57
2504708-03-02/21 (translation of the original operating instructions)
Operating Instructions
Light Grids/Light Curtains LCA 2
EN
7. Mounting
Transmitter and receiver must be positioned while maintaining the minimum safety distance
S
. It must not be possible to
reach the danger zone until the hazardous machine movement stops (see Figure 5 ). The safety distance for light grids and
light curtains must be calculated as per the following chapters.
Figure 5:
Safety distance
S
The minimum safety distance
S
is calculated based on the following formula:
S
=
K
(t1
+
t2)
+
C
C
=
8
(d
–
14)
Variable
Definition
S
Minimum safety distance [mm] is given by the distance between
the start of the detection area and the start of the danger zone
K
Approach speed of the body to the danger zone [mm/s]
t1
Total reaction time for the item of electro-sensitive protective equipment in seconds [s]
t2
Reaction time of the machine in seconds;
this is the time the machine requires to interrupt the dangerous process after a stop signal [s]
C
Additional distance, which varies depending on the application [mm]
1)
d
Resolution [mm]
1) For further information in relation to the additional distance, see EN 13855:2010
Important!
Ì
The minimum safety distance must be maintained because otherwise the protective function of the
device will not be ensured.
Ì
If it is possible to access the danger zone without interrupting the protective field, a guard must be
provided in addition.
Summary of Contents for LCA 2 Series
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