CMX147786HX
RTD Embedded Technologies, Inc.
18
PCI Bus Expansion Card Power
+5 Volt DC
The +5 volt power pins on the PC/104 Plus PCI bus are directly connected to the +5 volt pins on the
PC/104 connector and the power connector CN3 (pins 2 and 8). +5 volt expansion boards can be
powered directly from these pins.
+3.3 Volt DC
The default source for the +3.3 volt power pins on the PC/104 Plus PCI bus is the power connector
CN3, or a PC/104 Plus power supply. The +3.3V can also be supplied from an on board power con-
verter. The on-board +5 volt to +3.3 volt converter is capable of suppling a maximum of 2 Amps of
3.3 volts to the PCI bus. To use the on-board power supply, change solder blob B3. See
on page 92 for details.
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