The PB926EJ-S can be powered from one of the following sources:
the supplied power supply connected to J35
a bench power supply connected to the screw terminals on header J34
an external PCI bus.
Do not supply more than one power source. If you are using the baseboard with the PCI enclosure for example, do not connect a power source to J35 or J34.
To avoid a safety hazard, only connect Safety Extra Low Voltage (SELV) equipment to the connectors on the PB926EJ-S.