2
7
1
6
9
5
2
0
1
7
-1
2
20
SLCT* and SLCT*/35 safety light curtains
Installation
Parallel approach
Figure 4.3
Explanation of the safety distance in a horizontal arrangement of the
protective field
If the safety light curtain is aligned in a horizontal position, the safety distance S
will also depend on the height of the light curtain above the floor. The maximum
height H must not exceed 1000 mm.
The safety distance is calculated as follows:
S = 1600 mm/s * (t
1
+ t
2
) + (1200 mm - 0.4 H)
Therefore (1200 mm - 0.4 H)
≥
850 mm
is required.
Distance S
H (height above ground)
Protective field
Danger
zone
Danger!
Risk of death due to possibility to bypass the protective function
If H is greater than 300 mm, there is a risk that access underneath the safety light
curtain will be possible.
Where height H is greater than 300 mm, the possibility of access must be factored
into the risk analysis or additional barriers must be used.
