I-9102 Intelligent Photoelectric Smoke Detector
Installation and Operation Manual
The Intelligent Solution
Page 2
IV Structure and Operation Principle
1. Appearance of the detector is shown in Fig. 1.
43
φ100
n
t
N
t
o
D
o
a
P
i
Fig. 1
2. Operation Principle
The detector detects fire by scattering of infrared beam. In smokeless condition, it only
receives very weak infrared light. When smoke particles enter, the received light signal
increases by scattering. When smoke reaches certain density, it can output alarm signal.
To reduce interference and power consumption, the emitting circuit works in pulse mode
to increase the life of emitting tube.
V Mounting and Wiring
1. Mounting of the detector is shown in Fig. 2.
Fig. 2
Bottom of the detector is shown in Fig. 3 and orientation base in Fig. 4. There are four
conducting pieces on the orientation base, each carrying a terminal with numbers. The
two bus of detector in wiring tube is connected with “1” and “3”（non-polarized）
respectively. “2” is for the anode of remote LED, and “4” for the cathode of remote LED.
The detector has only installation position because of location elements (A and B on the
orientation base, C on the bottom of the detector). Align mark C to mark A, rotate it to
mark B clockwise, and the detector is installed.
Wiring Tube
Embedded Box
Orientation Base
Detector
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