Probability Of Failure Of The Safety Functions (Pfh Value) - Siemens Sinamics S110 Function Manual

Safety Integrated Functions
8.3 System features
8.3.3

Probability of failure of the safety functions (PFH value)

Probability of failure
The probabilities of safety function failure must be specified in the form of a PHF value
(Probability of Failure per Hour) to 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 S110 drive unit, depending on
the hardware configuration (control type, ...). The various integrated safety functions are not
differentiated.
The PHF values can be requested from your local sales office.
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Function Manual, 10/2008, 6SL3097-4AB10-0BP0
Drive functions