GNP Computers Soft-Switch Control Board 1-501146 SMTK984671128 Rev D PCB

GNP Computers Soft-Switch Control Board 1-501146 SMTK984671128 Rev D PCB

This is a GNP Computers Soft-Switch Control Board, PCB part number 1-501146, assembly number SMTK984671128, Revision D, date code 970724. Made in the USA, this small-format green PCB carries a central DIP IC package, multiple header connectors, resistor networks, and labeled pads for status LEDs and CPU/GPU temperature sensor connections. It appears to be a system control or power sequencing board from the GNP PDSi family of embedded computing products.

Specifications & What's Included

• Manufacturer: GNP Computers (GNP PDSi)
• PCB Part Number: 1-501146
• Assembly / Serial Label: SMTK984671128
• Secondary Part Number (label): 1-501147FR
• Revision: Rev D
• PCB Date Code: 970724
• Country of Manufacture: Made in the USA
• Main IC: one large DIP package (central on board — markings not fully legible in photos)
• Header connectors: multiple 2-pin and multi-pin headers for sensor and power connections
• Labeled pads/silkscreen: CPU Temp Sensor 1, CPU Temp Sensor 2, Status LED, Power LED, Rear Run LED
• Resistor networks: R1100, R1101, R1102 visible on PCB silkscreen
• Mounting holes: four corner through-holes for chassis mounting
• Board only — no cables, brackets, or accessories included

Applications

GNP Computers (also known as GNP PDSi) was a US-based manufacturer of single-board computers and embedded computing systems, active primarily through the 1990s and into the early 2000s. Their boards were used in VMEbus, CompactPCI, and proprietary embedded system platforms for defense, industrial automation, scientific instrumentation, and telecommunications applications. A Soft-Switch Control Board of this type typically handles power sequencing, system reset logic, front-panel control signals, and thermal monitoring — functions that manage how the host system powers on, resets, and monitors temperature sensors. The date code of 970724 places this board's manufacture in July 1997, situating it squarely in the mid-to-late 1990s era of GNP's embedded systems product line. This type of board is sought by engineers maintaining legacy GNP-based systems, as well as by researchers and integrators working with period-correct embedded computing platforms.