Application

Isolation module must be used

Central use after CPU 31xF-2 DP or CPU 31xF-2 PN/DP

• Only fail-safe modules in the tier

Yes, behind the CPU

• Standard and fail-safe modules in the tier

Yes, after the last standard module and before the first fail-safe module

Central use after CPU 31xF-2 DP or CPU 31xF-2 PN/DP in an expansion rack

• Only fail-safe modules in the tier

Yes, after the IM 36x

• Standard and fail-safe modules in the tier

Yes, after the last standard module and before the first fail-safe module

Distributed behind the IM 153-2 with copper connection

• Only fail-safe modules in the station

Yes, after the IM 153-2

• Standard and fail-safe modules in the station

Yes, after the last standard module and before the first fail-safe module

Distributed behind the IM 153-2 with fiber-optic connection

• Only fail-safe modules in the station

No

• Standard and fail-safe modules in the station

Yes, after the last standard module and before the first fail-safe module