I've got 18 zones, and have successfully got a 16 zone Iro up and running on 14 of them, and am just installing an 8 zone Iro for the remaining 4. I'm getting ready to wire up a relay to control the Master Valve and Common lines, and just wanted a quick sanity check; I understand that even if you're an electrician you're not -my- electrician, but I'm hoping some intrepid DIY-er will tell me if I'm doing something stupid.
This is the relay
And here's how I think it should be wired -
The logic here is that if the Iro 1 master valve is powered, the (normally open) Iro 1 Master Valve and Common will be switched on, otherwise the (normally closed) Iro 2 Master Valve and Common will be switched on.
Thanks for any insight you can offer!
Edit -- oops, my labels came out a little small.. Here's what they should show-
Row 1 -- Input from Iro 1 Master Valve and Common
Row 2 -- Input from Iro 2 Master Valve and Common
Row 3 -- Output to Master Valve and Common
Row 4 -- Iro 1 Master Valve and Common (to activate the relay)