Sorry for my ignorance, there is a similar post few days ago but I can't find it. I am trying to find the correct configuration in a bus coupler. Ch4 is wired in a a NC contact (diesel level switch). However the group address that suppose to give the alarm status in the AMX system is supposed to be 100% when there is luck of diesel. Should this configuration work? [URL]http://prntscr.com/8p276[/URL]