Can i use ubiquiti standard 24V 1A power suply directly to PTP450b - no invertions in RJ45? Some radios has rectifier in power input to prevent damage and work with polarity inverted(802.3af units mostly use these schema in power supply) but 30V Cambium radios i dont know if use it.
The PMP450b IS polarity agnostic and will accept either a Cambium PSU or an UBNT PSU.
The PTP450 however is not polarity agnostic. You would need to swap the blue and brown pairs if you want to use a UBNT PSU.
Blue <=> Brown
Blue/White <=> Brown/White
I hope that helps.