Important information
DANGER
H
azard due to lack of effectiveness of the protective device
Persons and parts of the body to be protected may not be recognized in case of
non-observance.
b
Make sure that the following construction requirements are met so that the safety
light curtain can fulfill its protective function.
°
Sender and receiver must be arranged such that persons or parts of the body
are reliably detected when they enter the hazardous area.
°
Reaching under, over, and around as well as moving the safety light curtain
must be prevented.
°
Check whether additional safety measures (e.g. restart interlocking) are nec‐
essary when it is possible for people to be located between the protection
system and the danger point without being detected.
DANGER
H
azard due to lack of effectiveness of the protective device
Certain types of light radiation can influence the protective device, e.g., light radiation
from fluorescent lamps with electronic ballast installed in the path of the beam, or
beams from laser pointers directed at the receiver.
b
If this type of light radiation is present in the environment of the protective device,
take additional measures to ensure that the protective device does not become
dangerous.
Further topics
•
"Mount
ing", page 66
4.3.1 Scanning range and protective field width
Protective field width
T
he protective field width is the dimension of the light path between sender and
receiver. The maximum protective field width is limited by the scanning range.
Scanning range
T
he scanning range limits the maximum protective field width. The protective field width
can change during operation based on the corresponding setting.
The scanning range is reduced by using deflector mirrors.
There are 2 ways to adjust the scanning range:
•
Automatic calibration of the protective field width
When switched on, the safety light curtain automatically calibrates to the protec‐
t
ive field width. The position of the safety light curtain may not change later.
•
D
ynamic protective field width
A range is set for a dynamic protective field width. Within this range, the protective
f
ield width may change during operation.
Complementary information
Depending on the scanning range setting, a minimum distance to reflective surfaces
must be maintained.
PROJECT PLANNING 4
8023872/18YZ/2021-01-14 | SICK O P E R A T I N G I N S T R U C T I O N S | deTec4 Ex II 3GD
27
Subject to change without notice
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