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Chapter 1: Product introduction
Do not forget to connect the fan cables to the fan connectors. Insufcient air ow inside the
system may damage the motherboard components. These are not jumpers! Do not place
jumper caps on the fan connectors!
• The CPU_FAN connector supports a CPU fan of maximum 2A (24 W) fan power.
• Only the 4-pin CPU fan and CHA FAN can support ASUS FanXpert feature.
F2A85-M2
F2A85-M2 Fan connectors
CHA_FAN2
CHA FAN PWM
CHA FAN IN
CHA FAN PWR
GND
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
CHA FAN PWM
CHA FAN IN
CHA FAN PWR
GND
CHA_FAN1
5. CPU and chassis fan connectors (4-pin CHA_FAN, 4-pin CPU_FAN, and 4-pin
CHA_FAN)
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.
6. 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 instrusion sensor or switch cable to this connector when a
chassis component is removed or replaced. The signal is then generated as a chassis
intrusion event.
By default, the pin labeled “Chassis Signal” and “Ground” are shorted with a jumper
cap. Remove the jumper caps only when you intend to use the chassis intrusion
detecion feature.
F2A85-M2
F2A85-M2 Chassis intrusion connector
CHASSIS
GND
Chassis Signal
+5VSB_MB