Fiessler ULVT - 8 Cascading of Light Curtains; Additional Safety Advices Tor Cascaded Light Grids; Application Examples

8 Cascading of light curtains -Safety instructions
8.1 additional safety instructions for cascaded light curtains
a) Protection at the 3 sides of a
C-press without the obstacles of
vertical tilted mirrors .
fig 33/1 Protection at a C-Press
fig 33/3 protection at the rear of the press
fig 33/2 Protection against walking behind
b) Protection against walking be-
hind the light curtain
c) Protection at the rear side of the
press
All safety advices as stated in chaper 1 and in chapter 7 must be strictly observed!
Mix of category 4 and category 2: The admissability of a combination of systems belonging to category 4
and category 2 always depends on the results of the risk assessment of the installation! Any light curtain of
category 2 will not be automatically upgraded to a category 4 light grid! It must be made sure that the main
sensor (Master sensor) is a light curtain of category 4 in order prevent the system to be completely downgra-
ded to categroy 2!
Arrangement of the light curtains: It must be made sure that the mutual clashing of the light
curtains is prevented. (refer alsot o chapter 4.3.5 page 18)
length of cables: The cable length between the cascaded light curtains must not exceed 10 m.
Response times / Safe distance : In case of any interruption of a cascaded light curtain, the response ti-
me will increase for 3 ms per preceding light curtain. This must be drawn into the calculation of the dafe distan-
ce.
Arrange only protective fields by using compatible conponents (i.e. Master sensor receiver with master sen-
sor transmitter)
8.2 Application examples:
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E L E K T R O N I K
33
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