In the sequence of operation for ACS controlled doors, which action does NOT belong?

In the context of Access Control Systems (ACS), the sequence of operation typically involves several key steps that occur in response to user actions. The correct choice indicates an action that is not a standard procedure for the operation of ACS-controlled doors.

When managing access through ACS, the actions usually include authorizing user access, activating the locking mechanism, and logging access events for auditing and security purposes. These steps are integral to ensuring that access control is both secure and accountable.

Selecting the option that involves waiting for guard input is consistent with scenarios where immediate control is required for access; however, this action is generally not part of the automated sequence that ACS is designed to handle. ACS systems streamline access operation through automation, reducing the reliance on manual intervention from guards for authorization or opening doors. Therefore, waiting for external input would interrupt the efficiency and effectiveness of such a system, as access should ideally be granted or denied based on predefined criteria without needing to rely on human oversight in every instance.