Siemens Simatic RTU303xC Series Operating Instructions Manual page 27

● DNP3
The RTU functions as a DNP3 station (Outstation).
Communication is based on the DNP3 SPECIFICATION Version 2.x (2007/2009).
The RTU is certified for the DNP3 conformity levels Level 1 and 2, but also supports
higher conformity levels.
For secure communication with the master, the connection can be established via a VPN
tunnel, see section Security functions for communication (Page 32).
According to the specification "Supplement to Volume 2 - SECURE AUTHENTICATION",
the RTU supports secure authentication, see section DNP3 (Page 220).
You will find a detailed overview of the attributes and properties specified in the DNP3
protocol and supported by the RTU in the DNP3 device profile, see /2/ (Page 388).
You can find the supported object groups and variations in the section Data points
(Page 230).
Communications partners (DNP3 masters) of the RTU can be:
– SIMATIC PCS 7 TeleControl
– SIMATIC WinCC TeleControl
– A TIM module with DNP3 capability (TIM 3V IE DNP3 / TIM 4R IE DNP3)
– Third-party systems that support the DNP3 specification named above.
● IEC 60870-5
The RTU functions as a substation (slave).
Communication is based on the specification IEC 60870-5 Part 104 (2006).
Communications partners of the RTU can be all master systems that support the
specification named above.
For secure communication with the master, the connection can be established via a VPN
tunnel, see section Security functions for communication (Page 32).
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
NOTICE
Securing communication
• When using the LAN interface, select suitable means to make sure that there is
secure communication with the master, for example by using SCALANCE M routers.
• For direct use of the WAN interface without an underlying VPN connection, make
sure that the mobile wireless network is protected against access by third parties,
e.g. by using a private APN.
For the manual of the TIM module see /8/ (Page 389).
Application and functions
1.6 Communications services
27