Chapter 3
Communication Ports
RUGGEDCOM RMC30
Installation Guide
14 Copper Ethernet Ports
WARNING!
Electric shock hazard – risk of serious personal injury and/or equipment interference. If shielded
cables are used, make sure the shielded cables do not form a ground loop via the shield wire and the
RJ45 receptacles at either end. Ground loops can cause excessive noise and interference, but more
importantly, create a potential shock hazard that can result in serious injury.
IMPORTANT!
For substation applications, do not use the copper Ethernet port to interface with field devices across
distances that could produce high levels of ground potential rise (i.e. greater than 2500 V) during line-
to-ground fault conditions.
LEDs
Each port features a Speed and Link LED that indicates the state of the port.
LED State Description
Yellow The port is operating at 100 MbpsSpeed
Off The port is operating at 10 Mbps
Yellow (Solid) Link established
Yellow (Blinking) Link activity
Link
Off No link detected
Pin-Out
The following is the pin-out for the RJ45 male connectors:
Figure7:RJ45 Ethernet Port Pin Configuration
Pin Name Description
1 RX+ Receive Data+
2 RX- Receive Data-
3 TX+ Transmit Data+
4 Reserved (Do Not Connect)
5 Reserved (Do Not Connect)
6 TX- Transmit Data-
7 Reserved (Do Not Connect)
8 Reserved (Do Not Connect)
Specifications
For specifications on the available copper Ethernet ports, refer to Section4.2, “Copper Ethernet Port
Specifications” .
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