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Help Center24DVDC 4-wire Smoke Detector Fire Alarm Sensor With NO/NC
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24DVDC 4-wire smoke detector fire alarm sensor with NO/NC
PRODUCT INTRODUCTION
This product named Photoelectric smoke
detector(hereinafter called detector) detects the smoke by a
couple of infrared diodes. The principle of detecting is
granule in the smoke can reflect infrared light. Infrared
diodes are placed in the special chamber. The chamber can
shield external light, but doesn't affect the smoke into it.
While there is no smoke, the diode can receive very weak
infrared light. When the smoke entering the chamber,diode
can receive more and more light,and the detector can give
out alarm signal when the smoke attains the certain density.
In order to reduce the interference and lower power
consumption, the emitting circuit adopts the pulse signal.
The product in accordance with the networking approach is
divided into 2- wire and 4-wire detectors.
TECHNICAL SPECIFICATION
PRODUCT CATEGORY 2 wire 4wire
OPERATING VOLTAGE DC9-35V
STANDBY CURRENT
45uA@DC24V
≤200uA(relay N.O.)
@DC24v
≤9mA(relay N.C.)
@DC24v
ALARM CURRENT 40mA@DC24V
45mA(relay N.O.)
9mA(relay N.C.)
ALARM INDICATION RED LED ON
TEMPERATURE RANGE -10℃~+50℃
HUMIDITY 0%~95%RH(NO CONDENSATION)
ALARM OUTPUT Remote LED RELAY OUTPUT
CONTACT RATING N/A 100mA@DC 28V
SENSITIVITY 0.5dB/m(±0.1dB/m)
STANDARD EN54-7/UL268
DIMENSION 100(diaMETER) * 42mm(deep)
Connection Description
1.2 wire smoke detectors :base terminals “1” and“ 2” for DC
power input , non-polarized.“1”for DC power positive pole
or cathode input,“3” for DC power positive pole or cathode
output.“4”for remote indicator cathode. When remote
indicator is used “1” in must be connected to the positive
line in .
2.4 wire smoke detectors : base terminals“ 1” and “2” for
DC power input ,non-polarized .“3” for relay output
com,“4” for relay output N.C. or N.O.
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