About the IS200DSPXH2BEB Digital Signal Processor Board

Stocking a spare IS200DSPXH2BEB ahead of a planned outage is a reasonable move for any site running GE's EX2100 static excitation control system, since this Digital Signal Processor Control Board (DSPX) is the primary controller for the exciter's bridge and motor regulator functions and its generator field control logic. The same DSPX board family also appears on GE's Innovation Series drives, which use the same card architecture. One clarification worth making up front: although this board is cataloged and sold alongside Mark VI IS200 turbine control boards, it is physically part of the excitation system's own rack, not the turbine controller's <R>/<S>/<T> control racks. It connects to the exciter's backplane through a 128-pin, 4-row DIN connector. EX2100 excitation and Mark VI turbine control are typically installed as a matched pair on the same generator, which is why the two board families are stocked and searched for together.

Functionally, the board pairs a digital signal processor running at 60 MHz with an application-specific integrated circuit (ASIC) that handles custom logic and interface tasks. Memory is divided by function: FLASH for the boot loader, application code, configuration parameters, and system history; RAM for active data and code execution; NVRAM for nonvolatile storage; and a small add-only memory area that records the board's revision. Communication runs over two 5 Mb/s ISBus ports (master or slave) and two separate TTL serial ports for a configuration tool and a programming board. The faceplate has STATUS and FAULT LEDs plus dedicated DSP emulator and Engineering monitor connectors, and intentionally has no field-adjustable fuses, trimpots, or test points.

Before You Assume the Board Has Failed

Even with a spare in hand, it's worth confirming the failure is actually on the DSPX before swapping hardware in a live unit:

• Compare the faulting channel against its redundant partners — EX2100 regulators typically run more than one DSPX, and a lone channel alarm often traces back to configuration or firmware mismatch rather than hardware.
• Check that the card is fully seated in the 128-pin backplane connector and that the exciter's power supply board is delivering healthy rails; a marginal connection can mimic a processor failure.
• Rule out a communications fault on the link between DSPX channels, which can present the same way as an internal board fault.
• Plan for re-commissioning: a new DSPX needs your application code loaded through the exciter's tool port and configuration parameters loaded through the Control System Toolbox before it will run correctly — skipping this step will make a good board look bad.

Keeping a factory-sealed spare like this one on the shelf is smart practice, but it's still worth confirming the diagnosis above before pulling it into service.

Reading the IS200DSPXH2BEB Part Number

The string breaks down as the IS200 platform prefix, the DSPX function code, and the H2BEB suffix — H2 identifies the group/generation and BEB identifies the specific hardware and artwork revision. Note that this is a different group (H2) from the H1-series DSPX boards also stocked in this collection; always match the complete part number to what your exciter calls for rather than assuming any DSPX board will do. Our GE Speedtronic Part Number Decoder explains how these strings are structured in more depth.

Related Boards and Legacy Equivalents

In the EX2100 rack, the DSPX works alongside the exciter's main I/O board, its power supply board, and the interface card linking multiple DSPX channels. For sites still supporting older Mark IV/Mark V hardware, GE's numbering for this generation shifted from DS200 prefixes to the IS200 prefixes used on Mark VI and EX2100 equipment; see our Mark V vs Mark VI: DS200 to IS200 guide and GE Mark V DS200 Boards Explained article. Browse the rest of the current lineup in our GE Mark VI IS200 Boards collection or the wider GE Speedtronic Turbine Control Boards collection.

What to Include When You Request a Quote

• Full part number with suffix: IS200DSPXH2BEB
• Revision from the physical label, if available
• Photo of the board's ID label
• Exciter/turbine model and unit ID
• Planned spares stocking vs. urgent need
• Quantity required

Request a Quote

This IS200DSPXH2BEB is listed as new surplus factory package, carrying a 1-year warranty (see the table below for details). We keep this store on a request-a-quote model instead of published pricing, so submit a Request a Quote and expect a reply within 24 hours. We ship worldwide DDP, accept purchase orders, and can support both critical spares programs and urgent breakdown replacement.

General Information about the Product
Part Number	IS200DSPXH2B Mark VI IS200
Description	GE General Electric IS200DSPXH2B IS200DSPXH2BEB Mark VI NEW
Condition	newSurplusFactoryPackage With 1 Year Warranty.