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Chapter
4
Operating instructions
Flexi Classic
78
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8011509/YPP0/2015-10-26
Subject to change without notice
Special applications and
functions
4.12 Grouping of subsystems
In case of single-channel wiring of a safety capable output (Q1-Q4) to a signal input (EN), it
is possible to achieve category 4 in accordance with EN ISO 13
849-1 or SILCL3 in accord-
ance with EN 62
061.
Exclude cross-circuits by means of appropriate cabling!
•
If several modules are used (> 1), cross-circuits on test pulse outputs (X1-Xn) can not
always be detected.
•
If two modules are used (UE410-MU or UE410-GU and a UE410- XU), cross-circuits on
safety outputs (Q1-Q4) can not always be detected.
=
If several modules are used, the possibility of cross-circuits has to be excluded by
means of appropriate cabling measures (protected installation, plastic-sheathed cable
etc.).
Note
Fig. 33: Cascading of safety
circuits
WARNING