INJECTOR Single Port PSE Controller, with DC/DC Converter NOT Isolated

Hi, i have design an Injector with LTC4279.

The Main Supply is Isolated From Netz with normal and regular Toroidal Transformer.

While the secondary DC/DC converter for have the 55 V Out for Injector Type1, Type2, LTPoE++...., isn't isolated, it's a normal Boost converter with choke.

It can be a proper PoE installation ???                  (Attach the drawing)

Injector PSE Controller With dc-dc Not Isolated.PDF

DC2541A2-SCH.PDF

Thank you