Advantech PCA-6275 manual Front Panel Connectors CN10, CN11, CN12, CN13 and J3

2.8Front Panel Connectors

(CN10, CN11, CN12, CN13 and J3)

There are several external switches to monitor and control the PCA-6275.

2.8.1 External speaker (CN10)

CN10 is a 4-pin connector for an extenal speaker connection. If there is no external speaker, the PCA-6275 provides an on-board buzzer as an alternative. To enable the buzzer, set pins 3-4 as closed.

2.8.2 Keyboard lock and power on LED (CN11)

CN11 is a 5-pin connector for the "keyboard lock" and "power on" LED connection. Refer to Appendix B.12 for detailed information on the pin assignments. The system's power LED status is indicated below, according to the power supply used:

Power Mode	LED (PS/2 Power)	LED (ATX Power)
System On	On	On
System Suspend	Flashes fast	Flashes fast
System Off	Off	Flashes slowly

If an ATX power supply is used, refer to Section 2.5.1.

2.8.3 IDE LED (CN12)

You can connect an LED to connector CN12 to indicate when the HDD is active.

2.8.4 Reset (CN13)

Many computer cases offer the convenience of a reset button. Connect the wire from the reset button to CN13.

2.8.5 ATX soft power switch (J3)

If your computer case is equipped with an ATX power supply, you should connect the power on/off button on your computer case to J3. This connection enables you to turn your computer on and off.

28PCA-6275 User's Manual