Siemens SIMATIC ET 200S Hardware Installation And Operating Manual page 114

Required safety
class?
AK4/SIL 2/Cat.3 AK 6/SIL3/Cat.3
Use cases 1 to 3
1
See case
See cases
1
2.1
2.2
2.3
AK6/SIL3/Cat.4
2 3
See cases
3.1
3.2