Siemens Simatic RTU303xC Series Operating Instructions Manual page 18

Application and functions
1.2 Configuration examples
Telecontrol with the "TeleControl Basic" protocol
In the following example the RTU uses the "TeleControl Basic" protocol and communicates
via the mobile wireless network and the Internet with the teleconrol server (TCSB) in the
master station.
Using its integrated OPC server, the telecontrol server exchanges data with the OPC client
of the control center.
Figure 1-2
Telecontrol with the "ST7" protocol
In the following example the RTU communicates using the telecontrol protocol SINAUT ST7.
For secure communication, the RTU uses the transport protocol "MSCsec".
The figure contains two alternative connections:
● RTU3010C with connection via the Internet
● RTU3030C with connection via mobile wireless
It would also be possible to connect via LAN, only via the Internet or via an additional
underlying OpenVPN tunnel.
18
Communication of the RTU and other station types with a master station
Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC