Safety Parameters - Beckhoff EL6900 Operating Instructions Manual

3.4

Safety parameters

Key figures
Lifetime [a]
Prooftest Interval [a]
PFH
D
%SIL3
PFD
%SIL3
MTTF
d
DC
Performance level
Category
HFT
2
Element classification
1. Special proof tests are not required during the entire service life of the EL6900 EtherCAT terminal.
2. Classification according to IEC 61508-2:2010 (see chapters 7.4.4.1.2 and 7.4.4.1.3)
The EL6900 EtherCAT Terminal can be used for safety-related applications within the meaning of
IEC 61508:2010 up to SIL3 and EN ISO 13849-1 up to PL e (Cat4).
For the calculation or estimation of the MTTF
the TwinSAFE application manual or in ISO 13849-1:2015 Table K.1.
EL6900
EL6900
20
not required
1.03E-09
1,03%
8.23E-05
8,23%
high
high
PL e
4
1
Type B
value from the PFH value, further information can be found in
d D
Version: 2.2.0
Product description
1
17