AAEON EMB-Q77B - Manual (Page 27)

2-19 Chapter 2: Motherboard information
CAUTION: 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!
NOTE: The CPU_FAN connector supports a CPU fan of maximum 2A (24 W)
fan power.
2. CPU and chassis fan connectors (4-pin CPU_FAN, 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.
EMB-Q77B CPU fan connector
CPU_FAN
GND
VCC
SENSE
PWM
3 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.
EMB-Q77B Chassis intrusion connector
No Intrudor Intrudor Intrudor
PIN1
CHASSIS