Most of the inputs to the site monitor are ground referenced. In fact one of the connections labeled switch input is actually tied to ground.
If you have any sort of reference to ground tied in to the circuit hooked to the switch input things will likely act oddly. On Apr 27, 2016 3:11 PM, "Scott Vander Dussen" <sc...@velociter.net> wrote: > Enclosure with a door relay switch. When the door is open the relay > switch turns on a light, and trips the site monitor's switch input to send > an alert that the door is open. > > When the circuit is connected as show in the attached PNG the site monitor > always reads the switch input as 1 or connected regardless of the state of > the door switch relay. When we reverse the wires going into the site > monitor switch input everything works perfectly. So when the door relay > switch's C is connected to the right hand side of the switch input and the > NO is connected to the left it works as expected. > > This totally does NOT make sense to me at all :/ > > I thought perhaps the Site Monitor was bridging the switch inputs and the > negative rail of the power source internally. To test that theory I > connected a different power supply directly to the Site Monitor that was > separate from the power supply used for the light and network switch and > also connected to the door relay switch. But even in this state it > performed the exact same. I must be missing something? > > Scott >
