ACA 1N has one, ACA 10N a total of 10 alarm inputs. Both devices can be connected to different signal transmitters. The alarm message can be delayed as required. A siren, horn or an external autodialler can be used for notification. Alarms are acknowledged using a key.
The status of the battery is checked every 24 hours and is indicated by LEDs. All alarm circuits can be read individually and can be switched off independent of other circuits (ACA 10N).