Siemens SINAMICS G120 Function Manual page 268

System properties
8.1 Probability of failure of the safety functions (PFH value)
The integrated inverter safety functions are only ever part of a complete machine safety
function. A complete safety function comprises the following components, for example:
● A dual-channel sensor for detecting an open protective door.
● A central fail-safe controller for processing the sensor signal further.
● An inverter for safely stopping (SS1) a motor if a protective door is opened.
IEC 62061 explains how to calculate the PFH
the PFH
We provide a free tool in the Internet to calculate the PFH
Safety Evaluation Tool (www.siemens.com/safety-evaluation-tool).
Application examples for the probability of failure PFH and PFD are available in the Internet:
Application example (http://support.automation.siemens.com/WW/view/en/76254308).
268
values of the components used for the safety function.
D
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
value for the complete safety function from
D
value of a complete machine:
D
Function Manual, 04/2014, FW V4.7, A5E34261271B AA