Bosch DS840 - Wiring; LED Operation; Feature Selection; LED On;Off Pins

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• Break away the Cable Knockout wire entrance.

• Open two holes for surface or corner mounting (See Figure A).

• Mark the location for the mounting screws.

- Use the enclosure as a template.

- Pre-start the mounting screws.

• Route wiring as necessary. Route to the rear of the base and

through the wire entrance. Make sure all wiring is unpowered

before routing.

• Securely attach the base to the mounting surface.

• Return the circuit board to the base.

• Install the mirror.

4.0 Wiring

Apply power ONLY after all connections have been

made and inspected. Do NOT coil excess wiring

inside the detector.

• Terminals (–) & (+): Power limits are 6 to 15

VDC. Use no smaller than #22 AWG (0.8 mm)

wire pair between the detector and the power

source.

• Terminals C & NC: Alarm relay (reed) contacts.

Do not use with capacitive or inductive loads.

• Tamper contacts: "T" Models only.

Plug the wire entrance hole with the foam plug

provided after all wiring connections have been made.

6.0 LED Operation

The detector uses a tricolor LED to indicate the various alarm and

supervision trouble conditions that may exist. See the following chart:

Steady red

Steady yellow

Steady green

Flashing red

Flashing red (4 pulse sequence)

Unit alarm

Microwave activation (walk test)

PIR activation (walk test)

Warmup period after power-up

Microwave or PIR failure -

Replace Unit

LED

Cause

If the detector experiences a Microwave or PIR self-test failure, it is in

need of replacement.

During walk testing, the LED will light for the first technology

(microwave or PIR) and then light red to indicate a detector alarm.

The LED will not indicate activation of the second technology by

lighting its color.

7.0 Feature Selection

• LED On/Off Pins: Placing the

jumper across the LED selection

pins allows operation of the

tricolor LED. If the tricolor LED

indication is not desired after

setup and walk tests are

completed, move the jumper from

across the LED selection pins.

Moving the jumper to the OFF

position does not prevent the

tricolor LED from indicating a

supervision trouble condition.

8.0 Setup and Walk Tests

• Select the vertical starting angle from the chart.

Height and desired Range

listed in feet (meters)

Mounting

Height

DS825 DS840

-6°

-10°

-12°

-4°

-8°

25 (7.5) 40 (12)

6.5 (2.0)

7.5 (2.3)

8.5 (2.6)

Required Settings for Pet Applications

Broad Coverage Mirror

• The angle adjust markings are on the mirror. Slide the mirror

forward or back until the angle hash marks are in-line with the

markers on each side of the frame.

NOTE: See Section 11.0 for Pet Applications.

• Place the LED Jumper in the ON position.

• Wait at least two minutes, after applying power, to start walk

tests.

NOTE: During the warm-up period, the tricolor LED will flash red until

the unit has stabilized (approximately one to two minutes) and

has seen no movement for two seconds. When the LED stops

flashing, the detector is ready to be tested. With no motion in

the protection area, the LED should be OFF. If the LED is on,

recheck the protection area for

disturbances affecting the microwave

(yellow) or PIR (green) technologies.

Establishing PIR Pattern Coverage

• Turn the Microwave range adjust to minimum

and replace the cover.

• Walk test across the pattern at its farthest edge,

then several times closer to the detector. Start

walking from outside of the intended protection area, and observe

the tricolor LED. The edge of the pattern is determined by the first

green, PIR activation of the LED (or the first red activation if the

yellow microwave LED activates first).

• Walk test from the opposite direction to determine both boundaries.

NOTE: The center of the pattern should be pointed toward the

center of the intended protection area.

• While standing 10 to 20 ft. (3 to 6 m) from the detector, slowly bring

your arm up and into the pattern to mark the lower boundary on

PIR alarm. Repeat from above for the upper boundary.

NOTE: The center of the pattern should not be tilted upward.

If the desired coverage cannot be achieved, try angling the coverage

pattern up or down to assure the pattern is not aimed too high or

low.

Establishing Microwave Coverage

Wait one minute after removing/replacing the cover

so the microwave portion of the detector can settle.

Wait at least ten seconds between the following walk

testing procedures.

• The tricolor LED should be OFF before walk testing.

• Walk test across the pattern at the intended coverage’s farthest

end. Start walking from outside the intended protection area and

observe the tricolor LED. The edge of the microwave pattern is

determined by the first yellow, microwave activation of the LED (or

the first red activation if the green PIR LED activates first).

• If adequate range can not be reached, increase the Microwave

Range Adjust slightly. Continue walk testing (waiting one minute

after removing/replacing the cover) and adjusting the range until

the farthest edge of desired coverage has been accurately placed.

Minimum

MW Adjustment

NC C

Alarm

Connect to a 24-hour

Protection Circuit

Cover

Off

Edge of

Circuit Board

LED

Pins

Program Plug

in the

OFF Position

LED

LED ON/OFF JUMPER PLACEMENTS