COMMUNICATION INTERFACE CONNECTION
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1TGC908004
5.2.
Switchgear Control Network
The Digital Gateway can be connected to a standard 10/100/1000 Base-T Ethernet network
through
LAN2
interface (Switchgear Control Network). Network components are standard
(COTS – commercial of the shelf) components but shall be of industrial grade design (e.g. no
office switches shall be used).
Examples of connections are shown in the following figures. All System configuration tools
(e.g. MNavigate) and system components (CMES Edge, Time Server) are connected to this
network (see Figure 2). The cable shall be CAT5 / CAT6 depending on requirements based on
the selected Ethernet communication speed. The connector type is standard RJ45 type.
If the switchgear control network has any connection to other networks (e.g.
plant management network etc.) measures have to be taken to protect the
switchgear control network against unauthorized access (e.g. through Router
and Firewall). This is a project specific configuration. Contact always the local
network administrator and review the project specific requirements.
If managed switches or routers are used in the Ethernet network, it has to be
taken care that sent ARP messages can pass through. Background: After
reboot, Digital Gateway will send an ARP (Address Resolution Protocol) mes-
sage to force all connected Ethernet devices to update their internal ARP ta-
ble. This special ARP message is used to map the network layer address (MAC
address) to a dedicated link layer address (IP address). This ARP table refresh
is required to be able to establish an Ethernet communication.
Connection Examples of Switchgear Control Network
5.2.1.1.
Option 1
If the Digital Gateway is directly connected to CMES Edge a cross-over network cable is used.
On the Digital Gateway, the cable must be connected to the LAN2 Ethernet port, on CMES
Edge the cable has to be connected to the designated Ethernet connector. The cable type is
CAT5 or higher.
Figure 13 Digital Gateway directly connected to
CMES Edge
Summary of Contents for LVS Digital
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