BECKHOFF TwinSAFE - Manual (Page 73)

Circuit examples
Application Guide TwinSAFE 71
Restart:
݊
௢௣
ൌ
230 כ 16 כ 60
15
ൌ 14720
ܯܶܶܨ
ௗ
ൌ
10000000
0.1 כ 14720
ൌ 6793.5y ൌ 59511060h
Tumbler:
݊
௢௣
ൌ
230 כ 16 כ 60
15
ൌ 14720
ܯܶܶܨ
ௗ
ൌ
2000000
0.1 כ 14720
ൌ 1358.7y ൌ 11902173h
and the assumption that S1, S2, S3, S4, K1, K2 and the tumbler are in each case single-channel:
ܯܶܶܨ
ௗ
ൌ
1
ߣ
ௗ
results in a
ܲܨܪ ൌ
0.1 כ ݊
௢௣
כ ሺ1 െ ܦܥሻ
ܤ10
ௗ
ൌ
1 െ DC
MTTF
ୢ
S1:
ܲܨܪ ൌ
1 െ 0.90
1358.7 כ 8760
ൌ 8.40E െ 09
S2:
ܲܨܪ ൌ
1 െ 0.99
1358.7 כ 8760
ൌ 8.40E െ 10
Lock/Unlock:
ܲܨܪ ൌ
1 െ 0.99
67.9 כ 8760
ൌ 1.68E െ 08
Restart:
ܲܨܪ ൌ
1 െ 0.90
6793.5 כ 8760
ൌ 1.68E െ 09
K1/K2:
ܲܨܪ ൌ
1 െ 0.99
883.2 כ 8760
ൌ 1.29E െ 09
Tumbler:
ܲܨܪ ൌ
1 െ 0.99
1358.7 כ 8760
ൌ 8.40E െ 10