Terminating shielded cable

Installation and Operation, cont’d

NThe transmitter and receiver pair works with unshielded twisted pair (UTP) or shielded twisted pair (STP) cables; but, to ensure FCC Class A and CE compliance, STP cables are recommended.

The Tx/Rx includes four shielded RJ-45 connectors and a length of self-adhesive shielded tape that you can use to make the STP cables that connect the transmitter and receiver.

NExtron supplies the connectors and the shielded tape. You must supply the CAT 5, 5e, 6, or 7 STP cable.

Terminate the STP cable as follows:

1.	Peel back the cable shielding (figure 2-21) from the
	end of the cable the length of the RJ-45 connector body
	(approximately 7/8" [2.2 cm]) and fold it back.

Peel back shield and fold back.

Figure 2-21 — Peeling back the cable shielding

2.	Cut away and discard the clear cellophane inner wrapper
	from the end of the cable back to the folded-over cable
	shielding.
3.	Peel the backing off the self-adhesive shielded aluminum
	tape and wrap it around the folded-over cable shielding,
	slightly overlapping the beginning of the tape
	(figure 2-22).

	Aluminum Tape	Wrap tape around folded foil shielding.
	Aluminum Tape	Slightly overlap.
		Slightly overlap.
		Cut and save the excess tape
		for other connectors.

Figure 2-22 — Wrapping the shielded tape

4.	Cut the unused portion of the shielded tape and retain for
	shielding other RJ-45 connectors.
5.	Crimp the RJ-45 cable in the normal manner, folding the
	tangs at the end of the connector over the shielded tape
	(figure 2-23).

Crimped Connector

Figure 2-23 — Crimped RJ-45 connector

Power supply wiring

N• Only one power supply is required. A single power supply connected to either unit in the pair powers both units.

•A single power supply is included with systems packaged as a pair.

•A power supply is also included with each individually-packaged transmitter.

Figure 2-24 shows how to wire the connector for non-Decora and Decora units.

CPower supply voltage polarity is critical. Incorrect voltage polarity can damage the power supply and the transmitter or receiver. Identify the power cord negative lead by the ridges on the side of the cord (figure 2-24).

To verify the polarity before connection, plug in the power supply with no load and check the output with a voltmeter.

Non-Decora units

Smooth Ridges