
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
(may change depending
on cable)
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
Figure 13: M12 D-code Connector
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