Manual

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. Insufcient air ow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
CHA_FAN2
VCC
CHA FAN IN
CHA FAN PWR
GND
VCC
CHA FAN IN
CHA 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