Siemens Simovert Masterdrives Compendium page 81

12.2010
Parameter
Channel 1
Safety relay –K1
B10 value
d
nop
MTTF (-K1)
d
Interim result channel 1
MTTF (channel1)
d
Channel 2
Line contactor –K2
B10 value
d
nop
MTTF (-K2)
d
Interim result Channel 2
MTTF (channel2)
d
Interim results for REACT (channels 1 and 2)
MTTF (REACT)
d
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
♦ Determination of MTTF
Value
20.000.000
24972 per year
8008 years
8008 years
Capped to 100 years
1.333.333
12 per year
1,111,111 years
1,111,111 years
Capped to 100 years
100 years
→ High
Compendium Motion Control
Configuration and Connection Examples
value
d
Comment
Specified by manufacturer
24960 per year due to protective door
+ 12 per year due to Emergency Stop
B 10
d
=
MTTF
d
0 1 , × n
op
Specified by manufacturer
12 actuations per year due to Emergency Stop
B 10
d
MTTF =
d
×
0 1 , n
op
MTTF values of both channels have been
d
capped to 100 years →
It is not necessary to symmetrize both
channels.
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