Siemens SIMATIC ET 200AL System Manual page 913

The figure below shows an example of how individual components make connection
resources available to an S7-1500 station.
①
②
Figure 11-1
Communication
Function Manual, 12/2017, A5E03735815-AF
Available connection resources of the station, of which
A Reserved connection resources of the station
A + B Connection resources of CPU 1518
C Connection resources of communications module CM 1542-1
D Connection resources of communications processor CP 1543-1
Maximum communications resources of the station using the example of a configuration from
CPU 1518, CM 1542-1 and CP 1543-1
Connection resources of a station
Connection resources
11.1 Connection resources of a station
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