Bosch 8-Dec - Manual (Page 318)

310 | LSN Peripherals | LSN Motion PIR/Microwave
DS 935 LSN Infrared
Motion Detector
Features
▶ Wide-angle version (standard) up to 11 m
▶ Long-range version (optional) up to 21 m
▶ Remote-controlled alarm/walk test display
▶ Tamper contact
▶ Programming of the detector is carried out by
configuration software in the corresponding LSN
control panel.
▶ Alarm, tampering and faults are evaluated via the LSN
bus
▶ 2-wire connection to LSN
The DS 935 LSN infrared motion detector is used to monitor
rooms for unauthorized entry.
PIR detector 11 m wide-angle version. 21 m long-range
version with long-range mirror (optional).
Functions
The detector uses the temperature of surrounding surfaces,
such as floors and walls, as the standby value. High
temperature fluctuations on the reference surfaces should
be avoided.
Sensitivity is programmed using the LSN control panel.
Standard:
- Protection against false alarm
- Higher tolerance to environmental conditions
- Not suitable for the long-range version
High sensitivity:
- Protection against intruders
- With normal environmental conditions
- Higher response sensitivity
Note The detector is not equipped with an alarm log
display. Due to the individual detector
identification by the LSN control panel, this is
no longer necessary.
Certifications and Approvals
Region Certification
Europe CE DS 935 LSN
Germany VdS G 101552, B DS 935 LSN (W)
G 101553, B DS 935 LSN (V)
Installation/Configuration Notes
DS 935 LSN detectors do not mutually influence each other.
The detection zones may overlap.
Fixed objects represent surfaces that reduce the detection
zone.
Outside the monitoring area, ceilings and walls should be
mechanically stable.
In order to ensure the intrusion security of ceilings that are
not mechanically stable, detectors should monitor each
other.
Moving objects within the detection zone are not permitted.
If placed above a heating radiator, a minimum distance of
1.5 m to the radiator is necessary.
Heat sources and cold air currents within the detection
zone lead to faults.
Installation
Shielded installation cable must be used to connect the
detector.
The detector reacts best to movement at right angles to the
detection zones.
The installation bracket B338 (optional) can be used to
swivel the detector around by +/-45° and to tilt it by
+7°/-16°.
In interior areas, the detector can be installed 2 m to 2.6 m
above floor-level on vertical, stable surfaces.
Wide-angle version
•
Use of several detectors, also with overlapping
detection zones
•
Monitoring area 11 m x 11 m
•
Vertical swivel range of the mirror:
+2° to -16°
Bosch Security Systems B.V. www.boschsecurity.com
6