Alarm state - For analog fire initiating circuits; Smoke Detectors, Heat Detectors, Water Flow, Pull Stations and similar circuits. For tamper monitory of valves the FACP should provide a Supervisory signal only. Supervisory signals should self restore once the circuit returns to a normal state
A line break or disconnect should cause a trouble condition which requires acknowledgement and correction before manually resetting the system.
This figure shows a typical analog fire circuit containing 3 devices. These devices can be any of the devices stated in figure 2. Smokes must be 2 wire type.