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8.1. Ethernet
Router is equipped with two independent Ethernet interfaces, each with its own
MAC address.
First interface on X2 connector is used for connection to LAN network within
railway vehicle, and it is recommended to connect to it devices with as low
bandwidth as possible, due to the fact that X2 line loads main CPU.
Interface can be operated with 10/100/1000 Mbps speed.
Second interface is located on the rest of Ethernet connectors X3 to X7. The
number of connectors (0
× to 5 ×) differs according to variant. They are
connected to integrated Ethernet switch.
Interface can be operated with 10/100/1000 Mbps speed.
When using 10/100 Mbps speed and four-wire cable with counterpart
supporting 1000 Mbps speed, it is necessary to prohibit 1000 Mbps speed
promotion at least on one side. Otherwise auto-negotiate function (transmission
speed auto-detection) may not succeed. On switch interface this can be set
from application program.
Router interface is fitted with M12 connector, 8 pins, X-coding according to
IEC 61375-3-4:2014.
LAN
SWITCH
Fig. 12 - Ethernet connectors location
8.1.1
10/100 Mbps connection
Connection utilizes 4 pins of M12 connector for pair Tx+/Tx- and pair Rx+/Rx-.
Four- or eight-wire STP CAT6 (or higher) cable can be used.
(Tx-) 2
3 (Rx+)
4 (Rx-)
NC
(Tx+) 1
NC
NC
NC
C
Fig. 13 - M12 connector, four-wire connection
LAN interface
SWITCH
interface
Connectors