Pepperl+Fuchs KFD2-STC4-Ex Series - Page 9

Safety Manual SIL KFD2-ST*4-(Ex)*, KFD2-CR4-(Ex)*
Planning
2014-09
9
Functional Safety Wiring Configuration for KFD2-***-(Ex)1.2O* Devices
Figure 2.1 SIL2 application for KFD2-***-(Ex)1.2O* devices
Figure 2.2 SIL3 application for KFD2-***-(Ex)1.2O* devices
KFD2-***-(Ex)1.2O*
DCS 1/
ESD system 1
DCS 2/
ESD system 2
Output 1 Input A
Output 2 Input B
SIL2 transmitter
KFD2-***-(Ex)1.2O*
ESD system
Output 1 Input A
Output 2 Input B
Compare input A + B
1oo2
deviation max. 2 %
SIL3 transmitter
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