Asus A55BM-PLUS - Manual (Page 25)

ASUS A55BM-PLUS 1-17
1.9.2 Internal connectors
1. CPU and chassis fan connectors (4-pin CPU_FAN, and 4-pin CHA_FAN1~2)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
• The CPU_FAN connector supports a CPU fan of maximum 2A (24W) fan power.
• Only the 4-pin CPU_FAN and chassis fan support the ASUS Fan Xpert2 feature.
DO NOT forget to connect the fan cables to the fan connectors. Insufficient air flow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
CHA_FAN2
VCC
CH
A
FAN IN
CH
A
FAN PWR
GND
VCC
CH
A
FAN IN
CH
A
FAN PWR
GND
CHA_FAN1
CPU_FAN
CPU
FAN PWM
CPU
FAN IN
CPU
FAN PWR
GND
A55BM-PLUS
A55BM-PLUS Fan connectors
2. Chassis intrusion connector (4-1 pin CHASSIS)
This connector is for a chassis-mounted intrusion detection sensor or switch. Connect
one end of the chassis intrusion sensor or switch cable to this connector. The chassis
intrusion sensor or switch sends a high-level signal to this connector when a chassis
component is removed or replaced. The signal is then generated as a chassis intrusion
event.
By default, the pins labeled “Intruder” are shorted with a jumper cap. Remove the
jumper caps only when you intend to use the chassis intrusion detection feature.
A55BM-PLUS
A55BM-PLUS Chassis intrusion connector
PIN 1
+5VSB_MB Chassis Signal GND
CHASSIS