Siemens Simatic PCS 7 Function Manual page 143

Procedure
1. Configure redundant modules for HART field devices in HW Config as described in section
"How to configure redundant input/output modules (PROFIBUS DP) (Page 136)".
In the example, the module on slot 6 is configured in each case:
– ET 200M station with PROFIBUS address 4: Module 6
– ET 200M station with PROFIBUS address 6: Module 6
In the following example,the module on slot 2 and 3 is configured for ET 200SP HA:
2. Place the "HART field device" in the detail view of the redundant module.
In the example, module 6 on ET 200M station with PROFIBUS address 4.
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA
Advantages of high availability components
5.4 Distributed I/O
143