[AFMUG] 48v and -48v

[Gilbert T. Gutierrez, Jr.]

I have a site that I am converting to DC from AC. All of the gear powers 
at traditional 48v with a negative ground. I have a PTP800 though that I 
am told is -48v (ground tied to positive). How do I get -48v for the PTP800?

The site has a NewMar DIN-UPS 48-10. It states that the outputs are 
isolated (it has 2) but I do not think they are isolated from each 
other, just from ground. To tell you the truth I am lost. I was thinking 
maybe a DC to DC converter of some sort.

Thank you,

Gilbert