Front Panel Connectors (Cn16, Cn17, Cn18, Cn19, Cn21 And Cn22); Keyboard Lock And Power Led (Cn16); External Speaker (Cn17); Reset (Cn18) - Advantech PCA-6179 User Manual

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
System On
System Suspend
System Off

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.
CN22
CN21
CN19
LED (PS/2 power)
On
Fast flashes
Off
Chapter 2 Connecting Peripherals
CN18
CN16
J1
CN17
LED (ATX power)
On
Fast flashes
Slow flashes
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