92
en | Device Specifications and Overview
Easy Series
F01U087835 | 02 | 2008.10
System Reference Guide
Bosch Security Systems, Inc.
10.17
wLSN Smoke and Heat Detectors
The ISW-BSM1-SX (868 MHz) is a wireless smoke detector.
The ISW-BSM1-SY (915 MHz) is a wireless smoke and heat detector that provides fixed
temperature and rate-of-rise sensors.
Under normal conditions, the red LED flashes once every 8 sec while the sensor monitors the
surrounding environment. When the sensor detects smoke, the LED changes from flashing to
steady on and the sounder produces a loud continuous tone.
A self-diagnostic feature monitors detector sensitivity and operational status.
A cover tamper switch transmits a tamper signal when the cover is removed from its base, or
when the unit is pulled away from the wall.
The optical chamber is removable for easy maintenance.
Specifications
Battery Replacement
The LED normally flashes every 8 sec. Replace batteries when the LED stops flashing and the
sensor chirps every 45 sec.
The low battery trouble chirps can be silenced for 24 hours by pushing the Test/Silence
Button. Refer to
Figure 10.7
on Page 92 for the location of the Test/Silence Button.
Figure 10.7
wLSN Smoke Detector
868 MHz
ISW-BSM1-SX
915 MHz
ISW-BSM1-SY
Power/Voltage
Two lithium batteries; 3 VDC
Fixed Temperature Sensor (ISW-
BSM1-SY)
+57°C ± 3°C (+135°F ± 5°F)
Raye-of-Rise Sensor (ISW-BSM1-
SY)
+8.3°C/min>+41°C (+15°F>+105°F)
Photoelectric Beam Obscuration
Sensitivity
0.14 ± 0.04 dB/m
Drift Compensation Adjustment
1.64%/m (0.5%/ft) maximum
Average Alarm Current
70 mA
Sounder
85 dBA at 3 m
Self-diagnostics Feature
Monitors detector sensitivity and operational status.
EN14604
ISW-BSM1-SX
1
High intensity LED
2
Test/Silence Button
