Power Led (Jfp3); External Speaker (Jfp1+Jfp2 Pins 1, 4, 7, 10); Hdd Led Connector (Jfp1+Jfp2 Pins 2 & 5); Reset Connector (Jfp1+Jfp2 Pins 9 & 12) - Advantech ASMB-831 Series User Manual

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.
Table 2.1: ATX Power Supply LED Status
ACPI Power Mode
System On (S0)
System Hibernation (S4)
System Off (S5)
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-831 provides
an onboard buzzer as an alternative. To enable the buzzer, set pins 7-10 as closed.
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.
2.9.4 Reset Connector (JFP1+JFP2 Pins 9 & 12)
Many computer cases offer the convenience of a reset button.
ASMB-831 User Manual
LED (ATX power)
On
Slow flashes
Off
1 2 3
+ -
1 4 7 10
+ -
+
2 5
9 12
18