Installation Instructions for the
OD850 Outdoor
PIR/Microwave Intrusion Detector
1.0 Description
The OD850 is a 50 ft. by 50 ft. (15 m by 15 m) PIR/Microwave
intrusion detector that is intended for use outdoors and in other
harsh environments. By using Motion Analyzer II PIR signal
processing and Linear Travel Distance (LTD) microwave
processing, the detector can measure the linear travel distance of
a target to provide excellent catch performance of people while
ignoring stationary objects with slight movement such as tree
limbs and hanging signs. The combination of advanced
processing techniques and mechanical design combine to provide
a detector that offers superior performance in a wide range of
weather conditions.
2.0 Specifications
• Dimensions (HxWxD): 6.5 in. x 3.25 in. x 2.25 in.
(16.5 cm x 8.25 cm x 5.7 cm)
• Input Power: 10-15 VDC @ 22 mA standby. Maximum
current 62 mA. Use only a Listed Limited
Power Source.
• Standby Power: No internal standby battery. Standby
power must be provided
Limited Power Source.
Certificated installations, four hours (88
mAh) standby power must be provided
by the control panel or by a Listed
burglary power source.
• Alarm Relays:
Form "A": Normally closed, supervised alarm
contact opens on alarm.
Form "C": Unsupervised, timed relay contact
transfers on alarm and follows an
installer programmable timer.
Contact Ratings: 3 W, 125 mA max., 25 VDC max. for
DC resistive loads; and protected by a
4.7 Ω, 1/2 W resistor in the common
“C” leg of the relay. To be connected to
a SELV (Safety Extra-Low Voltage)
circuit only.
NOTE: Do not use with capacitive or inductive loads.
• Temperature Range: The temperature range is -31°F to
+140°F (-35°C to +60°C) for all
installations including
installations.
• Microwave Frequency:10.525 GHz
• Coverage: 50 ft. by 50 ft. (15 m by 15 m)
• Tamper: Normally Closed (with cover on).
Contacts rated 125 mA max., 25 VDC
max. To be connected to a SELV
(Safety Extra-Low Voltage) circuit only.
Connect tamper circuit to a 24-hour
protection circuit.
• Options: B335 Low Profile Swivel Mount
Bracket (supplied), B328 Swivel Mount
Bracket, B338 Ceiling Mount Bracket,
Pole Mount Bracket (supplied).
(UL Listed)
by a Listed
For UL
UL Certificated
NOTE: The use of brackets may reduce range and increase dead
zone areas.
• Patents:
• Compliance: This device complies with Part 15 of the FCC Rules and
with RSS-210 of Industry and Science Canada. Operation is subject to
the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesirable operation.
Changes or modifications not expressly approved by Detection
Systems, Inc. can void the user’s authority to operate the
equipment.
This product is covered by one or more of the following
U.S. patents #4,660,024, #4,764,755, #5,208,567,
#5,262,783, and #5,450,062. Other patents pending.
3.0 Installation Considerations
For UL installation requirements, the unit shall only be installed outdoors
for primary protection in high security installations where unwanted alarms
would be tolerated. Otherwise, the outdoor device should be used for
supplementary protection only, and be connected to a trouble zone or to a
zone that is not programmed for off-premises transmission.
• 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 LED in a constant or intermittent green or red
condition.
• Point the unit away from traffic (roads/alleys) even if they are
outside the coverage area.
• Avoid installations where hanging signs, trees or other objects
that will be moved by wind are within the coverage pattern or
where wildlife may be moving within the coverage pattern .
• Point the unit away from objects that may change temperature
rapidly.
NOTE: The PIR detector will react to objects rapidly changing
temperature within its field-of-view.
• Eliminate interference from nearby sources.
NOTE: Microwave energy will pass through glass and most
common non-metallic construction walls.
3.1 Tamper Options
The unit has a built-in cover tamper that will signal when the
detector unit (Figure 3c) is separated from the mounting plate
(Figure 3b). Optionally, the unit can be installed so the tamper will
also signal if the entire unit is pulled away from the surface on
which it is mounted.
NOTE: The wall/cover tamper option is only available when the
unit is surface mounted. The cover tamper is automatic
with all mounting options.
• Determine whether the tamper switch is to be used as a cover
tamper or a wall/cover tamper:
- for a wall/cover tamper, using an appropriate screw,
fasten the Mounting Plate Tamper section (Figure 3a)
to the wall.
- for a cover tamper, do not attach the Mounting Plate
Tamper section to the wall.
4.0 Mounting
WARNING: All wires should remain disconnected from the
power supply until all detector mounting and wiring
procedures are completed.
• Select a location likely to intercept an intruder moving across the
coverage pattern.
NOTE: This detector features a Fresnel lens to focus infrared
energy onto a sensor and an offset Look Down lens that
adds a Look Down Zone. The coverage pattern of these
lenses is shown in Figure 1.
• The surface must be solid and vibration-free.
