Siemens SIMATIC CP 340 User Manual page 13

The CP 340 can also be operated in a distributed configuration using the ET 200M (IM153)
I/O device.
Note
The CP 340 modules (6ES7 340-1xH0y-0AE0) cannot be operated downstream from the
external communication CPs CP 342-5 (PROFIBUS DP) and CP 343-1 (PROFINET IO).
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03
Product Description
1.1 Uses of the CP 340
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