The Intel® NUC Board 5i7RYB works with 12 or 19V DC. The internal (Auxiliary Power Connector) supports the same voltage. More information in the Technical specifications sheet of the NUC.
24V DC is not supported by the board.
Thank you Mike!
From your link:
Power Supply Connector
The board has the following power supply connector:
• External Power Supply-the board can be powered through a 12-19 V DC connector on the back panel.
The back panel DC connector is compatible with a 5.5 mm/OD (outer diameter) and 2.5 mm/ID (inner diameter) plug, where the inner contact is +12-19 (±10%) VDC and the shell is GND. The maximum current rating is 10A.
It look like I can go as high as 19.5V to 20V on the power supply? I am asking because I need to work with the supplies I have available to me.
Thanks so much for your time and help.