RUGGEDCOM RX1501
Installation Guide
Chapter 2
Installing the Device
Cabling Recommendations 15
Communication Ports
Connect to any of the available Ethernet ports on the device to access the ROX II console and Web interfaces via
the device's IP address. For more information about available ports, refer to Chapter 3, Communication Ports.
Section 2.6
Cabling Recommendations
Siemens recommends using SIMATIC NET industrial Ethernet shielded cables for all Ethernet ports.
Refer to the following sections for further recommendations and considerations:
• Section 2.6.1, “Protection On Twisted-Pair Data Ports”
• Section 2.6.2, “Gigabit Ethernet 1000Base-TX Cabling Recommendations”
Section 2.6.1
Protection On Twisted-Pair Data Ports
Siemens does not recommend the use of copper cabling of any length for critical, real-time substation automation
applications. All copper Ethernet ports on RUGGEDCOM products include transient suppression circuitry
to protect against damage from electrical transients and conform with IEC 61850-3 and IEEE 1613 Class 1
standards. This means that during a transient electrical event, communications errors or interruptions may occur,
but recovery is automatic.
Siemens also does not recommend using copper Ethernet ports to interface with devices in the field across
distances that could produce high levels of ground potential rise (i.e. greater than 2500 V), during line-to-ground
fault conditions.
Section 2.6.2
Gigabit Ethernet 1000Base-TX Cabling Recommendations
The IEEE 802.3ab Gigabit Ethernet standard defines 1000 Mbit/s Ethernet communications over distances of up
to 100 m (328 ft) using all 4 pairs in category 5 (or higher) balanced, unshielded twisted-pair cabling. For wiring
guidelines, system designers and integrators should refer to the Telecommunications Industry Association (TIA)
TIA/EIA-568-A wiring standard that characterizes minimum cabling performance specifications required for proper
Gigabit Ethernet operation. For reliable, error-free data communication, new and pre-existing communication
paths should be verified for TIA/EIA-568-A compliance.
The following table summarizes the relevant cabling standards:
Cabling Category
1000Base-
TX Compliant
Required Action
< 5 No New wiring infrastructure required.
5 Yes Verify TIA/EIA-568-A compliance.
5e Yes No action required. New installations should be designed with Category 5e or higher.
6 Yes No action required.
> 6 Yes Connector and wiring standards to be determined.
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