Intel® Server Chassis SR1475 / Intel® Server System SR1475NH1-E
Revision 1.0
- 22 -
The following table provides the pin-outs for each dual rotor fan header.
Table 3. Individual Fan Assembly Pin-out (J5J1, J4J1, J4J3, J4J2)
Pin
Signal Name
Description
1
FAN_SPEED_CNTL2
Control the fan speed
2 FAN_FAIL
FAN_TACH
signal
3
GND
Power Supply Ground
4 Reserved
Reserved
5
GND
Power Supply Ground
6
GND
Power Supply Ground
7 FAN_FAIL
FAN_TACH
signal
8
Fan speed control
Variable Speed Fan Power
The single rotor fan has a standard 3 or 4-pin SSI fan header that connects directly to the server
board system fan header #4 (J5J2).
Each fan within the module is capable of supporting multiple speeds. If the internal ambient
temperature of the system exceeds the value programmed into the fan control via BIOS, the
system will automatically increase the rotational speed for all the fans within fan module.
Note:
There is no fan redundancy. Should a fan fail, the system should be shut down as soon
as possible to have the fan replaced. The system fans are not hot-swapable.
2.2 Power Supply Fans
The power supply supports two non-redundant 40mm fans. They are responsible for the cooling
of the power supply and drive bay 1 (the far left hard drive as viewed from the front of the
chassis).
2.3 CPU/Memory Air Duct and Side Air Baffle
The chassis requires the use of a CPU/memory air duct and power supply / electronics bay
isolation air baffle to direct airflow and sustain appropriate air pressure.
An air baffle is used to isolate the airflow of the two power supply fans from that of the system
fan module. The baffle is mounted into three stand-offs with one end fitting under the back
edge of the hard drive bay
Figure 14. Air Baffle
Summary of Contents for SR1475
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