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
Measure resistance between the ground terminal and the positive terminal and
also between the ground terminal and the negative terminal.It should be
very high - on the order of MegaOhms.
It’s not an absolute test as there could be active circuit elements or diodes
between the power and gr
Stupid question - but how exactly do I verify this with a multi-meter?
On Thu, Oct 22, 2020 at 10:32 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
Thanks TJ and Mark!
On Thu, Oct 22, 2020 at 10:32 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
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 wrote:
>
> Slim chance, b
Yes I believe they are isolated inputs, I have ten+ 3930's running on +48v
On Thu, Oct 22, 2020 at 6:51 AM Josh Baird 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
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 +48VD
