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2008 RuggedCom Inc. All rights reserved Rev104
4.7 Ethernet Ports
4.7.1 Copper Ports
The RS416 may have up to 4 10/100BaseTX ports that allow connection to standard CAT-5 UTP
cable with RJ45 male connectors. All RJ45 Ethernet ports feature auto-negotiating, auto-polarity,
and auto-crossover functions. The RJ45 receptacles can also accept and take advantage of
screened (commonly known as “shielded”) cabling. Figure 19 shows the RJ45 port pins
configuration.
Pin Signal
1 +Rx
2 -Rx
3 +Tx
4 No Connection
5 No Connection
6 -Tx
7 No Connection
8 No Connection
Figure 19: RJ45 port pins configuration.
NOTE: RuggedCom does not recommend the use of copper cabling of any length for critical real-
time substation automation applications. However, transient suppression circuitry is present on all
copper ports to protect against damage from electrical transients and to ensure IEC 61850-3 and
IEEE 1613 Class 1 conformance. This means that during the transient event communications
errors or interruptions may occur but recovery is automatic. RuggedCom also does not
recommended to use these ports to interface to field devices across distances which could produce
high levels of ground potential rise, (i.e. greater than 2500V) during line to ground fault conditions.