POE: Can I power several units through a single ethernet cable?

Hardware
1
  • I have run an ethernet cable from my house to my garage – about 50 meters.
  • There are no power outlets in the garage.
  • I want to have a SLZB-06 running as a zigbee coordinator in the garage, through POE.
  • I might want to add more POE devices to the garage, at least a camera, perhaps also a POE wifi hotspot.

Can I accomplish this using a powerful(?) POE injector in my house, and a POE powered POE-switch in the garage?

Specifically these two, for example:

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I am not familiar with POE standards, power consumption etc.

2

In theory yes.
You need enough power to supply the switch and the devices connected to it and the switch need to support PoE pass through.
Beware that the PoE standard the switch supply might be less than what it can accept as input and that might affect more power-hungry devices like APs, which might require more power than the switch can deliver in the pass through.

3

And the specifed products will do this in practice?

4

Can’t say.
You posted pictures and not links, so we can’t read up on them.

5

The PoE injector can supply 60W.

The Flex switch consumes 5W to run and has 25W capable PoE+ ports but can only distribute 46W total across those 4 ports.

The SLZB-06 will consume about 1 to 2W.

So you have 44 to 45W available on the other three ports.

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6

Which should be plenty? (Overkill injector?)

7

For most PoE powered devices, yes.

And yes the injector is overkill but will run nice and cool at the lower load and last longer than if you were say… maxing out a 10W injector. It probably wouldn’t be that much cheaper either.

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8

Thanks for the help!

There are some cheap generic chinese units that seem to do the same thing. How are these different from the USW Flex?

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9

Link?

10

here’s what I got when I googled “poe extender connection nok258.68” But maybe Norway is different or you get a different result.

11

For one these are not managed switches like the Flex.

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12

I use a PoE++ injector to power one of those Unifi Flex switches in my detached garage, and have both a PoE-powered IP security camera and a Unifi access point connected/powered by the Flex switch. My whole home network infrastructure is Ubiquiti Unifi stuff…

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