Siemens SINAMICS S120 Function Manual page 300

Safety Integrated basic functions
9.1 General information
● EN 954-1
● EN 1050
● IEC 60204-1
● IEC 61508
Note
In conjunction with certified components, the safety functions of the SINAMICS S120
drive system fulfill the following requirements:
• Category 3 to EN 954-1.
• Safety integrity level 2 (SIL 2) to IEC 61508.
A list of certified components is available on request from your local Siemens office.
Note
When operated in proper condition and in dry operating areas, SINAMICS devices with
three-phase motors conform to Low-Voltage Directive 73/23/EEC.
● IEC 61800-5-2
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
● The 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 acknowledgement 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.
300
Safety-related parts of control systems
Risk assessment
Safety of machinery - Electrical equipment of machines - Part 1: General
Requirements for the electrical equipment of machines
Functional reliability 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.
Adjustable-speed electrical power drive systems, Part 5-2: Requirements
for safety - Functional requirements
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions