Siemens SIMATIC ET 200M Operating Instructions Manual page 166

Functions
8.4 Redundancy with IM 153-2
Compatible versions
If you use the ET 200M in a redundant configuration, for both IM 153-2s or IM 153-2 FOs
you must use compatible versions.
Compatible versions of the interface module IM 153-2 / IM 153-2 FO can be swapped during
"Module Change During Operation" without switching off the I/O modules.
For more information, refer to the chapter "Arrangement of the modules for the function
"Change During Operation" and / or "Redundancy" (Page 44)".
Note
The functionalities are restricted to those of the respective lower order number or the lower
version.
S7-400H as DP master
You require
configuring the S7-400H system.
DP master 1 and DP master 2:
● work off the same user program.
● have the same configuration and parameterization for the IM 153-2 interface module.
S5-115H / -155H as DP master
If the IM 153-2 interface module is being used on an S5 H system, the you must configure
two DP master systems in the
Voltage supply for the IM 153-2 interface module
In order to ensure availability in redundant mode with 2 x IM 153-2, we recommend that each
IM 153-2 is using its own power supply module.
164
STEP 7
as of V5.0 as well as the software package
COM PROFIBUS
SIMATIC S7 H-systems
.
Operating Instructions, 12/2008, EWA-4NEB780600602-08
for
ET 200M