Originally Posted by thebland
GARAGE DOOR OPENERS
: Contact Closure? Do garage doors open and close using contact closure when using the wall mounted, wired switch in the garage? I have Genie doors and would like to control them.
Would iRule using the ITACH IP2CC, specifically designed for contact closure switching?
, can the i-Tach be set up to give me feedback to know if the doors are open or closed?
Most garage door openers use a simple contact closure, a door bell button. If yours has two wires going to the button, that's probably the case. If you have some fancy keypad, it may be more sophisticated.
For a two wire button system, just wire the Itach relay in parallel with the manual button. It doesn't matter which wire is which. The Itach is a dry relay.
The Itach shown will work with a contact closure based system. As for feedback, the GC100 has a way of getting feedback through an IR port. I don't know if this Itach can accept a contact closure input?
NOTE: Feedback or door position is possible and cheap to implement!
If you can't directly interface to the opener, you can always mount a magnetic alarm switch on the garage door and jamb and just wire that sensor to an Itach input.
I would call the Itach people and ask how they do contact closure input (sensing) on the newer models. They do have good tech support.
FWEIW, I do my contact closure sensing through a DIY box that sits on the house network. IOW, my own version of the Itach.