Siemens Simovert Masterdrives Compendium page 82

Configuration and Connection Examples
Parameter
DC(channel1)
DC(channel2)
DC
avg
Measures against
common cause
failure (CCF) of the
safety function
Check of the PFH
value of the safety
functions as a whole
Parameter PFH value
ACQUIRE 4.29 x 10
EVALUATE 3 x 5.4 x 10
REACT 4.29 x 10
Total 8.6 x 10
2-54
♦ Determination of diagnostic coverage
Value
99 %
99 %
99 % → High
♦ Determination of Performance Level
•
Structure of SRP/CS according to Category 3
•
MTTF is high
d
•
DC is high
avg
•
Sufficient measures against common cause failure
According to EN ISO 13849-1:2008 Appendix K, PL e is achieved
with PFHd = 4.29 x 10
In accordance with ISO 13849-1, a minimum of 65 points are required
for SRP/CS from category 2.
The observations stated in subsection 2.4.5.2 "Measures against
common cause failure (CCF) of the safety function" apply.
A sufficient total of 65 points is thus achieved.
PL
-8
/ h e
-11
/ h e
-8
/ h e
-8
/ h e
The requirements regarding PL d with Category 3 for the
protective door safety function are thus fulfilled.
Comment
Testing of -K1 via –K3 in feedback circuit of
–A1
Testing of -K2 in feedback circuit of –A1 on
Emergency Stop request
=
DC DC ( channel
avg
-8
/ h.
Comment
Emergency Stop button –S3
Safety switching devices –A1, –A2 and –A3
Switching elements –K1 and –K2
-6
< 1x10 / h
6SE7087-6QX70 (Version AM)
Compendium Motion Control
12.2010
=
) 1 DC ( channel ) 2
Siemens AG
SIMOVERT MASTERDRIVES