Diode usage

Are you saying that it will sometimes trigger the door with only *one* wire attached from the relay? If so, that relay contact is not isolated with respect to the door opener. You really need a relay that has truly isolated contacts. Then, it should work, but you'll need to connect both leads to the relay.

Bob

I assume you need to press just one button? If so: A diode may work for you - I suspect not. While it could keep your controller happy, it may at teh same time prevent it from operating the opener. Instead, use a relay. That will work for you. Your controller operates the relay, and is totally isolated from the opener. The points on the relay are wired to the opener's button.

Of course, if the opener requires more than one key to be pressed, the above won't work - you'll need one relay for each key to be pressed, and the ability to operate them in the correct sequence.

Ed

The automation controller has its own relay, but I assume it's an electronic version of a relay. What you are saying makes sense! I'll put a mechanical relay behind the automation controllers relay and that will prohibit any power from reaching the automation controller reguardless of what the automation controller has.

Thanks guys!!

Jon