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N46731 6190
fADEMCO,
INSTALLATION
I
INSTRUCTIONS
Nos. 1990 and 1992
PASSIVE INFRARED
MOTION DETECTORS
N4673-1 Dl 8190
GENERAL INFORMATION
These passive infrared motion detectors are versatile wall-mounted units
employing Fresnel lenses and offering efficient protection patterns for
commercial and residential applications. The detectors sense sudden and
slight changes in temperature wlthin the areaof detection; thus, when an
intruder crosses or enters any zone, the resulting change in infrared energy
is detected for alarm reporttng. Best coverage will be obtained if mounting
is selected such that the likely direction of intruder motion is across the
pattern. The No. 1990 is a Dual unit, with 2 fields of view in each zone;
the No. 1992 is a Quad unit, with 4 fields of view in each zone (see figure 1).
/
1990
PC BOARD
HOLDING
SCREW !
I
SENSITIVITY
1
E,: f r
0. l :,
I _I
c-
0
-*
u- -L
/ 'Y
mm
I
SET TABLL
1 m
RE-"OLo*Elll*OS I
FOR SURFACE MOUNT
WIRING APPLICATIONS,
/
BREAK OUT THIN-WALL
SECTION IN BOTTOM
OF CASE.
TOP VIEW
. KNOCKOUTS
"8" (4)
FOR CORNER
MOUNTING
FOR SURFACE
MOUNTING
WIRE ACCESS SLOT
NOTE REGARDING
SENSITIVITY
CONTROL:
f
.
Figure 3. DETECTOR BASE
B. Recess Mounting
Recessed mounting requires the use of the optional No. 1990MK
Recess Mounting Kit. Complete instructions for the use of this kit
accompany it. Note: Holes "C" In the detector base are used for
recessed mountrng.
C. Changing Lenses (if required)
1. Remove front cover by inserting a screwdriver blade (or small coin)
in the groove between cover and base at the locatlon shown In Figure
2, rotating blade to override snap fit, and then lifting cover off.
2. Squeeze upper lens lock located in front cover to release upper
Fresnel lens support. Squeeze lower lens lock to release lower
Fresnel lens support (see Figure 4).
3. Note how the lens supports are positioned, then remove the supports.
4. Carefully remove the existing lens and replace with an optional
coverage replacement lens. The lens must be installed with the
smooth side facing outward. Also, the lens should be oriented with
ifs part number on the upper right-hand side (see Figure 4). Be sure
to center the lens.
SIDE VIEW
lHoc
Paw11 -
J
= CuDlKIrn
W"1
0
loft.
20ft.
3Oft 40ft.
50ft. 60ft.
(3m)
(6m) (9m) (12m) (15m)(18m)
5. Replace top and bottom lens supoorts and then Dress downward so
that the lens locks snap into posjdon, thus securing the lens in place.
NOTE: Lens surface should be free of dirt, foreign matter and
finger-prints. Use a clean dry soft cloth to wipe lens&faces,
if required.
6. Refer to Table 1 for recommended PIR mounting height, sensitivity,
pulse count settings, and pattern setting for the lens in use.
7. Replace the front cover (make sure the cover snaps tightly).
Figure 5. PC BOARDS, Nos. 1990 and 1992
INTERCHANGEABLE OPTIONAL LENSES
In addition to the standard lens supplied with Nos. 1990 and 1992, several
optional lenses are available which may be used with these PlRs to provide
a variety of protection patterns. Information for these optional lenses is
provided in Table 1, Refer to C. Changing Lenses in this document if one
of the optional lenses is being installed in place of the standard lens.
Lenses currently available from Visonic for its SRN2000 may also be used
with this PIR. The sensitivity and pulse count settings used with these
lenses will have to be determined by the installer during the walk test of
the unit. If Visonic lenses are used, they must be installed with smooth
side in (grooves outward).
NOTE: Visonic lenses are not UL Listed for use with Nos. 1990 and 1992.
TESTPROCEDURES
Important: Two-minute warm-up time is required after applying power.
Testing should be conducted with the protected area cleared of all people.
Disarm the protective system's control during the test procedure to prevent
reporting of unwanted alarms.
Walk-Test:
1. Remove front cover and set the Pulse Count jumper in the detector in
the single-event (instant response) mode. The Alarm LED must be
enabled at this time.
