As others have said, the base II only supports positive voltages. The voltmeter expansion is semi-isolated so it can measure either.
The new base III will at least be able to measure negative voltages. In addition, it's likely that it will be able to be powered from them. Or more accurately, there will definitely be a version which can be powered from negative voltages. Whether or not the initial, low cost, designed as a drop-in replacement for the existing units version will include the negative to positive power supply needed will depend on whether I can meet my pricing goals while still adding that functionality. To give a bit more insight into what I'm talking about: There are a lot of functions I want to include in the new Base III. But every one adds cost, sometimes substantial cost. So there will be most likely two versions of the new base unit, one which will be lower-cost and drop in for the existing unit, and one which will be "mostly drop in" and which will include things like higher current relays, two isolated voltmeters, etc. On Mon, Jul 15, 2019 at 11:27 AM Jason McKemie < [email protected]> wrote: > Is it okay to have -48v and +24v going into the same site monitor? > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- - Forrest
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