Usage Tips:Wired Smoke Alarm DC12V/24V Networking smoking Detector Switch Fire alarms detectors Sensor Features This product is a non-coded smoke detector with a pair of switch output contacts, which can be normally open or normally closed according to actual needs. During normal operation, the indicator light flashes once every 8 seconds: when an alarm occurs, the indicator light is always on, and the alarm output contact operates at the same time. Power-off reset/automatic reset optional Common reporting output NC/NO optional 9/35V non-polar wide voltage input (AC, DC) Network output/LED indication alarm/Buzzer sounding alarm SMT process manufacturing, strong stability Low quiescent current to save power Dust-proof, insect-proof. Anti-white light interference design Metal shield, anti-RF interference (20V/m IGiiz) Technical Parameters Standby current: 16mA (relay normally closed), 3mA (relay normally open) Alarm current: 8mA (relay normally closed), 19mA (relay normally open) Alarm indication: red LED is always on Sensor: Infrared photoelectric sensor Working temperature: -10 C~+50 C Ambient temperature: maximum 95%RH (no condensation) Anti RF interference: 10MHz1GHz 20V/m Alarm output: normally open/normally closed optional, contact capacity DC28V100mA Reset mode: automatic reset/power-off reset optional Coverage area: when the space height is 6m-12m, the protection area of one detector is 80 square meters for general protection sites: when the space height is below 6m, the protection area is 60 square meters. The specific parameters should be subject to the design specification GB50116-98 of automatic fire alarm system. Execution standard: GB47162005, EN547 Sensitivity: 0. 5db/m (0. ldb/m)