IS200DSPXH1ADA: Function and Location in the System

If you've pulled a failed board stamped IS200DSPXH1ADA, you're holding a Digital Signal Processor Control Board (DSPX) from GE's EX2100 static excitation control platform — the same board family is also used on GE's Innovation Series drives. The DSPX is the primary controller for the bridge and motor regulator functions and for generator field control on the exciter side. It's easy to assume every IS200-prefixed board sits inside the Mark VI turbine controller's <R>/<S>/<T> racks, but the DSPX actually lives in the excitation system's own card rack, plugging into the backplane through a 128-pin, 4-row DIN connector. Because the static exciter and the Mark VI turbine controller run side by side on the same unit and share the IS200 numbering convention, parts catalogs (including this one) group the DSPX with the rest of the Mark VI IS200 boards — but functionally, it belongs to the exciter, not the turbine sequencer.

Inside the card, a digital signal processor clocked at 60 MHz is paired with an application-specific integrated circuit (ASIC) that carries out custom logic, timing, and interface work. Onboard memory is split by purpose: FLASH for the boot loader, application code, configuration data, and history records; RAM for active data and code execution; NVRAM for nonvolatile storage; and a small add-only memory block that identifies the board's revision. Communication runs over two 5 Mb/s ISBus ports (master or slave) plus separate TTL serial ports for a configuration tool and a programming board. The faceplate carries STATUS and FAULT LEDs and dedicated DSP emulator / Engineering monitor connectors; there are no user-serviceable fuses, test points, or adjustments on this board.

Diagnose Before You Buy a Replacement

Technicians who replace a DSPX on a fault code without checking the surrounding system sometimes find the new board faults the same way. Work through this before ordering:

• Compare channels. These excitation regulators typically run more than one DSPX card for redundancy. If one channel alarms while the others stay clean, the difference is often a configuration or firmware mismatch, not a dead processor.
• Check the physical connection first. The 128-pin backplane connector is a common weak point — a partially seated card or a degraded power rail from the exciter's supply board can throw the same fault pattern as a failed DSPX.
• Separate a communications fault from a processor fault. If the DSPX can't talk to the rest of the exciter over its ISBus link, the alarm can look identical to an internal board failure.
• Plan for re-commissioning. A replacement DSPX ships without your site's application code or configuration loaded. Application code loads through the exciter's tool port and configuration through the Control System Toolbox — skip this step and the new board will fault too.

Once wiring, seating, redundancy, and configuration are ruled out, a persistent fault on this one card points to a genuine DSPX failure.

What the IS200DSPXH1ADA Suffix Tells You

GE's IS200 numbering breaks down into the IS200 platform prefix, the four-letter function code (DSPX), and a grouping/revision suffix — in this case H1ADA, where H1 marks the group/generation and ADA marks the specific hardware and artwork revision. Treat the complete part number, IS200DSPXH1ADA, as what needs to match on your unit; GE does not guarantee that every revision under a given group is interchangeable with every other. Our GE Speedtronic Part Number Decoder walks through how to read the full string if you're working from a faded or partial label.

Related Boards and Older Generations

Within the EX2100 rack, the DSPX shares the backplane with the exciter's main I/O card, its power supply board, and the interface board that links multiple DSPX channels together. If you also support older Mark IV or Mark V equipment, note that GE's part numbering shifted from DS200-prefixed boards to the IS200-prefixed boards 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. The full family is stocked in our GE Mark VI IS200 Boards collection, alongside the broader GE Speedtronic Turbine Control Boards collection.

Information to Include in Your Quote Request

• Complete part number with suffix: IS200DSPXH1ADA
• Hardware revision from the label, if legible
• A photo of the board's ID label
• Exciter/turbine model and unit designation
• Planned outage vs. urgent/unplanned need
• Quantity required

Request a Quote

This particular IS200DSPXH1ADA is in used condition, cleaned and tested, with a 1-year warranty (full details in the table below). Pricing isn't published online because every unit is quoted against your exact requirement — submit a Request a Quote and expect a response within 24 hours. We ship worldwide on a DDP basis, accept purchase orders, and can support both scheduled outages and urgent breakdowns.

General Information about the Product
Part Number	IS200DSPXH1A Mark VI IS200
Description	GE General Electric IS200DSPXH1A IS200DSPXH1ADA Digital Signal Processor Board
Condition	used Cleaned and Tested. With 1 Year Warranty.