Standardized logic (like ISA-18.1-1979) defines how the light flashes and how the buzzer behaves.
Can range from small, 8-window units to large, networked systems with 48+ windows or digital screens. 4. Common Applications annunciator
Displaying which zone or detector has triggered a fire alarm. Standardized logic (like ISA-18
Annunciators monitor field sensors (switches) that detect changes such as high temperature, low pressure, or loss of flow. 8-window units to large