2. Replace front cover and walk through protective zones, observing that
the detector's LED lights whenever motion is detected (the LED serves
as a Walk-Test indicator during this procedure).
NOTE: In the single-event pulse mode, the LED stays lit (and the alarm
relay contacts remain open) for approximately 1 to 3 seconds after
detecting motion.
3. If pulse count is to be used in this application, set the pulse count jumper
to the desired pulse count setting and repeat the walk test procedure.
In 2- or 3-event pulse count, the LED serves as an alarm indicator.
The absolute range of all PIR units is subject to variation because of
different types of clothing, backgrounds and ambient temperature. Forthis
reason, ensure that the most likely intruder routes are well within the PIR's
protective zones and that walk-testing is carried out along these routes.
After the "Walk-Test" is complete, the LED may be disabled.
TOP VIEW
A
UPPER
LENS SUPPORT
LENS *
\
I
LENS
LOCK
SIDE VIEW
*LENS
IS INSTALLED
WITW SMOOTH SIDE
FACING OUTWARD
(AWAY
FROM VIEWER
IN THIS DIAGRAM)
Figure 4. CHANGING LENSES
D. Horizontal Adjustment of Lens
0
1 oft.
20ft. 30it 40ft. 50ft.
(3m)
(6m)
(9m) (12m) (15m\
The protection pattern provided by the lens in use can be moved to the
left or right by horizontal adjustment of the lens, as follows:
1. Remove front cover.
2. Press inward on the upper and lower lens locks at the left or right
side only to release the lens supports on one side. Now slide the
lens to the left or right, as needed. The lens may be moved as much
as 8" (from center) in either direction.
3. When the lens is in the desired position, press the lens locks
downward (on the released side) to lock the supports in place.
4. Replace the front cover (make sure the cover snaps tightly).
After any adjustment, you must conduct a walk test to ensure proper
coverage of the area to be protected, as indicated under "Test
Procedures".
MAINTAINING PROPER OPERATION:
In order to maintain the detector in proper working condition, it is important
that the following be observed by the user.
1. Power should be provided at all times. Loss of power to the unit will
result in the alarm contacts reverting to an alarm state. The unit's DC
source should have standby power available for at least 4 hours of
operation during emergencies.
2. Units should never be re-aimed or relocated without the advice or
No. 1990
( Dual )
No. 1992
( Quad )
Figure 1: Nos. 1990 & 1992 PROTECTION PATTERNS
INSTALLATION HINTS
l
Do not install where the detector
IS
exposed to direct sunlight or directly
above strong sources of heat.
l
Make sure the detection area does not have obstructions (curtains,
screens, large pieces of furniture, plants, etc.) which may blockthe pattern
of coverage.
l
Avoid locating a unit In areas which contain objects likely to produce a
rapid change In termperature, such as central heating, radiators or ducts
(or heaters of any kind), air conditioners, open flame, etc.
l
Do not mount on an unstable surface.
Important: Avoid running alarm winng close to heavy-duty electrical power
cables.
E. Vertical Pattern Adjustment
The protection pattern provided by the lens in use can be raised or
lowered by re-positioning the PC board in the detector. A graduated
scale to the left of the board (see Figure 5) indicates the approximate
number of degrees by which the pattern can be raised (max. + 10') or
lowered (max. -20"). The detector is normally shipped with the board
set to the 0" position. To make this adjustment, remove the cover on
the detector and loosen the screw holding the PC board (the screw is
located at the approximate center of the board). Slide the board upward
or downward by the number of degrees required, then tigh!en the holding
screw again. After any adjustment, you must conduct a walk test to
ensure proper coverage of the area to be protected, as indicated under
"Test Procedures".
F. Lens Masking
The masking strips that have been supplied are designed for application
to one or more lens segments to produce a protection pattern that suits
the particular requirements of the protected area. Individual masking
strips have been provided for each of the lens segments on the standard
lens supplied with the PIR. Simply peel off the appropriate
pressure-sensitive adhesive strip(s) and apply over the desired lens
segment(s). Be sure to affix the masking strips to the inside of the lens
(not theouter, smooth side). Each lens segment that is masked results
in the ellminatlon of one zone of protection from the coverage pattern.
By masking segments of the lens, you can adjust the coverage to suit
the area to be protected, or eliminate coverage from areas where you
anticipate environmental disturbances that might reduce the PIR's
stability (a heater or other heat-producting object for example).
