Correct. If you get it wrong it doesn’t blow up the RSD, it just doesn’t do anything.
Both the input and output of the RSD are isolated - none of the legs will be tied to ground unless you do it externally. Mark > On Nov 5, 2018, at 5:11 PM, Nate Burke <n...@blastcomm.com> wrote: > > This is my first foray into -48v. > > It looks like the Meanwell RSD-200C-48 is what I need. Input is 33-63vdc. > So on the Input side, the -48 will go to the Negative terminal, and the > ground will go to Positive. Then on the Output side I just wire it normal? > We are not responsible for the radio mount location, so I don't know if they > are tying the Ground back to their cabinet or not. Will there be other > issues with the equipment grounds on the tower after it goes through the > DC-DC Power supply? > > Nate > > On 11/1/2018 10:24 AM, Josh Baird wrote: >> As far as I know, the EdgePoint will smoke if you power it with -48VDC. >> You'll need a DC-DC converter in between your -48VDC plant and the >> EdgePoint. I would recommend Meanwell RSD. >> >> More info: >> https://community.ubnt.com/t5/EdgeSwitch/A-nightmare-with-Edgepoint-S16/td-p/1611552/page/2 >> >> <https://community.ubnt.com/t5/EdgeSwitch/A-nightmare-with-Edgepoint-S16/td-p/1611552/page/2> >> On Thu, Nov 1, 2018 at 11:21 AM Nate Burke < >> <mailto:n...@blastcomm.com>n...@blastcomm.com <mailto:n...@blastcomm.com>> >> wrote: >> I know that +/-48 is oft discussed, but I still can't quite keep track >> of the caveats with different equipment. I need to put an Edgepoint S16 >> at a Telco cabinet, and they will supply me power off of their -48v >> plant. Do I need to do anything special since the Edgepoint does auto >> polarity on the DC Input? I'm guessing that since it's auto polarity, >> the case and ground are isolated from the input lines. >> >> -- >> AF mailing list >> AF@af.afmug.com <mailto:AF@af.afmug.com> >> http://af.afmug.com/mailman/listinfo/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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