I am looking at powering a PoE circuit that drives a 24V motor at 2A. I am considering the LT4275/LT4276 LTPoE++™ Controller. I noticed on the datasheet for the controller LT4275 they recommend an "isolated" DC/DC converter but in the eval board documentation they don't mention "isolated" DC/DC converter.
Is an isolation DC/DC converter just mentioned as best practice? What would happen if you use a non-isolated DC/DC converter?