Looking into price list there are two Power Adaptors for Aruba Instant On
|R2X20A||Aruba Instant On 12V/30W Power Adaptor|
|R2X21A||Aruba Instant On 48V/36W Power Adaptor|
After checking all datasheet for Aruba Instant On it looks that for all AP first Power Adaptor is suitable.
The question is for what is second one PA?
@Gener1 The R2X21A is only used for the AP11D as it has PoE In and Out. Configuration: Power over Ethernet (PoE) on E0: 802.3af (class 3) or 802.3at (class 4). When using 802.3af, POE-out on E3 is disabled.
The R2X20A is used for AP11, AP12 and AP15.