Selecting the access control components
There are several components and multiple options to consider when building and designing a security access control system. However, if you keep in mind five basic ingredients, the process is fairly straightforward.
[A] First you need a way for authorized users to identify themselves and/or unlock the door from the secure side (in a free exit system)
[B] Second, you need a way for all users to have free egress from the interior out
[C] Third, you need a locking device to secure the door
[D] Fourth, you need a controller to manage the interaction between entry devices, egress devices and locking devices
[E] Fifth, you need to consider specific requirements for your system (audit tracking, time-based opening or doors, battery backup)
That’s it. That is the basic model, for each point of entry or exit, ask yourself;
[A] How will I get in?
[B] How will I get out?
[C] What locking device will secure the entry point?
[D] How will the system be controlled? and
[E] What other functionality do I need? Applying these questions to each entry point is how the system design process works.
Now, let’s review some of the options related to each of the five questions.