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10/100BaseTx Pin-out
Pin Description
1 RX +
2 RX -
3 TX +
6 TX -
4, 5, 7, 9 NC
Table 5: RJ45 Ethernet pin-out assignment
5.1.2 Data and Power Ports
The RSG2100P comes standard with 4 10/100BaseTX IEEE 802.3af (PoE) compliant Ethernet
ports (ports 17 – 20). In addition to the 10/100BaseTX port features, the PoE ports provide nominal
48 VDC at 350 mA (max 15.4W/port), auto-sensing and automatic power off when cables are
removed. Table 6 shows the RJ45 PoE pin-out assignment.
10/100BaseTx PoE Pin-out
Pin Description
1 RX + and Power -
2 RX - and Power -
3 TX + and Power +
6 TX - and Power +
4, 5, 7, 9 NC
Table 6: RJ45 PoE pin-out assignment
5.1.3 Transient Suppression
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.
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