I can confirm as well the Ciena power supplies are isolated I have used
the same ones on +24 and -48v. I have many of these installed.
On 10/22/2020 9:31 AM, Mark Radabaugh 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
<mailto: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?
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