Application Note for “Usage of AC500 digital standard I/Os in functional safety applications up to PL c (ISO 13849-1)”, V1.0.0
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2015 ABB Ltd.
4.
Environmental (Other influences - shock, vibration and temperature), refer
to CE declaration type test report for a given AC500 product –
10 points
Total sum of points:
65 points
As a result, according to ISO 13849-1, CCF requirements for usage of AC500 products
are fulfilled because 65 points are needed for this based on Annex F, ISO 13849-1.
DANGER
A physical separation of signal lines for AC500 standard input chan-
nels have to be considered on the application level as well. Thus,
the responsibility for this part remains fully within the end-customer
responsibility.
3.4.3
Systematic failures
Measures for the control and avoidance of systematic failures from Annex G, ISO
13849-1 shall be considered for standard (non-safety) AC500 components separately
(all these measures are already covered for AC500-S Safety PLC modules like SM560-
S and DX581-S, which are certified for up to PL e (ISO 13849-1) and SIL CL 3 (IEC
62061) safety applications). The AC500 product requirements for the control and
avoidance of systematic failure in PL c (ISO 13849-1) applications are satisfactorily
covered in the proposed implementation (refer to the system setup in Figure 5) through
ABB AC500 product development model:
- Usage of Integrated Management System which is ISO 9001 certified by exter-
nal certification body
- Quality guidelines for software development
- Hardware development process including hardware quality statistics for at least
last 3 years
- Continuous analysis of all critical bug entries in the bug tracking system
All used AC500 modules have CE declaration (European Conformity) available which
means that they satisfy Low Voltage Directive 2006/95/EG, EMC Directive
2004/108/EG and IEC 61131-2:2007 standard requirements in addition to various
other standards (refer to
www.abb.com/PLC
for details).
DANGER
If standard (non-safety) modules are used for safety functions, one
still have to perform a systematic failure analysis (refer to Annex G,
ISO 13849-1) on the application level for the application part in
which standard (non-safety) modules are used.
