Cresnet Wiring Overview

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Communications between Crestron Cresnet devices occurs on the Cresnet bus. Cresnet is Crestron's proprietary 4-wire communications network that provides both 24V DC power and low-voltage, bidirectional communication that adheres to to RS-485 standards.

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Each job with Cresnet devices will have at least one Cresnet bus network. Every Cresnet bus network has a single //host// or //primary// device and one or more //client// or //secondary// devices (older materials may refer to hosts as //masters// and clients as //slaves//). Every Cresnet device on a Cresnet bus must be assigned a unique, one-byte hexadecimal Cresnet address. The range of available addresses is determined by the bus host:

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Power considerations also play a role in determining the number of Cresnet devices which can be supported on a Cresnet bus, however we will not cover them here due to the wide array of variables which impact power calculations and determining whether there is sufficient power for a given device.

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Zūm Link wiring is covered in more detail [[here>>doc:SHOWRUNNER™ Setup Guide.Troubleshooting Guide.Troubleshooting.Zūm Wired Wiring Overview.WebHome]].

= Cabling =

Cresnet cabling provides the physical infrastructure for communication between Crestron Cresnet devices and consists of a 4-wire, 2-pair cable available directly from Crestron with either plenum and non-plenum rated jackets.

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|=(% style="width: 307px;" %)Pair|=(% style="width: 287px;" %)Color|=(% style="width: 380px;" %)Purpose

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|(% colspan="1" rowspan="2" style="width:307px" %)18 AWG pair|(% style="width:287px" %)Red|(% style="width:380px" %)24 V DC Power

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|(% style="width:287px" %)Black|(% style="width:380px" %)Common

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|(% colspan="1" rowspan="2" style="width:307px" %)22 AWG shielded twisted pair|(% style="width:287px" %)White|(% style="width:380px" %)Data +

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|(% style="width:287px" %)Blue|(% style="width:380px" %)Data -

= Terminations =

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See //[[Figure 1>>WebHome||anchor="HFigure1"]]// for details.

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See //[[Figure 2>>WebHome||anchor="HFigure2"]]// for details.

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= Crestron Wiring Notes =

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Crestron includes some general Cresnet wiring guidelines in their submittals. Many of these suggestions are covered above, but we have included them here for reference:

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[[image:1704485841724-854.png]]

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