Yes.
From: TJ Trout
Sent: Saturday, September 19, 2020 1:48 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] -48 noob questions (mikrotik)
It's just a simple 48 to 12v converter to feed the mikrotik. I tested with a
ict +48 supply and the 12v comes out fine, I'm 99% sure it will work on the
wood bench, and about 90% sure it will work in a rack.
If it was true -48 I would assume the + terminal would be bonded with chassis
ground?
On Sat, Sep 19, 2020, 12:45 PM TJ Trout <t...@voltbb.com> wrote:
I think some of my devices have the chassis ground bonded with the negative
input terminals, I discovered this
because I am running a telecom rectifier shelf designed for -48 on a +48
system because it's floating, but this
causes the + output to not be fused, so I practiced arc welding once.
Strange, didn't know the 1100 had dc input, but it looks floating though (per
specs -48, 12-57 V)
On Sat, Sep 19, 2020 at 12:40 PM <ch...@wbmfg.com> wrote:
I don’t think I have ever seen a true +48 load.
From: Ken Hohhof
Sent: Saturday, September 19, 2020 1:29 PM
To: 'AnimalFarm Microwave Users Group'
Subject: Re: [AFMUG] -48 noob questions (mikrotik)
Different situation, but I have several sites with 1100ahx4 powered with
+48, even though Mikrotik says they take -48. I suspect you will find the same
to be true on the CCR.
Connect the – terminal to ground and the + terminal to +48, obviously you
don’t want to apply reverse polarity by trying to connect +48 to the -48
terminal.
I have some ccr1009 and ccr1036 but they are all AC powered, and I have no
ccr1072, so I can’t answer your exact question.
From: AF <af-boun...@af.afmug.com> On Behalf Of TJ Trout
Sent: Saturday, September 19, 2020 2:19 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Subject: [AFMUG] -48 noob questions (mikrotik)
So I have a handful of ccr1072's that I want to run on our +48v plant,
mikrotik sells a '-48v telecom' power supply and they insist it's not
compatible with +48v. I ordered one for testing and both +/- input terminals
have no reference to chassis ground. I went ahead and applied +48v and the
power supply fired up (no smoke) and when measuring from chassis ground to the
input terminals I see no difference in potential.
Before I shove this into a $3,000 router I wanted to see what I may be
missing here?
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