Naim i-Supply details

Evenin' all:

Looking to pick up a used i-Supply i (for ipod) as a backup for my stageline.  I see there are 3 versions:

  s  to power the Naim Stageline phono preamplifier
  h  to power Naim’s high quality headphone amplifier
  i  to power or charge original Firewire-connected iPod models

My question is:  Is the i-Suppply itself the same for all three with the same 24v DIN plug and only the adapter different, or is the hard-wired 24 plug different for all three?  The one I am looking at has the ipod dongle (which I wouldn't use, of course).

Thanks in advance...............