Power Supply Fans; Cpu/Memory Air Duct And Side Air Baffle; Figure 12. Air Baffle; Table 2. Individual Fan Assy Pinout (J6J1, J6J2, J6J3, J6J4) - Intel SR1425BK1 - Entry Server Platform Technical Specifications

Intel® Server Chassis SC1400UP / Intel® Server Platform SR1425BK1-E
The following table provides the pin-outs for each dual rotor fan header.

Table 2. Individual Fan Assy Pinout (J6J1, J6J2, J6J3, J6J4)

Pin
1 FAN_SPEED_CNTL2
2 FAN_FAIL
3 GND
4 Reserved
5 GND
6 GND
7 FAN_FAIL
8 Fan speed control
The single rotor fan is a standard 3 pin SSI fan header that connects directly to the baseboard
system fan header #4 (JP5J2).
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 thermal sensor data record
(SDR), the Baseboard Management Controller (BMC) firmware will 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 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
The CPU/Memory air duct must be properly installed to direct airflow through the processor
heatsink(s) to the low profile PCI and memory area of the system. The CPU air duct is
Revision 1.0
Signal Name

Figure 12. Air Baffle

Description
Control the fan speed
FAN_TACH signal
Power Supply Ground
Reserved
Power Supply Ground
Power Supply Ground
FAN_TACH signal
Variable Speed Fan Power
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