1.2.5.1 Safety specifications
1.2.5.1.1 System requirements
Required Firmware
v4.2.0 or higher
Supported Hardware
SOMANET Circulo 7
SOMANET Circulo 9
1.2.5.1.2 Technical specifications
Safety parameters
Safety Integration level (SIL) according to IEC
61508:2010
SIL 3
Performance Level (PL) according to ISO 13849-
1:2015
PL e
Reaction time 10 ms
Safety parameters IEC 61508:2010
Probability of dangerous failure per hour (PFH ) 1.59∙10 /hour
Probability of dangerous failure on demand (PFD
)
1.39∙10
Safe Failure Fraction (SFF) 99.95%
Hardware Fault Tolerance (HFT) 1
HW-type Type A
Mission time T 20 a
Supported safety modes High, Low
Safety parameters ISO 13849-1:2015
Category Cat. 3
Mean Time to dangerous Failure (MTTF ) 3319 years (capped to 100 years)
Diagnostic coverage (DC ) 99%
d
-10
avg
-5
M
d
avg