Switchgear Control Network; Connection Examples Of Switchgear Control Network; Figure 13 Digital Gateway Directly Connected To Cmes Edge - ABB LVS Digital Manual

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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.

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.

2 0

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.

COM MU NI CAT IO N I NT ERFACE CONNECTI ON

1 TG C90 80 04

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