Adam, If you need +48 from a -48V shelf use a DC/DC converter. While grounding the negative side of a DC plant will appear to work the fuses won’t work properly. Ground the 0V of the Eltek and use the -48V to power the equipment (assuming it will take -48). Otherwise use a DC/DC converter. The Meanwell RSD series works well (and the SD series sucks).
Mark > On Oct 26, 2018, at 4:09 PM, SmarterBroadband <[email protected]> wrote: > > Do you leave the Eltek floating and ground everything after the RSDs? Do > you connect the RSD input ground to the Eltek? > > From: AF [mailto:[email protected]] On Behalf Of Gino A. Villarini > Sent: Friday, October 26, 2018 12:30 PM > To: AnimalFarm Microwave Users Group <[email protected]> > Subject: Re: [AFMUG] Eltek "J Series" -48v DC Power Systems > > We use tons of them.. big sites go with a Netonix IDC, smaller sites use 12 > port Netonix + Meanwell RSD DC-DC > > For direct connect we use McCownTech APC/POE injectors > > From: AF <[email protected] <mailto:[email protected]>> on behalf > of SmarterBroadband <[email protected] <mailto:[email protected]>> > Reply-To: AnimalFarm Microwave Users Group <[email protected] > <mailto:[email protected]>> > Date: Friday, October 26, 2018 at 3:14 PM > To: 'AnimalFarm Microwave Users Group' <[email protected] > <mailto:[email protected]>> > Subject: [AFMUG] Eltek "J Series" -48v DC Power Systems > > Thinking of using some of these to make DC sites. Eltek "J Series" -48v DC > Power Systems > > Anyone using these? Care to share how you are wiring things as these are > -48v. > > I plan to power; > > A Netonix switch (would I have to use the special -48v version?) for Cambium > APs > A Mikrotik CCR (see my other email) > Telrad eNodeBs (these are -48) > And a mid span injector to power backhauls. > > Any suggestions, diagrams, help gratefully appreciated? > > Adam > > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
