Which door access control component is used for checking credentials?

The component used for checking credentials in a door access control system is the credential reader. This device is specifically designed to authenticate individuals by reading their credentials—such as keycards, biometric information, or PINs. When a user presents their credential to the reader, it verifies the information against a database to determine if access should be granted.

Credential readers are critical in ensuring that only authorized individuals can enter a secured area, as they serve as the first line of defense in access control. This functionality is central to maintaining physical security and is an integral part of any access control system designed to protect sensitive locations or assets.

In contrast, control panels are responsible for the overall management and operation of the access control system but do not check credentials themselves; they process the information received from credential readers. Servers store data and manage communication within the system but also do not interact directly with individuals to verify credentials. Alarm transmission devices are designed to send alerts in case of breaches or unauthorized access but are not involved in the credential verification process.