Isolate On Apr 28, 2016 1:27 PM, "Forrest Christian (List Account)" < li...@packetflux.com> wrote:
> 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 >> >
