DS200DCFBG1BNC, Open-Box Spare Stock

This DS200DCFBG1BNC is a 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, offered here as new-surplus, open-box material. The board delivers 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). It 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 is wired directly into the SDCC drive control card (or LDCC on EX2000 systems) via the 1PL and 2PL connectors. The CPT's 38 VAC input is rectified and filtered to ±24 VDC (+24 V at 3 A, -24 V at 1 A); onboard regulators derive ±15 VDC from that, and the +24 VDC rail also produces a +5 VDC, 4 A output that keeps the drive control card's microprocessor running.

About This Open-Box Unit

Open-box in our listings means genuine new-surplus, factory-sourced stock that has been removed from its original retail packaging – typically for inspection or inventory handling – but never installed or field-used. It carries the same 1-year warranty as our other new-surplus boards; ask for label photos with your quote request if cosmetic condition matters to your program.

Know How to Diagnose This Board Before You Need It

Since this unit likely goes into a spares program, it's worth understanding in advance that a DCFB fault and an SDCC/LDCC fault can look identical. The DCFB's /PSEN signal on 2PL sits TTL-low while its +5 VDC output is properly regulated, and goes high – forcing an SDCC/LDCC microprocessor reset – the moment that rail sags. A drive or exciter that resets on its own can be telling you about the DCFB, not the drive control card. When troubleshooting later:

• Check the DCFB's fuse-status indicators first. 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, on the 115 VAC fan output).
• Measure the +5 V and ±24 V rails feeding the SDCC/LDCC before assuming its own logic has failed.
• Don't assume a repeat failure is a bad batch of boards. Experienced technicians on Mark V/EX2000 systems consistently find that a card position failing again and again points to a field device, wiring, voltage, or current problem downstream.
• Keep the companion drive control card in mind. There are documented cases of a DCFB and its companion LDCC failing together where a burnt capacitor on the LDCC was the real cause. Since GE never released full schematics for this card generation, a specialized repair shop with card-level test equipment is often the fastest way to a confirmed answer.

What G1BNC Means

DS200 is the board series prefix, DCFB is the Power Supply Board acronym, G1 is the product grouping, and BNC is this unit's specific functional and artwork revision combination. GE's manual reference is GEI-100028. We haven't found a documented functional split between G1 and G2 DCFB groups, so treat the group letter as a hardware revision marker and match the full suffix on your existing card.

Related Boards and the Bigger Picture

The DCFB pairs with the SDCC (or LDCC on EX2000) drive control card and the panel's TCPS power supply. For plants weighing a platform migration, 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 complete part number and suffix, e.g., DS200DCFBG1BNC
• A photo of the existing card's label
• Turbine/generator model, and whether this feeds an EX2000 exciter or a DC2000-family drive
• Quantity
• Whether this is for stock or an active requirement

Request a Quote

This DS200DCFBG1BNC is new-surplus, open-box, factory-packaged stock with a 1-year warranty (see below). Pricing isn't published online since these quotes depend on exact revision match and current 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	GE General Electric DS200DCFBG1B DS200DCFBG1BNC Power Supply Board Mark V OPEN BOX
Condition	newSurplusNoBox Factory Packaged. With 1 Year Warranty.