Hellriegel replied to the topic 'USB hubs - a never ending story' in the forum. 5 years ago

stash is correct about the power consumption of DSLRs as well as all separately powered devices draw hardly any current from the hub.
However beware that non-powered USB2 devices can draw up to 0.5 A and USB3 devices up to 0.9A per port. Using a 10 port hub with a 2.5A power supply might be on the low side.
To complicate things even more the USB-C connector (which I have not seen on astro devices yet but only on cell phones and tablets) may draw up to 3A per port. So don't charge Your cell phone from the same hub when using it for internet connections ;-)

And to top all this: USB-PD (USB Power Delivery) may request 5V, 12V or even 20V and up to 5A (= 100W max power) from the charging device! These values are considered for USB connected displays for example. But it will take some time before we see devices like these at our telescopes.

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