Yes, the RSD is isolated in such a way that you can ground the + side of
the input (from the -48 rectifier) and also ground the - side of the
output.. nothing bad will happen. The SD series, yeah, don't do that. I
think it was Erich that said he had to disconnect the SD frame ground
because he saw a bunch of current being dumped.
On 8/19/2015 7:28 PM, Ken Hohhof wrote:
Personally, I ground one side of every power supply. In this case,
you would be fine grounding the – OUT of the RSD.
Most DC-DC converters have floating outputs. I have used a Traco TCL
060-124 DC to do what you want. If you are going from 24 to 48, there
are fewer choices.
*From:* Jason McKemie <mailto:j.mcke...@veloxinetbroadband.com>
*Sent:* Wednesday, August 19, 2015 4:11 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] Mixing +48v and -48v
I'll probably just float the ground.
On Wednesday, August 19, 2015, Josh Baird <joshba...@gmail.com
<mailto:joshba...@gmail.com>> wrote:
They are hard to find. Where will you ground the MT in this type
of scenario (with an RSD in between your -48V rectifier and MT)?
Josh
On Tue, Aug 18, 2015 at 11:31 PM, Jason McKemie
<javascript:_e(%7B%7D,'cvml','j.mcke...@veloxinetbroadband.com');>
wrote:
It actually looks like the RSD-100C-24 should do the trick
(I'm dropping to 24v, so I guess my subject line wasn't
exactly correct). My normal source is out of those, according
to their website they have some RSD-200C-48 units though.
On Tue, Aug 18, 2015 at 7:58 PM, George Skorup
<javascript:_e(%7B%7D,'cvml','geo...@cbcast.com');> wrote:
The Mean Well RSD gives 4kV i/o isolation and will work
perfectly this, no grounding issues. I think the smallest
you can get in 48/48 is 200W, the RSD-200C-48. Good luck
finding some.
On 8/18/2015 7:20 PM, Jason McKemie wrote:
I'm wanting to power a mikrotik switch off of a -48v
rectifier setup that already has some -48v equipment
running on it. I'll be using a Meanwell DC/DC
converter, which appears to not bond anything with the
ground. The mikrotik, however, does bond the negative
with ground. Do I need to keep the mikrotik's ground
isolated from the main ground? Or is the DC/DC
converter going to keep things from going boom?
