Datasheet

Cooling Subsystem Intel® Server System SR2500AL
Revision – 1.00
Intel order number D31980-004
22
• 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.
Table 14. Non-redundant Fan Connector Pin Assingment
Pin Signal Name Description
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.
2
1
3
Figure 16. Non-Redundant Fan Header Assignments on Mid-plane