Bosch DS937 Installation Manual
Installation Guide for DS937
Ceiling Mounted, Passive Infrared (PIR)
Intrusion Detectors
1.0 Description
The DS937 is a low-profile, ceiling-mount Passive Infrared Intrusion detector that provides a 360° coverage pattern. The low profile design provides a recessed-mount look, even when surface mounted. It is easy to install with access to wiring and programming options available without removing the detector from the ceiling. With a 50 ft. (14 m) diameter coverage pattern, it is an ideal choice for applications that require ceiling mounting and spot or 360° detection.
2.0 Specifications
•Input Power: 9 to 30 VDC; 7.5 to 24 VAC.
•Current Draw: 17 mA maximum at 12 VDC.
•Standby Current: Intended for connection to DC power
supplies capable of supplying power if primary power fails.
• Coverage: |
50 detection zones. |
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Mounting Height |
Detection Area |
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Maximum Diameter |
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8 ft. (2.4 m) |
38 ft. (11.6 m) |
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10 ft. (3.0 m) |
46 ft. (14.0 m) |
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12 ft. (3.7 m) |
50 ft. (15.2 m) |
•Detectable Speed: 0.5 to 15 ft./s (0.2 to 5.0 m/s)
•Alarm Contacts: NC (Normally Closed) dry contacts, rated
500 mA, 10 W max. @ 30 VDC.
•Tamper Switch: NC Integral, Cover-Activated
•Sensitivity Selection: Field selectable for 1, 2, 3, or 4 pulse
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counts. |
• Storage and |
+14°F to +122°F (-10°C to +50°C). |
Operating |
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Temperature: |
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•Humidity: 0 to 95% non-condensing
•Dimensions: 5 inches diameter by 1.5 inches high
(125 mm diameter x 38 mm high)
3.0 Avoid: |
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Air Conditioning |
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Direct Hot or |
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Outlets |
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Mounting |
Cold Drafts |
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Pets and |
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Outdoors |
Small Animals |
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Windows and |
Water or |
Direct Exposure |
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Oil Vapor |
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to Sunlight |
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Moving |
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Uninsulated Walls |
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Objects |
Heat Sources |
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4.0Mounting
4.1Use the mounting template to position and drill the wiring hole and starter holes for the two mounting screws provided with the detector.
4.2 Install the provided mounting screws leaving enough space between the screwhead and the mounting surface to allow placement of the detector base.
4.3 Mount the detector base |
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4.4 Connect wires to the |
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1. |
Remove the Outer Cover Ring (may be pried |
4. Slide the detector over the mounting |
Terminal Block by passing |
loose with a small flatbladed screwdriver). |
screws. |
them through the Wiring |
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2. |
Loosen the cover screw. |
5. Rotate the detector clockwise until the slots |
Passage. |
3. |
Turn the cover dome counterclockwise and lift |
firmly engage the mounting screws. |
Power Input |
it off the detector. |
6. Tighten the mounting screws. |
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3. Rotate Cover |
(nonpolar) |
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Alarm Output |
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to unlock |
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(Normally Closed) |
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Alarm Memory |
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First To Latch |
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Tamper Switch |
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(Normally Closed) |
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1. Pry here if |
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Only apply power |
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necessary |
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after all connections |
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2. Loosen |
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have been made and |
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inspected. |
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Cover Screw |
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Mounting Holes |
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4.5 Wire as shown to use the Alarm Memory and First To Latch functions.
DC 12V
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SW |
F.T.L. A.M |
F.T.L. A.M |
A |
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DS937 DS937
Control Panel
Alarm Memory only:
•Wiring of First To Latch is not needed.
•Run a single wire from the AM terminal to switch A and then to +12 VDC.
•Switch A should stay in the closed position for normal operation.
•When alarm history is needed, open switch A. The LED of the DS937 with alarm history will flash.
Notes:
1.If there is no alarm history, the DS937 operates the same as normal when switch A is opened.
2.If switch A is closed after being opened, the alarm memory will be cleared after one second.
Alarm Memory in Conjunction with First To Latch:
•First To Latch identifies the first DS937 to alarm.
•Procedure is the same as Alarm Memory function.
•When alarm history is checked, the DS937 that alarmed first will have a flashing LED.
4.6 Set the LED On/Off Select Switch.
During the warm-up
period, the LED flashes for about 30 seconds and the relay is kept in
alarm condition.
If you don’t want the alarm LED to light, it can be turned off with this switch.
If the LED On/Off Select Switch is in Off mode, the LED will indicate an alarm history when using Alarm Memory only or when using Alarm Memory in conjunction with First To Latch.
If the LED On/Off Select Switch is in On mode, the LED will not operate in normal conditions when using the Alarm Memory and First To Latch functions.
4.7 Set the Sensitivity Switch. Pulse Count:
4 pulse counts is the recommended setting for locations where an intruder is expected to cover a sizable portion of the protection area. The detector tolerates harsh environments at this setting.
3 pulse counts is for locations where normal environmental transients are expected.
2 pulse counts is the normal setting for areas where thermal and illumination transients are minimal.
1 pulse count is for fast response to intruder signals. It is for use in quiet environments where thermal and illumination transients are not anticipated.
Detection Range Adjustment:
The Detection Range Adjustment may also be used to fine tune the sensitivity of the detector. Adjust the control for the lowest setting that provides good catch performance.
L |
Detection
Range
Adjustment
4.8 Mask unwanted detection zones (see 6.0 Coverage Patterns) by lifting the Lens Lock, rotating and removing the Fresnel Lens, and covering the
unwanted lens areas with the masking sticker.
Rotate Fresnel
Lens to remove
Clean the Fresnel Lens with a soft, clean, damp
cloth. Make sure there is no Lens Lock 
dirt or fingerprints on the 
lens.
4.9 Reassemble the detector.
1. Align Ridges
2. Push Cover on
3. Rotate Cover to lock
Rotate
4. Tighten Cover Screw
5. Align Outer Cover Ring with Detector and press until it locks in place.
Align with Ridges
Align with Cover Screw
Align Notches
5.0 Walk Test the detector. Wait until the LED stops flashing after applying power to the detector to start walk tests. Observe the Alarm LED while walking across the coverage area. It will light as you enter the coverage area. Walk test from both directions to determine the exact boundaries. Adjust the detector and continue walk testing until the desired coverage pattern has been obtained.
NOTE: Walk testing should be done across the coverage pattern.
6.0 |
Coverage |
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3 |
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0 Meters |
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7 |
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Patterns |
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130° |
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1023 |
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90° |
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23 3 |
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0 Feet |
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4.5 |
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A |
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30° |
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1.5 |
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1.5 |
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30° |
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4.5 |
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Masking Sticker |
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Showing Zones |
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Feet |
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© 2004 Bosch Security Systems |
03/04 |
130 Perinton Parkway, Fairport, New York, USA 14450-9199 |
DS937 Installation Instructions |
Customer Service: (800) 289-0096; Technical Support: (888) 886-6189 |
P/N: 44508E Page 2 |
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