OpenSprinkler › Forums › Comments, Suggestions, Requests › Local Manual Operation › Re: Re: Local Manual Operation June 25, 2014 at 9:59 pm #25906 RayKeymaster As I said previously in this thread: The two wires from 24V AC are connected as follows: one is connected to the COM port, and the other is tied to GND (circuit ground). So I think the ‘other wire’ you are referring to is the GND wire.
