Siemens SIMATIC PCS 7 - Page 66

Encrypted communication
"Encrypted communication" is not approved for stations with SIMATIC NET SOFTNET‑IE RNA.
Note
It does not apply for WinCC/SCS secure communication.
Availability - redundant high availability terminal bus
The entire transmission route can be configured redundantly. A transmission route remains
operational for communication on the terminal bus if any of the network components fails.
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Connecting non-redundant networks and components
An integrated solution of network components and protection devices can be implemented for
a substation or process application using PRP-compatible SCALANCE X products. Connect
components having only one network connection to the redundant, high availability terminal
bus using the SCALANCE X204RNA . Select this connection for infrastructure components,
for example:
● Central plant clock (e.g. SICLOCK TC400)
● Domain controllers (DCs), DNS, WINS, DHCP, WSUS
● WLAN access point
● File server
High availability solutions in PCS 7
4.3 Solutions for communication
High Availability Process Control Systems (V9.0)
66 Function Manual, 05/2017, A5E39221836-AA