Advantech PCA-6179, User Manual

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Chapter 2 Connecting Peripherals 3 1
2.13 Front Panel Connectors (CN16, CN17,
CN18, CN19, CN21 and CN22)
There are several external switches to monitor and control the
PCA-6179.
2.13.1 Keyboard lock and power 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-6179 provides an on-board 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.
CN16
CN18
J1
CN17
CN22
CN21
CN19