Siemens SIMATIC PCS 7 Function Manual page 123

Procedure
Configure the DP/PA Link as described in the section "How to configure the Y Link
(Page 119)".
The DP/PA Coupler does not appear in the hardware catalog for the configuration of the bus
system.
When configuring in HW Config, you only need to set the transmission speed for the selected
PROFIBUS DP network in the "Network Settings" tab of the "Properties PROFIBUS dialog box.
Result
The following figure shows the configuration in HW Config with the "PCS7_V70" library
as an example:
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02
Advantages of fault-tolerant components
4.4 Distributed I/O
123