What type of event would typically trigger an alarm in an access control system?

An unauthorized access attempt would typically trigger an alarm in an access control system because these systems are specifically designed to monitor and control who has access to certain areas. The primary function of an access control system is to prevent unauthorized individuals from gaining entry, and any attempts to bypass security measures, such as using invalid credentials or trying to access restricted areas without proper authorization, would be flagged as a security threat. This activation serves to alert security personnel and initiate appropriate responses to prevent potential breaches.

Scheduled maintenance, routine manual checks, and system power recovery, while important for the upkeep and functionality of the system, do not indicate security threats or breaches. They are regular operational activities that do not necessitate triggering alarms since they are anticipated and controlled processes within the system's management routines.