I've got the DaynaPORT Pocket SCSI/Link & manual if that'd be any help. Mine's for the PowerBooks, but it has a 25 pin connector as well. It runs off ADB power, so I can't help you with the AC Adapter Spec. any more than that. I'd be surprised if it were much different though.

I can buzz the cable and tell you the shell/pin polarity, but you're far better off checking for the Power/Ground polarity of your connector on the Logic Board.

Is Dayna still in business?