A fire alarm system has a number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are present. These alarms may be activated automatically from smoke detectors, and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns.

There are two types of panels – Conventional & Addressable. Conventional panels are suitable for small applications like Office, Godown, Store or Small Projects & Addressable panels are suitable for Factories, Industries, Control Rooms, Airport etc. Smoke detectors in a zone (or area) of the building are all connected to the same pair of wires. If any of these detectors report alarm, a single indication is shown on the control panel, means that the exact location of the alarm is not shown but zone area will be indicated on panel.