Any powersupply or combination of power supplies can do this if they don’t tie either side to ground. Two 24 volt units in series will work.
From: Jeremy Grip Sent: Tuesday, May 03, 2016 10:46 AM To: af@afmug.com Subject: [AFMUG] basic -48VDC power supply question Anybody know if there’s a reason I can’t take a generic low-end power supply like this: http://www.meanwell.com/webapp/product/search.aspx?prod=nes-350 and tie the DC+ side to ground to supply a -48V that calls for grounding the positive side? Jeremy Grip North Branch Networks,LLC