New Surplus IS200DSPXH1DBD: What You're Getting

This listing covers an unused, factory-packaged IS200DSPXH1DBD — GE's Digital Signal Processor Control Board (DSPX) for the EX2100 static excitation control system, also used across the Innovation Series drive line. As the primary controller for the bridge and motor regulator functions and generator field control on an EX2100 exciter, this is a board worth having on the shelf rather than sourcing under time pressure. It's worth repeating a point that catches out a lot of buyers: this card lives in the excitation system's own rack, connected through a 128-pin, 4-row DIN backplane connector — not inside the Mark VI turbine controller's <R>/<S>/<T> racks. It's grouped with Mark VI IS200 boards in parts catalogs because EX2100 excitation and Mark VI turbine control are typically installed and maintained as a pair.

Technically, the board runs a digital signal processor at 60 MHz alongside an application-specific integrated circuit (ASIC) that manages custom logic and interface functions. FLASH memory stores the boot loader, application code, configuration parameters, and system history; RAM handles active processing; NVRAM retains nonvolatile data; and a small add-only memory block records the board's revision. It communicates over two 5 Mb/s ISBus ports (master or slave) and two dedicated TTL serial ports for a configuration tool and a programming board. The faceplate is limited to STATUS and FAULT LEDs and DSP emulator / Engineering monitor connectors — by design, there's nothing else on the board for a technician to adjust in the field.

Even With a New Spare Ready, Confirm the Diagnosis

Before installing a replacement, however fresh it is, it pays to confirm the fault actually belongs to the DSPX:

• Check the other DSPX channels running in the same regulator — a single alarming channel against otherwise-clean partners often means a configuration or firmware mismatch, not a bad card.
• Verify the 128-pin backplane connector is fully seated and that the exciter's power supply board is putting out clean rails; loose connections and marginal power are common causes of DSPX-looking faults.
• Rule out a communications fault between DSPX channels, which can mimic an internal board failure.
• Set aside time to re-commission the replacement: application code loads through the exciter's tool port, and configuration parameters load through the Control System Toolbox. Skipping this step is one of the most common reasons a "new" board seems to fail immediately after installation.

Once you've ruled out the above, installing this spare should be straightforward.

Decoding the IS200DSPXH1DBD Part Number

IS200 identifies the platform, DSPX identifies the function, and H1DBD is the group/revision suffix — H1 for the group/generation and DBD for the specific hardware and artwork revision. Match the complete string when you're building a spares list; GE does not treat every revision under a group as automatically interchangeable. Our GE Speedtronic Part Number Decoder explains the format in more depth.

Related Boards

Alongside the DSPX in the EX2100 rack, you'll find the exciter's main I/O board, its power supply board, and the interface card that ties multiple DSPX channels together. If your fleet also includes older Mark IV or Mark V units, GE's numbering for this hardware generation moved from DS200 prefixes to the IS200 prefixes used on Mark VI and EX2100 platforms — see our Mark V vs Mark VI: DS200 to IS200 guide and GE Mark V DS200 Boards Explained article. Browse the current lineup in our GE Mark VI IS200 Boards collection or the wider GE Speedtronic Turbine Control Boards collection.

What to Include in Your Quote Request

• Full part number with suffix: IS200DSPXH1DBD
• Revision shown on the label
• Photo of the ID label
• Exciter/turbine model and unit ID
• Spares stocking vs. urgent replacement
• Quantity required

Request a Quote

This IS200DSPXH1DBD is new surplus, factory packaged, and comes with a 1-year warranty (see table below). As with everything in our catalog, pricing is quoted directly rather than posted online — submit a Request a Quote and expect a response within 24 hours. We ship worldwide DDP, accept purchase orders, and support both planned spares programs and urgent replacement needs.

General Information about the Product
Part Number	IS200DSPXH1D Mark VI IS200
Description	IS200DSPXH1D By GE IS200DSPXH1DBD Digital Signal PCB New Surplus Factory Package
Condition	newSurplusFactoryPackage With 1 Year Warranty