Intel SERVER CHASSIS SR2500 SR2500 사용자 설명서

Intel® Server System SR2500AL 

 

1 Tachometer 

B 

Reserved, unused by redundant fan 

2 

PWM 

Fan speed control signal 

3 

12V 

Power for fan 

4 

12V 

Power for fan 

5 

Tachometer A 

Fan RPM sensor output 
Two pulses per revolution for the 80mm fan 
Four pulses per revolution for the 60mm fan 

6 

Return 

Return path to ground 

7 

Return 

Return path to ground 

8 

Fan Presence 

Detection if fan is installed in system 

9 

LED Cathode 

LED in fan 

10 

LED Anode 

Reserved, unused by the redundant fan 

 

The system fans are hot-pluggable and do not have any cable connections.  They mate directly 
to the fan module.  The system fan module plugs into headers on the mid-plane board 
according the following diagram. 

AF000049