28 PCA-6751 Series User's Manual
2.24 ATX Feature Connector (CN27)
When the PCA-6751 is used as a standalone card, both the main
power connector (CN20) and the ATX feature connector (CN27) must
be connected to the power supply. If the PCA-6751 is used with a
passive backplane, the main power connector (CN20) should not be
connected. This is because the card will be powered from the back-
plane.
Figure 2-4: ATX adaptor cable
The ATX adapter cable (provided) is used to connect the PCA-6751
to the ATX power supply. The ATX adapter cable has different
connectors at both ends. On one end is the ATX 20-pin (female type)
which connects to the (male) ATX power supply source. The other
end has a 3-pin connector (female type) which connects to the ATX
feature connector (CN27) on the board itself. This end also has the
6-pin main power connector (P8) and a 6-pin connector (P9) which is
used when the board is mounted on a passive backplane.
P9
P8
P9
P8
To ATX feature
connector (CN27)
(P8) 6-pin in backplane
(P9) 6-pin in backplane
ATX power supply source
20-pin female connector
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