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1128INT INSTALLATION GUIDE | DIGITAL MONITORING PRODUCTS
SELECT A LOCATION
The 1128INT’s omni-directional detection
coverage is measured from 1128INT to the
point on the glass farthest from the 1128INT.
Refer to the table below to determine the
best location to place the 1128INT based on
window type, glass thickness, window to wall
range, and wall type.
Note:
The sensor can be mounted as
close as 3.3’ (1 m) from the glass and the
minimum glass size is 1’ x 2’
(0.3 m x 0.6 m).
Optimize Detection
To optimize detection, install the 1128INT in the
following areas:
• Large rooms with moderate noise
• In the direct line of sight of all windows that are
to be protected
• On the opposite wall of the window that it’s
protecting (see Figure 4 for detection range)
Avoid False Alarms
To avoid false alarms, do not install the 1128INT in the following areas:
• Rooms with lined, insulated, or dampening drapes
• Rooms with closed, wooden shutters on the inside
• Room corners
• Where white noise (air compressor) is present
• Rooms smaller than 10’x 10’
• Rooms with multiple noise sources like televisions, sinks, speakers, etc.
• Excessively humid rooms
Note:
Program the 1128INT as a night zone to help avoid false alarms.
Check the Location Using Survey LED
1. Hold the 1128INT in the exact desired location.
2. Press the tamper switch to send data to the receiver and determine if communication is confirmed or
faulty. See Figures 2 and 3 for tamper switch and LED locations.
Confirmed:
If communication is confirmed, the survey LED turns on when data is sent to the wireless
receiver and off when acknowledgment is received.
Faulty:
If communication is faulty, the LED remains on for several seconds or flashes multiple times
in quick succession. Relocate the 1128INT or the wireless receiver until the LED confirms clear
communication. Proper communication between the 1128INT and wireless receiver is verified when for
each press or release of the tamper switch, the LED blinks immediately on and immediately off.
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MOUNT THE 1128INT GLASSBREAK DETECTOR
1. With the 1128INT already open, place the 1128INT base on the wall in
the desired location.
2. Use the provided hardware pack to mount the base to the wall. See
Figure 5 for mounting hole locations.
3. Reinstall the 1128INT cover back on to the base and tighten the holding
screw.
Window Type
Glass Thickness
Maximum Range
Wall Type
Plate
3/32" - 1/4" (2.4mm - 6.4mm)
20' (6m)
Opposite, adjoining, ceiling
Tempered
1/8" - 1/4" (3.2mm - 6.4mm)
20' (6m)
Opposite, adjoining, ceiling
Laminated
1/8" - 1/4" (3.2mm - 6.4mm)
20' (6m)
Opposite, adjoining, ceiling
Wired
1/4" (6.4mm)
20' (6m)
Opposite, adjoining, ceiling
Armor-coated
N/A
12' (3.65m)
Opposite, adjoining, ceiling
20 ft (6m) 20 ft (6m)
Figure 4: 1128INT Detection Range
MOUNTING HOLES
Figure 5: Mounting Holes
