I bought a more power PSU ( 24V, 2.5 A ), but problem not solved. Cable 15 m maximum. I think that protection by current (500ma) in the device on hEX S works. To power the HAP AC2 I had to use POE RBGPOE + Hex S ( from single PSU 24V, 2.5 A ) - all work fine. Why then the support POE is made on hEX S?