PS2 isn't 24V. Is DUAL 12V, check the service manual if you don't believe me.
Like this: |+12V|+12V|GND|GND|
Also, I need the DIMENSIONS of PSU, specially the HIGH in mm.
Edit:
Hmm, the very photo you posted says what I'm telling you.
Europe Type
Input: 220V~240VAC @ 0,8A
Output: 12VDC @ 7,2A