Specifications

42 Input/Output Controller Replacement Instructions
Additional Information
Figure 26 RJ-45 Receptacle and Plug
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports
contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when
connecting cables
Table 7 RJ-45 Receptacle Pinouts
Note Referring to the RJ-45 pinout in Table 7, proper common-mode line terminations should be
used for the unused Category 5, UTP cable pairs 4/5 and 7/8. Common-mode termination reduces
electromagnetic interference (EMI).
Depending on your I/O controller RJ-45 interface cabling requirements, use the pinouts shown in
Figure 27 and Figure 28 for straight-through and crossover twisted-pair cable connections.
Figure 27 Straight-Through Cable Pinout, I/O Controller RJ-45 Connection to an End
Station or DTE
Pin Description
1 Receive Data + (RxD+)
2 RxD–
3 Transmit Data + (TxD+)
6 TxD–
H2936
8 7 6 5 4 3 2 1
RJ-45 connector
End stationEthernet port
3 TxD+
6 TxD–
1 RxD+
2 RxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD– H10416