RuggedCom RX5000 manual Copper Ethernet Ports, 1. RJ45 Twisted-Pair Copper Ports

3. Installation

3.5. Copper Ethernet Ports

The RuggedBackbone™ RX5000 can be ordered with up to 96 10/100Base-TX ports that allow connection to standard CAT-5 UTP cable with RJ45 male connectors. All copper Ethernet ports feature auto-negotiation, auto-polarity, and auto-crossover functions. The female RJ45 connector can accept and take advantage of screened (commonly known as "shielded") cabling.

3.5.1. RJ45 Twisted-Pair Copper Ports

Female RJ45 connectors are available on LMs that support 10/100Base-T and on LMs and SMs that support 10/100/1000Base-T Ethernet. Their pin assignments are described below.

	RJ45 Pin	10/100Base-Tx	10/100/1000Base-Tx
	1	RX+	A+
	2	RX-	A-
	3	TX+	B+
	4	NC	C+
	5	NC	C-
	6	TX-	B-
	7	NC	D+
	8	NC	D-
Figure 3.18. RJ45 Ethernet Jack	Table 3.4. RJ45 Ethernet Pinout

3.5.2. 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 meters using 4 pairs of 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. To ensure reliable, error-free data communications, new and preexisting communication paths should be verified for TIA/EIA-568-A compliance. The table: Cabling Categories And 1000Base-TX Compliance summarizes the relevant cabling standards as they apply to 100Base-TX connections.

Cabling Category	1000Base-	Required Action
	TX Compliant
< 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.

Table 3.5. Cabling Categories And 1000Base-TX Compliance

Follow these recommendations for copper data cabling in high electrical noise environments:

•Data cable lengths should be as short as possible - ideally limited to 3m (10') in length. Copper data cables should not be used for inter-building communications.

•Power and data cables should not be run in parallel for long distances, and should be installed in separate conduits. Power and data cables should intersect at 90° angles when necessary to reduce inductive coupling.

RuggedCom® RuggedBackbone™ 27 RX5000 Installation Guide Rev106