SIGMATEK SRO 021, Руководство пользователя

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S-DIAS SAFETY RELAY OUTPUT MODULE SRO 021
02.12.2019 Page 11
2.3 Safety-Relevant Parameters
Relay Module Safety Parameters Safety Levels
SRO 021 including CPU module
SCP 011/SCP 111
PFH
D
= 9.78E-09 (1/h)
MTTF
D
= 240 years
DC = 98.99 %
SFF = 99.49 %
PL e / Cat. 4
SIL 3 resp. SILCL 3
The above failure probability (PFH
D
, MTTF
D
and SFF)) is based on the assumption that the
output relay is operated with 25,000 switching cycles per year (nop). If more switching
cycles per year are required, you can request the safety parameters from SIGMATEK via
the support.
Time of use of the relay output module depending on the
number of switching cycles per year, see chapter 3.2.
2.4 Compatibility
Compatibility For compatibility of the S-DIAS Safety modules, see section
"Compatibility of S-DIAS Safety Modules" in the system
handbook.