Advantech ASMB-830 Series, User Manual, Page: 28 / 110

ASMB-830 User Manual 18
There are several external switches and LEDs to monitor and control the ASMB-830.
2.9.1 Power LED (JFP3)
JFP3 pin 1 and pin 3 are for the power LED. Refer to Appendix B for detailed infor -
mation on the pin assignments. If an ATX power supply is used, the system’s power
LED status will be as indicated.
2.9.2 External Speaker (JFP1+JFP2 Pins 1, 4, 7, 10)
JFP1+JFP2 pins 1, 4, 7, and 10 connect to an external speaker. ASMB-830 provides
an onboard buzzer as an alternative. To enable the buzzer, set pins 7-10 as closed.
1 4 7 10
+ -
2.9.3 HDD LED Connector (JFP1+JFP2 Pins 2 & 5)
You can connect an LED to JFP1+JFP2 to indicate when the HDD is active.
+
2 5
JFP1+JFP2
JFP3
JFP1+JFP2
JFP3
Table 2.1: ATX Power Supply LED Status
ACPI Power Mode LED (ATX power)
System On (S0) On
System Hibernation (S4) Slow flashes
System Off (S5) Off
1 2 3
+ -