Altivar Process ATV680 - Page 24

24 EAV64334 06/2017
Summary Of The Reliability Study For Drive Systems Options
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.
Standard Input ATV660 / ATV680 With Option
VW3 AP 1502 VW3 AP 1503 ETO
IEC 61508 Ed.2 PFH in /h
5 x 10
-8
5 x 10
-8
2 x 10
-6
PFD
2 x 10
-6
4 x 10
-4
4 x 10
-5
Type AAA
HFT 110
T1 (proof test interval) in hours 8760 8760 8760
SIL capability 3 3 1
IEC 62061 SIL CL capability 3 3 1
ISO 13849-1 (1) PL e e c
Category 3 3 1
MTTFd in years > 100 (high) > 100 (high) > 100 (high)
DC avg > 90% (Medium) > 90% (Medium) 0%
(1) According to table 4 of EN 13849-1 (2008)