User Manual
Appendix A
GFK-2843A
Jan 2020
VersaSafe system
74
The safe input and output signals are now available for the configuration of the safety
function of the master IC220SDL963.
The 16 safe input and output signals represent the newly added safe external signals of the
IC220SDL963 SL module, which can be obtained from the “External signals” toolbox in the
corresponding VersaConf Safety project for the IC220SDL963 SL module.
Figure 20:
VersaConf Safety project for the IC220SDL963 “slave” module
Cross communication output Q1 of the IC220SDL963 SL, in the master project,
corresponds to cross communication input 0_II1 of the IC220SDL963 SL project.
Up to 16 safe signals can therefore be exchanged bidirectionally between two
IC220SDL963 modules.
A master project can communicate with a maximum of 16 IC220SDL963 modules.
Note:
Special calculation of the total failure rate required
•
If more than 6 islands are linked in series, special calculation of the total failure rate is
required.
•
For each additional island, 2% of 10
-7
must be added to the PFH value.
