ABB NE870, User Manual

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Section 1 RNRP Router/Firewall
Section 1 RNRP Router/Firewall
NE870 is an industrial router which also acts as a firewall. The router/firewall can
be utilized to segment a system in to network areas and also security zones. NE870
is primarily intended to be used to separate client/server networks and control
networks, to separate different control and safety networks, but also to create RNRP
tunnel areas between RNRP networks.
The concept of security zoning is described in IEC62443. In short, security zoning
is a method to segment a system into zones with different security levels. A security
level is complied with by implementing a combination of security countermeasures.
The reason why it potentially could make sense to divide a system into security
zones, which comply with different security levels, could be that the risk for
different parts of the system varies. Another could be that the impact of a potential
incident varies.
NE870 supports RNRP (Redundant Network Routing Protocol), which enables
800xA to have two physically separate networks, and thereby avoid single point of
failure.
Housing
The back end holds a casted DIN-clip for stable mounting on a DIN-rail. Direct
wallmount is also possible using the four brackets in each corner. The back end also
holds the earth connection. For detailed ground connection information, refer to
section on “ Earth Connection ”.