Siemens simovert masterdrives Compendium

12.2010 Configuration and Connection Examples
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES Compendium Motion Control 2-53
♦ Determination of MTTF
d
value
Parameter Value Comment
Channel 1
Safety relay –K1
B10
d
value 20.000.000 Specified by manufacturer
nop 24972 per year
24960 per year due to protective door
+ 12 per year due to Emergency Stop
MTTF
d
(-K1) 8008 years
op
d
d
n1,0
10B
MTTF
×
=
Interim result channel 1
MTTF
d
(channel1)
8008 years
Capped to 100 years
Channel 2
Line contactor –K2
B10
d
value 1.333.333 Specified by manufacturer
nop 12 per year 12 actuations per year due to Emergency Stop
MTTF
d
(-K2) 1,111,111 years
op
d
d
n1,0
10B
MTTF
×
=
Interim result Channel 2
MTTF
d
(channel2)
1,111,111 years
Capped to 100 years
Interim results for REACT (channels 1 and 2)
MTTF
d
(REACT)
100 years
→
High
MTTF
d
values of both channels have been
capped to 100 years →
It is not necessary to symmetrize both
channels.

Siemens simovert masterdrives Specifications

General

Brand	Siemens
Model	simovert masterdrives
Category	DC Drives
Language	English