Siemens RUGGEDCOM RMC Installation Manual page 16

Chapter 3
Communication 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.
Each port features a Speed and Link LED that indicates the state of the port.
LED
Speed
Link
The following is the pin-out for the RJ45 male connectors:
8
Figure 7: RJ45 Ethernet Port Pin Configuration
For specifications on the available copper Ethernet ports, refer to
Specifications".
To accommodate signals from end devices and network switching equipment, the RMC is equipped with
a crossover selection switch. This switch will allow for the proper connection regardless of the cable type
configuration.
Category 5 network cabling can be constructed in two possible configurations: Straight through and crossover (X-
over). Straight through cabling involves a pin-to-pin connection, while crossover cabling matches the transmitting
differential pair to the receiving differential pair. The following table summarizes the two possible configurations:
TIA 568B Straight Through Pin-Out
Device 1
Pin Colour
1 White/Orange
2 Orange
3 White/Green
6 Green
10
State
Yellow
Off
Yellow (Solid)
Yellow (Blinking)
Off
1
Device 2
Pin Colour
1 White/Orange
2 Orange
3 White/Green
6 Green
Description
The port is operating at 100 Mbps
The port is operating at 10 Mbps
Link established
Link activity
No link detected
Pin Name
1 RX+
2 RX-
3 TX+
4 Reserved (Do Not Connect)
5 Reserved (Do Not Connect)
6 TX-
7 Reserved (Do Not Connect)
8 Reserved (Do Not Connect)
Section 4.2, "Copper Ethernet Port
TIA 568B Crossover Wiring Pin-Out
Device 1
Pin Colour
1 White/Orange
2 Orange
3 White/Green
6 Green
RUGGEDCOM RMC
Installation Guide
Description
Receive Data+
Receive Data-
Transmit Data+
Transmit Data-
Device 2
Pin Colour
1 White/Green
2 Green
3 White/Green
6 Green
Copper Ethernet Ports