Manual R06-2016 47 / 172
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SAFETY FUNCTIONS | 5.1 Integrated safety functions (SIL2)
5 SAFETY FUNCTIONS
5.1 Integrated safety functions (SIL2)
The integrated safety functions of the SINAMICS S120 devices satisfy the requirements of the standard IEC 61508
SIL 2, as well as PL d acc. to ISO 13849-1 and Category 3 acc. to ISO 12849-1 or EN 954-1.
The following integrated safety functions are currently provided by the SINAMICS S120 drive system:
• STO - Safe Torque OFF
5.2 Extended safety functions (SIL3)
The safety category SIL3 according to IEC 61508 can be fulfilled by the application of additional measures.
• Additional motor contactor
• Safe brake control by means of a safety relay
• Contactor with mirror contact (forced) and feedback to the safety relay
Fig. 18: SIL 3 - Basic concept
Evidence of SIL 3 capability can be demonstrated with the Siemens Evaluation Tool "SET", which is available at
(http://www.industry.siemens.com/topics/global/de/safety-integrated/maschinensicherheit/safety-evaluation-tool/
Seiten/Default.aspx). Examples of the relevant configuration pages are shown below.
power supply
SIMOTION D410
SS1
ST
motor contactor
motor
safe sensor
safety relay
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