Din En 61508 (Vde 0803) Or Iec 61508 - Siemens SINUMERIK 840D sl Function Manual

Regulations and Standards
1.2 Safety of machinery in Europe
Note
EN IEC 62061 is ratified as EN. It will be harmonized under the Machinery
Directive in 2005.
1.2.6

DIN EN 61508 (VDE 0803) or IEC 61508

Standards of the IEC 61508 series were included as EN 61508 is the European
Community and as DIN EN 61508 (VDE 0803) in Germany. These series of Stan-
dards describe state-of-the-art technology; however, they only have to be observed
on a voluntary basis and they are not binding.
IEC 61508 is not harmonized under a particular European Directive. This means
that it cannot be used as a basis for automatic presumption that the protective
goals of a Directive are fulfilled. However, the manufacturer of a safety-related
product can use IEC 61508 to fulfill basic requirements from the European Direc-
tives according to the new concept. For instance in the following cases:
S If there is no harmonized Standard for the application involved. In this particular
case, the manufacturer may use IEC 61508. However, it has no presumption of
conformity.
S A harmonized European Standard (e.g. EN 954 or ISO 13849, EN 60204–1)
makes reference to IEC/EN 61508. This ensures that the appropriate require-
ments of the Directives are complied with ("standard that is also applicable"). If
the manufacturer correctly applies IEC/EN 61508 in the sense of this reference
and acts responsibly, then he uses the presumption of conformity of the refer-
encing standard.
IEC 61508 handles, from a universal basis, all aspects that must be taken into con-
sideration if E/E/PES systems (electrical, electronic and programmable electronic
systems) are used in order to execute safety-related functions and to guarantee
the appropriate level of functional safety. Other hazards, e.g. hazards as a result of
electric shock are – similar to EN 954 – not included in the Standard.
A new aspect of IEC 61508 is its international positioning as "International Basic
Safety Publication", which makes it a framework for other sector-specific Stan-
dards (e.g. IEC 62061). As a result of its international positioning, this Standard
enjoys a high acceptance worldwide – especially in North America and in the Auto-
mobile industry. Today, many regulatory bodies already specify it, e.g. as basis for
NRTL listing.
A new aspect of IEC 61508 is also its system approach. This extends the technical
requirements to the complete safety installation – from the sensor to the actuator –
the quantification of the probability of dangerous failure due to random hardware
failures and the generation of documentation associated with every phase of the
complete safety-related lifecycle of the E/E/PES.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
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03.06