By means of a floating RS232 interface, the TIM 3V-IE DNP3 module is connected to a WAN, and specifically via various data communication devices depending on the application:

• Dedicated line modems for point-to-point, point-to-multipoint or line connections
• Analog dialup modems (V3.0 or higher)
• Fiber-optic cable modules (via RS485 converters)
• Wireless devices from various manufacturers

In addition, it is possible to connect a Modbus RTU slave to the S7-300 system via the TIM 3V-IE DNP3.

Via the RJ45 interface, the TM 3V-IE DNP3 module can be connected to the Ethernet, i.e. to IP-based networks (LAN, IWLAN, DSL, GPRS, UMTS, etc.).

Configuration examples in conventional and IP-based WAN

Use in a station with transmission via a dedicated line network

The connection to the master station is via the MD2 modem, which sets up the connection via a dedicated line.

Use in a station with transmission via Internet

The stations are connected by means of an Internet connection. In this case, DSL routers must be used in the station and control center – preferably in combination with SCALANCE S in order to establish secure connections using VPN tunnels.

Use in a station with transmission over the GSM mobile telephone service GPRS or UMTS

The stations are connected via the GSM mobile telephone service GPRS. In this case the GPRS router SCALANCE M874-2 is used in the station and a SCALANCE S security module is used in the control center. This ensures that the VPN connections to the GPRS stations are set up.

For higher data rates, in place of the GRPS router SCALANCE M874-2, the UMTS router SCALANCE M874-3 can be implemented for use of the UMTS mobile wireless network.