Siemens SINAMICS S120 Installation And Start-Up Manual page 149

Standards and guidelines
Various standards and guidelines for safety technology must be observed.
Guidelines are binding for both the manufacturer and operator of machines.
Standards generally reflect the state of the art and act as a basis for implementing
safety concepts. Unlike guidelines, however, they are not binding.
Below is a list of standards and guidelines for safety technology.
S EC 98/37/EG machinery directive
This guideline defines basic protection measures for safety technology.
S EN 292-1
Basic terminology and general principles for design
S EN 954-1
Safety-related parts of control systems
S EN 1050
Risk assessment
S IEC 61508
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.
Note
In conjunction with certified components, the safety functions of the SINAMICS
S120 drive system fulfill the following requirements:
S
Category 3 to EN 954-1.
S
Safety integrity level 2 (SIL 2) to IEC 61508.
A list of certified components is available on request from your local Siemens
office.
Expectations
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 ac-
knowledgement 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.
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
SINAMICS Safety Integrated (Booksize)
General information about SINAMICS Safety Integrated
5-149