Overview of Fail-safe Systems
1.3 Fail-safe Systems in SIMATIC S7
Safety Engineering in SIMATIC S7
1-6
System Manual, 04/2006, A5E00109529-05
Use of S7 F/FH Systems
S7 F/FH Systems fail-safe systems are used primarily in process engineering and
instrumentation and control applications in which a safe state can be attained by disabling
the fail-safe outputs.
Integration options for S7 F Systems and
S7 FH Systems in process automation systems using PCS 7 are shown below.
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Figure 1-2
Use of S7 F/FH Systems
