N7852V2 10/95
Passive Infrared Detector/
998MX
Installation Instructions
General Information
This passive infrared motion detector is designed for use
with control panels that support polling loop devices
equipped with DIP switches or polling loop devices that
require their serial number to be ÒlearnedÓ*. It is a versatile
wall-mounted unit employing Fresnel lenses and offering
efficient protection patterns for commercial and residential
applications. Best coverage will be obtained if mounting is
selected such that the likely direction of intruder motion is
across
the pattern.
*
If the control panel supports Serial No. learning, you
MUST configure the 998MX as a Serial No. device (see
ÒAddress/Serial No. ID section).
This detector is also equipped with Òdownward lookingÓ
optics to cover the normally ÒdeadÓ zone directly beneath a
detector.
The detector is shipped with the standard wide angle lens
installed, but. also supports a pet alley lens (998-PA) and a
long range lens (998-LR). These lenses are purchased sep-
arately. An optional swivel mounting bracket is available
(998SB).
Specifications
Detection Method:
Passive Infrared.
Coverage:
Standard Wide Angle Lens
50ft x 50ft (15.2m x 15.2m), 90o
Optional Lens:
998-PA, Pet Alley Lens
50ft x 70ft (15m x 21.3m), 100o
998-LR, Long Range Lens
100ft x 10ft (30m x 3m)
Detection Zones:
W/Standard Lens:
18 zones (9 long range, 5
intermediate, 2 short range).
W/Optional Lenses:
998-PA 12 zones
998-LR 5 zones (1 long
range, 2 intermediate, 2 short
range).
Detector provides one Òdownward look-
ingÓ zone with all lenses (downward look-
ing lens must be masked when using the
998-PA).
Pulse Count:
Installer-selectable (1, 2 or 3)
Detectable
Walk Rate:
0.5 Ð 5ft/sec (0.15m Ð1.5m/sec)
Mount Height:
7ft nominal (2.1m)
Indicator:
Red LED with enable/disable link.
Input Voltage:
8-11V peak to peak at polling
loop terminals.
Current:
1mA (LED disabled)
3mA (alarm LED enabled)
Standby:
Power source should be capable
of at least 4 hours of battery
standby.
Operating Temp:
14oF Ð 122oF (-10o Ð +50oC)
Humidity:
Up to 95% RH (max.),
non-condensing.
Dimensions:
2Ó W x 4Ó H x 2Ó D (max protru-
sion) (67mm x 111mmx 54mm).
Installation
A. Normal Mounting:
Mount the unit to a firm vertical surface. The wall wiring hole
should be no more than 5/16Ó (8mm) in diameter.
1. Remove the front cover as shown in Figure 1.
2. Loosen the screw holding down the PC board.
3. Refer to Figure 2. For clarity, the PC board is not show
in this diagram. Knockout holes ÒAÓ in the base should
be used for normal surface mounting on the wall. For
corner mounting see section B, below. Also break out
the desired wire entry hole at this time (holes are
marked X in Fig. 2).
4. Feed wiring emerging from the wall through the wire
access hole near the top 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 connected
to the terminals on the board. Mount the base. Note the
mounting orientation of this detectorÑwire entry is at
the top, lens at bottom.
5. Before fully tightening the PC board 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).
6. Refer to WIRING CONNECTIONS before replacing
the front cover.
B. Corner Mounting:
1. Orient the corner mounting bracket with ÒhooksÓ point-
ing upward. (See Fig. 3), and mount in selected corner
with 4 screws.
2. Break out the Òrelease slotÓ (identified in Fig. 2) in the
detector base. Failure to do this will make it impossible to
remove the detector after mounting.
3. Press the detector base onto the bracket so that the
bracket ÒhooksÓ are forced through the four self-closing
slots in the base (see Fig. 2), then pull downward to
secure onto the bracket
.
To Remove The Detector After Mounting
1. Remove cover and PC board.
2. Using blade of small screwdriver, push through the slot
in base of detector, press on the release tab in the cor-
ner mounting bracket, then pull detector upward and
away from bracket.
