Setup; Network Wiring - Crestron QM-TX Operation Manual

Crestron QM-TX

Setup

Operations Guide – DOC. 6334

Network Wiring

CAUTION: In order to ensure optimum performance over the full range of
your installation topology, Crestron Certified Wire, and only Crestron Certified
Wire, should be used. Failure to do so, may incur additional charges if support is
required to identify performance deficiencies as a result of using improper wire.
CAUTION: Provide sufficient power to the system. Insufficient power can lead
to unpredictable results or damage to the equipment. Please use the Crestron
Power Calculator to help calculate how much power is needed for the system
(http://www.crestron.com/calculators).
CAUTION: Use only Crestron power supplies for Crestron equipment. Failure
to do so could cause equipment damage or void the Crestron warranty.
NOTE: When installing network wiring, refer to the latest revision of the
wiring diagram(s) appropriate for your specific system configuration, available
from the Crestron website.
When calculating the wire gauge for a particular Cresnet run, the length of the
run and the Cresnet power usage of each network unit to be connected must be
taken into consideration. If Cresnet units are to be daisy-chained on the run, the
Cresnet power usage of each unit to be daisy-chained must be added together to
determine the Cresnet power usage of the entire chain. If the unit is a home-run
from a Crestron system power supply network port, the Cresnet power usage of
that unit is the Cresnet power usage of the entire run. The length of the run in
feet and the Cresnet power usage of the run should be used in the resistance
equation below to calculate the value on the right side of the equation.
Resistance Equation
The required wire gauge should be chosen such that the resistance value is less
than the value calculated in the resistance equation. Refer to the following table.
Wire Gauge Values
RESISTANCE
4
6
10
15
13
8.7
NOTE: All Cresnet wiring must consist of two twisted pairs. One twisted pair
is the +24V conductor and the GND conductor, and the other twisted pair is the
Y conductor and the Z conductor.
QuickMedia™ Transmitter
WIRE GAUGE
16
18
20
22
Doubled CAT5
Tripled CAT5
QuickMedia™ Transmitter: QM-TX • 9