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Speedtronic Mark IV Control System Parts

GE Speedtronic Mark IV Turbine Control System — DS3800 Series

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About Speedtronic Mark IV

The GE Speedtronic Mark IV is a legacy turbine control system widely used on Frame 5, Frame 6, and Frame 7 gas turbines. Introduced in the 1980s, it uses the DS3800 series of printed circuit boards for all control, protection, and monitoring functions. Despite being a legacy system, thousands of Mark IV units remain in service worldwide. Kopintra Industrial Group maintains extensive inventory of DS3800 boards including processor cards, I/O boards, relay drivers, power supplies, and communication modules.

Specifications: Board series: DS3800 | Architecture: Triple Modular Redundant (TMR) | I/O: Analog & Digital | Communication: ARCNET

Applications: GE Frame 5, Frame 6B, Frame 7EA gas turbines, steam turbines, compressor drives

DS3800 Series Parts in Stock

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Other Speedtronic Generations

Speedtronic Mark V (DS200) Speedtronic Mark VI (IS200/IS215) Speedtronic Mark VIe (IS220/IS230) All Speedtronic Parts

Frequently Asked Questions - Speedtronic Mark IV

What DS3800 boards are most commonly needed?
The most requested Mark IV boards include DS3800HMPK (processor), DS3800NPPC (power supply), DS3800DEPB (excitation), DS3800HAIA (analog input), and DS3800DMPC (digital output) cards.
Are Mark IV DS3800 boards still available?
Yes, Kopintra Industrial Group maintains stock of DS3800 boards through our global network. Many boards are available from stock or with short lead times.
Can Mark IV be upgraded to Mark VI or Mark VIe?
Yes, GE offers migration paths from Mark IV to Mark VIe. However, many operators choose to maintain their Mark IV systems due to the significant cost of migration. We support both strategies.
Do you offer repair services for DS3800 boards?
We can connect you with certified repair facilities that specialize in DS3800 board repair and testing. Many boards can be economically repaired rather than replaced.
How do I identify which DS3800 board I need?
Each DS3800 board has a unique suffix identifying its function (e.g., HMPK = processor, NPPC = power supply). Contact us with your board designation or turbine application and we will identify the correct part.

Need DS3800 Boards?

Contact our team for pricing and availability on all Speedtronic Mark IV components.

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