AC line and DC motor signals: armature current and voltage, field current and voltage, voltage magnitude, and phase sequence.

As a G2-group SDCI, this board is configured for an external field exciter – the opposite arrangement from G1-group boards, which carry an internal exciter circuit rated at 10 amps or less. Getting this wrong matters: fitting a G1 board where your drive is wired for an external exciter will not work correctly, even though the base SDCI part number looks the same. As with all SDCI boards, this one lives on the drive/exciter side of the system, tied into field CTs, shunts, and motor circuits – not in the Mark V's control cores.

Diagnose Before You Buy a Replacement

Every protective fuse on the SDCI – FU1 (115 VAC supply), FU2/FU3 (signal-level power), FU5/FU6 (internal NRX/MOV assembly) – has its own LED that lights when that fuse blows, which gives you a real head start on diagnosis instead of guessing. When an LED lights up:

• Fully remove power from the drive and let the board discharge before opening the cabinet further – dangerous voltage can still be present after shutdown.
• Check the field wiring on that circuit for a short or insulation breakdown before you replace the fuse. A fuse blowing once might be incidental; a fuse that keeps blowing is far more often a sign of a downstream wiring or field-device problem than a defective board.
• Clear that fault first, then replace the fuse or the board – otherwise a brand-new SDCI is likely to fail the exact same way soon after power-up.

When you swap the board, transfer the jumper and switch settings from the card you're removing – JP1 (MD control source jumper), JP2 (AC contactor drop-out time jumper), SW1 (AC line CT burden selection based on nominal DC output current) – rather than assuming factory defaults will do. And confirm your drive's exciter configuration before ordering, since G1 and G2 aren't interchangeable.

What This Part Number Means

DS200 is the board series prefix, SDCI identifies the DC Power Supply and Instrumentation function, G2 is the product group (external field exciter), and FB is this unit's specific revision combination. GE documents this board family under instruction manual GEI-100173. G1 and G2 reflect a genuine functional split, not a simple revision sequence, so always match the group to how your drive is actually wired.

Related Boards and the Wider Platform

Since the SDCI operates on the drive/exciter side rather than inside the Mark V turbine control core, it isn't grouped with cards like TCDA or TCEA in routine troubleshooting. For how the SDCI fits within the broader Mark V DS200 board family, see our GE Mark V DS200 Boards Explained guide and the GE Speedtronic Part Number Decoder. If a platform migration is part of your long-term plan, see our Mark V vs Mark VI: DS200 to IS200 guide.

What to Send With Your Quote Request

• The full part number and suffix, e.g., DS200SDCIG2AFB
• A photo of the existing card's label
• Drive/turbine model and confirmation of internal vs. external exciter
• Quantity needed
• Urgency – planning ahead or an active fault

Request a Quote

This DS200SDCIG2AFB is offered used, cleaned and tested, with a 1-year warranty (see below). We don't publish pricing online since these quotes depend on exact revision match and current stock – submit a Request a Quote and expect a response within 24 hours. We ship worldwide DDP, accept purchase orders, and support both scheduled work and urgent downtime orders.

General Information about the Product
Part Number	DS200SDCIG2A Mark V DS200
Description	DS200SDCIG2A By GE DS200SDCIG2AFB Power Supply Control Board Mark V
Condition	used Cleaned and Tested. With 1 Year Warranty.