[details=Seems I was wrong (my original post)][quote=“emil, post:11, topic:7344”]
@Gene, thanks for jumping in to help! We’ve had users attempt this wiring in the past, but due to how @elite1 has his power adaptors plugged in (upright and upside down) we do risk a polarity issue
I was pretty sure that power supplies were fully isolated from live and neutral so connecting one voltage bus (common) should not have presented a problem (and it doesn’t look like it did). If we were to connect a second bus (power) than polarity differences would cause an issue.
Isolators are not much more than a fancy relay, they do not generate power on their output, instead they short their outputs together. In order to work they need to replicate the function of the M terminal. M terminal should supply power to the master valve whenever it is turned on, now it shorts red and white wires of the isolators (otherwise connection is open). Original isolator wiring would short the master valve to common (not much usefulness there), whereas we need to connect it to power rail in order to replicate operation of the M terminal. I originally thought that SP is the power rail (it being associated with Power and all), but discovered that SC is actually a power rail. So to fix the wiring the green wire @elite1 is currently using should go to SC terminal.[/details]
I apologize in advance, I’m used to the switch type isolators, not the type used here. Whereas normally isolators would work like a relay, these work more like a power supply. After going on their website I see that these isolators do indeed output power to the output, not short their outputs together.
I’ll leave the troubleshooting to Rachio team (as I should have done), since I am not sure how the isolators you are using work exactly. Are both output wires isolated or just one? Is commons (white) a passthrough when isolator is energized or is isolation maintained throughout?