Extended Range Wireless Gateway
Crestron
CEN-ERFGW-POE
Check Network Wiring
Use the
Right Wire
In order 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
Power
CAUTION:
Use only Crestron power supplies for Crestron equipment.
Failure to do so could cause equipment damage or void the Crestron
warranty.
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 (
).
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).
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Wireless Gateway: CEN-ERFGW-POE
Operations & Installation Guide – DOC. 7158A
