Functional Description
20NL31-00 E1
2019-02-13
Page 30
3.3.2
Front Connection
3.3.2.1
Fast Ethernet D-Coded
Note: If the NL31 is equipped with D-coded Ethernet connectors, there are always two
A-coded connectors to allow gigabit uplink:
Table 9.
Connector types – Ethernet (4-pin, M12, D-coded)
Note: For railway rolling stock installation, the mating connector must be an approved
crimp connector.
Table 10.
Pin assignment – Ethernet (4-pin M12)
Table 11.
Signal mnemonics – Ethernet
See
Figure 1, Front interfaces on page 11
for the position of the connectors.
Connector
Type
On NL31
4-pin M12 receptacle, D-coded
e.g., Conec SAL-12D-IKHW4/A6090
Mating
4-pin M12 plug D-coded
e.g., Harting Electronics 21 03 881 1430
1
TX+
2
RX+
3
TX-
4
RX-
Signal
Direction
Function
RX+/-
in
Differential pair of receive data lines for 10BASE-T or
100BASE-T
TX+/-
out
Differential pair of transmit data lines for 10BASE-T
or 100BASE-T
3
1
2
4
