Safety Parameters - Beckhoff EK1914 Operating Manual

5.4

Safety parameters

Safety parameters
Lifetime
Prooftest-Intervall
PFH
D
%SIL3
PFD
%SIL3
MTTF
D
DC
SFF
Performance Level
Category
HFT
Element classification
The TwinSAFE Bus Coupler can be used for safety-related applications within the meaning of EN ISO
13849-1 up to PL e (Cat4).
To calculate or estimate the MTTFd value out of the PFHD value please refer to the Application Guide
TwinSAFE or to the ISO 13849-1:2015 table K.1.
EK1914
20 a
/
2,64E-09
2,64%
3,92E-05
3,92%
High
High
>99 %
e
4
1
Typ B
Version: 2.0.0
Product description
Comment
Special proof tests during the entire
service life of the TwinSAFE Bus
Coupler are not required.
According to EN 61508-2:2010
chapter 7.4.4.1.2 and 7.4.4.1.3.
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