Advantech PCA-6359 Front Panel Connectors CN16, CN17, CN18, CN19 and CN21, External speaker CN17

2.13Front Panel Connectors

(CN16, CN17, CN18, CN19 and CN21)

There are several external switches to monitor and control the PCA-6359 Series.

2.13.1 Keyboard lock and power on LED (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 2-2: 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-6359 Series provides an onboard buzzer as an alternative. To enable the buzzer, set pins 3-4 as closed.

2.13.3 Reset (CN18)

Many computer cases offer the convenience of a reset button. Connect the wire from the reset button to CN18.

2.13.4 IDE LED (CN19)

You can connect an LED to connector CN19 to indicate when the HDD is active.

Chapter 2 Connecting Peripherals 27