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7.13 Cascading
Achievable safety rating
Notes
Note: All example applications shown are proposals without warranty. In any case the operator has
to perform a safety review of the entire site.
The following shows the cascading of EP-19xx modules. When the safety door for the robot cell is
opened in the example, the conveyor belt is also switched off at the same time. In contrast, switching
off the conveyor belt (for example, with the cable-pull switch) does not automatically switch off the
robot cell.
Multiple cascade levels and also multiple EP-19xx modules can be used on a single level. Be aware
that the triggering of an EP-19xx module immediately switches off the 24 V supply of all subsequent
safe powerfeed modules. A delay of these modules is then no longer effective.
GFK-2956A
Cat. 4
PLe
SIL3
A shielded cable installation is necessary if
the safely switched-off line (24 V OSSD on
4.2) runs outside the switch cabinet.
EP-1901
EP-2214
Example Application for Cascading
November 2017
Chapter 7. Example Applications
DIN EN ISO 13849-1
DIN EN ISO 13849-1
IEC 62061/61508
EP-1901
EP-2214
65
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