Access Control with ADA Buttons using BR-3 Relay Module
This wiring diagram illustrates a typical access control configuration for incorporating an ADA door opener with inside and outside door opener buttons. There are many other methods that can be used to achieve the same results, but there is 1 basic fundamental for any access control system with ADA doors.
The outside door open button must be disabled until valid credentials are accepted by the access control system.
In this example you see that if the inside button is pressed, the BR-3 Module input is triggered. This closes relay 1 which triggers the REX input to the access control system. This in turns unlocks the door and closes the AUX relay. Relay 2 is also closed which triggers the door opener.
The AUX relay prevents the outdoor ADA button from working unless the user presents valid credentials to the access control system. It is important that the door strike time be long enough for a user to present an access card or enter a code and then get to the ADA button.