Why would you use a UBNT instant 802.3af adapter in that way?
That is
NOT what it was designed for and you can damage it and the switch.
The 802.3.af adapter is meant to plug into an 802.3af ACTIVE POE switch not a PASSIVE POE switch and produce 24V POE out for airMAX radios.
If you want 24V POE simply just log into the switch and set a port to 24V POE.
You can even power standard 10/100 24V (2 pair pins 4,5,7,8) UBNT devices with the 24VH option on port 2 which is 24VH or 48VH only as 24VH works FINE with UBNT 24V devices. Having power on the other 2 pairs will NOT hurt anything as it just get to the Ethernet Transformer on the device on the other pairs and goes nowhere but using that adapter vary well could have damaged the adapter and the switch.
What are you trying to gain by doing such a thing???
Using that adapter with out switches is just WRONG!!!!
UBNT instant 802.3af adapters sole purpose in life:1) Communicate with ACTIVE POE switch to tell it to turn POE ON on for the port that the adapter plugged into
2) Convert the 48V provided from the ACTIVE POE 802.3af switch (only from pair 3 and 4) to 24V (only on pair 3 and 4)
WHY ON EARTH WOULD YOU WANT TO TRY THAT ON A SWITCH THAT IS ALREADY CAPABLE OF PASSIVE 24V BY SIMPLY TELLING IT TO TURN 24V POE ON FOR ANY PORT THAT YOU WANT 24V PASSIVE POE???????????