Siemens SIMATIC PCS 7 CPU 410-5H

Characteristic values of redundant automation systems
A.2 Comparison of MTBF for selected configurations
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB
333
A.2.3
Comparison of system configurations with standard and fault-tolerant
communication
The next section shows a comparison between standard and fault-tolerant communication
for a configuration consisting of a fault-tolerant system, a fault-tolerant CPU operating in
stand-alone mode, and a single-channel OS.
The comparison only took account of the CP and cable communication components.
Systems with standard and fault-tolerant communication
Standard communication
Base line
1
Fault-tolerant communication
Factor
Approx. 80