Advantech AIMB-252 - B.10 External Speaker Connector (JFP2; SPEAKER); B.9 Power LED & Keyboard Lock Connector (JFP3); Table B.10: Power LED and Keylock Connector (JFP3); Table B.11:External Speaker Connector (JFP2;SPEAKER)

77 AIMB-252 User Manual
Appendix B Pin Assignments
B.9 Power LED & Keyboard Lock Connector (JFP3)
You can use an LED to indicate when the single board computer is on. Pin 1 of JFP3
supplies the LED's power, and Pin 3 is the ground.
B.10 External Speaker Connector (JFP2/ SPEAKER)
The single board computer has its own buzzer. You can also connect it to the external
speaker on your computer chassis.
Table B.10: Power LED and Keylock Connector (JFP3)
Pin Function
1 LED power (+5 V)
2NC
3GND
4 KEYLOCK#
5GND
Table B.11: External Speaker Connector (JFP2/SPEAKER)
Pin Signal Pin Signal
1SPK+ 2HDDLED+
3 NC 4 HDDLED-
5 SPK_IN 6 SMB_DAATA
7SPK- 8SMB_CLK