Listed on the left-hand side, these include initiating devices such as: Smoke and heat detectors Manual call points (break-glass units) Sprinkler flow and pressure switches Gas suppression system triggers Effects (Outputs):
In the old days, fire alarm systems were "Conventional." If a wire touched ground or a bell was pulled, everything happened. Every siren wailed, every door closed, and every elevator grounded. It was a panic button. fire alarm cause and effect matrix