Siemens FDL241-9 - Page 8

● Effective range(1): The effective range is the connection between the
transmitter, reflector and receiver.
● Core range(2): In the core, enough radiation energy is present to operate the
system.
● Scattering range(3): The radiation energy in the scattering range is insufficient
and does not ensure the functionality of the system.
FDL
DLR
1 2
3
Figure 3: Setup of the infrared ray
1 Effective range 3 Scattering range
2 Core range
1
2
3
DLR
d
0,57°
0,57°
FDL
Figure 4: Diameter of the core
1 Opening angle d Diameter of the core range
depending on the detection
distance
2 Diameter of the core l Detection distance
3 Infrared ray
Example of calculating the diameter of the core range depending on the detection
distance:
Known: Detection distance l = 100m
Wanted: Diameter d of the core
Adjustment options for the infrared ray
The infrared ray can be adjusted horizontally by a maximum of 10° in either
direction and vertically by a maximum of 5° in either direction. This adjustment
range can be used for an optimum positioning of the devices. In the case of
detection distances greater than 50m, position the detector and reflector as close
to opposite one another as possible. This makes adjustment easier.
Structure and function
Overview
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