Series Of Standards En 61508 (Vde 0803); Risk Analysis/Assessment - Siemens SINAMICS G120 Function Manual

A.1.2.6

Series of standards EN 61508 (VDE 0803)

This series of standards describes the current state of the art.
EN 61508 is not harmonized in line with any EU directives, which means that an automatic
presumption of conformity for fulfilling the protective requirements of a directive is not
implied. The manufacturer of a safety-related product, however, can also use EN 61508 to
fulfill basic requirements of European directives in accordance with the latest conceptual
design, for example, in the following cases:
● If no harmonized standard exists for the application in question. In this case, the
● A harmonized European standard (e.g. EN 62061, EN ISO 13849:2006, EN 60204-1)
EN 61508 covers all the aspects that must be taken into account when E/E/PES systems
(electrical, electronic, and programmable electronic System) are used in order to execute
safety functions and/or to ensure the appropriate level of functional safety. Other hazards
(e.g. electric shock) are, as in EN ISO 13849:2006, not part of the standard.
EN 61508 has recently been declared the "International Basic Safety Publication", which
makes it a framework for other, sector-specific standards (e.g. EN 62061). As a result, this
standard is now accepted worldwide, particularly in North America and in the automotive
industry. Today, many regulatory bodies already stipulate it (e.g. as a basis for NRTL listing).
Another recent development with respect to EN 61508 is its system approach, which extends
the technical requirements to include the entire safety installation from the sensor to the
actuator, the quantification of the probability of hazardous failure due to random hardware
failures, and the creation of documentation covering all phases of the safety-related lifecycle
of the E/E/PES.
A.1.2.7

Risk analysis/assessment

Risks are intrinsic in machines due to their design and functionality. For this reason, the
Machinery Directive requires that a risk assessment be performed for each machine and, if
necessary, the level of risk reduced until the residual risk is less than the tolerable risk. To
assess these risks, the following standards must be applied:
● EN ISO 12100-1 "Safety of Machinery - basic terminology, general principles for design"
● EN ISO 13849-1:2006 (successor to EN 954-1) "Safety of machinery"
● EN ISO 14121-1 (previously EN 1050, Paragraph 5) "Safety of machinery - Risk
EN ISO 12100-1 focuses on the risks to be analyzed and the design principles for minimizing
risk. EN ISO 14121-1 describes the iterative process for assessing and minimizing risk to
achieve the required level of safety.
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA
manufacturer can use EN 61508, although no presumption of conformity exists here.
references EN 61508. This ensures that the appropriate requirements of the directives
are fulfilled ("standard that is also applicable"). When manufacturers apply EN 61508
properly and responsibly in accordance with this reference, they can use the presumption
of conformity of the referencing standard.
assessment"
Appendix
A.1 Standards and regulations
161