This configuration makes the switch de-energized to trip/alarm, i.e. the high switch normally closed position (energized) will open (de-energize) when a high condition exist and the low switch normally open position will close in the normal operating position (energized) and open on a low condition (de-energized).
William (Bill) L. Mostia, Jr. P.E.
Sr. Consultant
SIS-TECH Solutions
This information is being provide on a Caveat Emptor basis.