Installation guide

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4.7 RJ45 Twisted-Pair Data Ports

The RSG2100 may have several 10/100BaseTX ports that allow connection to standard CAT-5

UTP cable with RJ45 male connectors. All RSG2100 RJ45 RuggedSwitch products feature auto-

negotiating, auto-polarity, and auto-crossover functions. The RJ45 receptacles used can accept

and take advantage of screened (commonly known as “shielded”) cabling. The figure below shows

the RJ45 port pins configuration.

Figure 24: RJ45 port pins configuration.

Table 5: RJ45 Ethernet pin-out assignment

NOTE: RuggedCom does not recommend the use of CAT-5 (10/100Base-TX communications)

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.

10/100Base-TX Pin-out

Pin Description

1 RX +

2 RX -

3 TX +

6 TX -

4, 5, 7, 9 NC

Pin 8 Pin 1