QDI P6I440EX/MATX EXCELLENT II, Manual

Page: 25 / 52

Chapter 2
2 - 1
Chapter 2
Connector Configuration
This section lists all connector pin assignment and port descriptions on the
mainboard. The particular state of the connectors and ports are illustrated in the
following figures. Before inserting these connectors, please pay attention to the
directions.
Power Connector(J20, J21) & Power Switch (Power)
ATX/SFX power supply can both be used on this system. They should be connected
to J20, while the power switch(Power) should be connected to a momentary switch.
When powering up your system, first turn on the mechanical switch of the power
supply if one is provided, then push once the button of the momentary switch. If you
want to power off your system, you needn’t turn off the mechanical switch, just
push
once* the button of the momentary switch.
J21 is an optional 6-pin power connector mainly used for the power supply which
has an identical connector. The pin assignment and the location of the connectors
are as shown below:
Note:
* If you change “soft-off by PWR-BTTN” from default “Instant-off” to
“Delay 4 Secs”, the power button should be pressed for more than 4
seconds before the system powers down.
For details, please refer to Page 3-10.
** This optional signal (-5V) is not available in the
SFX power supply.
Hard Disk LED Connector(HD_LED)
PIN NUMBER FUNCTION
1 LED ANODE
Power Connector (J20)
Optional Power Connector (J21)
Power
Fan monitoring
Fan control
3.3V Sense
NC
NC
NC
**