© National Instruments
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B-9
Speaker/Buzzer
On the JD1 header, pins 1-4 are for the speaker and pins 3-4 are for the buzzer. If you wish to
use an external speaker, connect its cable to pins 1-4.
SGPIO Headers
The I-SGPIO1 (Serial General Purpose Input/Output) header is used to communicate with the
enclosure management chip on the backplane.
Table B-9.
Fan Header Pin Definitions
Pin
Definition
1
Ground (Black)
2
2.5 A/+12 V (Red)
3
Tachometer
4
PWM_Control
Table B-10.
Speaker Connection Pin Definitions
Pin Setting
Definition
Pins 1-4
Speaker
Pins 3-4
Buzzer
Table B-11.
SGPIO Header Pin Definitions
Pin
Definition
Pin
Definition
1
NC
2
NC
3
GND
4
Data
5
Load
6
GND
7
Clock
8
NC
NC = No Connection