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PBE400 almost 525 ft away

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AH6LE
PBE400 almost 525 ft away

I'm doing a new installation of a Ubiquiti PBE400 that will require a cable run of almost 525 feet.

Now, I know I'll need a POE Extender for this but my question is if the 12 watt POE injector that comes with the Powerbeam is adequate to the task or do I need something different? I suspect the 12 watt one isn't.

My plans are to use Ubiquiti Carrier Class Tough Cable for the run but I'm open to less expensive alternatives (but only if it doesn't compromise reliability and ruggedness).

w6bi
w6bi's picture
Cable runs

The specified length limit to Ethernet cable runs is 100 meters (~330 feet).  You're way beyond that.  Because the Powerbeams run 100 Mbits/sec rather than 1 Gbit/sec, you might be able to get away with it.

As far as power goes, they pull no more than about 4 watts.   Your biggest concern there would be voltage drop.  But the nodes will run down to about 11 volts and I don't think you'll have 13 volts of drop across the line.

If you do get it running, run pings with large packet sizes and see if you're dropping any packets across that really long stretch of cable.
Report back - we'd be interested in your results.

Orv W6BI

AH6LE
So you're saying that a POE

So you're saying that a POE Extender won't work with Ubuquiti hardware?

w6bi
w6bi's picture
Ethernet Specs

If it's a true POE extender (that is, a two port network switch that regenerates the timing) yes.   
This may be helpful:  https://homenetworkgeek.com/how-far-can-you-run-an-ethernet-cable/

AH6LE
Exactly my plan. See TexasPOE

Exactly my plan. See https://www.poetexas.com/
Anything and everything running CAT runs over 100 meters

w6bi
w6bi's picture
POE Extender

Excellent - please post your implementation and experiences with it.

AH6LE
Hope to have it installed

Hope to have it installed within the next 2 weeks. (in my best Ahhhnold voice).. I'll be bach.....

nc8q
nc8q's picture
I know I'll need a POE Extender for this

Howdy:

I am somewhat sure that you will need a POE pass-through switch.
I had some random lengths of CAT5 cable laying about.
With a Ubiquiti POE-24-12W I was able to power-up and link my PBE-M5-400
with up to 474 feet of cable, but not with 524 feet of cable.

If you don't need/want any LAN connections,
perhaps a 24 watt POE and a Ubiquiti Nano Switch (N-SW) in between would suffice.

I hope this helps,
Chuck

AH6LE
I called TexasPOE today and

I called TexasPOE today and they said the following would do the trick with the stock 24 v, 12 W POE injector that comes with the PBE-M5-400, guaranteed:

https://shop.poetexas.com/products/pt-poe-extender-beta?variant=12250678165576

I ordered one. Heck for under $20 delivered, worth a try!

nc8q
nc8q's picture
worth a try!

Good catch.
Looks good to me.
I did not think about an indoor rated device.
I have only been using outdoor rated switches lately.

Good luck and let us know how things turn out,
Chuck
 

AH6LE
I plan on mounting it outside

I plan on mounting it outside since that's where 100 meters would place it.

In a waterproof enclosure of course...

kc8ufv
kc8ufv's picture
I'm presuming there's not an

I'm presuming there's not an option to get power in closer. I'd recommend sourcing 48v POE, with a small POE-powered and passing switch at the midpoint to clean up the Ethernet signalling, and a power stepdown converter at the device. For the same power delivery, losses will be minimized with the higher voltage. You're looking at a run approaching double the limits specified in the Ethernet standards, so special actions such as these need to be taken to ensure reliable ñetwork operation.

AH6LE
You don't think the POE

You don't think the POE Extender will work?

kc8ufv
kc8ufv's picture
I'd be concerned about the

I'd be concerned about the ethernet signalling on that. It indicates it's a passive device. A switch will regenerate the signalling. And there's not really anything you can do to eliminate the losses in the line. It may work, but when you significantly exceed the standard length, the chances of problems goes up significantly. This is an example of the power converter I'd recommend to have right at the radio: https://www.bhphotovideo.com/c/product/1327766-REG/ubiquiti_networks_ins...

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