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Safety distance for safeguarding danger points
8-1
Safety distance for safeguarding danger points
!WARNING
Direction of
approach
Additional countermeasures may be necessary to prevent access to the dan-
gerous area from above, below, the sides or the rear of the machine.
Formula according to EN999:
S =
(K x T) + C
Where S =
minimum distance in millimeters from the danger zone to the
detection point, line, plane or zone. If the result of the calcula-
tion is less than 100 mm, a distance of at least 100 mm must
still be maintained.
K =
Approach speed in mm/s. K can be calculated as 1600 mm/s.
T =
the overall system stopping performance in seconds
T =
t
+ t
+ t
1
2
t
=
1
t
=
2
t
=
3
Please refer to the technical information of the safety
Interface and the machine for the response time and stopping
time details.
C =
constant for body protection = 850 mm
S =
(1600 mm/s x T) + 850 mm
S
3
response time of the safety light curtain in seconds,
given in the table in SECTION 14.
response time of the safety interface t
maximum stopping time of the machine t
seconds.
Section 8-1
, if any.
si
in
m
17
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