Installation guide

Network Infrastructure for EtherNet/IP™
7-84
Selecting Components
• Electrostatic processes
• High-current devices (greater than 100 amps)
7.2.2 Terminating Copper Cable
Termination of copper cables is a simple process. Copper cable termination tools and supplies are
available from many convenient sources. Figure 7-5 shows a typical RJ-45 Ethernet connector. Studies
have shown, however, when communicating at 100 Mbps, poor cable terminations can increase the
number of retransmissions. This will reduce system throughput.
Attention also must be paid to the selection of wire pairs used when terminating a copper Ethernet cable.
The proper wire pairs as defined in Table 7-1 must be used to preserve the cable’s ability to reject noise
and achieve the proper impedance.
Figure 7-5 Views of an RJ-45 Ethernet Connector.
Table 7-1 Pinouts for RJ-45 Ethernet Connectors
Pin No. Function
Color
EIA/TIA 568B
Color
EIA/TIA 568A
1 TX + White/Orange White/Green
2 TX - Orange Green
3 RX + White/Green White/Orange
4 Blue Blue
5 White/Blue White/Blue
6 RX - Green Orange
7 White/Brown White/Brown
8 Brown Brown