Crestron TPS-4500IMPC Manual de instrucciones - Página 10
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Interface Module
CAUTION: Possible equipment damage if miswired.
NOTE: When installing network wiring, refer to the latest revision of the
wiring diagram(s) appropriate to your specific system configuration,
available from the Downloads | Product Manuals | Wiring Diagrams
section of the Crestron website (www.crestron.com).
NOTE: Do not power up system until all wiring is verified. Care should
be taken to ensure data (Y, Z) and power (24, G) connections are not
crossed.
NOTE: All network 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.
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 network run, the length
of the run and the power factor of each network unit to be connected
must be taken into consideration. If network units are to be daisy-chained
on the run, the power factor of each network unit to be daisy-chained
must be added together to determine the power factor of the entire chain.
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
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.
6 • Interface Module: TPS-4500IMPC
40,000
R < L x PF
Crestron TPS-4500IMPC
Where:
R = Resistance (refer to table below).
L = Length of run (or chain) in feet.
PF = Power factor of entire run (or chain).
Operations Guide - DOC. 6163