Siemens Simatic RTU303xC Series Operating Instructions Manual page 42

Application and functions
1.10 Scope of delivery, accessories, requirements
When using the DNP3 or IEC protocol
● Master station
– PC with accessories
– The relevant master application
– Security module SCALANCE S
● OpenVPN server
To use the DNP3 and IEC protocols, you should use the OpenVPN protocol. You require:
– An OpenVPN server or SINEMA RC, see section Security functions for
– The CA certificate of the server
– The configuration of the client on the OpenVPN server
Importing the files for authentication of the RTU is described in the section VPN
(Page 151).
Accessories for mobile wireless communication
The following accessories are necessary if the RTU communicates with a master station
using mobile wireless, if data of the station is to be sent by SMS or e-mail or if the RTU is to
synchronize its time of day via the mobile wireless network (also via NTP).
● Antenna
Only use antennas from the accessories program for the RTU, refer to the section
Antennas and accessories (Page 363).
● Cabinet feedthrough for the antenna and flexible connecting cable for the protective
housing
See appendix Antenna accessories, screw connections (Page 365).
42
communication (Page 32).
Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC