Canon P-150 - Manual (Page 9)

9
D
Close the feeder cover.
Power Supply
This scanner is powered via the supplied USB cables.
(The USB connector to which the scanner is connected on your
computer must be one capable of supplying 500 mA of power.)
Using One USB Cable
Using the USB cable allows you to scan using power from the
computer’s bus.
Using Both USB Cables
The combined use of the USB cable and the power supply USB cable,
allows you to scan at a higher speed.
When using the AC adapter (sold separately)
Using the AC adapter, you can obtain better scanning speed than
when using the USB cable by itself.
When not using the scanner
Close the scanner's Document Feed Tray or disconnect the USB cable.
Notes on Using USB Hubs
This scanner cannot be used when it is connected to the computer
via a bus-powered USB hub. Self-powered USB hubs are
compatible, but operation is not guaranteed.
To power outlet