Abbreviations And Symbols - Eaton CMD Handbuch

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0.3 Abbreviations and symbols

0.3 Abbreviations and symbols
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Symbols used in this manual have the following meanings:
IFA Institute for Occupational Safety and Health (BGIA)
SIL Safety Integrated Level
PL Performance Level
CCF Common cause failure
DC Average diagnostic coverage
avg
MTTF Mean time to dangerous failure
D
B Lifespan up to a dangerous failure
10D
n Mean number of annual switch operations
op
LED LED
CMD(220-240VAC), CMDB 01/20 MN121002ZU-DE/EN www.eaton.com