Intel SERVER CHASSIS SR2500 SR2500 Manual De Usuario

Intel® Server System SR2500AL 

•  Each fan has an associated fault LED on the mid-plane located next to the fan header.  

In the event of a fan failure, the fault LED for the failing fan can be illuminated by system 
management.  

 

1 Tachometer 

B 

Reserved, 

unused by the non-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 pulse 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 

Reserved, 

unused by the non-redundant fan 

9 

LED Cathode 

Loopback signal to pin 10 

10 

LED Anode 

Loopback signal to pin 9 

The system fans plug into headers on the mid-plane board according to the following diagram.