Manual – MOVIDRIVE® MDX61B Safety Module MOVISAFE® DCS..B Option
15
3
Safety architecture of the DCS..B option
Integrated Safety Technology
The examples shown in this manual and their characteristic architecture are decisive for
the assignment to a category according to EN ISO 13849-1. The resulting maximally
possible performance levels according to EN ISO 13849-1 depend on the following
factors of the external components:
• Structure (simple or redundant)
• Measures against common cause failure (CCF)
• Diagnostics coverage (DC
avg
)
• Mean time to failure of a channel (MTTF
d
)
INFORMATION
• When using several sensors with different functions (e.g. position indicator access
door + velocity detection) for a safety function (e.g. safety reduced speed when the
access door is open), then these sensors have to be regarded as series connection
in the safety-related assessment of the overall system. See also BGIA report
02/2008 "Functional Safety of Machine Controls – Application of EN ISO 13849".
• For fault exclusions, refer to the tables under D in the appendix of EN ISO 13849-2.
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