Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 372

02.12
05.01
Determining DC
Table 9-19
DC (channel 1)
DC (channel 2)
DC
Determining the
Performance Level
S
S
S
S
Acc. to EN ISO 13849–1:2008 Annex K, PLe mit PFH
attained.
Measures against common cause failures CCF of the
safety function
According to EN ISO 13849–1 Annex F, for SRP/CS from Category 2, a mini-
mum of 65 points is required.
The considerations according to Chapter 9.4.1 Table 9-9.
This means that in total, the adequate number of 65 points is reached.
Checking the PFH value of the complete safety func-
tion
Table 9-20
SENSE
EVALUATE
RESPOND
Total
As a consequence, the requirements regarding PLd with Category 3 for the pro-
tective door safety function are fulfilled.
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Determining the diagnostic coverage level (DC)
Parameter Value
99 %
99 %
99 % → high
avg
Structure of the SRP/CS corresponding to Category 3
MTTF is high
d
DC is high
avg
sufficient measures against common cause failures
PFH value of the complete safety function
Parameter PFH value
-8
4,29 x 10 / h
-11
3 x 5,4 x 10 / h
-8
4,29 x 10 / h
-8
8,6 x 10 / h
9 Cabinet Design and EMC
9.4 Application examples
Comment
Testing –K1 via –K3 in the feedback circuit of
–A1
Testing –K2 in the feedback circuit of –A1 when
EMERGENCY STOP is requested
DC = DC (channel 1) = DC (channel 2)
avg
= 4,29 x 10
d
PL Comment
e EMERGENCY STOP pushbutton –S3
e Safety relays –A1, –A2 and –A3
e Switching elements –K1 and –K2, –K6 and
–K5
-6
e <1 x 10 / h
-8
/ h is
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9