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SICK MSL
8 007 653/09-04-01 Technical Description • MSL © SICK AG • Safety Systems • Germany • All rights reserved
5.2.3 Safety gap for horizon-
tal multi-beam danger
area guarding accord-
ing to EN 999
The safety gap for horizontal zone
guarding is calculated using the
following formula:
S = (1600 mm/s T) +
(1200 mm 0,4 H)
H
Height of protective field above the
reference level, e. g. floor, in mm.
With this configuration, the height
(H) of the protective field must not
be greater than 1000 mm. During
risk assessment, unintentional access
by creeping under the light beams
must be taken into consideration.
The minimum permissible height (H)
of the protective field must be
calculated as follows:
H = 15 (d 50 mm)
d
Resolution of safety device
The resolution is derived from gap
+ light beam section.
Example:
Resolution MSL Height H in
mm mm
73 mm 345
93 mm 645
Fig. 8: Safety gap S and height H for hazardous guarding
Lateral
partitioning wall
Direction of entry
into danger area
Point of operation
Access guarding
with MSL
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