1.3.2.6.2 Specifications of the safety functions
1.3.2.6.2.1 System requirements
Required Firmware
v4.2.0 or higher
Supported Hardware
SOMANET Node 2000 Safety (E revision or newer) *
SOMANET Node 1000 Safety (E revision or newer)
SOMANET Node 400 Safety (E revision or newer)
* External fuse at main supply (48 VDC) is required for Node 2000 Safety dimensioned according to driven
load.
1.3.2.6.2.2 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 cat. 3
Safe Failure Fraction (SFF) 99.99 %
Probability of dangerous failure per hour (PFH ) 1.07∙10 /hour
Probability of dangerous failure on demand (PFD ) 9.41∙10
Common Cause Failure (CCF) >65
Hardware Fault Tolerance (HFT) 1
Reaction time 10 ms
De-activation time 10 ms
Mean Time to dangerous Failure (MTTF ) 3035 years (capped to 100 years)
Diagnostic coverage (DC ) 99%
HW-type Type A
Mission time T 20 a
Supported safety modes High, Low
d
-10
avg
-6
d
avg
M
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