Edwards 2280

Where is the main power, and how do I safely put a 24vdc wall plug on it?

I’m not sure about the terminals (including the AC power ones) since the only site I can find a manual for the 2280 on both looks sketchy & wants you to sign up to view it (which is stupid), but panels like it are powered by 120VAC, not 24VDC: 24VDC is what most panels output to power initiating devices & notification appliances.

I would never try to bootup or run continuously a fire panel from 24V power, it’s only meant for backup.

you can see the correct wiring from this photo, top right.