System Features; Certification; Probability Of Failure Of The Safety Functions (Pfh Value) - Siemens SINAMICS S120 Function Manual

System features

2.1

Certification

The safety functions described in this manual were developed in accordance with
requirements to IEC 61508, ISO 13849-1 (previously EN 954-1) and IEC 61800-5-2
standards. Certification procedures are in progress at an accredited test institute.
The certificate and the list of certified components can be obtained from your local sales
office after inspections have been concluded.
2.2

Probability of failure of the safety functions (PFH value)

Probability of failures
The probability of the failure of safety functions must be specified in the form of a PHF value
(Probability of Failure per Hour) in accordance with IEC 61508, IEC 62061 and ISO 13849-1.
The PFH value of a safety function depends on the safety concept of the drive unit and its
hardware configuration, as well as on the PFH values of other components used for this
safety function.
Corresponding PFH values are provided for the SINAMICS S120 drive system, depending
on the hardware configuration (number of drives, control type, number of encoders used, ...).
The various integrated safety functions are not differentiated.
The PHF values can be requested from your local sales office.
Safety Integrated
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
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