It's not clear what is your question: are you asking if you can equip (not upgrade!) your HP A5120 48 ports Switch (presuming it is specifically the A5120 EI 48 ports with 2 Slots on the back, model number JE069A) with a module supporting not only hot plugging SFP+ Transceivers but also hot plugging itself or what else?
If you own an HP A5120 EI Switch (24 or 48 ports, doesn't matter) that has 2 Slots on its back (called MOD1 and MOD2), those slots can be equipped with hot pluggable Interface Cards such as:
- JD367A Interface Card with 2 SFP Slots (so for usage with SFP Transceivers and Cables)
- JD368B Interface Card with 2 SFP+ Slots (so for usage with SFP+ Transceivers and Cables)
- JD359B Interface Card with 2 XFP Slots (so for usage with XFP Transceivers and Cables)
- JD361B Interface Card with 1 XFP Slot (so for usage with XFP Transceivers and Cables)
- JD360B Interface Card with 2 10Gb-T (RJ45 Copper) ports (so for usage with Cat.6/Cat.6A 10GbE copper cables)
Refers to updated documentations and QuickSpecs to see if those Interface Cards are - currently - the only ones still supported.