Installing The Dp/Pa Link For Redundant Operation; Typical Configuration Of The Dp/Pa Link For Redundancy Operation - Siemens Simatic 6ES7 157-0AD81-0 A0 Series Manual

Installation
3.4

Installing the DP/PA link for redundant operation

Configuration with bus modules
For redundant operation, the DP/PA link must configured with bus modules.
Required components
S Rail for configuration with active bus modules ("Rail for module change during
operation")
S 2 x IM 157
S BM IM/IM bus module
S 1 to 5 x DP/PA coupler
S One BM DP/PA coupler bus module for each DP/PA coupler
You can find the order numbers for these components in Appendix D.
Typical configuration
The figure below shows the typical configuration of a DP/PA link for redundant
operation with two power supply modules. The front doors are open.
PS 307 PS 307
Rail
Figure 3-2

Typical configuration of the DP/PA link for redundancy operation

3-6
IM 157 IM 157 DP/PA coupler
BM IM/IM BM DP/PA coupler
(not visible) (not visible)
DP/PA Link and Y Link Bus Couplings
A5E00193841-01 1