Installation
2.7 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 25: RJ45 port pins configuration.
Pin 1
Pin 8
10/100Base-TX pinout
Pin Description
1 RX
+
2 RX
-
3 TX
+
6 TX
-
4, 5, 7, 9 NC
Table 5: RJ45 Ethernet pinout 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.
RuggedCom
®
24
RuggedSwitch
®
RSG2100
