Orion XS as Power Supply

I was wondering how the Orion XS is behaving if set to “Power Supply” mode.
Does it measure the current and adds it to the “DC-System” on the Cerbo Display? Or do i have to run a Smart Shut prior going to the Orion XS?
Can i have multiple Orion XS, and they still add on the “DC-System”?`
Are they controlled via DVCC too (DCL in particular)?