I wonder if you can run two in parallel?
On Fri, May 16, 2014 at 6:33 PM, Michael K Johnson via EV <[email protected] > wrote: > Found an ebay listing for WRB4812S which has 36-72V input and 12V > output. Bought it. Then re-read and found that it's a 1W part and the > meter is listed at 2W. Oops. Guess I'll measure what it actually > draws; I assume that's for the relays that I don't even want to drive. > Maybe I can configure the setpoints so that it doesn't draw power for > the relays and it lives on 1W... > > On Thu, May 15, 2014 at 8:59 PM, Michael K Johnson <[email protected]> > wrote: > > Well, my system floats from the frame, but lightobject responded: > > > > : The power of the JLD404 is isolated and the ground of the > > : power negative has no common to the Input ground. You do > > : NOT want to common ground the power and the INPUT ground. > > : Otherwise, the amp meter won't work and that is the pretty of the > > : JLD404 with isolated Ground > > > > So I guess it's off to ebay for an isolating power supply. I haven't > > seen one yet that can handle 48V and output 12V, so it looks like > > I'll have to put it downstream from my buck converter. > > > > On Thu, May 15, 2014 at 1:34 PM, Rick Beebe <[email protected]> wrote: > >> Jack's concern was that the meter might make a connection between frame > >> ground and the high voltage pack so he put the DC-DC in for isolation. I > >> did have that problem on the analog volt meter I used to have in the > >> truck so I put one in as well. However I don't have any evidence to > >> suggest it's really necessary for this meter. I haven't found any > >> continuity between the 12v power and high voltage connections on the > >> meter. But the DC-DC was only a couple bucks so it was cheap insurance. > >> > >> --Rick > >> > >> On 05/14/2014 08:17 PM, Michael K Johnson wrote: > >>> Thank you! That's perfect! All you are really doing is programming > >>> mV/A with a max of 75mV, so that makes sense. > >>> > >>> The EVTV diagram says "Isolated 12v to 12v DC-DC Converter". I didn't > >>> see anywhere else that the negative power terminal on the JLD404AH > >>> cannot be tied to the COM terminal. And all my 12V regulated supplies > >>> are common negative. I don't have a separate 12V house battery in the > >>> lawn tractor. Are you using an isolated dc-dc converter in your truck? > >>> > >>> > >>> On Wed, May 14, 2014 at 9:10 AM, Rick Beebe via EV <[email protected]> > wrote: > >>>> I have one in my truck and it works great. It wants a 75mV shunt but I > >>>> have a 50mV/500A. You just lie the meter--I.e. I said it was connected > >>>> to a 75mV/750A shunt. > >>>> > >>>> The manual is available here: > >>>> http://www.lightobject.info/viewtopic.php?f=14&t=1074 > >>>> > >>>> Jack Rickard of EVTV has written a plain english one here: > >>>> http://media3.evtv.me/JLD404AH.pdf. > >>>> > >>>> --Rick > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." To invent, you need a good imagination and a pile of junk. Thomas A. Edison<http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140516/2f8d6068/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
