PTP poe IEEE 802.3at-2009

Good morning, I have a problem regarding the use of the original Cambium PTP 550 power supply.
I have a 48V power supply in my structure and the PTP 550 in the original power supply uses 56V. Does it work with a voltage other than 56V? If so, at what voltage? For example, microcomputer equipment generally goes from 8V to 50V. Does the PTP550 also work this way?
Another question, in the original power supply description it says that it uses PIN 4.5 +56V, PIN 7.8 return. If I connect a different standard, does it just ignore the voltage or is there a risk of burning it?