I have an AXIS 1610 door controller, and I am connecting it to the SBC (Single Button Control) to the Liftmaster control board. I am able to enter a PIN CODE on my entry intercom which tells my Axis 1610 the credential is good, and it sends a pulse and opens the gate.

HOWEVER, I am not able to send a second pulse to the Liftmaster to tell it to close the gate,

I cannot use the timer on the LU400, and I need to find a way to allow a second pulse to be sent to the LU400 to tell it to close.

ANY ideas?

 

Why can't the timer be used?
What about an exit sensor.