What is required to be provided by all readers in case of unit failure?

In electronic access control systems, it is essential for readers to provide a means of bypass in case of a unit failure to ensure continuity of access control. This requirement addresses the need for a manual method to gain entry when the electronic system is down, which can occur due to power outages, equipment malfunctions, or other unforeseen issues.

Having a bypass feature allows authorized personnel to still access secure areas without relying solely on the electronic mechanisms. This is crucial for maintaining security and operational efficiency, especially in emergency situations where immediate access may be necessary.

While having a backup power source is beneficial and could prevent failure, it does not directly address the need for a way to grant access when the system itself is inoperable. An additional manual might provide further instructions but would not facilitate physical entry. A remote control does not offer a practical solution in this context, as it would still depend on the electronic system being operational to function. Thus, the requirement for a means of bypass is fundamental to the integrity and reliability of the access control system.