13 ethernet connector (rj45 / m12), Ethernet connector (rj45 / m12), Table 19: signals used for fast ethernet – BECKHOFF EtherCAT Technology Section I User Manual
Page 52: Figure 12: rj45 connector, Figure 13: m12 d-code connector
Ethernet Physical Layer
I-32
Slave Controller
– Technology
5.13 Ethernet Connector (RJ45 / M12)
Fast Ethernet (100BASE-TX) uses two pairs/four pins. An RJ45 connector (8P8C) or an M12 D-code
connector can be used. The RJ45 connector is recommended to use MDI pinout (PC side) for all ports
for uniformity reasons. Standard Ethernet cables are used, not crossover cables. PHYs have to
support MDI/MDI-X auto-crossover.
Table 19: Signals used for Fast Ethernet
Signal
Name
Core Color
Contact Assignment
MDI
(may change depending
on cable)
RJ45
M12
D-code
TX+
Transmission Data +
Yellow (light orange)
1
1
TX-
Transmission Data -
Orange
2
3
RX+
Receive Data +
Light green
3
2
RX-
Receive Data -
Green
6
4
NOTE: MDI-X (Switches/Hubs) uses same outline as MDI but TX+ is RX+ and TX- is RX- and vice versa.
Figure 12: RJ45 Connector
3
4
1
2
Figure 13: M12 D-code Connector