cap2N PoE with HP2530-24-PoE switch not working

I have a HP2530-24-PoE that supplues PoE+ (output at switch is 55V).

According to this http://routerboard.com/RBcAP2n it should power up, but does not.

I also tried Ubiquiti INS-8023AF-I 802.3AF Passive PoE to 802.3AF Indoor Adapter but again this does not work.

The only way to get it to work is by using the 24V adapter and injector, this is cluttering up my rack.

What am i doing wrong please, if it supports up to 57V input why is it not turning on with my switch?

As you can see in the page you linked to, “PoE in: Passive”. This means that it will only power from PoE injector. One such injector is included in the box with the cAP unit.

Thanks do you know of any 3rd party adapter that is readily available on Amazon.com would work?

The ubiquiti converters do not work so need oher vendor please.