Advantech PCA-6181, Manual, Page: 38 / 126

2 4 PCA-6181 User's Manual
2.13 ATX Power Control Connectors (CN20
and CN21)
2.13.1 ATX feature connector (CN20) and soft power switch
connector (CN21)
The PCA-6181 can support an advanced soft power switch function if
an ATX power supply is used. To enable the soft power switch
function:
1. Take the specially designed ATX-to-PS/2 power cable out of the
accessory bag.
2. Connect the 3-pin plug of the cable to CN20 (ATX feature connec-
tor).
3. Connect the power on/off button to CN21. (A momentary type of
button should be used.)
Note: If you will not be using an ATX power connector,
make sure that pins 2-3 of CN20 are closed.
Warnings: 1. Make sure that you unplug your power supply
when adding or removing expansion cards or other
system components. Failure to do so may cause
severe damage to both your CPU card and expan-
sion cards.
2. ATX power supplies may power on if certain
motherboard components or connections are touched
by metallic objects.
CN20