DS200DCFBG1BJB: Factory-Packaged Power Supply Board

DS200DCFBG1BJB is a new-surplus, factory-packaged G1-group DCFB – GE's Power Supply Board for the EX2000 excitation control system, also used across the DC2000, CB2000, FC2000, GF2000, ME2000, and AC2000 IGBT drive families. It supplies control-level power to the drive or exciter and 115 VAC to the enclosure cooling fans, using 38 VAC and 115 VAC input from the control power transformer (CPT). The board carries control-level power supplies (+5 V, ±15 V, ±24 V), motor/generator field power circuits, driver circuits for the armature SCR gate pulse generators, and instrumentation circuits for AC line and DC motor signals.

The DCFB interacts directly with the SDCC drive control card (or LDCC on EX2000 systems) over the 1PL and 2PL connectors. Input power from the CPT (38 VAC) is rectified and filtered to ±24 VDC (+24 V at 3 A, -24 V at 1 A), from which onboard regulators derive ±15 VDC, and the +24 VDC rail produces a +5 VDC, 4 A output that the drive control card's microprocessor depends on.

Build Your Diagnostic Plan Now – Before You Ever Need This Spare

Because this board is likely intended for a spares program rather than an immediate swap, it's worth knowing how a DCFB actually fails before assuming this exact card is the fix next time. A DCFB fault and an SDCC/LDCC fault can look identical from the fault code, because the DCFB's /PSEN signal on 2PL goes TTL-low when its +5 VDC output is properly regulated and switches high – forcing an SDCC/LDCC microprocessor reset – the moment that rail sags. A drive or exciter that resets repeatedly can be pointing at the DCFB's power supply rather than the drive control card. Before you reach for a replacement:

• Check the DCFB's onboard fuse indicators. LEDs CR51 and CR55 flag a blown FU2 or FU3 (7 A power-output fuses); a neon lamp at LT1 flags a blown FU1 (1/2 A, protecting the 115 VAC fan output).
• Measure the +5 V and ±24 V rails feeding the SDCC/LDCC before condemning that card's logic.
• Treat a repeat failure in the same position as a wiring issue until proven otherwise. Experienced Mark V/EX2000 technicians consistently report that when a card position keeps failing, the true cause is almost always a field device, wiring, voltage, or current problem downstream – not defective replacement boards.
• Remember the companion card can be the real culprit. There are documented cases of a DCFB and LDCC failing together where a burnt capacitor on the LDCC was the actual root cause, not the DCFB. GE never published full schematics for this card generation, so a specialized repair shop with card-level test equipment is often the surest way to isolate the fault.

Decoding DS200DCFBG1BJB

DS200 is the board series prefix, DCFB is the Power Supply Board acronym, G1 is the product grouping, and BJB is this unit's specific functional and artwork revision combination. GE's manual reference for this board is GEI-100028. We have no documented evidence of a functional split between G1 and G2 DCFB groups, so treat the group letter as a hardware revision and always confirm the exact suffix against the card you're replacing.

Related Boards and Longer-Term Alternatives

The DCFB pairs with the SDCC (or LDCC on EX2000) drive control card and the panel's TCPS power supply. For a longer-term platform view, see our Mark V vs Mark VI: DS200 to IS200 guide. For the mechanics of GE's Speedtronic part numbering, see the GE Speedtronic Part Number Decoder, and for the DCFB's place among other DS200 boards, see GE Mark V DS200 Boards Explained.

What to Send With Your Quote Request

• The full part number and suffix, e.g., DS200DCFBG1BJB
• A photo of your existing card's label, for comparison
• Turbine/generator model and whether it feeds an EX2000 exciter or a DC2000-family drive
• Quantity
• Whether this is for stock or an active requirement

Request a Quote

This DS200DCFBG1BJB is new-surplus, factory-packaged stock with a 1-year warranty (see below). Pricing isn't published online since these quotes depend on exact revision availability – submit a Request a Quote and expect a reply within 24 hours. We ship worldwide DDP, accept purchase orders, and support both spares planning and urgent downtime orders.

General Information about the Product
Part Number	DS200DCFBG1B Mark V DS200
Description	DS200DCFBG1B By General Electric DS200DCFBG1BJB DC Power Supply Board NSFP
Condition	newSurplusFactoryPackage With 1 Year Warranty