Setup; Network Wiring - Crestron C2N-DVP4DI Reference Manual

Digital Video Processor

Setup

12 • Contents
Refer to the C2N-DVP4DI Operation Guide (Doc. 6112) for setup procedures and
configuration menus.
NOTE: Some of the following subsections use the Crestron Viewport. Refer to the
latest revision of 2-Series Console Commands (Doc. 6002) for console command
details.

Network Wiring

CAUTION: Crestron recommends that the C2N-DVP4DI be the only device
connected to the Crestron power supply (CNPWS-75). Connecting more devices
may cause the system to start up or operate improperly.
CAUTION: Crestron recommends that the C2N-DVP4DI be the only device
connected to the Crestron power supply (CNPWS-75, not included). Do not use a 2-
Series system (AV2, PRO2, etc.) as a power source. Because of surge current, do not
use a power supply smaller than 75 watts.
CAUTION: Use only Crestron power supplies for Crestron equipment. Failure to
do so could cause equipment damage or void the Crestron warranty. Power
Requirement is 75 Watts @ 24VDC.
NOTE: When making wire connections, refer to the latest revision of the Cresnet
Network Interconnect Drawing (Doc. 5411). The document can be obtained from the
Downloads | Product Manuals section of the Crestron website (www. crestron.com).
NOTE: For larger networks (i.e., greater than 28 network devices), it may be
necessary to add a Cresnet Hub/Repeater (CNXHUB) to maintain signal quality
throughout the network. Also, for networks with lengthy cable runs or varying types
of network devices, it may be desirable to add a hub/repeater after only 20 network
devices.
When calculating the wire gauge for a particular Cresnet run, the length of the run
and the power factor of each network unit to be connected must be taken into
consideration. If Cresnet units are to be daisy-chained on the run, the power factor of
each unit to be daisy-chained must be added together to determine the power factor
of the entire chain. If the unit is a home-run from a Crestron system power supply
network port, the power factor of that unit is the power factor of the entire run. The
length of the run in feet and the power factor of the run should be used in the
following resistance equation to calculate the value on the right side of the equation.
Resistance Equation
40,000
R < L x PF
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.
Crestron C2N-DVP4DI
Where: R = Resistance (refer to table below).
L = Length of run (or chain) in feet.
PF = Power factor of entire run (or chain).
Reference Guide – DOC. 6177A