C. Changing lenses (if required)
1. Remove front cover.
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 positions, then remove
the supports.
4. Carefully remove the existing lens and replace with
an optional coverage lens.
The lens must be
installed with the smooth side facing outward.
Also, the lens should be oriented with
its part number on the upper right-hand side
(see
Figure 4)
.
Be sure to center the lens.
Note:
Lens surface should be free of dirt, foreign
matter and finger-prints. Use soft dry cloth to wipe
lens surface.
5. Replace top and bottom lens supports and then press
downward so that the lens locks (with lens) snap into
position.
6. Refer to Table 1 for recommended detector pattern
settings for various mounting heights and protection
ranges.
7. Replace the front cover (make sure cover snaps tight-
ly).
D. Horizontal Adjustment of Lens
The protection pattern can be moved to the left or right by
horizontal adjustment as follows:
1. Remove the 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 4o (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 sup-
ports in place.
4. Replace the front cover (make sure the cover snaps on
tightly).
After adjustment, conduct a walk test to ensure proper cov-
erage of the area to be protected; see ÒTest ProceduresÓ.
E. Vertical Pattern Adjustment
The protection pattern can be raised or lowered by re-posi-
tioning the PC board in the detector. A graduated scale to the
right of the board (see Fig. 5) indicates the approximate
number of degrees by which the pattern can be raised (max
+5o) or lowered (max -20o). To make this adjustment,
loosen the screw holding the PC board. Slide the board
upward or downward by the number of degrees required,
then tighten the holding screw again. After any adjustment,
conduct a walk test to ensure proper coverage of the area
to be protected; see ÒTest proceduresÓ.
F.
Lens Masking:
The supplied masking strips can be used to produce a pro-
tection pattern that suits the particular requirements of the
protected area, or eliminate coverage from areas where
you anticipate environmental disturbances that might
reduce the PIRÕs stability (a heater or other heat-producing
object for example). Simply peel off the appropriate pres-
sure-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 the outer, smooth side). Each lens
segment that is masked results in the elimination of one
zone of protection from the coverage pattern.
The standard lens can be used to provide a pet alley. To do
so mask the bottom two rows as shown in Fig. 4 and mount
as though the optional pet alley lens was installed.
Important: If using the Pet Alley lens or if you have
masked the standard lens to emulate a pet alley lens
▲
(1) INSERT SCREWDRIVER
IN GROOVE AND TWIST
▲
(2) REMOVE
COVER
DOWNWARD-LOOKING
WINDOW
▲
Figure 1.
Cover Removal
IMPORTANT
NOTE THE MOUNTING
ORIENTATION OF THIS
DETECTOR. WIRE ENTRY
IS AT THE TOP, AND LENS
IS AT THE BOTTOM!
Protection Pattern, Standard Lens
KNOCKOUT HOLES
A = SURFACE MOUNTING (3)
B = BREAKOUT
"RELEASE SLOT"*
X = WIRE ENTRY (5)
*BREAK OUT FOR CORNER
MOUNTING ONLY
SELF-SEALING
SLOTS IN BACK
OF DETECTOR (4)
X
X
X
X
X
A
B
A
A
Figure 2
Detector Base
(3)
➞
TOP
N6672V1
CORNER MOUNTING BRACKET
HOLES FOR CORNER
MOUNTING SCREWS
"HOOKS" (4)
CORNER
OF
WALL
SELF-SEALING SLOTS IN BACK OF
DETECTOR
CORNER MOUNTING BRACKET
ÒHOOKSÓ (4)
BRACKET MOUNTING
SCREWS (4)
DETECTOR BASE
Figure 3. Corner Mounting
Protection Pattern,
No 998-PA
Pet Alley Lens
(Optional)
Protection
Pattern,
No.998-LR
Long Range
Lens
(Optional)
Figure 4. Changing Lenses
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