Siemens SINAUT ST7 System Manual page 76

Network structures, configuration examples, installation guidelines
3.3 Installation guidelines and compatible CPUs
Figure 3-20
Direct communication over TIM 4R-IE and other TIM modules
As described above, with a TIM 4R-IE, direct communication is possible between all stations
on all networks connected to the TIM. If there are other TIM modules on Ethernet or on the
MPI bus in addition to the TIM 4R-IE, direct communication can also be extended to the
networks of the other TIMs.
The first example shows the path of direct communication between stations connected to a
standalone TIM 4R-IE and a TIM 3V-IE. The two TIMs are interconnected over Ethernet.
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TIM 4R-IE in a master station or node station, redundant connection to subsidiary
station; one path as dedicated line, the second over GPRS and Internet
SINAUT ST7 - Volume 1
System Manual, 11/2018, C79000-G8976-C178-12