Mounting
Leuze electronic GmbH + Co. KG
ELC 100
19
To be determined is the permitted height a of the point of operation.
Ä
In the column head, look for the column with the next lowest entry for the height of the upper beam of
the safety sensor.
Ä
Look for the next lowest value for real additional distance C
RO
in this column.
ð
In this line, go to the left column: here you will find the permitted height of the point of operation.
Ä
ð
The larger of the two values S
RT
and S
RO
is to be used.
Calculation example
The feeding-in area in a press with a stopping time of 130 ms is to be safeguarded with a safety light cur-
tain with 17 mm of resolution and 600 mm of protective field height. The response time of the safety light
curtain is 9.5 ms; the press Safety PLC has a response time of 40 ms.
The safety sensor can be reached over. The upper edge of the protective field is located at a height of
1400 mm; the point of operation is located at a height of 1000 mm
Additional distance C
RO
to the point of operation is 700 mm (see table “Reaching over the vertical protective
field of electro-sensitive protective equipment (excerpt from ISO/EN ISO 13855)”).
Ä
Calculate safety distance S
RO
using the formula acc. to ISO/EN ISO 13855.
K
[mm/s]
=
2000
T
[s]
=
(0.0095 + 0.040 + 0.130)
C
RO
[mm]
=
700
S
RO
[mm]
=
2000 mm/s × 0.17915 s + 700 mm
S
RO
[mm]
=
1058
S
RO
is larger than 500 mm; this is why the calculation may be repeated with approach speed 1600 mm/s:
K
[mm/s]
=
1600
T
[s]
=
(0.0095 + 0.040 + 0.130)
C
RO
[mm]
=
700
S
RO
[mm]
=
1600 mm/s × 0.17915 s + 700 mm
S
RO
[mm]
=
987
NOTICE
Depending on the machine construction, stepping behind protection, e.g. using a second hori-
zontally arranged safety light curtain, is necessary.
