What the DS200SDCIG1AEB Does

DS200SDCIG1AEB is an SDCI – a DC Power Supply and Instrumentation board built by GE for its DC2000 static drive family, cataloged within the Mark V DS200 board series because DC2000 drives of this type are commonly used as auxiliary and starting equipment on GE gas turbine trains alongside a Speedtronic Mark V control panel. On the board itself you'll find several power supplies, motor field power circuits, driver circuits for armature SCR gating, and instrumentation circuits that monitor AC line and DC motor signals – armature current and voltage, field current and voltage, voltage magnitude, and phase sequence.

This is a G1-group SDCI, which matters functionally, not just cosmetically: G1 boards include circuitry for an internal field exciter rated at 10 amps or less. Unlike the TCDA/TCRA/TCEA cards that live directly in the Mark V's <R>/<S>/<T>/<C> control cores, the SDCI sits on the drive side of the system, interfacing directly with the DC2000 drive's field wiring, current transformers, and shunts.

How to Diagnose Before You Buy

The SDCI is instrumented specifically so you don't have to guess: every protective fuse on the board (FU1 for the 115 VAC supply, FU2/FU3 for signal-level power, FU5/FU6 for the internal NRX/MOV assembly) has its own LED indicator that lights when that specific fuse has blown. That's useful, but it also means a lit LED is a starting point for investigation, not proof the board itself has failed. Before you replace a fuse or the card:

• Remove all power from the drive and let the board fully discharge before touching it or opening the cabinet further – high voltage can be present even after shutdown.
• Inspect the field wiring associated with that fuse's circuit for a short or degraded insulation before you simply replace the fuse. A fuse that blows once can be a fluke; a fuse that keeps blowing is almost always telling you about a wiring or field-device fault downstream, not a bad board.
• Only replace the board itself once wiring has been cleared – swapping the SDCI without fixing an external short will very likely take out the new board's fuse (or the board) the same way.

It's also worth double-checking the jumper and switch settings before you finish a swap: JP1 (the MD control source jumper), JP2 (the AC contactor drop-out time jumper), and SW1 (which selects the AC line CT burden based on nominal DC output current) all need to be set to match the card you're removing, not left at factory default. Because the SDCI's G-group is tied to how your drive's field exciter is wired – internal on G1, external on G2 – ordering the wrong group can produce a board that fits the slot but doesn't run correctly, even though nothing looks obviously wrong.

Reading the DS200SDCIG1AEB Part Number

DS200 is the board series prefix, SDCI is the functional acronym for this DC Power Supply and Instrumentation design, G1 is the product grouping – confirmed to mean this board carries an internal field exciter circuit rated up to 10 amps, as opposed to G2 boards, which are configured for an external field exciter instead – and EB is this unit's specific revision combination. Because G1 and G2 correspond to a real functional difference in how your drive's exciter is wired, don't treat them as simple revision upgrades of one another; match the group your drive actually uses. GE's instruction manual for this board family is referenced as GEI-100173.

Related Boards and Broader Context

The SDCI doesn't share a rack with the Mark V's TCDA/TCEA/TCQA control cards the way those boards share one with each other, since it belongs to the drive side of the system rather than the turbine control core. If you're trying to understand how the SDCI's DS200 numbering relates to the rest of the Mark V board family, see our GE Mark V DS200 Boards Explained guide and the GE Speedtronic Part Number Decoder for how GE's part numbers are constructed. If your site is migrating off Mark V-era hardware entirely, our Mark V vs Mark VI: DS200 to IS200 guide covers the general shift to GE's later platform.

What to Send With Your Quote Request

• The full part number and suffix from the label, e.g., DS200SDCIG1AEB
• A photo of the label if you can get one
• The drive/turbine model this feeds and whether your exciter is internal or external
• Quantity needed
• Urgency – planning ahead or an active outage

Request a Quote

This DS200SDCIG1AEB is offered used, clean and tested, with a 1-year warranty (see below). We don't publish prices online since Mark V and DC2000 board quotes depend on exact revision match and current stock – submit a Request a Quote and our team will respond within 24 hours. We ship worldwide DDP, accept purchase orders, and support both scheduled maintenance and urgent downtime situations.

General Information about the Product
Part Number	DS200SDCIG1A Mark V DS200
Description	DS200SDCIG1A By GE DS200SDCIG1AEB DC Power Supply and Instrumentation Board
Condition	used Clean and Tested. With 1 Year Warranty.