Jung 3181 Series, Руководство по эксплуатации

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Standard / Universal automatic switch 1.1 m
Recommendation: Use air-tight appliance boxes.
Product characteristics
–
Automatic switching of light, depending on heat motion and ambient brightness
– 2 PIR sensors
– Detection field 180°
– Integrated brightness sensor
– Adjustable switch-off brightness
– Adjuster for manual adjustment of sensitivity
– Output functions: Switching, value transmitter, light scene extension, staircase function,
switching with forced position, operating mode setting for room temperature controller
– Extension of the detection field by way of operating several devices as main unit or exten-
sion unit
– Status LED
– Manual switching on the device
– Detection field can be dimmed by 50%
Additional characteristics of "Universal" version:
–
Manual operation with IR remote control possible (accessories)
– 5 function blocks for motion detection each with 2 outputs
– Function blocks switchable, e.g. for day/night operation
– Brightness sensor function with 3 limiting values
– Alarm when unplugging from the bus coupler
– Temperature measurement
Motion detection function
The detection of movements is done through the "passive infrared" principle ("PIR"). The device
generally reacts to heat radiation changes within its detection field. This is achieved with the
help of the so-called PIR sensors, which are highly sensitive in the infrared range. The geo-
metry of the detection field is ensured by a lens system that lets infrared light pass through and
concentrates incident radiation on the sensors. So-called "detection radiation" are formed
through the lens system and cause a clear signal jump to be detected when they enter.
Note: The term "detection radiation" refers to the imaginary line that begins in the sensor, goes
through the lens system and continues in a straight line outside of the device. The device itself
does not emit any radiation.
Figure 3: Thermal image of a person and their reflection on the ground
The detection of heat sources through a motion detector is influenced by the following criteria:
–
Geometry of the detection field:
A motion detector that faces downwards at an angle is different from one that looks
straight ahead into infinity .
– Distance between heat source and motion detector: the further away the heat source is
from the sensor, the weaker the evaluable signal on the sensor (Figure 4).
– Size of the heat source, e. g. adult or child (Figure 5)
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