Beckhoff EK1960 Series, Operating Instructions Manual

Page: 26 / 145

Product description
EK1960 26 Version: 1.3.1
Logic parameters Value
PFH
D
5.18 E-09
PFD
G
4.32 E-05
MTTF
D
high
DC
avg
high
Performance Level PL e
Category 4
SIL 3
Output safety parameters
The following table contains the safety parameters for the digital output of the EK1960. This must be added
to the input and logic value to determine the total PFH value.
Digital output parameters Value
PFH
D
1.5 E-10
PFD
G
2.62 E-07
MTTF
D
high
DC
avg
high
Performance Level PL e
Category 4
SIL 3
Examples of safety loops
Characteristic numbers Sample 1 Sample 2 Sample 3 Sample 4
Safety mat input PLd, Cat. 2 8.48 E-10 8.48 E-10 8.48 E-10 8.48 E-10
Digital input PLe, Cat. 4 6.4 E-11 6.4 E-11
Logic PLe, Cat. 4 5.18 E-09 5.18 E-09 5.18 E-09 5.18 E-09 5.18 E-09
Digital output PLe, Cat. 4 1.5 E-10 1.5 E-10 1.5 E-10
Relay output
(Cat. 4) PLe, Cat. 4 1.46 E-09 1.46 E-09
Relay output
(Cat. 2) PLd, Cat. 2 7.25 E-10 7.25 E-10
Overall result
PFH
D
/ Performance
Level / Category
6.18 E-09
PLd, Cat. 2 5.39 E-09
PLe, Cat. 4 7.49 E-09
PLd, Cat. 2 6.75 E-09
PLd, Cat. 2
3.8 Error response times
The error response times depend, among other things, on the logic program used and the settings of the
MultiplierDiagTestPulse and ModuloDiagTestPulse parameters.
An error reaction for the tests of the I/O signals is realized by a weighted counter, therefore the switch-off
does not occur immediately at the first error of the diagnostic tests.
The maximum error reaction time results from the duration of the longest lasting test, this is the RAM test
and this is several hours.