I did continuity testing on a Meanwell SD series that I have sitting around - the inputs, outputs, and ground all seem to be isolated. Is this a good indicator?
On Wednesday, August 19, 2015, Ken Hohhof <af...@kwisp.com> 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 > <javascript:_e(%7B%7D,'cvml','j.mcke...@veloxinetbroadband.com');> > *Sent:* Wednesday, August 19, 2015 4:11 PM > *To:* af@afmug.com <javascript:_e(%7B%7D,'cvml','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 > <javascript:_e(%7B%7D,'cvml','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? >>>>> >>>> >>>> >>> >> >> >
