Using Bus Power for the PCIe DAQ

The 900 MS/s version of the Axsun PCIe DAQ (Rev C or later) can optionally draw its power from the host workstation's PSU (power supply unit) via its PCIe edge connector plugged into the workstation motherboard, instead of an external 12V AC/DC adapter plugged into the power input connector J3 via the Power-Y cable.

To configure the DAQ for PCIe bus-powered operation, install two 2.54 mm jumpers (aka shunts) on the 4-position vertical header J14, which is located in proximity to the PCIe edge connector. The installed jumpers must be oriented as indicated by the green rectangles in the photo below.

Jumpers are not supplied by Excelitas, but can be easily procured from various sources, such as here.

Default configuration with no jumpers installed on J14; power must be delivered to DAQ via external supply on J3 connector.
Two jumpers installed on J14 in the correct orientation (green rectangles); DAQ will be powered by workstation PSU via motherboard.

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