The Murphy MS2100 is a Multi-Purpose Tattletale with dry contacts that can be used to make two circuits and break another when tripped. Operates from 120 VAC or Capacitor Discharge Ignition. The operating coil is intermittent duty and must be disconnected by an external circuit when tripped. This model features a weather resistant case with screw terminals for ease of customer hookup and a manual indicating reset type. The control circuit output contacts are NCH and NOH. Dry contacts normally wired in hot circuit. The latch type is energize to trip.
Tattletale Annunciator indicates which monitored function failed leading to the alarm or shutdown whereas magnetic switches do not. Magnetic switches operate basically as a latching relay. The MS2100 is a replacement for 100PH, 307CD, 307PHCD and 224CD.