Direct Current Basic Fire Alarm System Circuit Diagram

This fire alarm systems circuit diagram using direct current (DC) continuity supervision. The circuit uses fire alarm panel which usually known to be single initiating device circuit (IDC). As you can see briefly in the diagram (click to enlarge), this basic fire alarm system circuit design consists of control panel (A), initiating device circuit field wiring (B), small supervisory current flowing through EOL resistor (F) (C), alarm initiating device contact (D),...