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.

Mounting Height

8 ft. (2.4 m) 10 ft. (3.0 m) 12 ft. (3.7 m)

Detection Area

Maximum Diamete

38 ft. (11.6 m) 46 ft. (14.0 m) 50 ft. (15.2 m)

3.0 Avoid:

Direct Hot or

Mounting Outdoors

Moving

Objects

Pets and

Small Animals

Cold Drafts

Heat Sources

4.0 Mounting

4.1 Use the mounting template to position and drill the wiring

hole and starter holes for the two mounting screws provided with the detector.

• 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 counts.

• Storage and +14°F to +122°F (-10°C to +50°C).

Operating Temperature:

• Humidity: 0 to 95% non-condensing

• Dimensions: 5 inches diameter by 1.5 inches high (125 mm diameter x 38 mm high)

Air Conditioning

Outlets

Windows and

Uninsulated Walls

Water or

Oil Vapor

Direct Exposure

to Sunlight

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

1. Remove the Outer Cover Ring (may be pried loose with a small flatbladed screwdriver).

2. Loosen the cover screw.

3. Turn the cover dome counterclockwise and lift it off the detector.

1. Pry here if necessary

2. Loosen Cover Screw

4. Slide the detector over the mounting screws.

5. Rotate the detector clockwise until the slots firmly engage the mounting screws.

6. Tighten the mounting screws.

3. Rotate Cover to unlock

Mounting Holes

4.4

Connect wires to the

Terminal Block by passing them through the Wiring Passage.

Power Input (nonpolar)

Alarm Output (Normally Closed)

Alarm Memory First To Latch Tamper Switch

(Normally Closed)

Only apply power after all connections have been made and inspected.

4.5 Wire as shown to use the Alarm Memory and First To Latch functions. 4.6 Set the LED On/Off Select Switch.

7Meters

010

Feet

130°

90°

1023

01020

Feet

155

1.5

4.5

5101520

1.5

4.5

30°

Sensitivity Switches

Detection Range Adjustment

4. Tighten Cover Screw

5. Align Outer Cover Ring with Detector and press until it locks in place.

3. Rotate Cover to lock

1. Align Ridges

2. Push Cover on

Align with Ridges

Align Notches

Align with Cover Screw

Rotate

DS937

F.T.L. A.MF.T.L. A.M

DS937

DC 12V

Control Panel

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.

During the warm-up period, the LED flashes for about 30 seconds and the relay is kept in

LED On/Off Select Switch

alarm condition. If you don’t want the alarm LED to light, it can be turned off with this switch.

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.

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.

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.

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. 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.

4.8 Mask unwanted detection zones (see

Patterns

) by lifting the Lens Lock, rotating and removing the

6.0 Coverage

Fresnel Lens, and covering the unwanted lens areas with the masking sticker.

Rotate Fresnel

Clean the Fresnel Lens

Lens to remove

with a soft, clean, damp cloth. Make sure there is no

Lens Lock

dirt or fingerprints on the lens.

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. 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.

Walk test from both directions to determine the

4.9 Reassemble the detector.

6.0 Coverage Patterns

A B

Masking Sticker

Showing Zones

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DS937 Installation Instructions

P/N: 44508E Page 2