Siemens SIMATIC S7-1500 Function Manual page 309

Connection resources
11.1 Connection resources of a station
The figure below shows an example of how individual components make connection
resources available to an S7-1500 station.
①
②
Figure 11-1
308
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
Function Manual, 11/2019, A5E03735815-AH
Communication