Alarm Kebakaran
ALN-V PHOTOELECTRIC SMOKE SENSOR - HOCHIKI
The contractor shall furnish and install where indicated
on the plans, photoelectric sensors Hochiki
America Model ALN-V. The combination sensor
head and twist lock base shall be UL listed compatible
with a UL listed fire alarm control panel.
APPLICATION
The Hochiki America ALN-V Photoelectric Smoke Sensor
is particularly suited to detecting optically dense smoke
typical of fires involving materials such as soft furnishings,
plastic, foam or other similar materials which tend to
smolder and produce large visible smoke particles.
Hochiki's unique design allows fast response to flaming
fires as well as smoldering fires while preventing false
alarms.
ENGINEERING SPECIFICATIONS
Operating Voltage 17-41 VDC
Standby Current 450μA
Alarm Current 540μA
Transmission Method DCP - Digital
Communication Protocol
Maximum Humidity 95% RH Non-Condensing
UL Temperature Range 32°F to 115° F
(0° C to 47° C)
Operating Temperature 14°F to 122° F
Range (-10° C to 50° C)
Sensitivity Range 0.7 - 4.0%/FT@300FPM
0.7 - 3.86%/FT@2000FPM
0.7 - 2.65%/FT@4000FPM
Air Velocity Range 0-4000 fpm
Color & Case Material Bone / White - ABS Blend
Weight 3.4oz (5.1 oz. with 4" base)
Bases YBN-NSA-4, HSB-NSA-6,
ASB, SCI-B4 and SCI-B6
The detection chamber consists of a light-emitting diode
(LED) and photodiode arrangement. The chamber is
designed such that light emitted by the LED cannot
normally reach the photo diode. In the event of fire,
particles of smoke enter the chamber and scatter the
light. As the smoke level increases, the scattering effect
increases, causing more light to hit the photodiode. The
chamber contains a unique baffle design which allows
smoke to enter the chamber while preventing external
light from affecting the photodiode. The photodiode input
level is sampled to sense smoke density.
When the smoke density exceeds a preset threshold
the sensor transmits an interrupt to the fire control panel
indicating a fire condition. The fire alarm control panel
can adjust the sensor threshold to compensate for
contamination.
Up to 127 devices are permitted on each SLC loop. A
sensor address is set by a hand-held programming unit.
The sensor mounts to an electronics-free base and
incorporates a locking mechanism for secure installation.
The base provides mounting slots, terminals for field wiring
and a third contact for a remote indicator/LED. The sensor
incorporates dual LEDs for easy viewing of sensor status.
OPERATION
• Low profile - Only 2.00" high, including base
• Simple and reliable device addressing
• Automatic compensation for sensor contamination
• Built-in fire test feature
• Uses the noise-immune Digital Communication
Protocol (DCP), which utilizes interrupts for fast
response to fires
• Two built-in power/alarm LEDs
• Programmble non-polling LEDs
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Removable smoke labyrinth for cleaning or
Replacement