xDS 5000 safety figures
ID 442181.07
26
Operating manual ASP 5001
7
WE KEEP THINGS MOVING
7.2
CCF
The following measures were taken to prevent failures due to common causes:
•
Physical separation between the signal paths (15)
•
Diversity (20)
•
Protection against overvoltage (15)
•
Tests on EMC immunity (25)
•
Tests concerning all relevant ambient conditions (10)
An assessment of these measures resulted in a score of 85. As a result, the minimum requirements are met.
24 hours of operation every day
Cycle time
PFH [1/h]
MTTF
d
[years]
DC = 60 %
DC = 90 %
DC = 60 %
DC = 90 %
1 minute
1,480
10
-8
8,434
10
-9
100
a)
a) MTTF
d
is reduced to 100 years according to DIN EN ISO 13849-1:2008-12.
100
a)
2 minutes
1,044
10
-8
7,244
10
-9
5 minutes
5,198
10
-9
3,905
10
-9
10 minutes
2,606
10
-9
1,954
10
-9
30 minutes
8,701
10
-10
6,517
10
-10
1 hour
4,353
10
-10
3,259
10
-10
2 hours
2,177
10
-10
1,630
10
-10
4 hours
1,088
10
-10
8,148
10
-11
8 hours
5,443
10
-11
4,074
10
-11
16 hours
2,721
10
-11
2,037
10
-11
1 day
1,814
10
-11
1,358
10
-11
2 days
9,072
10
-12
6,790
10
-12
5 days
3,629
10
-12
2,716
10
-12
1 week
2,592
10
-12
1,940
10
-12
2 weeks
1,296
10
-12
9,700
10
-13
1 month
5,965
10
-13
4,465
10
-13
6 months
9,942
10
-14
7,441
10
-14
12 months
4,971
10
-14
3,721
10
-14
