Pepperl+Fuchs VAS-2A1L-K31, Manual

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Subject to reasonable modifications due to technical advances. © Fuchs, Printed in Germany
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AS-Interface
Spezifications
4.3 Safety-relevant characteristic data
4.3.1 Overview of parameter for determining the failure rates
Characteristic data Value Standard
Safety category 4 EN 954-1
Safety category 4 EN ISO 13849-1: 2008
Performance Level (PL) e
Safety Integrity Level (SIL) 3 EN 61508
Lifespan (TM) in years 20 EN ISO 13849-1: 2008
Maximum switch-on time in months 12 EN 61508
Max. system reaction time in
milliseconds 40 EN 61508
Tab. 4-2.
Attention!
In addition to the system reaction time of max. 40 ms, the reaction times of the safe AS-
interface sensor slave, of the sensor being used for monitoring, of the safe AS-interface
actuator slave and of the actuator used for this purpose must still be added. Please note
that additional reaction times may likewise arise through the configuration of the safety
monitor.
Notice!
Refer to the technical data for the slaves as well as to that for the sensors and actuators
for the reaction times to be added.
Attention!
The system reaction times of the daisy-chained AS-interface components are added up.
nop/y switching intervals
t
cycle
[s]
B10d
value electromechanics Standard
MTTF
d
[years] PFH [1/h]
105.120 300 2.500.000 237,82
9,908 x 10
-9
EN ISO
13849-1
52.560 600 475,65
4,853 x 10
-9
8.760 3600 2853,88
9,054 x 10
-10
Tab. 4-3.
nop/y switching
intervals
t
cycle
B10d
value electronics
PFH electromechanics PFH
total Standard
MTTF
d
PFH
105.120 300 2.500.000
4,76 E
-09 237,82
1,12 x 10
-8
1,6 x 10
-8 EN 62061
EN 61508
52.560 600 475,65
5,09 x 10
-9
9,85 x 10
-9
8.760 3600 2853,88
7,82 x 10
-10
5,54 x 10
-9
Tab. 4-4.