Don't Overwrite The Bagel
I've seen too many ribbons blown up when someone starts patchbay swapping with +48v running. Happened to an RCA 77 on a session I was playing on. The control room got real quiet and the house engineer walked over the assistant and asked to "see him outside for a moment". They never returned.Only if you remove the 48V at source. Or you could fit some isolating capacitors. However, ribbon mics are perfectly safe on phantom power...IF you had a really old mic worth a 5 figure sum you might avoid spook juice but even designs as old as the Coles (orig STC) 4038 are regularly connected to phantom lines at the BBC, millyons of times, for years!
I will draw you something up the morrow.