The following types of RTU are suitable as outstations in telecontrol applications with the DNP3 telecontrol protocol:
- SIMATIC S7‑300/S7‑300F controller (up to approx. 100 I/Os)
- SIMATIC S7‑400/S7‑400F controller (up to approx. 500 I/Os)
- SIMATIC S7‑400H/S7‑400FH controller (up to approx. 500 I/Os)
- Third-party RTUs
Further hardware and software components from the Catalog IK PI round off the Siemens product range for configuration of DNP3 telecontrol applications:
- TIM communication modules
- TCP/IP converters – serial and MD modem modules
- Mobile radio components
- Industrial Ethernet switches, TCP/IP routers, and media converters
- SCALANCE W Industrial Wireless LAN components
- SCALANCE S612 and S613 industrial security modules
- Dedicated line accessories
- Cables
- Engineering package for configuration of DNP3 data objects, stations, networks and connections as well as for diagnostics
Network topologies
In order to configure complete, hierarchical telecontrol networks, it is possible to configure basic topology forms such as point-to-point, multipoint, star or ring in various media versions and to combine them depending on the infrastructure requirements.
Examples of media versions
- Private networks:
- Wireless
- Dedicated line
- WLAN
- Public networks:
- GPRS
- EGPRS
- UMTS
- DSL
Example of secure TCP/IP-based connection over the Internet via DSL (star topology)
To permit redundant data transmission, RTUs can be connected to the control center in the SIMATIC PCS 7 process control system over two paths. It is irrelevant whether the two paths are based on the same medium or on different media.
Further examples of possible telecontrol configurations as well as information on protocols and operating modes can be found in Catalog IK PI, Section "Telecontrol", and in the SIMATIC PCS 7 TeleControl brochure.