Looking for a sanity check here. After lots of reading here and elsewhere, I’m hoping to wire a relay to my old doorbell, using that to trigger two contact sensors. Because I want to retain separate triggers for separate doorbell buttons or separate doors, I’m not using the vibration or reed switch mechanisms. I’m hoping this community can double check my parts list or steer me away from this design. This might also serve as a more specific forum post than I’ve been able to find, helping future seekers of ideas.
So, in a resting state, my transformers output screws measure 13.7 volts AC. I’ve read this can fluctuate when the button is pressed. Can anyone confirm? Either way, how’s the Functional Devices RIBU1C? I believe I would wire two of them with the 10-30 vac/dc coil wire to the hot wire from each button and the common coil wire to neutral in the chime box. I’d cap and tape the 120vac coil wire.
On the contact side, I’d wire the N/O pairs to the screw terminals in Ecolink Contact Sensors. Cap and tape the N/C wires.
The sensor will be set to trigger when “closed.” Or reverse if that’s how they work.
For what it’s worth, I’ve attached a shot of the chime box (yeah, I have a very old house).
So, make sense? I’ll post more details and pictures for future reference as I proceed.