ADC Smart Chime

Can we use the ADC Smart Chime to make alarm announcements? Such as Door open or is it just for the doorbell?

Smart Chime is for doorbell cameras only, it does not duplicate panel sounds/sirens. More information on the Smart Chime can be found here:

If you are looking to have an external device that relays panel announcements you would need a secondary panel. If you are looking for an external speaker for sirens, you would need either a Wired/Wireless Siren or a secondary panel.