I still cant comprehend any of this. I'm just dumb when it comes to it On Sat, Sep 19, 2020, 2:51 PM <ch...@wbmfg.com> wrote:
> 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? >>> ------------------------------ >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> ------------------------------ > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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