Crestron RMC3, Руководство по эксплуатации и установке

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Crestron RMC3 3-Series Room Media Controller
Check Network Wiring
Use the
Right Wire To ensure optimum performance over the full range of the installation
topology, use Crestron Certified Wire only. Failure to do so may incur
additional charges if support is required to identify performance
deficiencies because of using improper wire.
Calculate
Wire Length When calculating the length of wire for a particular Cresnet run, the wire
gauge and the Cresnet power usage of each network unit to be connected
must be taken into consideration. Use Crestron Certified Wire only. If
Cresnet units are to be daisy chained on the run, the Cresnet power usage
of each network unit to be daisy chained must be added together to
determine the Cresnet power usage of the entire chain. If the unit is 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 wire
gauge and the Cresnet power usage of the run should be used in the
following equation to calculate the cable length value on the equation’s
left side.
Cable Length Equation
L = Length of run (or chain) in feet
R = 6 Ohms (Crestron Certified Wire: 18 AWG (0.75 mm ))
or 1.6 Ohms (Cresnet HP: 12 AWG (4 mm ))
P = Cresnet power usage of entire run (or chain)
2
2
L <
40,000
R x P
Where:
Make sure the cable length value is less than the value calculated on the
right side of the equation. For example, a Cresnet run using 18 AWG
Crestron Certified Wire and drawing 20 watts should not have a length of
run more than 333 feet (101 meters). If Cresnet HP is used for the same
run, its length could extend to 1250 feet (381 meters).
NOTE: All Crestron certified Cresnet wiring must consist of two
twisted pairs. One twisted pair is the 24 and G pair and the other twisted
pair is the Y and Z pair.
Strip and Tin
Wire When daisy chaining Cresnet units, strip the ends of the wires carefully
to avoid nicking the conductors. Twist together the ends of the wires that
share a pin on the network connector and tin the twisted connection.
Apply solder only to the ends of the twisted wires. Avoid tinning too far
up the wires or the end becomes brittle. Insert the tinned connection into
the Cresnet connector and tighten the retaining screw. Repeat the
procedure for the other three conductors.
Operations & Installation Guide – DOC. 7558B Room Media Controller: RMC3
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