BECKHOFF KL1904 - Manual (Page 17)

Product description
KL1904 15
3.4 Safety parameters
Key figures KL1904
Lifetime [a] 20
Prooftest Interval [a] not required 1)
PFH 2.30E-09
%SIL3 2.3%
PFD 1.81E-04
%SIL3 18.1%
MTTFd [a]
>100
DC >99%
Performance level
PL e
Category 4
HFT 1
Element classification
2) Type A
1) Special proof tests are not required during the entire service life of the KL1904 Bus Terminal.
2) Classification according to IEC 61508-2:2010 (see chapters 7.4.4.1.2 and 7.4.4.1.3)
The KL1904 Bus 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).