I like Bill's explanation the best so far...
-----Original Message-----
From: Bill Prince
Sent: Tuesday, January 05, 2016 11:53 AM
To: af@afmug.com
Subject: Re: [AFMUG] -48v radio on same tower with +48v radio
You need to check both radios to see if they tie the power return to
chassis ground. If either one does, you will need separate power supplies.
If they both are like Dragonwave, and isolate the power return from the
chassis, then you will have a fighting chance with an isolated output
power supply.
bp
<part15sbs{at}gmail{dot}com>
On 1/5/2016 10:47 AM, Craig Baird wrote:
I have a terrible time wrapping my head around -48vdc. I'm hoping you
guys can help. I've got a Cambium PTP820S that I'm going to be
putting on the same tower with several Mimosa B5s. The 820S is
apparently -48vdc, while it appears the Mimosa is +48vdc. I'd like to
power both with a Meanwell AD-155C with a 48v battery string. So...
what are my implications here? Will having both -48 and +48 radios on
the same tower, coming from the same power supply end up shorting
through the tower? What's the best way to do this short of using two
separate power supplies and battery strings?
Thanks!
Craig
