Bartmandude
Member
I am trying to automate a commercial door with iTach relay. It requires a brief connection between terminal R1 & R2 which I will achieve with Close/Open commands to the iTach. The problem is that as soon as I put the wires into the iTach terminal blocks, the door opener is activated - even though the relay is Open. I am at a loss to explain the behavior. The opener is a Liftmaster MH5011L, if I read the schematics right, R1 & R2 are using 24VAC , is it possible the opener is using so much juice that it shorts out the relay?