What DS200SDCIG2AGB Does

DS200SDCIG2AGB is a G2-group SDCI: GE's DC Power Supply and Instrumentation Board for the DC2000 static drive line, sold under the Mark V DS200 series because these drives commonly run as auxiliary or starting equipment alongside a turbine controlled by a Speedtronic Mark V panel. On the board you'll find multiple power supplies, motor field power circuits, driver circuits for armature SCR gating, and instrumentation circuits for AC line and DC motor signals – armature current and voltage, field current and voltage, voltage magnitude, and phase sequence.

Being G2-group, this board is built for an external field exciter, unlike G1-group SDCI boards, which include an internal exciter circuit rated at 10 amps or less. This isn't a cosmetic distinction – a G1 board will not perform correctly if your drive's exciter is wired externally, and vice versa. As with every SDCI board, this one interfaces directly with drive-side field wiring, CTs, and shunts rather than sitting in the Mark V's control processor cores.

Diagnose Before You Order

The SDCI is designed to make troubleshooting straightforward, provided you use its built-in indicators. Each protective fuse – FU1 (115 VAC supply), FU2/FU3 (signal-level power), FU5/FU6 (internal NRX/MOV assembly) – has a dedicated LED that lights when that specific fuse blows. Before assuming the board itself is defective:

• De-energize the drive completely and let the board discharge fully before handling it – dangerous voltage can remain even after shutdown.
• Inspect the associated field wiring for a short circuit or degraded insulation before replacing the blown fuse. One blown fuse could be a fluke; repeated blows almost always point to a downstream wiring or field-device fault rather than a bad board.
• Correct the external fault before fitting a new board, or the replacement is likely to fail the same way shortly after power-up.

When you do install a new SDCI, carry the jumper and switch settings over exactly from the card you removed – JP1 (MD control source jumper), JP2 (AC contactor drop-out time jumper), and SW1 (AC line CT burden selection based on nominal DC output current) – instead of relying on factory defaults. Confirm your drive's actual exciter wiring before ordering, since G1 and G2 serve different configurations.

Decoding DS200SDCIG2AGB

DS200 is the board series prefix, SDCI is the DC Power Supply and Instrumentation acronym, G2 is the product group (external field exciter), and GB is this unit's specific revision combination. GE's manual for this board family is referenced as GEI-100173. Since G1 and G2 reflect a real difference in exciter wiring rather than a simple revision order, always confirm which group matches your equipment before ordering.

Related Boards and Wider Context

Because the SDCI belongs to the drive/exciter side of the system, it isn't part of the same rack-level troubleshooting group as Mark V control-core boards like TCDA or TCEA. To understand how the SDCI's DS200 numbering relates to the wider Mark V board family, see our GE Mark V DS200 Boards Explained guide, and for the logic behind GE's Speedtronic part numbering, see the GE Speedtronic Part Number Decoder. If your site is looking at a longer-term platform change, our Mark V vs Mark VI: DS200 to IS200 guide covers the general shift to GE's newer architecture.

What to Send for a Quote

• The full part number and suffix, e.g., DS200SDCIG2AGB
• A photo of the label
• Drive/turbine model and confirmation of internal vs. external exciter
• Quantity
• Urgency – planned procurement or active fault

Request a Quote

This DS200SDCIG2AGB is offered used, clean and tested, with a 1-year warranty (details below). We don't publish prices online since these quotes depend on exact revision match and current stock – submit a Request a Quote and expect a reply 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 DS200SDCIG2AGB DC Power Supply & Instrumentation Board
Condition	used Clean and Tested. With 1 Year Warranty.