Product description
EL6910 13Version: 1.4.1
3.4 Safety parameters
Key figures EL6910
Lifetime [a] 20
Prooftest Interval [a] not required 1)
PFH
D
1.79E-09
%SIL3 of PFH
D
1,79%
PFD
avg
2.54E-05
%SIL3 of PFD
avg
2,54%
MTTF
d
high
DC high
Performance Level PL e
Category 4
HFT 1
Element classification* Type B
1. Special proof tests are not required during the entire service life of the EL6910 EtherCAT terminal.
2. Classification according to IEC 61508-2:2010 (see chapters 7.4.4.1.2 and 7.4.4.1.3)
The EL6910 EtherCAT Terminal can be used for safety-related applications according to IEC62061 and
IEC61508:2010 up to SIL3 and DINENISO13849-1:2016-06 up to PLe(Cat4).
For the calculation or estimation of the MTTF
d
value from the PFH
D
value, further information can be found in
the TwinSAFE application manual or in DIN EN ISO 13849-1:2016-06 Table K.1.
In terms of safety-related parameters, the Safety over EtherCAT communication is already considered with
1% of SIL3 according to the protocol specification.
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