Advantech PCA-6186 Front Panel Connectors CN16, 17, 18, 19, 21&22, External speaker CN17

2.13 Front Panel Connectors (CN16, 17, 18, 19, 21&22)

There are several external switches to monitor and control the PCA- 6186.

CN16

2.13.1 Power LED and Keyboard Lock (CN16)

CN16 is a 5-pin connector for the keyboard lock and power on 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 2.1: PS/2 or ATX power supply LED status

Power mode	LED (PS/2 power)	LED (ATX power)
System On	On	On
System Suspend	Fast flashes	Fast flashes
System Off	Off	Slow flashes

2.13.2 External speaker (CN17)

CN17 is a 4-pin connector for an extenal speaker. If there is no external speaker, the PCA-6186 provides an onboard buzzer as an alternative. To enable the buzzer, set pins 3-4 as closed

PCA-6186 User’s Manual 22