SCALANCE network components
4.7 SCALANCE M industry router
Industrial Ethernet
242 System Manual, 09/2019, C79000-G8976-C242-10
Figure 4-40 SCALANCE M product family
GPRS / UMTS / LTE for complex stations with increased security requirements
GPRS, UMTS and LTE packet oriented mobile communications services. With their high
high transmission speeds, UMTS and LTE allow fast communication and are suitable above
all for mobile Internet access. Devices like the SCALANCE M874-x or the SCALANCE
M876-x combine the functionality of a VPN router with higher data security and firewall. Via
Industrial Ethernet other devices connected to the SCALANCE M_800 can be reached from
a master station for diagnostics and parameter assignment.
A control center PC must be reachable constantly from the mobile wireless network. To
achieve this, it is connected directly to the mobile wireless provider via a dedicated line or
permanently to the Internet, for example using DSL. An Industrial Security Appliance
SCALANCE S615, SCALANCE SC642-2C or SCALANCE SC646-2C takes over the firewall
function in the control center and represents the partner for the VPN connections of the
GPRS stations. The VPN configuration is performed by means of the configuration tool
Security Configuration Tool (SCT) and allows configuration without special IT experience.
The IP address of the master station should ideally be fixed; the IP address of the stations
can be assigned dynamically.
Wired communication using public or internal company networks
The devices SCALANCE M812-1, SCALANCE M816-1 and SCALANCE M826-2 allow the
connection of stations via wired networks. This can either be public or the company's own
communications infrastructure. When a station is connected to the Internet via ADSL, the
Internet services are available to you. For example, a device can send an e-mail if an alarm
event occurs. The SCALANCE M devices for wired communication also have proven
security functions (firewall and VPN).
If stations are connected cia the company's own 2-wire copper cables, point-to-point and
linear bus structures can be set up. The SCALANCE M826-2 device supports not only 2-wire
but also 4-wire operation. With this two 2-wire cables are aggregated to form a virtual
connection which allows the data rate to be doubled.
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