Description
Exact revision, firmware/EPROM content, and connector pinout must be verified against the installed Mark IV configuration and GE documentation before installation.
Product Introduction
In a running Mark IV Speedtronic cabinet the processor and interface boards keep the control loops, sequencing, and operator communications synchronized. The GE DS3815PAHB1A1A sits in that role—handling high-level processing or data exchange between the control rack and the rest of the system.
This board is a legacy spare kept specifically for Frame 5, 6, and 7 class turbines still operating on Mark IV hardware. It is not interchangeable with later Mark V or Mark VI modules. Always match the exact part number, revision, and any installed PROMs against the existing board before the swap.
Key Selling Points & Differentiators
- Designed for the Mark IV architecture that uses redundant microcomputers for sequencing, speed, temperature, and protection functions.
- Functions as a processor or high-level interface board that communicates with other DS3800-series cards via the system bus or ribbon connector.
- Direct difference versus a generic DS3800 board: the PAHB designation and 1A1A revision identify a specific processing/interface role; substitution requires confirmation of function and firmware.
- Not recommended for new installations or systems already migrated to Mark V / Mark VI / Mark VIe platforms—the hardware and software are not compatible.
- Every unit receives incoming visual and label inspection, power-up check where feasible, connector and component inspection, and final ESD packaging with dated QC label. Test notes available on request.
- Supports the original Mark IV design intent of reduced downtime through modular, replaceable PCBs while the rest of the rack remains online under proper procedures.
