CAMBRIDGE QT Especificações descarregar pdf (Página 12)

Custon Cabling Guidelines

If it is necessary to create custom cables on site, you

must follow these speciﬁcations to ensure

compliance with the Qt PRO™ equipment.

Any quality solid conductor 24 AWG CAT cable

is acceptable, provided it meets local code require-

ments and:

1) Meets requirements for plenum installation

(plenum-rated) if installed in a return air plenum.

Shielding is not required. Unshielded Twisted Pair

(UTP) cable is satisfactory. Snagless boots are not

required.

2) Has bent* 3-tyne (prong) contacts straddling each

conductor in RJ-45 connectors. See graphic below.

Aligned 2-tyne contacts intended for use

with stranded conductors are not acceptable under

any circumstances. Failure to follow this require-

ment will result in intermittent contact and inconsis-

tent system operation.

3) Once fabricated with RJ-45 connector, is

ﬁeld-tested before installation for continuity, shorts

and 1:1 (straight through) connection using

a standard network CAT cable tester.

2 types of RJ-45 connectors:

CORRECT INCORRECT

RJ-45 connector RJ-45 connector

with bent tyne with aligned

tyne

* There are two types of RJ-45 connectors. The “bent 3-tyne” con-

nector is intended for use with solid core CAT cable. The “aligned

tyne” connector is intended for use with stranded CAT cable.

Errors occur when incorrect cable/connector combinations are

used. Diagram shows the end on a view of a single contact in a

modular connector. The bent 3-tyne contact has the tines offset

from each other to straddle the conductor. USE THE BENT 3-TYNE

CONNECTOR FOR ALL Qt PRO™ INSTALLATIONS. Bent 3-tyne

connectors are available at Home Depot and most CAT cable sup-

pliers.

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CAMBRIDGE QT Especificações Página 12