I have a Aiphone GT-1C system and am trying to see if its possible to trigger the door release feature for my apartments intercom system.
The pinout reads:
IN | OUT | IN | OUT | ----+-----+----+-----+ R R |R R |B B |B B | 1 2 |1 2 |1 2 |1 2 | 23.4v|23.4v| 0v | 0v |
I measured the In and Out for
0v for In and out of
B1/2. When I press the door release button (when its off not being called) all the pins go to 23.4v high. This leads me to believe that they are sending data over wire. I do have an oscilloscope that I could use but I feel like if it got to that point it would be over my head.
I emailed tech support asking if they had a dedicated door release pin and they responded with this:
An option switch dry contact closure can be used when connecting a dedicated strike circuit to the gray and black wires of the 6-pin option cable.
The door release button on the GT-1C triggers the Form C contact built into the back of the speaker module of the entrance. The tenant would need to press the Option button (the icon looks like a laptop monitor) to unlock their own unique door.
I was confused by the response. From what I understand dry contact just means it's volt free meaning its a secondary relay or something. But I don't understand the part about the dedicate strike circuit.