Fan Headers; Fan Control Cable Connector; Discrete System Fan Connector; Table 42. Baseboard Fan Connector - Intel S2600KPFR Product Specifications

Technical Product Specification

6.5 Fan Headers

6.5.1 FAN Control Cable Connector

To facilitate the connection of 3 double rotor fans, a 14 pin header is provided, all fans will
share a PWM. Both rotor tachs can be monitored.
Pin
1
3
5
7
9
11
13
The SMBus* is used to connect to the hot swap controller that provides inrush current
protection and can measure the power being used by the compute module. The NODE_ON
signal is used to turn on the hot swap controller. Note that the polarity is correct as the
ADM1275 controller uses a high true enable signal. When the compute module is turned off,
the fans will continue to rotate at a preset rate; this rate is selected by Intel and preset by the
Fan manufacturer. This is done to stop air recirculation between compute modules. When
docking the board to a live 12V rail, the fans could spin up immediately; they may be required
to phase their connection to power to minimize the inrush current. Bench testing of the fans
should determine if this is necessary.

6.5.2 Discrete System FAN Connector

To support the 3 rd party chassis, three discrete system fan connectors are provided on
baseboard. They are used for connecting FANs with tach meters directly.
Fan 1
Pin Signal Description
1 GND
2 P12V
3 BMC_TACH0_R
4 PWM0
5 GND
6 P12V
7 BMC_TACH1_R
8 PWM0
Revision 1.37

Table 42. Baseboard Fan Connector

Signal Name
FAN_PWM_OUT
FAN_BMC_TACH0
FAN_BMC_TACH2
FAN_BMC_TACH4
PS_HOTSWAP_EN
SMB_HOST_3V3/V4_CLK
NODE_ADR0(GND)

Table 43. Baseboard Fan Connector

Pin Signal Description
1 GND
2 P12V
3 BMC_TACH2_R
4 PWM0
5 GND
6 P12V
7 BMC_TACH3_R
8 PWM0
Pin Signal Name
2 Key
4 FAN_BMC_TACH1
6 FAN_BMC_TACH3
8 FAN_BMC_TACH5
10 GND
12 SMB_HOST_3V3/V4_DATA
14 PWRGD_PS_PWROK
Fan 2
Pin
1
2
3
4
5
6
7
8
Connector and Header
Fan 3
Signal Description
GND
P12V
BMC_TACH4_R
PWM0
GND
P12V
BMC_TACH5_R
PWM0
83