Originally Posted by dmfa200
I'm not sure if anyone has covered this but I bought a Johnson Controls System 450 for my fermentation fridge.
Even though it was a two stage I figured I could use one of the relays and use it for two stage control.
It dawned on me that if I just snapped off the connecting tab on my 110v outlet to isolate each receptacle I could use it for two stage control.
Is anyone doing this?
I'm confused. A single stage controller only has one relay, and can not be converted to two stage use. You can control any number of different things with a single stage controller, switching between functions as needed, but can not simultaneously control two different outputs at the same time (which is what dual stage means). The Johnson control system 450 is neither a single stage or dual stage unit, and in fact has up to 10 outputs.