Front Panel Connectors (Cn16, 17, 18, 19, 21&22); Power Led And Keyboard Lock(Cn16); Table 2.2:Ps/2 Or Atx Power Supply Led Status; External Speaker (Cn17) - Advantech PCA-6184 User Manual

2.12 Front Panel Connectors (CN16, 17, 18, 19, 21&22)
There are several external switches to monitor and control the PCA-6184.

2.12.1 Power LED and Keyboard Lock(CN16)

CN16 is a 5-pin connector for the power on LED and Keyboard Lock.
Users can also identify the current power mode through the system's
power LED. Refer to Appendix B for detailed information on the pin
assignments. If a PS/2 or ATX power supply is used, the system's power
LED status will be as indicated below:
Table 2.2: PS/2 or ATX Power Supply LED Status
Power Model
System On
System Suspend
System Off

2.12.2 External speaker (CN17)

CN17 is a 4-pin connector for an extenal speaker. If there is no external
speaker, the PCA-6184 provides an onboard buzzer as an alternative. To
enable the buzzer, set pins 3-4 as closed
PCA-6184 User's Manual
CPU
LED (PS/2 power)
On
Fast Flashes
Off
LED (ATX Power)
On
Fast Flashes
Slow Flashes
22