cancel
Showing results for 
Search instead for 
Did you mean: 
PaoloneT
New member
3 1 0 0
Message 1 of 3
759
Flag Post

Is the Z27 USB hub self-powered?

HP Recommended
Z27
macOS 10.13 High Sierra

Hi,

 

My Z27 display incorporates an USB hub. I wonder if this hub is self-powered (via the display's power supply), or the power has to be supplied by the bus coming from the computer.

 

This is different, because if you can only rely on bus power, you can be very careful on what you connect. In case, maybe I can use a self-powered USB hub from the computer, to power all the devices connected to the Z27 USB ports.

 

What do you think?

 

Paolo

 

2 REPLIES 2
IronBadger
Level 9
Level 9
857 826 76 279
Message 2 of 3
Flag Post
HP Recommended

On my Z27n G2 monitor the USB hub is powered by the monitor.  I just verified this by disconnecting the USB-C cable and the ports still had power.

While I may work for HP Inc, the views and opinions expressed here are my own.
PaoloneT
Author
New member
3 1 0 0
Message 3 of 3
Flag Post
HP Recommended

Thank you very much for your answer and the report of your experience!

 

I must have some other kind of issue in my configuration, however. After having tried to connect some USB devices requiring too much power in total, my Logitech webcam connected to one of the Z27 USB ports stopped working.

 

When I solved the power issue by redistributing the external drives on various self-powered USB hubs connected to the Mac, the webcam started working again. The webcam alone is requiring 500 mA.

 

Maybe there is still power asked to the bus, before the monitor can power the devices connected to it?

 

Paolo

 

0 Kudos
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation