Yes you can put an isolated 48v dc to DC supply to isolate -48 from +48 (a meanwell brand would work) needs to be an isolated converter
Also fyi that most of the '-48' equipment I've tested hasn't had a chassis reference to either of the DC input terminals, so thus far I've ran as +48 on everything. 48v is 48v, difference between -48 and +48 being which output terminal may be bounded to chassis ground. On Fri, Jul 2, 2021, 9:33 AM castarritt <castarr...@gmail.com> wrote: > Tushar wants me to figure out a good solution for our first site to be > converted to DC power. > > APs I want to power through a rack injector are: > 3x 450M 5Ghz > 2x 450i 5Ghz > 3x 450 5Ghz > 5x ePMP force200 for ptp customers > > The force200s don't use sync, but I would like all the others to have sync > over power. > > Currently we have an ICT-IP-BMMD -48v shelf and one of their isolated 48v > to 24v converters. > > Router is an MT CCR converted to -48v with their DC power supplies. > Switch is a CRS that will be wired to run off the ICT +24v converter. We > also have 6x dwave backhauls that will all be fine with -48v. > > Problem is, without a +48v source, I can't figure out a way to power all > 13 radios through a single rack injector without giving up sync via power > on the 450i APs. Is there an easy way to get +48v off of either the -48v > or +24v ICT supplies, or should I just plan on adding a second rack > injector? > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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