IMPORTANT: When hallway pattern masking is used, be sure the PIR
is set for single event pulse count (instant response).
WIRING CONNECTIONS
Bring all wires in through the wire access slot near the terminal block and
connect to the screw terminals (see Figure 5 for wiring details). Seal all
openings in the base with foam or RTV (not supplied) to prevent drafts or
insects from entering the unit. Applypoweronlyafterallconnections
have
been made and are inspected.
PULSE COUNT OPTION
Each detector includes Pulse Count circuitry that is designed to provide
stability in adverse environments to minimize false alarms. Selectable l-,
2-, or 3-event pulse count is provided by positioning a jumper across the
appropriate pulse count terminals shown in Figure 5. When programmed
for 2- or 3-event pulse count, the detector will signal an alarm within 3 or
4 steps, since the processing logic requires more complex motion than just
a momentary event. When the detector verifies an intrusion, the LED (which
serves as an alarm indicator) will light and the alarm relay contacts will
transfer, both conditions lasting for approximately 1 to 3 seconds
(dependent upon signal strength).
assistance of the alarm service company.
3. The ohvsical surroundinas of the orotected area should not be chanaed.
If fuiniiure or stock is moved, 0; air-conditionin
c!
or additional heating
is installed, the system may have to be readjuste by the alarm service
company.
4. Walk-tests should be conducted frequently (at least weekly) to confirm
continued proper coverage by each detector.
TROUBLESHOOTING
PROBLEM
IntermIttent Alarm
(LED operative)
REMEDY
Locate source and
reposItIon detector.
INSTALLATION
A. Normal Mounting:
Mount the unit to a firm vertical surface (flat on wall or in corner). The
wall wiring hole should be no more than 5116" (8mm) diameter.
1. Remove the front cover as shown in Figure 2.
2. Remove the screw holding the PC board in the detector base (the
screw is located at the center of the board) and temporarily remove
the board (handle PC board carefully).
3. Referto Figure 3. Knockout holes in the base are available for normal
surface mounting on a wall (holes"A"), or for corner mounting (holes
"B"). Break out only those mounting holes required.
4. Feed wiring emerging from the wall through the wire access slot at
the bottom of the detector base. Make sure wires have sufficient
slack to allow the PC board to slide up and down freely when the
wires are subseauentlv connected to ihe terminals on ihe board.
Then mount the base.'
Drafts causing drapes, lrght
fixtures, display material to
move.
Ellmlnate source of
motion.
Intermittent or
Continuous Alarm
DC voltage supplied to
detector
IS
inadequate
IntermIttent, or polarit\
reversed.
Protective loop
IS
Interrupted (open)
5. Re-install the PC board (with terminal block closest to the wiring
access slot in the base). Before fully tightening the holding screw,
make sure the board is positioned so that the arrow is in line with
the appropriate setting on the graduated scale (see Table 1, and
Figure 5).
6. Refer to WIRING CONNECTIONS before replacing the front cover.
LED InoperatIve
LED control jumper set to OFF
RepositIon lumper to ON
position
LED malfunction
Check
for broken/shorted
leads
Detection Area
Repositioned furniture or
equipment in the protected
area
Caution customer about layoul
changes. ReposItIon detector.
Mounting surface IS unstable
A few degrees of vertical
shift can change range
substantially
Mount on secure surface
LED DISABLE
The detector is shipped with the Alarm LED enabled (LED CTRL jumper
in the "ON" position). If desired, the LED may be disabled (after the
"Walk-Test" is complete) by positioning the LED CTRL jumper In the "OFF"
position (see Figure 5). When the jumper is In the "OFF" posItIon, the LED
WIII not illuminate, but the relay will transfer to report alarms when the PIR
senses motion.
Control Panel Indi-
Too many No. 1990 detectors
cates Continuous
being used in the zone Each
Fault in Zone or Pro-
detector adds 22 ohms of
tection Containing
series resistance and the
1990s (PIR'S Alarm
zone's allowable loop resis-
LED Not Lit)
tance
IS
being exceeded
Reduce the number of detec-
tors used In the zone unbl the
series resistance
IS
within the
allowable loop resistance per-
mitted by the control.
Figure 2. COVER REMOVAL
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