Application example: SCALANCE M874 for remote maintenance with VPN tunnel

Classical applications such as remote programming, parameterization and diagnosis, but also monitoring of machines and plants installed worldwide can be performed securely via a VPN from a service center that is connected over the Internet. Access to any IP-based devices, especially IP-based programmable controllers, which are downstream of the SCALANCE M874 in the local network.

Multimedia applications like video streaming can be implemented thanks to the increased bandwidth in the uplink.

Typical remote access scenario via a secure UMTS-based Internet connection

Application example: SINAUT ST7 with SCALANCE M874

The diagram below shows an S7-300 station with TIM 3V-IE and SCALANCE M874-2 connected to the control center (SINAUT ST7cc or ST7sc) via UMTS and Internet. Behind the SCALANCE S module, a TIM 4R-IE is installed. For the control center, this module performs the SINAUT communication with the stations connected via the Internet as well as with the stations that are connected to the TIM 4R-IE via two other networks. Cross traffic between individual stations in the various networks is routed via the TIM 4R-IE.

It is possible to forward fault messages from the plant to service personnel by text message, fax or e-mail.

Secure telecontrol with SINAUT ST7 over IP-based networks

Secure VPN communication with SIMATIC NET components

Secure VPN communication using Security Integrated components