• Mounting height range is 7 to 9 feet (2.1 to 2.7 m). Recommended
mounting height is 7 feet ( 2.1 m).
NOTE: Mounting height recommendations are based on level
surfaces. If the terrain is not level, adjust the mounting
height and detector angle to provide the best coverage.
Refer to the coverage patterns and Section 8.0.
• Choose from the available mounting methods:
4.1 surface mount using a single-gang electrical box
4.2 surface mount without an electrical box
4.3 pole mount
4.4 bracket mount using an optional bracket
NOTE: The Mounting Plate has a waterproof label (Figure 3j)
which must not be removed. When mounting, simply drive
the mounting screws through the label or punch through
the label as needed for wiring.
4.1 Surface Mount Using a Single-Gang Electrical Box
• Install a single-gang electrical box at the desired detector
location.
• Attach the mounting plate (Figure 2a) to the single-gang box with
appropriate screws.
4.2 Surface Mount Without an Electrical Box
• Select an appropriate location.
• Using the Mounting Plate as a template, mark the location of the
mounting screws and the wire run (see 5.0 Wiring).
• Attach the Mounting Plate (Figure 3b) to the wall with appropriate
screws.
4.3 Pole Mount Using the Supplied Bracket
NOTE: Do not mount to fence posts that may sway in the wind.
• Attach the supplied Pole Bracket to the Mounting Plate (Figure
2b) using appropriate screws and mounting holes.
• Use hose clamps (two recommended; not supplied) large
enough to fit around the pole to fasten the detector mounting
plate to the pole.
4.4 Surface Mount Using the Supplied Bracket or an
Optional Bracket
• Follow the instructions that come with the bracket to attach the
bracket to the surface in an appropriate location.
• If using the supplied B335 Swivel Mount Bracket, connect the
bracket to the Mounting Plate as indicated in Figure 2c.
• If using the optional B328 Swivel Mount Bracket, connect the
bracket to the Mounting Plate as indicated in Figure 2d.
• If using the optional B338 Ceiling Mount, connect the bracket to
the Mounting Plate as indicated in Figure 2e.
5.0 Wiring
WARNING: Only apply power after all connections have been
made and inspected.
• Connect wiring per the following Terminal Descriptions (Figure
3e):
5.1 Terminal Descriptions
• 1 (-) & 2 (+): Input Power (12 VDC). Use no smaller than #22
AWG (0.8 mm) wire pair.
• 3 (NC), 4 (C): Alarm Relay Contacts. Form "A" (Normally Closed,
supervised) alarm contact opens on alarm. Contacts rated
125 mA max., 25 VDC max.
• 5 & 6: Normally Closed Tamper Contacts, rated 125 mA max.,
25 VDC max.
• 7 (NC), 8 (C) & 9 (NO): Timed Alarm Relay Contacts. One
Normally Closed and one Normally Open contact with a
Common. Contacts rated 125 mA max., 25 VDC max.
NOTE: Do not connect any terminal to any power supply providing
more than 25 VDC.
6.0 Settings and Adjustments
6.1 DIP Switches
The DIP Switches (Figure 3h) are used to specify a number of
settings as follows:
6.2 LED Disable (SW0; Factory Setting ON)
This switch setting determines whether or not the LED will light
during alarm situations. This switch should be ON (LED enabled)
during walk testing, but may be OFF (LED disabled) during normal
detector operation to save power.
The following chart lists the conditions indicated by the LED:
LED Indicator Condition
Green
Red
6.3 PIR Sensitivity (SW1; Factory Setting ON)
The detector features two user-selectable PIR Sensitivity settings
as follows:
• Standard Sensitivity: Recommended setting for maximum false
• Intermediate Sensitivity: Recommended setting for any location
The appropriate switch settings for these sensitivities are:
SW1 PIR Sensitivity
OFF Intermediate
ON Standard
6.4 Timed Relay Outputs (SW2 & SW3; Factory Setting both OFF)
The detector has a Form "C," unsupervised, timed relay contact that
transfers one second after an alarm and follows a user-selectable
timer. The time will expire at the set time after the last alarm (it
resets on each new alarm). For information on wiring this contact,
see 5.0 Wiring. To select the Relay Activation Time, set the
switches as follows:
SW3 SW4 Relay Activation Time
OFF OFF 2 seconds
ON OFF 1 minute
OFF ON 5 minutes
ON ON 10 minutes
6.5 AND/OR Mode (SW4; Factory Setting ON)
This setting specifies whether the detector alarms in the AND
mode (when both technologies simultaneously sense an alarm
condition) or in the OR mode (when either the PIR or Microwave
Steady PIR alarm
Flashing Microwave alarm
Steady Dual Alarm (both technologies)
Flashing Power-up
alarm immunity. Tolerates environment extremes on this setting.
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.
Page 2 P/N 48674D © 2002 Detection Systems, Inc. All rights reserved. OD850 Installation Instructions
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