IS200DSPXH1CAA: Function and Placement

The IS200DSPXH1CAA is a Digital Signal Processor Control Board (DSPX), one of the core processing cards in GE's EX2100 static excitation control system and the related Innovation Series drive platform. It acts as the primary controller for the bridge and motor regulator functions and for generator field control on the exciter. Because so many IS200-numbered boards belong to the Mark VI turbine controller, it's a natural but incorrect assumption that the DSPX sits in the <R>/<S>/<T> control racks — it doesn't. This board plugs into the excitation system's own rack through a 128-pin, 4-row DIN backplane connector, and it's cataloged with Mark VI IS200 boards because EX2100 excitation and Mark VI turbine control are almost always commissioned together on the same generator set.

The processing side pairs a digital signal processor running at 60 MHz with an application-specific integrated circuit (ASIC) that handles custom logic and interface functions the DSP doesn't manage directly. Memory is organized by task: 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 block dedicated to the board's revision identity. On the communications side, two 5 Mb/s ISBus ports (master or slave) and two separate TTL serial ports — one for a configuration tool, one for a programming board — cover setup and runtime needs. The faceplate carries STATUS and FAULT LEDs plus DSP emulator and Engineering monitor connectors; there are no fuses, adjustable components, or user test points on this board.

Before You Swap the Board, Check This First

A DSPX fault indication is a starting point for troubleshooting, not a conclusion. Work through these before ordering a replacement:

• Compare against redundant channels — most EX2100 regulators run multiple DSPX cards, and an isolated alarm on one channel often points to a configuration or firmware mismatch rather than a hardware failure.
• Check backplane seating and power quality — a loose 128-pin connector or a weak rail from the exciter's power supply board can produce fault symptoms identical to a bad processor.
• Distinguish a communications fault from a processor fault — a broken link between DSPX channels can alarm exactly like an internal board failure.
• Budget time for re-commissioning — a replacement board needs your application code (via the tool port) and configuration parameters (via the Control System Toolbox) loaded before it will run correctly.

If the fault remains isolated to this specific card after these checks, the board itself is the likely cause.

How to Read IS200DSPXH1CAA

IS200 is the platform prefix, DSPX is the function code, and H1CAA is the group/revision suffix — H1 for the group/generation, CAA for the specific hardware and artwork revision. When sourcing a replacement, match the complete IS200DSPXH1CAA string; GE revisions are not automatically interchangeable across the board. See our GE Speedtronic Part Number Decoder for the full breakdown of how these codes are structured.

Related Boards

Within the EX2100 rack, this board shares space with the exciter's main I/O board, its power supply board, and the interface card linking multiple DSPX channels. Sites still running Mark IV or Mark V equipment should know that GE's numbering scheme for this hardware generation moved from DS200 prefixes to the IS200 prefixes 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 family is available in our GE Mark VI IS200 Boards collection and the broader GE Speedtronic Turbine Control Boards collection.

What to Send Us for a Quote

• Full part number with suffix: IS200DSPXH1CAA
• Revision from the label
• Photo of the ID label
• Exciter/turbine model and unit ID
• Planned or urgent requirement
• Quantity

Request a Quote

This IS200DSPXH1CAA is original factory packaged and listed as new surplus, with a 1-year warranty (see table below). We quote every order directly rather than posting prices — submit a Request a Quote and you'll hear back within 24 hours. Worldwide DDP shipping and purchase orders are supported for both planned and urgent orders.

General Information about the Product
Part Number	IS200DSPXH1C Mark VI IS200
Description	General Electric IS200DSPXH1C IS200DSPXH1CAA Speedtronic Circuit Printed Board Mark VI NEW
Condition	newSurplusFactoryPackage Original Factory Packaged. With 1 Year Warranty