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3: Installation and Hardware
XPress DR+ User Guide 21
Table 3-4. Ethernet Interface Signals
Pin Direction Name Function
TX+ Out 1 Transmit Data +
TX- Out 2 Transmit Data -
RX+ In 3 Differential Ethernet Receive Data +
RX- In 6 Differential Ethernet Receive Data -
The next drawing shows a typical RJ45 connector. The color is not standard but very
typical of an Ethernet patch cable. Pin 1 is located at the top of the connector (orange +
white). The view is from the end of the connector.
Table 3-5.Typical RJ45 Connector
Multi-Drop Ethernet Connections
Although there are two Ethernet ports, the XPress DR+ only has one MAC address and
IP address. Either port can be used as the primary connection with the other used
to inter-connect other Ethernet devices or cascade from one XPress DR+ to another.
Figure 3-7. Multi-Drop Ethernet Connections