I want to replace my old keypad with a wall-mounted tablet. Can I power from the Alarm Panel Pro 12v Terminal?

Powering a wall-mounted tablet with Alarm Panel Pro

You can power it via the AUX power on the Pro if you are powering the Pro using the included 30W power adapter. If PoE powers the Pro, it won't be enough for the tablet.

Also, only power one tablet this way. If you install a 2nd one, use a dedicated power supply.