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Advanced Member

Posts: 158

Location: FT. Walton Beach, Florida


Saturday, September 2nd 2006, 10:56am

Although multiple controllers on one system aren't that uncommon in my area, I do not recommend them either. To many complications, variations and etc.. But if you still desire to go this route, this device here will simplify things.
Of coarse the real chalenge is finding a distributor that caries these! Good luck!
Irrigation /Landscape Lighting / Pump and Well Specialist


Supreme Member

Posts: 5,294

Location: Metro NYC


Saturday, September 2nd 2006, 5:20pm

The Isolator webpage describes some of the interconnection problems with two timers. I would just use some homebrew circuitry with parts a Radio Shack would have in their stores, and be just as well off.


Starting Member


Monday, October 10th 2016, 7:14pm

I thought I should post this as I am doing exactly what was mentioned earlier in this thread. Quite simply, isolators are way too complicated and unreliable to accomplish this. This can be accomplished via 24vac relays. Using a separate 24vac transformer, wire the two wires from the transformer to the two normally open relay contacts. wire the other two contacts to the master valve. Then using the master and common terminals of your controller, wire those to the relays, 1 per controller. Your controller is now only activating the relay solenoid. Actual current is coming from the transformer. My system has 17 controllers and the little board I made has 17 relays.



Saturday, December 31st 2016, 6:17pm

second controller voltage feedback

The simplest way I found and cheapest if you can do your own plumbing is to parallel your old master valve with an new addition valve to the new controller to control. Works great and cost less that $25.00. :)

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