Network Wiring; Cable Connection For Programming - Crestron CNX-DVP4 Operation Manual

Digital Video Processor
14 • Digital Video Processor: CNX-DVP4

Network Wiring

CAUTION: Use only Crestron power supplies for Crestron equipment. Failure to do
so could cause equipment damage or void the Crestron warranty.
CAUTION: Crestron recommends that the CNX-DVP4 be the only device
connected to the Crestron power supply (CNPWS-75). Connecting more devices
may overload the power supply.
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).
Search for the CRESNET.PDF file.
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, 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.
Wire Gauge Values
RESISTANCE WIRE GAUGE
4
6
10
15
13
8.7

Cable Connection for Programming

Cable Hardware
•
DB9 RS-232 Cable (male/female, straight-through)
•
RJ45 10/100 BaseT Ethernet Cable
•
Cresnet Cable (for power)
Crestron CNX-DVP4
Where: R = Resistance (refer to table below).
L = Length of run (or chain) in feet.
PF = Power factor of entire run (or chain).
16
18
20
22
Doubled CAT5
Tripled CAT5
Operations Guide – DOC. 8170A