DS200SDCIG2AHB in the DC2000 Drive Circuit

DS200SDCIG2AHB is a G2-group SDCI – GE's DC Power Supply and Instrumentation Board for the DC2000 drive line, sold under the Mark V DS200 series because these drives are frequently installed as auxiliary or starting equipment on gas turbines controlled by a Speedtronic Mark V panel. It carries multiple power supplies, motor field power circuits, driver circuits for armature SCR gating, and instrumentation for AC line and DC motor signals: armature current and voltage, field current and voltage, voltage magnitude, and phase sequence.

Because it's a G2-group board, this unit is configured for an external field exciter – the reverse of G1-group SDCI boards, which include an internal exciter circuit rated at 10 amps or less. This is a functional difference, not just a label: install a G1 board where the drive expects an external exciter and it will not operate correctly. The SDCI, whichever group, interfaces directly with drive-side field wiring, CTs, and shunts rather than plugging into the Mark V's turbine control cores.

What to Check Before You Replace This Board

The SDCI's fuse protection is designed to guide your troubleshooting rather than leave you guessing. FU1 (115 VAC supply), FU2/FU3 (signal-level power), and FU5/FU6 (internal NRX/MOV assembly) each have a dedicated LED that lights when that fuse blows. When one does:

• Remove all power and let the board discharge fully before you handle it – hazardous voltage can persist after shutdown.
• Trace the field wiring on that circuit for a short or insulation fault before you swap the fuse. A single blown fuse might be incidental; a fuse that keeps blowing is far more often telling you about wiring or a field device, not a bad board.
• Fix the underlying fault first – install a new board before that, and it's likely to blow the same fuse again in short order.

On installation, match the outgoing card's jumper and switch positions exactly: JP1 (MD control source jumper), JP2 (AC contactor drop-out time jumper), SW1 (AC line CT burden selection based on nominal DC output current). And since your drive's exciter wiring dictates whether you need G1 or G2, confirm that before you order rather than assuming the base SDCI number alone is enough to guarantee a match.

Reading This Part Number

DS200 is the board series prefix, SDCI is the DC Power Supply and Instrumentation function, G2 is the product group (external field exciter), and HB is this unit's revision combination. GE's manual reference for this board family is GEI-100173. Because G1 and G2 reflect a genuine wiring difference rather than a simple revision sequence, always confirm the group against your drive's actual exciter setup.

Related Boards and the Bigger Picture

The SDCI sits on the drive/exciter side of the system, so it isn't grouped with Mark V control-core boards like TCDA or TCEA in day-to-day troubleshooting. For context on how the SDCI's numbering relates to the wider Mark V DS200 board family, see our GE Mark V DS200 Boards Explained guide and the GE Speedtronic Part Number Decoder. If your facility is planning a longer-term platform change, our Mark V vs Mark VI: DS200 to IS200 guide covers the general shift to GE's later architecture.

Information We Need to Quote This

• Full part number and suffix, e.g., DS200SDCIG2AHB
• A photo of the existing card's label
• Drive/turbine model and confirmation of internal vs. external exciter
• Quantity required
• Urgency – planning ahead or an active fault

Request a Quote

This DS200SDCIG2AHB is offered used, clean and tested, with a 1-year warranty (see below). We keep pricing off our website 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 DS200SDCIG2AHB DC Power Supply and Instrumentation Board
Condition	used Clean and Tested. With 1 Year Warranty.