Bosch DS778 Installation Manual

Installation Instructions

for the DS778

ASIC-Based

Passive Infrared Intrusion Detector

1.0 Specifications

• Input Power: 6.0 VDC to 15.0 VDC; 18 mA @ 12.0 VDC

• Standby Power: There is no internal standby battery.

Connect to DC power sources capable of supplying standby power if primary power fails. For each hour of standby time needed, 18 mAh are required.

Certificated Installations, A minimum of 4 hours (72 mAh) is required.

• Coverage: 200 ft. by 15 ft. (60 m by 4.5 m)

• Sensitivity: Adjustable for Intermediate or High.

• Alarm Relay: Form “C” reed relay with contacts rated at

28 VDC, 125 mA max. for DC resistive loads.

• Tamper Switch: Normally Closed (with cover in place) tamper switch. Contacts rated at 28 VDC, 125 mA max.

• Temperature: The storage and operating range is -40°F to +120°F (-40°C to +49°C).

Certificated installations, the temperature range is +32°F to +120°F (0°C to +49°C).

• Options: B328 Gimbal Mount Bracket, B335 Low Profile Mount Bracket,B338 Ceiling Mount Bracket, TC6000 Test Cord.

Note: Misalignment of the detector when using an optional

mounting bracket may reduce range.

2.0 Mounting

2.1 Mounting Considerations

• Select a location that is most likely to intercept an intruder moving

across the coverage pattern. The recommended mounting height range is 6.5 ft. to 8.5 ft. (2 m to 2.6 m).

* The mounting surface should be solid and vibration free.

• Avoid direct hot and/or cold drafts, direct sunlight, heat sources,

windows, air conditioning outlets, and small animals.

• This detector won’t detect through glass.

• See

Section 8.0 Coverage Patterns

2.2 Surface or Corner Mounting

Note: For bracket mounting, refer to the installations supplied

with the bracket.

• Remove the cover. Insert a thin flathead screwdriver into the

notch at the bottom of the cover and pry up.

• Remove the chassis screw in the upper right corner of the

assembly (see

Figure A

). To remove the circuit board/mirror unit from the enclosure, push the circuit board/mirror unit toward the top of the enclosure until it clears its four retainer tabs, then lift out.

For UL

• Open two holes (see

NO NCCTT

OPEN

Configuration

Switches

LED

Tamper Switch

-8

-16

Noise

Voltage

-8

-16

Figure A

Chassis

Screw

T-Strip

) for surface or corner mounting.

Wiring Knockouts

Corner Mounting Holes (4)

Bracket

Mounting

Hole

Surface Mounting Holes

or Single Gang

Box Holes (2)

Figure A - Location of Major Items -

Circuit Board and Detector Enclosure

• Mark the location for the mounting screws. Use the enclosure as a template. Pre-start the mounting screws.

• Open the appropriate wiring knockout and route the wiring through (see

Section 3.0 Wiring

• Securely attach the detector.

• Replace the circuit board/mirror unit.

• Adjust the mirror.

Note: Excessive handling of the mirror surfaces may lead to

performance degradation.

- Adjust vertically from +2° to -18° by sliding the mirror forward

or back. See

Figures B

and C to set the correct Vertical Angle

based on the mounting height and desired range.

Vertical Angle Setting

Mounting Height [ft. (m)]

6.5 (2)

7.5 (2.3)

8.5 (2.6)

100 ft. (30 m)

-2°

-3°

200 ft. (60 m)

-1°

-2°

Figure B - Mounting Height/Range Chart

- The angle adjust markings are on the sides of the mirror

(see

Figure C

Set

-1°

-16

-8

-16

-8

-16

Mirror

Figure C - Setting Vertical Angle

- Slide the mirror forward or back until the angle hash marks

are in-line with the markers on each side of the frame.

- Horizontally ±10° by rocking the mirror side to side. When the detector is installed so that its pattern is centered

down a narrow hallway, the coverage will probably not be adequate since the detector will be “looking” mostly at the walls leaving an open channel down most of the hallway as illustrated here:

Narrow Hallway Detector centered, Pattern centered

Depending on the dimensions of the hallway this can be compensated for by mounting it in the center and adjusting the horizontal angle as illustrated here:

Narrow Hallway Detector centered, Pattern rotated 1° (1 click)

- Walk test the installation carefully to ensure adequate coverage. See

Figure D

for horizontal angle adjustment

information.

10°

5°

0°

3.1 Terminal Descriptions

• 1 (-) & 2 (+): Input Power (6 - 15 VDC). Use no smaller than #22 AWG (0.8 mm) wire pair.

• 3 (NO), 4 (C), 5 (NC): Relay Contacts. Reed relay for silent operation. Contacts rated at 3 watts, 125 mA, 28 VDC maximum for DC resistive loads and protected by a 4.7 ohm resistor in the common “C” leg of the rela y .

Do not use with capacitive or inductive

loads.

• 6 & 7: Normally Closed Tamper Contacts, rated 28 VDC, 125 mA.

4.0 Configuration Switches

• Configure the detector using the appropriate switch settings (see

Figure F

123

PEN

Configuration

Switches

LED

Tamper Switch

NO NCCTT

Noise

Voltage

Chassis

Screw

T-Strip

1 ON

= LED ON

1 OFF

= LED OFF

2 ON and 3 OFF 2 OFF and 3 ON 2 ON and 3 ON

= High

= Intermediate

= Not Recommended

5° 0°

Figure F - Configuration Switch Locations

OFF

OPEN

Left/Right Pattern Adjust (1 click = 1°)

Figure D - Horizontal Angle Adjustment

3.0 Wiring

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

• Connect wiring as shown in

Contacts sh own in

normal co nditi on (no

alarm or tamper) with

power applied.

Figure E - Terminal Connections

• Seal the wire entrance with the foam plug provided.

Figure E

Alarm Tamper

NCCTT

4.1 LED Operation (S1)

• ON: Allows the LED to operate when activated by alarm.

• OFF: The LED will not operate on alarm.

4.2 Sensitivity Mode (S2 and S3)

• Intermediate Sensitivity: Recommended setting for any location

where an intruder is expected to cover only a portion of the protected area. Tolerates normal environments on this setting.

• High Sensitivity: Fast response to intruder signals. For use in quiet environments where thermal and illumination transients are not anticipated.

5.0 Setup and Walk Testing

• Replace the cover on the unit. The cover should be in place before testing the unit.

• Apply power to the detector.

• Wait for approximately two minutes, then start walk testing.

• Walk test across the coverage pattern as shown:

• The edge of the coverage is determined by activation of the LED.

• Walk test the unit from both directions to determine the boundaries.

• If the desired range cannot be achieved, try angling the mirror up or down to assure the coverage pattern is not aimed too high or low.

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