DS940/DS940T
Passive Infrared Detector
Installation Instructions
1.0 Description
The DS940 is a high performance Passive Infrared (PIR) Motion Sensor which uses advanced signal processing to provide outstanding
catch performance and unsurpassed false alarm immunity. It is designed to detect movement in the interior of a structure by sensing the
Infrared energy emitted from the human body as it moves across the sensor’s field of view. When motion is detected the unit sends an alarm
signal to the control panel.
2.0 Specifications
• Input Power: 9-15 volts DC
• Current Draw: 17 mA @ 12 VDC (standby and maximum)
• Standby Power: No internal standby battery. For UL Listed Prod-
uct Installations, 4 hours (68 mAh) standby
power must be provided by the control unit or
by a Listed burglary power supply.
• Relay Form “A” Normally Closed (NC) contact set
rated for 125 mA@ 28 volts maximum DC, 18
volts maximum AC for resistive loads.
• Tamper: (DS940T only) Normally Closed (with cover on).
Contacts rated at 28 VDC, 125 mA max. Con-
nect tamper circuit to a 24hr. protection circuit.
• Temperature: -20° to +120°F (-29° to +49°C).
For UL Listed installations, the temperature
range is +32°F to +120°F (0°C to +49°C).
• Humidity: 0 - 85% non-condensing.
• Dimensions: 3 in. x 2.25 in. x 1.5 in. (HxWxD)
(7.6 cm x 5.7 cm x 3.8 cm)
• Options: B335 Swivel Mounting Bracket. Use of this
bracket may decrease the PIR range and in-
crease dead zones.
• Reading Bosch Security Systems, Inc. Product Date Codes
For Product Date Code information, refer to the Bosch Security
Systems, Inc. Web site at: http://www.boschsecurity.com/
datecodes/
.
3.0 Installation
3.1 Remove the cover using a
small flat-blade screwdriver.
3.2 Press the vertical adjust
tab toward the side of the
case and lift out the board.
3.3.
3.3.
3.4 Avoid.
3.3 Select a mounting location.
Mount the sensor where an
intruder will most likely cross
through the coverage pattern.
Bottom of Detector
Insert screwdriver here or here
LED
ON
7.5-9ft
3.3.
3.3.
3.5 Position the detector at the correct height.
7.5 - 9 ft.
(2.25 - 2.7 m)
Mount the detector 7.5 - 9 feet
(2.25 - 2.7 meters) above the floor
Moving Objects
Pets
Heat
Sources
Windows
and
Uninsulated
Walls
Air
Conditioning
Outlets
Direct Hot or
Cold
Drafts
Mounting
Outdoors
Direct Sunlight
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