2
1127C NUMBER INSTALLATION GUIDE | DIGITAL MONITORING PRODUCTS
3
Locate the Unit:
• On a rigid vibration-free surface
• Where the expected intruder movement is across the detection pattern
Do Not Locate the Unit:
• On a surface exposed to moisture
• In any area containing excessive metallic surfaces
• Where it may be exposed to false alarm sources such as: direct sunlight, heat sources (heater, radiators,
etc.) in the field of view or strong air drafts (fans, air conditioner, etc.)
LED Survey Operation
The PIR transmitter provides a survey capability to allow one person to confirm transmitter communication with
the receiver while the cover is removed. This allows you to easily determine the best location for the 1127C.
1. Hold the 1127C in the exact desired location.
2. Press the tamper switch to send data to the panel and determine if communication is confirmed or faulty.
Confirmed:
If communication is confirmed, the survey LED under the board turns on when data is
sent to the receiver and off when acknowledgement is received. To view this survey LED, turn the
1127 sideways. Repeat this test to confirm five separate consecutive LED blinks. Any indication
otherwise means proper communication has not been established.
Faulty:
If communication is faulty, the LED remains on for about 8 seconds or flashes multiple times
in quick succession. Relocate the detector or receiver until the LED confirms clear communication.
SELECT A LOCATION
Figure 2: Detection Pattern
Top View
Side View
10’
8.0’
(2.4m)
0
10’
20’
30’
40’
(5m)
(10m)
50’
55’
(15m) (16.5m)
80
˚
52
˚
35
˚
20
˚
9˚ 4˚
