Certifications; Probability Of Failure; Safety Information & Instructions And Residual Risks; General Residual Risks For Pds (Power Drive Systems) - Siemens SINUMERIK 840D sl Function Manual

System features
4.5 Safety information & instructions and residual risks
● Distributed I/O
● SIMATIC software
4.3

Certifications

The safety functions fulfill the requirements according to EN 61508 for use up to and including
SIL2 in an operating mode with a high demand rate and Category 3 as well as PL d acc. to
EN ISO 13849-1. The average time up to a hazardous failure MTTF
hazardous failures per hour PFH
Using the safe brake test function, a brake can comply with Category 2 acc. to EN ISO 13849-1.
4.4

Probability of failure

We can provide you with a Safety Evaluation Tool (SET) - certified by the TÜV (German
Technical Inspectorate) - to evaluate the safety function (PFH value); this tool is available at
no charge. With the help of this tool, safety functions according to IEC 62061 or ISO 13849
can be calculated. As result you will receive a standards-compliant report that can be integrated
in the machine documentation as proof of safety.
See: http://www..siemens.de/safety-evaluation-tool
For additional information, please contact your local Siemens office.
4.5 Safety information & instructions and residual risks
4.5.1

General residual risks for PDS (Power Drive Systems)

Note
There are additional safety information & instructions and residual risks in other chapters,
which are listed in the relevant locations in this documentation.
44
depend on the degree of expansion of the system.
d
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
and the probability of
d
Safety Integrated