Frank W. Murphy Tattletale® Annunciators and Magnetic Switch MODEL 518APH

• The nerve centers that translate Swichgage
contact operations into decisions and operate
the alarm or shutdown device.
• They are the electrical load carrying devices for the alarm or shutdown device.
• Tattletale annunciators indicate which monitored function failed leading to the alarm or
shutdown whereas magnetic switches do not.
• Magnetic switches operate basically as a latching relay.