Contec SEH-9450-LAS - Manual (Page 22)

3. Hardware Installations
SEH-9450-LAS
15
CPU FAN Connector: FAN1
FAN1 is a 4-pins box-header for the CPU cooling fan power connector. The fan must be a 12V fan.
Pin 3 is for Fan tachometer input. Pin is for PWM Fan output control. Pin 2 is for 12V voltage.
Table 3.5. CPU FAN Connector
PIN No. Function
1 GND
2 POWER
3 FAN
Sense
FAN1
1 2 3 4
4 PWM FAN control
Housing: 5102-04 (molex)
Contact: 5104 (molex)
System FAN Connector: FAN2
FAN2 is a 3-pins box-header for the CPU cooling fan power connector. The fan must be a 12V fan.
Pin 3 is for Fan speed sensor input. Pin 2 is for PWM regulating voltage output.
Table 3.6. System FAN Connector
PIN No. Function
1 GND
2 +12V
FAN2
1 2 3
3 FAN sense
Housing: 5102-03 (molex)
Contact: 5103 (molex)