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What is the difference between Self-powered mode and Bus-powered mode?

April 26, 2017bus-powered mode self-powered

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What is the difference between Self-powered mode and Bus-powered mode?

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A6: • Self-powered mode means the USB Hub is being powered by an external power supply. If a device connected to the Hub needs more power (such as a scanner or a cascaded USB Hub) you will need to connect the adapter. The 3 side ports on the 7-Port USB Hub will only work if in Self-powered mode • Bus-powered mode is when there is no external power supply connected to the USB Hub.