APPLICATION
The HOCHIKI America SLR-835/-835H can be used in all
areas where photoelectric smoke detectors are required. It is
suited for fires ranging from smoldering to flaming fires.
NS4 Series, NS6 Series, HSC-4R or HSC-(X)R Style bases
may be used with the SLR-835/-835H.
OPERATION
The SLR-835/-835H Photoelectric Smoke Detector utilizes
two bicolored LEDs for indication of status. In a normal
standby condition the LEDs flash green every 3 seconds.
When the detector senses that its sensitivity has drifted
outside the UL listed sensitivity window the LEDs will flash
Red every 3 seconds. When the detector senses smoke
and goes into alarm the status LEDs will latch on Red.
The detector utilizes an infrared LED light source and silicon
photo diode receiving element in the smoke chamber. In a
normal standby condition, the receiving element receives
no light from the pulsing LED light source. In the event of a
fire, smoke enters the detector smoke chamber and light is
reflected from the smoke particles to the receiving element.
The light received is converted into an electronic signal.
Signals are processed and compared to a reference level,
and when two consecutive signals exceeding the reference
level are received within a specified period of time, the time
delay circuit triggers the SCR switch to activate the alarm
signal. The status LEDs light continuously during the alarm
period.
STANDARD FEATURES
• Low Profile - Only 1.8" high (2.2" 835H)
• 2 or 4 wire base compatibility, relay bases available
• 135°F latching heat sensor (835H only)
• Heat sensor protected by a built-in guard (835H only)
• Highly stable operation, RF/Transient protection
• Low standby current
• Two built-in power/sensitivity supervision/alarm LEDs
• Non-directional smoke chamber
• Vandal resistant security locking feature
• Removable smoke labyrinth for cleaning or replacement
• Backwards compatible with Hochiki SLK and SIH detectors
• Automatic Sensitivity window verification function meets
outline requirements in the NFPA 72 Inspection Testing
and Maintenance, Chapter 7
SPECIFICATIONS
Light Source: GaAl AS infrared L.E.D.
Operating Voltage: Nominal: 12 VDC or 24 VDC
Working Voaltage: 8.0-35.0 VDC
Wave Form: Filtered DC 15% Ripple Max
Heat Sensor: 135° F (835H only)
Supervisory Current: 38μA AVG @12 VDC
55μA AVG @24 VDC
70μA AVG @35 VDC
Surge Current: 200μA Max @24 VDC
Alarm Current: 150mA Max
Ambient Temperature: 32° F - 120° F (0°C - 49°C)
Compatibility Identifier: HD-3
Color & Case Material: Bone/White PC/ABS Blend
Sensitivity Test Feature: Automatic Sensitivity
window verification Test
Ordering Codes: White: SLR-835W/SLR-835HW
Bone: SLR-835/SLR-835H
Dimensions: 1.8" (2.2" 835H) H x 3.94" W
Mounting: Refer to NS Conventional
Detector Base Data Sheet