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Appendix C. ATX Power Supply
The following notes show how to connect ATX Power Supply to the
backplanes and / or the ISBC card.
A. For backplanes with ATX Connector
1. Please, disconnect the AC cord of the Power Supply from the AC
source to prevent sudden electric surge to the board.
2. Please, check the type of your CPU board. All CPU board listed on
the next page support ATX power supply but has two types of
power switch connection:
2.1. ROCKY-3782EVS (through Power Button & GND):
Connect the ATX power button switch to the pin 17 (power
button) and pin 19 (+5VSB) of CN18 on the board. And connect
the power cable from CN4 of backplane to CN16 of CPU card.
If you want to turn ON the system, just press the button once.
And If you want to turn off the power supply, please press the
ATX power switch button for about 4 seconds.
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B. For the backplanes with ATX power supply
connector
For some SBC without ATX power ON/OFF function, then you can
control the ATX power supply through backplane’s PS ON
connector. Refer to the figure below: for the backplanes with ATX
connector, the connection can be made simply as following:
1. Connect the ON/OFF (ordinary one) switch to Pin 2 (PS ON) and
Pin 3 (GND) of connector CN2
2. You may now turn the power ON/OFF by the power switch
Note
If you have used ATX power supply, and want to change to AT
power supply, you must clear CMOS data(JP3). Otherwise the
board may could not work while applying the AT power supply
to it.
