Multiple Rachio Controllers with Shared Command and Master Valve

[Gene]

@Simonite does not have a master valve, unlike the configuration within this topic, so there is no need for a relay in his case.

@janderson the reason why you can’t run both controllers at the same time with your setup is that you are physically isolating the commons. This is not strictly needed as long as only commons are shared.
This has been proven in another topic

2nd Gen sharing a pump start relay with a Hunter Controller?

Okay guys, I am about to wire up the DPDT relay and want to make sure I am clear on the wiring. Here is a picture of my pump start relay wiring and Gene’s schematic with the wires from the pump start wiring image. [image] [image] Do I have it right? Thanks, Kevin

You can get both your controllers running at the same time by joining commons from your relay’s terminals 3,6 and 9. This should work as long as the original AC power supplies are used.