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Installation Instructions

D8535 TriTech™

Microwave/PIR Intrusion Detector

1.0 Specifications

Input Power:  9 to 15 VDC, 16 mA DC nominal (up to 48 mA DC during
walk testing or trouble conditions).

Standby Power:  No internal standby battery. Connect to DC power
sources capable of supplying standby power. Sixteen mA-H required for
each hour of standby time needed. 

Four hours (64 mA-H) minimum are

required for Underwriters Laboratories’ Certificated installations.

Alarm Relay:  Silent operating Normally Closed reed relay. Contacts rated
3 Watts, 125 mA, 28 VDC maximum for DC resistive loads; and protected
by a 4.7 ohm, 1/2 Watt resistor in the common “C” leg of the relay. Do not
use with capacitive or inductive loads.

Operating Temperature:  -40

°

 to +120

°

F (-40

°

 to +49

°

C). 

For U. L.

Certificated installations, the temperature range is +32

°

 to +120

°

F (0

°

 to

+49

°

C).

Microwave Frequency:  10.525 Ghz (U. L. Listed)

Coverage:

35 ft. by 35 ft.

(10.7 m by 10.7 m)

Internal Pointability:  +2

°

 to –10

°

 Vertical, 

±

10

°

 Horizontal.

Tamper:  Normally Closed (with cover on). Contacts rated at 28 VDC, 125
mA maximum.

Options:  B328 Gimbal Mount Bracket, B335-3* Low Profile Swivel Mount
Bracket (use of a bracket may reduce range and dead zone areas).
*Shipped in packages of three.

U. S. Patent Numbers: # 4,660,024, # 4,764,755, # 5,077,548,
# 5,208,567, # 5,262,783, and # 5,450,062. Other patents pending.

2.0 Installation Considerations

Never install the detector in an environment that causes an alarm condition
in one technology. Good installations start with the LED OFF when there is
no target motion. It should never be left to operate with the tri-color LED in
a constant or intermittent green, yellow, or red condition.

Point the unit away from outside traffic (roads/alleys). Remember:
Microwave energy will pass through glass and most common non-metallic
construction walls. Avoid installations where rotating machines (e.g. ceiling
fans) are normally in operation within the coverage pattern.

Point the unit away from glass exposed to the outdoors and objects that
may change temperature rapidly. Remember:  The PIR detector will react
to objects rapidly changing temperature within its field-of-view.

Eliminate interference from nearby outside sources.

3.0 Mounting

Select a location likely to intercept an intruder moving across the coverage
pattern. The surface should be solid and vibration-free. Mounting height
range is 6 to 8 ft. (1.8 to 2.4 m). Recommended mounting height is 6-1/2
ft. (2 m).

Remove the cover. Insert a flathead screwdriver into the locking tab hole at
the bottom front of the detector. Pull the cover up and forward.

Mount the unit with the terminal block up.

Remove the circuit board from the base by Loosening the Vertical Adjust

Screw and sliding the circuit board down then out.

Break away the appropriate thin-wall wire entrance and mounting hole
coverings in the base.

Using the base as a template, mark the location of the holes on the
mounting surface.

Route wiring (unpowered) as necessary. Route to the rear of the base and
through the wire entrance.

Firmly mount the base to the mounting surface. Return the circuit board to
the base and tighten the Vertical Adjust Screw.

4.0 Wiring

CAUTION:

APPLY POWER ONLY AFTER ALL CONNECTIONS HAVE
BEEN MADE/INSPECTED. DO NOT COIL EXCESS WIRING
INSIDE DETECTOR.

Terminals 1(–) & 2(+):  Power limits are 9 to 15 VDC. Use no smaller than
#22 AWG (0.8 mm) wire pair between the
detector and the power source.

Terminals 3 & 4:  Alarm relay (reed)
contacts. Do not use with capacitive or
inductive loads.

Terminals 5 & 8:  Spare.

Terminals 6 & 7:  Tamper contacts.

Plug the wire entrance hole with the foam plug provided after all wiring
connections have been made.

5.0 LED Operation

The detector uses a tri-color LED to indicate the various alarm and supervi-
sion trouble conditions that may exist. See the chart below.

LED

Steady red

Steady yellow

Steady green

Flashing red

Flashing red (4 pulse sequence)

CAUSE

Unit alarm

Microwave Activation (walk test)

PIR activation (walk test)

Warmup period after power-up

Microwave or PIR failure. Replace unit.

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.

6.0 Feature Selection

LED On/Off Pins:  The ON
position allows operation of the
tri-color LED. If the tri-color LED
indication is not desired after
setup and walk tests are
completed, place the plug in
the OFF position. The OFF
position does not prevent the
tri-color LED from indicating a
supervision trouble condition.

PIR Sensitivity Selection Pins:  The PIR response sensitivity may be
selected by placing the plug across the pins marked (STD) for Standard or
(INT) for Intermediate mode.

Standard Sensitivity:  The recommended setting for maximum false alarm
immunity. Tolerates environmental extremes on this setting.

Intermediate Sensitivity:  The recommended setting for non-pet applica-
tions where an intruder is expected to cover only a small portion of the
protected area. Tolerates normal environments on this setting. This setting
will improve your intruder catch performance. (Recommended for higher
mounting heights).

D8535 Installation Instructions

Page 1

© 1996  Radionics

P/N 31362B

TriTech™ is a trademark of Detection Systems, Inc.

Radionics

9-15 VDC

Input

1

2

3

4

+

C

NC

Alarm
Relay

Alarm

5

6

7

8

SP

T

SP

T

Tamper

S

p
a

r

e

Tamper

S

p
a

r

e

Tri-color

LED

Vertical Adjust Screw

Terminal

Strip

LED

On/Off

Pins

MW

0

°

- 4

°

- 8

°

On

Off

Microwave

Range Adjust

PIR
Sensitivity
Selection Pins

Vertical Adjust Scale

Look Down Mask

MIN

MAX

Locking
Tab

LED

LED Pins

PIR Sensitivity Pins

On

Off

Standard

Intermediate

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