Configurations and Help with Selection
2.3 Configuration Variants for Fail-safe Systems According to Availability Requirements
Safety Engineering in SIMATIC S7
System Manual, 04/2006, A5E00109529-05
2-15
2.3.2
Single-channel I/O (S7 F Systems)
What is single-channel I/O?
In a single-channel configuration, fail-safe I/O are not redundant. The fail-safe I/O is
addressed by one F-CPU.
Required Hardware Components for S7 F-Systems
Which hardware components are required depends on whether PROFIBUS DP is configured
with copper cable or fiber-optic cable. The F-I/O is not redundant.
S7 F Systems and PROFIBUS DP with Copper Cable
The following are required to configure PROFIBUS DP with copper cable:
•
One CPU 414-4H or CPU 417-4H
•
One PROFIBUS DP line
•
Fail-safe I/O, for example:
–
One ET 200M with:
IM153-2,
F-SMs, and, if necessary, standard SMs,
safety protector (required for SIL3/Category 4 applications only)
–
One ET 200S with:
IM 151-1 HIGH FEATURE,
fail-safe modules, and, if necessary, ET 200S standard modules
–
ET 200eco fail-safe I/O module
–
Fail-safe DP standard slave
•
Bus connector for connecting the F-CPU and fail-safe I/O to the PROFIBUS DP
