Altivar Process ATV630 Function Manual page 24

Summary Of The Reliability Study For Drive Systems Options
Standard
IEC 61508 Ed.2
IEC 62061
ISO 13849-1 (1)
(1) According to table 4 of EN 13849-1 (2008)
Preventive annual activation of the safety function is recommended.
However, the safety levels can be obtained (with lower margins) without annual activation.
For the machine environment, a safety module is required for the STO function.
NOTE: The table above is not sufficient to evaluate the PL of a PDS. The PL evaluation has to be done at
the system level. The system integrator has to evaluate the random integrity as well as the systematic
integrity at system level according to IEC61508, IEC 62061, ISO13849 or applicable product standard.
24
Input
PFH in /h
PFD
Type
HFT
T1 (proof test interval) in hours
SIL capability
SIL CL capability
PL
Category
MTTFd in years
DC avg
ATV660 / ATV680 With Option
VW3 AP 1502 VW3 AP 1503
-8 -8
5 x 10 5 x 10
-6 -4
2 x 10 4 x 10
A A
1 1
8760 8760
3 3
3 3
e e
3 3
> 100 (high) > 100 (high)
> 90% (Medium) > 90% (Medium)
ETO
-6
2 x 10
-5
4 x 10
A
0
8760
1
1
c
1
> 100 (high)
0%
EAV64334 06/2017