Asus AP1720-E1 - Manual (Page 53)

ASUS PC-DL Deluxe motherboard 2-27
8. CPU, Chassis, and Power Fan Connectors (3-pin CHA_FAN1,
CPU_FAN1, CPU_FAN2, SYS_FAN1, SYS_FAN2)
The fan connectors support cooling fans of 350mA~740mA (8.88W
max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan
cables to the fan connectors on the motherboard, making sure that the
black wire of each cable matches the ground pin of the connector.
Do not forget to connect the fan cables to the fan connectors. Lack of
sufficient air flow within the system may damage the motherboard
components. These are not jumpers! DO NOT place jumper caps on
the fan connectors!
7. Chassis intrusion connector (4-1 pin CHASSIS1)
This lead is for a chassis designed with intrusion detection feature.
This requires an external detection mechanism such as a chassis
intrusion sensor or microswitch. When you remove any chassis
component, the sensor triggers and sends a high-level signal to this
lead to record a chassis intrusion event.
By default, the pins labeled “Chassis Signal” and “Ground” are shorted
with a jumper cap. If you wish to use the chassis intrusion detection
feature, remove the jumper cap from the pins.
PC-DL
PC-DL Chassis Open Alarm Lead
CHASSIS1
+5V
olt
(Power Supply Stand By)
Chassis Signal
Ground
PC-DL
PC-DL 12-Volt Cooling Fan Power
GND
Rotation
+12V
CHA_FAN1
GND
Rotation
+12V
GND
Rotation
+12V
GND
Rotation
+12V
CPU_FAN1
CPU_FAN2
SYS_FAN2
SYS_FAN1
GND Rotation +12V