What IS200DSPXH2DBD Is For

GE's EX2100 static excitation control system relies on the DSPX card — in this case, the IS200DSPXH2DBD — as its Digital Signal Processor Control Board, running the bridge and motor regulator functions plus generator field control. This same board family is also used across GE's Innovation Series drives. A point worth clarifying for anyone assuming this is a turbine-side card: it is not one of the boards in the Mark VI controller's own <R>/<S>/<T> racks. It lives in the excitation system's own VME-style rack and connects to that rack's backplane through a 128-pin, 4-row DIN connector. It gets sold and searched for as part of the Mark VI IS200 family simply because EX2100 excitation and Mark VI turbine control are almost always installed together as a matched pair.

The board's processing core is a digital signal processor running at 60 MHz, working with an application-specific integrated circuit (ASIC) that handles the custom logic and interface tasks around it. Memory is split into FLASH (boot loader, application code, configuration parameters, system history), RAM (active data and code execution), NVRAM (nonvolatile storage), and a small add-only memory block that identifies the board's own revision. On the communications side, two 5 Mb/s ISBus ports (usable as master or slave) and two dedicated TTL serial ports — one for a configuration tool, one for a programming board — handle setup and runtime data. The faceplate is limited to STATUS and FAULT LEDs plus DSP emulator and Engineering monitor connectors; there's nothing field-adjustable on this board by design.

Checks to Run Before You Replace This Board

A DSPX-related alarm doesn't automatically mean the card is bad. Before ordering a replacement, work through:

• Redundancy comparison — EX2100 regulators generally run multiple DSPX channels. If only one is alarming while the rest are clean, look at configuration and firmware version before condemning the hardware.
• Backplane seating and power — confirm the card is fully seated in its 128-pin connector and that the exciter's power supply board is putting out healthy rails; a marginal connection or sagging rail can look exactly like a processor fault.
• Communications vs. hardware fault — a break in the link between DSPX channels can surface as a DSPX alarm even when the board itself is fine.
• Re-commissioning — a fresh DSPX doesn't come preloaded with your application code or configuration. That has to go in through the exciter's tool port and the Control System Toolbox before the board will behave correctly.

If the fault stays put after all of that, you're dealing with a genuine board failure and replacement is the right call.

What the IS200DSPXH2DBD Suffix Means

Breaking down the string: IS200 is the platform prefix, DSPX is the four-letter function code, and H2DBD is the group/revision suffix, where H2 marks the group/generation and DBD marks the specific hardware and artwork revision. Quote and order the full IS200DSPXH2DBD part number rather than just "DSPX" — GE does not guarantee interchangeability across every revision within a group. Our GE Speedtronic Part Number Decoder covers how to read these strings in detail, including on worn or partial labels.

Related Boards

The DSPX shares the EX2100 rack with the exciter's main I/O board, its power supply board, and the interface card that connects multiple DSPX channels together. If you're also maintaining older Mark IV or Mark V equipment, GE's part numbering for this hardware generation moved from DS200 prefixes to the IS200 prefixes now used on Mark VI and EX2100 systems; see our Mark V vs Mark VI: DS200 to IS200 guide and GE Mark V DS200 Boards Explained article. The rest of the current family is available in our GE Mark VI IS200 Boards collection and the broader GE Speedtronic Turbine Control Boards collection.

Details to Send With Your Quote Request

• Full part number with suffix: IS200DSPXH2DBD
• Revision letter/code from the label
• Photo of the ID label
• Exciter/turbine model and unit number
• Planned outage or urgent/unplanned need
• Quantity

Request a Quote

This IS200DSPXH2DBD is listed in used condition, cleaned and tested, with a 1-year warranty (see table below). We quote every order individually rather than publishing prices — submit a Request a Quote and you'll hear back within 24 hours. Worldwide DDP shipping and purchase orders are both available, for planned work or urgent turnarounds alike.

General Information about the Product
Part Number	IS200DSPXH2D Mark VI IS200
Description	GE General Electric IS200DSPXH2D IS200DSPXH2DBD DSP Control Board Mark VI
Condition	used Cleaned and Tested. 1 Year Warranty.