Comparison Of Mtbf For Selected Configurations; System Configurations With Redundant Cpu 410-5H - Siemens SIMATIC PCS 7 CPU 410-5H System Manual

Characteristic values of redundant automation systems
A.2 Comparison of MTBF for selected configurations
A.2

Comparison of MTBF for selected configurations

The following sections compare systems with a centralized and distributed I/Os.
The following framework conditions are set for the calculation.
● MDT (Mean Down Time) 4 hours
● Ambient temperature 40 degrees
● Buffer voltage is safeguarded
A.2.1

System configurations with redundant CPU 410-5H

The following system with one CPU (e.g., CPU 410-5H PN/DP) in stand-alone operation
serves as the basis for calculating a reference factor that defines the multiple of the system
MTBF of other systems with centralized I/O compared with the base line.
Fault-tolerant CPU in stand-alone operation
Fault-tolerant CPU 410-5H in stand-alone mode
328
Factor
1
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB