Room Smoke Detector with Fire Alarm Siren and Alarm Relay Output, FWD 305

Room smoke detector with fire alarm siren and alarm relay output, power supply 12-24 Vdc.

> Fire Alarm Siren activates with a periodical signal when smoke activates the room smoke detector.

> Relay alarm output activates directly when the room smoke detector sensing smoke (change over contact SPDT; SPNO and SPNC, 1A at 24 Vdc).

> Delay, the relay has 8 seconds delay before the relay activates on the room smoke detector.

> Inter connection via one extra wire. Other room smoke detectors in the system are getting activated with +pole when one room smoke detector sensing smoke.

• Fire alarm siren
• Alarm relay output
• Inter connection with other room smoke detectors
• Test button
• Optical smoke chamber
• Micro processor
• 8 seconds delay before the relay activates

The room smoke detector FWD 305-series is an optical room smoke detector type.
Optical room smoke detector type is also named as photoelectric room smoke detector type. Optical room smoke detectors are more sensitive to fires in the early smouldering stage in comparasion with ionization room smoke detectors.
Ionization room smoke detectors are more sensitive to the flaming stage of fires in comparasion with optical room smoke detectors.