Pren/Iso 13849-1 (Revision From En 954-1) - Siemens SINUMERIK 840D sl Function Manual

03.06
Systems to execute safety-re-
lated control functions
A Non-electrical (e.g. hydraulic,
pneumatic)
B Electromechanical (e.g. relay
and/or basic electronics)
C Complex electronics (e.g. pro-
grammable electronics)
D A combined with B
E C combined with B
F C combined with A or
C combined with A and B
"X" indicates that the point is covered by this Standard.
Comment 1:
Designated architectures are described in Annex B of EN ISO 13849–1 and provide a simplified basis for
the quantification
Comment 2:
For complex electronics: Using designated architectures in compliance with prEN ISO 13849–1 (rev) up
to PL = d or every architecture in compliance with EN IEC 62061
Comment 3:
For non-electrical systems: Use parts/components, that correspond to EN ISO 13849–1 (rev) as subsys-
tems
1.2.4 prEN/ISO 13849–1 (revision from EN 954–1)
The qualitative approach acc. to EN 954–1 is not sufficient for state-of-the-art con-
trols as a result of their technology. EN 954–1 does not take into account, among
other things, time behavior (e.g. test interval and/or cyclic test, lifetime). This re-
sults in the probabilistic basis in EN ISO 13849–1 (probability of failure per unit
time).
EN ISO 13849–1 is based on the known categories of EN 954–1. It now takes into
consideration complete safety functions with all of the devices involved in their exe-
cution. With EN ISO 13849–1, safety functions are investigated from a quantitative
perspective going beyond the qualitative basis of EN 954–1. Performance levels
(PL) are used, for this purpose, based on the various Categories. The following
safety-related characteristic quantities are required for devices/equipment:
S Category (structural requirement)
S PL: Performance Level
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
EN ISO 13849–1 (rev)
X
Restricted to the designated ar-
chitectures (see comment 1)
and maximum, up to PL = e
Restricted to the designated ar-
chitectures (see comment 1)
and maximum, up to PL = d
Restricted to the designated ar-
chitectures (see comment 1)
and maximum, up to PL = e
Restricted to the designated ar-
chitectures (see comment 1)
and maximum, up to PL = d
X
See comment 2
Regulations and Standards
1.2 Safety of machinery in Europe
EN IEC 62061
No covered
All architectures and maximum,
up to SIL 3
All architectures and maximum,
up to SIL 3
X
See comment 3
All architectures and maximum,
up to SIL 3
X
See comment 3
1-21