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DS840LSN | Installation Guide | 1.
1.
General Information
The DS840LSN is a microprocessor-based TriTech
Passive Infrared/Microwave Intrusion Detector.
Patented Passive Infrared and Microwave signal
processing provides excellent catch performance with
freedom from false alarms.
The DS840LSN can communicate and connect to all
LSN Bus Systems.
2.
Specifications
Table 1: DS840LSN Specifications
Standby Power
LSN Supply Voltage
LSN Current
Consumption
Alarm Signal
Temperature
Microwave
DS840LSN
Frequency
DS840LSNC
Coverage
Internal Pointability
Cover Tamper
Options
Patents
Compliance
This device complies with Part 15 of the
FCC Rules and with RSS-210 of Industry
and Science Canada. Operation is subject
to the following two conditions:
(1) This device may not cause harmful
interference, and
(2) This device must accept any interference
received, including interference that may
cause undesirable operation.
Changes or modifications not expressly approved by
Bosch Security Systems can void the user's authority to
operate the equipment.
Bosch Security Systems | 9/03 | PRELIMINARY 4998132113Ar11
General Information
No internal standby battery. For each
hour of standby time needed, 4 mAh
are required. For UL Listed
Requirements, four hours (16 mAh)
are required.
33 V maximum
4.0 mA
Alarms are reported to the panel via
the LSN Bus.
-40°C to +49°C (-40°F to +120°F).
For UL Certificated Installations, the
temperature range is 0°C to +49°C
(+32°F to +120°F).
10.525 GHz (UL Listed)
10.588 GHz (UK, France)
12 m x 12 m (40 ft. x 40 ft.)
+2° to –18° Vertical
Tamper signaling via LSN Bus
B335 Low Profile Swivel Mount
Bracket and B338 Ceiling Mount
Bracket. (The use of brackets may
reduce range and increase dead
zone areas.)
These detectors are covered under
one or more of the following U.S.
patents: #4,660,024, #4,764,755,
#5,077,548, #5,208,567,
#5,262,783, #5,450,062 and
#5,670,943.
Other patents pending.
3.
Mounting
3.1
Mounting Considerations
•
Never install the detector in an environment that
causes a constant alarm in one technology; it
should never be left to operate with the LEDs in a
constant flashing green, yellow, or red condition. A
detector with one technology in constant alarm will
cause an alarm output whenever the other
technology alarms. Good installations start with the
LEDs OFF when there is no target motion.
•
Point the unit away from outside traffic (for
example, roads, alleys, and parking lots).
Microwave energy will pass through glass
and most common non-metallic
construction walls.
•
Avoid direct or indirect sunlight.
•
Point the unit away from glass exposed to the
outdoors and objects that may change temperature
rapidly (see Figure 1)
The PIR detector will react to objects
rapidly changing temperature within its
field-of-view.
Figure 1: Avoid extreme temperature change
locations
•
Eliminate interference from nearby outside
sources.
•
Avoid installations where rotating machines (such
as ceiling fans) are normally in operation within
the coverage pattern (see Figure 2).
EN | 2
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