Intel® Server Board SE7520JR2

Connectors and Jumper Blocks

There are two SSI compliant processor fan headers, CPU1 (J7F1) and CPU2 (J5F2), which are not fan speed controlled. They are powered by a constant +12V. The pinout for these two connector is defined in the following table.

Table 106: CPU1/CPU2 Fan Connector Pin-out (J5F2, J7F1)

Pin

Signal Name

Type

Description

1

Fan Tach

Out

FAN_TACH signal is connected to the BMC to monitor the FAN speed

 

 

 

 

2

+12V

Power

Power Supply 12V

 

 

 

 

3

Ground

GND

GROUND is the power supply ground

 

 

 

 

The fan headers at J3K3 and J3K6 have fan speed control. Fan control is performed by two pulse width modulator (PWM) outputs on the LM93. The mBMC initializes the LM93 to control fan speeds based on temperature measurements according to a built-in table. The table itself is loaded as part of the SDR package according to which system configuration is used.

The 2x12 fan header (J3K6) is used to control system fans in both the Intel Server Chassis SR1400 and SR2400. The pinout for this connector is found in the following table.

Table 107: Intel Server Chassis Fan Header Pin-out (J3K6)

Pin

Signal Name

Type

Description

1

BB_FAN_LED4_R

IN

 

 

 

 

 

2

BB_FAN_LED2_R

IN

 

 

 

 

 

3

BB_FAN_LED3_R

IN

 

 

 

 

 

4

BB_FAN_LED1_R

IN

 

 

 

 

 

5

FAN_TACH8

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

6

FAN_TACH4

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

7

FAN_TACH7

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

8

FAN_TACH3

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

9

FAN_TACH6

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

10

FAN_TACH2

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

11

FAN_TACH5

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

12

FAN_TACH1

OUT

FAN_TACH signal to monitor the FAN speed

 

 

 

 

13

GROUND

GROUND

 

 

 

 

 

14

GROUND

GROUND

 

 

 

 

 

15

GROUND

GROUND

 

 

 

 

 

16

GROUND

GROUND

 

 

 

 

 

17

FAN_SPEED_CNTL_2

IN

Power supplied through fan speed control circuitry

 

 

 

 

18

FAN_SPEED_CNTL_1

IN

Power supplied through fan speed control circuitry

 

 

 

 

19

FAN_SPEED_CNTL_2

IN

Power supplied through fan speed control circuitry

 

 

 

 

20

FAN_SPEED_CNTL_2

IN

Power supplied through fan speed control circuitry

 

 

 

 

21

BB_FAN_LED7_R

IN

 

 

 

 

 

22

BB_FAN_LED5_R

IN

 

 

 

 

 

23

BB_FAN_LED8_R

IN

 

 

 

 

 

Revision 1.0

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C78844-002