I would not use that PSU , see below.
The following are copied from the PX-716UF user manual.
USB & Firewire interface both *Typical power consumption [B]23w[/B]
Standby [B]500 mA[/B]
CD/DVD Read/Write [B]1.7A[/B]
Peak [B]2.8A[/B]*These parameters were not yet confirmed at the time this manual was published.
Original PSU for the PX-716UF (data taken from the PSU itself)Input: [B]100V[/B]-[B]240V~[/B], [B]0.75A[/B]-[B]0.4A[/B], [B]50Hz[/B]-[B]60Hz[/B]
Output: [B]12V 3.0A[/B]Firmware is the same for the [B]PX-716A[/B], [B]PX-716SA[/B] and [B]PX-716UF[/B]
Original Plextor executable firmware [B]v1.11[/B] size: [B]719 921[/B] bytes.
I do not use Plextools XL anymore as it puts too much load on my Windows XP ripstation (Pentium 4 monocore)