Siemens Simatic 6ES7 157-0AD81-0 A0 Series

Commissioning the DP/PA Link
6-4
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Example of the configuration of a DP/PA link for redundant operation
Figure 6-1 HW Config: DP/PA link in hardware catalog
Figure 6-2 HW Config: Minimum configuration of an S7-400H with a DP/PA link