Stupid question - but how exactly do I verify this with a multi-meter? On Thu, Oct 22, 2020 at 10:32 AM Mark Radabaugh <m...@amplex.net> wrote:
> A quick check with the multimeter shows the +/- terminals isolated from > the ground. > > Markings on the supply say 20-60VDC. As long as you get polarity correct > I believe they don’t care where the ground reference is. > > > > Mark > > > On Oct 22, 2020, at 9:50 AM, Josh Baird <joshba...@gmail.com> wrote: > > Slim chance, but does anyone know if I can power a 3930 off of a +48VDC > system? > > The spec sheet says: DC Input: -48, -36, +36, -24, +24 VDC (nominal) > > Does it seem odd that it can accept -/+36 and 24, but not 48? > > An AT&T tech installed a 3930 at one of our sites and wired it directly to > our +48VDC ICT DC system, and it's working, but we don't have any other > equipment (other than a MT) running off of this bus yet. I'm worried that > if we power something that isn't isolated (and expects +48VDC), we may > release some smoke. > > Should I just stick an isolated DC/DC converter in between the Ciena and > our rectifier just to be safe? > -- > 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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