I have also come to the conclusion if deploying anymore -48v radios, each radio will have its own fused DC to DC converter. I really wish Meanwell built a 100 Watt version of the RSD for size purposes and price...
Erich Kaiser North Central Tower er...@northcentraltower.com Office: 630-621-4804 Cell: 630-777-9291 On Wed, Aug 19, 2015 at 9:11 PM, Erich Kaiser <er...@northcentraltower.com> wrote: > Yep... > > > Erich Kaiser > North Central Tower > er...@northcentraltower.com > Office: 630-621-4804 > Cell: 630-777-9291 > > > On Wed, Aug 19, 2015 at 8:01 PM, George Skorup <geo...@cbcast.com> wrote: > >> 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 <j.mcke...@veloxinetbroadband.com> >> *Sent:* Wednesday, August 19, 2015 4:11 PM >> *To:* 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> >> 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? >>>>>> >>>>> >>>>> >>>> >>> >>> >> >> >
