The door controller manages the devices present in each access: reader, electric lock, exit pushbutton, door sensor, and so on. When installed in the secure zone (interior), it allows you to increase the security of installation access. The device that powers the electric lock is beyond manipulation. The door controller accepts Wiegand-26 bits or magstrip readers and accepts a reader for the entrance and another for the exit.

They are the hubs that connect software, readers, and locks in physical access control systems. They are a complex component that connects everything else. Door controllers assist in preventing members of the public from entering restricted areas where they do not belong.