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Product description
AX8911
17
Version: 1.2.0
Further information on calculating or estimating the MTTF
D
value from the PFH
D
value can be found in the
TwinSAFE Application Guide or in EN ISO 13849-1:2015, 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.
Safety Function SBC
Characteristic numbers
AX8911 - SBC
Lifetime [a]
20
Proof test interval [a]
not required
1)
PFH
D
5.60E-09
PFD
avg
2.70E-04
MTTF
D
high
DC
high, 99.5%
SFF
>99%
Performance level
PL e
Category
4
HFT
1
Classification element
2)
Type B
1)
Special proof tests are not required during the entire service life of the AX8911 TwinSAFE Drive Option
card.
2)
Classification according to IEC 61508-2:2010 (see chapters 7.4.4.1.2 and 7.4.4.1.3)
The AX8911 TwinSAFE Drive Option Card with the safety function SBC can be used for fail-safe applications
within the meaning of IEC 61508:2010 up SIL 3, EN 62061:2005/A1:2013/A2:2015 up to SILCL3 and
EN ISO 13849-1:2015 up to PL e (Cat.4).
Further information on calculating or estimating the MTTF
D
value from the PFH
D
value can be found in the
TwinSAFE Application Guide or in EN ISO 13849-1:2015, 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.
Safe Motion functions - proportion of the logic components when using an external encoder
If an external encoder is used, the total PFH
D
and total MTTF
D
must be determined from the combination of
AX8911 - AX8xxx-x2xx and external encoder. The following table shows the proportion AX8911 - AX8xxx-
x2xx.
Characteristic numbers
AX8911 - AX8xxx-x2xx
Lifetime [a]
20
Proof test interval [a]
Not necessary in High Demand mode.
Proof tests within the lifetime are necessary in Low Demand mode.
PFH
D
4.80E-09
PFD
avg
2.20E-04
MTTF
D
high
DC
high, 99.4%
SFF
>99%
Performance level
PL e
Category
4
HFT
1
Classification element
1)
Type B
1)
Classification according to IEC 61508-2:2010 (see chapters 7.4.4.1.2 and 7.4.4.1.3)
Содержание AX8911
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Страница 25: ...Operation AX8911 25 Version 1 2 0 Fig 6 Projects with outputs to the AX8911...
Страница 63: ...Appendix AX8911 63 Version 1 2 0 12 2 Certificates...
Страница 64: ...Appendix AX8911 64 Version 1 2 0...