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4.4
Safety parameters
Characteristic numbers
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 KL6904 Bus Terminal.
2. Classification according to IEC 61508-2:2010 (chapter 7.4.4.1.2 and 7.4.4.1.3)
The KL6904 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).
For the calculation or estimation of the MTTF
the TwinSAFE Application Guide or in ISO 13849-1:2015 Table K.1.
4.5
Dimensions
Fig. 5: Dimensions of the KL6904
Width: 24 mm (side-by-side installation)
Height: 100 mm
Depth: 68 mm
KL6904
KL6904
20
1
not required
1.73E-09
1,7%
1.42E-04
14,2%
High
High
PL e
4
1
Type B
value from the PFH
value, further information can be found in
d
D
Version: 3.0.0
Product description
23
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