Bosch DS820 User Manual
Intrusion Alarm Systems | DS820 and DS835 Series TriTech Motion Detectors
DS820 and DS835 Series TriTech Motion
Detectors
www.boschsecurity.com
u Artificial intelligence
u Five detection layers including look down zones
u Five mounting options
u Selectable PIR sensitivity
u Vertical and horizontal pointability
The DS820 and DS835 Series Detectors provide
immunity to false alarms caused by pets. Passive
Infrared and microwave processing provides excellent
catch performance with freedom from false alarms.
Frequency Model
9.9 GHz DS820-B, DS820B-FRA, DS820B-ITA,
DS835-B, DS835B-FRA, DS835B-ITA, DS835C
10.475 GHz DS820CH-SWI, DS835CH-SWI
10.525 GHz DS820, DS820-BEL, DS820-CAN, DS820-NEL,
DS835, DS835-BEL, DS835-CAN, DS820-NEL
10.687 GHz DS820-A, DS835-A
Functions
Signal Processing
Uses passive infrared and microwave technologies to
provide an alarm condition when both fields of
protection are simultaneously activated. Alarm signals
must meet the signaling requirements of both
technologies to activate an alarm. Adjustable PIR and
microwave sensitivity.
Microwave Signal Processing
Pattern recognition circuitry identifies and ignores
repetitive false alarm sources. Adaptive processing
adjusts to background disturbances. This helps to
reduce false alarms while maintaining catch
performance.
Motion Analyzer II Processing
Motion Analyzer II uses multiple thresholds and timing
windows to analyze timing, amplitude, duration, and
polarity of signals to make an alarm decision. It will
not alarm on extreme levels of thermal and
illumination disturbances caused by heaters and air
conditioners, hot and cold drafts, sunlight, lightning,
and moving headlights. Provides three sensitivity
settings.
Test Features
Externally visible alarm LED flashes to indicate a
trouble condition.
Draft and Insect Immunity
The sealed optical chamber provides immunity to
drafts and insects.
0 m
0 m
6 m
3 m
3 m
20 ft
0 ft
0 ft
10 ft
10 ft
0 ft
0 ft
3 ft
0 m
0 m
6 m
1 m
20 ft
0 m
0 m
11 m
5.5 m
5.5 m
35 ft
0 ft
0 ft
17.5 ft
17.5 ft
| DS820 and DS835 Series TriTech Motion Detectors
2
Supervised Microwave and PIR
Patented fully supervised microwave and PIR circuitry
provides single technology coverage in the event the
microwave subsystem fails.
Pet Immunity
The detector is able to distinguish between signals
caused by humans and signals caused by pets [one
dog up to 45 kg (100 lbs.), two dogs up to 27 kg
(60 lbs.), or up to ten cats]. This provides immunity to
false alarms while maintaining proper catch
performance of human targets.
Temperature Compensation
The sensor provides compensation at critical
temperatures.
Certifications and approvals
These detectors are designed to comply with the requirements of:
France AFNOR DS820‑B, DS820B‑FRA, DS835‑B,
DS835B‑FRA: NF, A2P
Europe DS820‑A and DS835‑A comply with EN50131‑1,
Grade 2
Region Certification
Europe CE DS820 and DS835: 1999/5/EC, ETS
300 440: 1996, ETS 300 683: 1997,
EN60950: 1992
Belgium INCERT DS820 and DS835: B-509-0014/c
USA UL DS820, DS835, DS835C: ANSR: Intru-
sion Detection Units (UL639)
FCC DS820 and DS835: ESVDS730
ESVDS730
Italy IMQ DS835B-ITA: U0626
Canada ULC DS820 and DS835: S306-M89
IC DS820 and DS835: 1249102781
Brazil ANATEL DS820 and DS835: 0667-03-1855
Installation/configuration notes
Top View
DS820 Broad Coverage 6 m x 6 m (20 ft x 20 ft)
Side View
DS820 Broad Coverage 6 m x 6 m (20 ft x 20 ft)
Top View
DS835 Broad Coverage 11 m x 11 m (35 ft x 35 ft)
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