8.1.3 Requirements and Standards
The following parameters are achieved according to the safety case:
▶ according to DIN EN ISO 13849-1:2008-12
– MTTFd: >100 years
– DC = 99%
– Category 4
– Performance Level e
▶ according to EN 61508-1:2010 and EN 61800-5-2:2014-06
– PFH = 0
– SFF = 100 % (if there are PFH values, then SFF<100%)
– HFT = 0
The safety concept K2 meets the requirements of SIL 3 according to the standards
named above.
Requirements according to DIN EN 61800-5-2:2014-06
When connected appropriately, the safety concept K2 does not supply any share of dan-
gerous, undetected errors in the safety chain for the function STO.
Thus the stop function 0+1 according to DIN EN 60204-1 is realized.
53Drive Amplifier SD4B - Hardware Description
Functional Safety
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