Siemens SINAMICS S120 Function Manual page 634

Safety Integrated Basic Functions
11.2 General information
● EN 60204-1
Safety of machinery - Electrical equipment of machines - Part 1: Electrical equipment of
machinery - General requirements
● IEC 61508
Functional safety of electrical and electronic systems
This standard defines "safety integrity levels" (SIL), which not only describe a certain degree
of integrity with regard to safety-oriented software but also defined, quantitative error
probability ranges with regard to the hardware.
● IEC 61800-5-2
Adjustable-speed electrical power drive systems
Part 5-2: Safety requirements - Functional
Note
Certifications
In conjunction with certified components, the safety functions of the SINAMICS S120 drive
system fulfill the following requirements:
● Safety integrity level 2 (SIL 2) to IEC 61508
● Category 3 according to DIN EN ISO 13849‑1
● Performance level (PL) d according to DIN EN ISO 13849-1
In addition, the SINAMICS S120 safety functions are normally certified by independent
institutions. A list of currently certified components is available on request from your local
Siemens office.
Two-channel monitoring structure
All the main hardware and software functions for Safety Integrated are implemented in two
independent monitoring channels (e.g. switch-off signal paths, data management, data
comparison).
The two drive monitoring channels are implemented using the following components:
● Control Unit
● Motor Module/Power Module belonging to a drive
The monitoring functions in each monitoring channel work on the principle that a defined status
must prevail before each action is carried out and a specific acknowledgment must be made
after each action.
If these expectations of a monitoring channel are not fulfilled, the drive coasts to a standstill
(two-channel) and an appropriate message is output.
Two-channel parameterization
Parameterization of the Safety Integrated functions must be performed in two channels; i.e.
there is one parameter each for the 1st and 2nd channel. These two parameters must be
identically parameterized.
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Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions