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ASUS P3C-D User’s Manual
Connectors
3. H/W SETUP
3. HARDWARE SETUP
14) Chassis Intrusion Alarm Lead (4-1 pin CHASSIS)
This requires an external detection mechanism such as a chassis intrusion moni-
tor/sensor or microswitch. The sensor is triggered when a high level signal is
sent to the Chassis Signal lead, which occurs when a panel switch or light detec-
tor is triggered.
P3C-D
P3C-D Chassis Open Alarm Lead
+5V
olt
(Power Supply Stand By)
Ground Chassis Signal
CHASSIS
1
15) CPU Fan (2), Power Supply, I/O card Fan Connectors
(3-pin CPU_Fan1, CPU_Fan2, PWR_Fan, CHA_FAN)
These connectors support cooling fans of 500mA (6W) or less. Orientate the
fans so that the heat sink fins allow airflow to go across the onboard heat sink(s)
instead of the expansion slots. Depending on the fan manufacturer, the wiring
and plug may be different. The red wire should be positive, while the black
should be ground. Connect the fan’s plug to the board taking into consideration
the polarity of the connector. NOTE: The “Rotation” signal is to be used only
by a specially designed fan with rotation signal. The Rotations per Minute (RPM)
can be monitored using ASUS PC Probe Utility or Intel LDCM Utility (see 6.
Software Reference).
WARNING!
The CPU and/or motherboard will overheat if there is no airflow
across the CPU and onboard heatsinks. Damage may occur to the motherboard
and/or the CPU fan if these pins are incorrectly used. These are not jumpers,
do not place jumper caps over these pins.
P3C-D
P3C-D 12-Volt Cooling Fan Power
CPU_Fan2
CPU_Fan1
GND
Rotation
+12V
CHA_FAN
PWR_Fan
