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Cresnet® Network
Design Guide
Crestron Electronics, Inc.
Original
Original
Original
OriginalOriginal Instructions
Instructions
Instructions
InstructionsInstructions
The U.S. English version of this document is the original instructions.
All other languages are a translation of the original instructions.
Crestron product development software is licensed to Crestron dealers and Crestron Service Providers (CSPs) under a
limited nonexclusive, nontransferable Software Development Tools License Agreement. Crestron product operating
system software is licensed to Crestron dealers, CSPs, and end-users under a separate End-User License Agreement.
Both of these Agreements can be found on the Crestron website at www.crestron.com/legal/software_license_
agreement.
The product warranty can be found at .www.crestron.com/warranty
The specific patents that cover Crestron products are listed at .www.crestron.com/legal/patents
Certain Crestron products contain open source software. For specific information, visit .www.crestron.com/opensource
Crestron, the Crestron logo, 4-Series, Cresnet, Crestron Home, and Crestron Toolbox are either trademarks or registered
trademarks of Crestron Electronics, Inc. in the United States and/or other countries. Other trademarks, registered
trademarks, and trade names may be used in this document to refer to either the entities claiming the marks and names
or their products. Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not
responsible for errors in typography or photography.
©2022 Crestron Electronics, Inc.
Contents
Overview
Overview
Overview
OverviewOverview 1
1
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Cresnet
Cresnet
Cresnet
CresnetCresnet Device
Device
Device
DeviceDevice Definitions
Definitions
Definitions
DefinitionsDefinitions 2
2
2
22
Control Systems 2
Cresnet Servers 2
Cresnet Clients 2
Network
Network
Network
NetworkNetwork Architecture
Architecture
Architecture
ArchitectureArchitecture 3
3
3
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Maximum Network Size 3
Network Topologies 3
Home-Run Topology 3
Daisy-Chain Topology 3
Star-Network Topology 4
Cresnet ID Assignment 4
Client
Client
Client
ClientClient Device
Device
Device
DeviceDevice Distribution
Distribution
Distribution
DistributionDistribution 6
6
6
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Cresnet Distribution Blocks 6
Cresnet Distribution Block 6
Multitype Cresnet Distribution Block 7
DINRail Cresnet Distribution Block 8
Cresnet Hubs 9
Cresnet Hub 9
Din Rail Cresnet Hub 10
Ethernet-to-Cresnet
Ethernet-to-Cresnet
Ethernet-to-Cresnet
Ethernet-to-CresnetEthernet-to-Cresnet Bridging
Bridging
Bridging
BridgingBridging 11
11
11
1111
Ethernet-to-Cresnet Bridge with PoE 11
Ethernet-to-Cresnet Bridge for CAENAutomation Enclosures 12
Wiring
Wiring
Wiring
WiringWiring and
and
and
andand Connectors
Connectors
Connectors
ConnectorsConnectors 14
14
14
1414
Overview 14
Supported Cresnet Cables 15
Non-Plenum Cables 15
Plenum-Rated Cables 16
High-Power Cables 16
Data-Only Cables 17
Terminate Cresnet Wiring to a Connector 17
Best Practices 18
Power
Power
Power
PowerPower Requirements
Requirements
Requirements
RequirementsRequirements 20
20
20
2020
Cresnet Power Calculator 20
Calculate Power Requirements for Wire Runs 21
Design
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Wire Gauge Overview 21
Resistance Equation Formula 21
Example Scenarios 22
External Power Supplies 23
Appendix A:Troubleshoot Cresnet IDs 24
Insufficient Power 24
Incorrect Wire Gauge 24
Incorrect Wiring 24
Poor Wiring 25
Excessive Cresnet Clients 25
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Overview
The Cresnetâ„¢ communications protocol is designed for Crestron devices that do not require the
higher speeds of Ethernet. Cresnet provides a dependable and flexible wiring solution, allowing
multiple devices to be wired together in parallel using various network topologies. Asingle
Cresnet server can provide power and data to up to 25 client devices. Cresnet networks can be
further expanded using Cresnet hubs and Ethernet-to-Cresnet bridges.
This design guide provides the following information that can be referenced when designing a
Cresnet network system:
lOverview of Cresnet server and client devices
lOverview of Cresnet architecture
lCresnet device distribution options
lEthernet-to-Cresnet bridging options
lCresnet wiring and connector options and best practices
lCresnet power considerations
lCommon troubleshooting scenarios
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Cresnet Device Definitions
A Cresnet network consists of three primary device categories:control systems, Cresnet servers
(masters) and Cresnet clients (slaves).
Control Systems
A control system supplies data to a combination of Cresnet clients, Cresnet distribution blocks,
or Cresnet hubs via its (Cresnet)port. Ethernet-to-Cresnet bridges can be added to a
NET
NET
NET
NETNET
Crestron control system to expand the size of the Cresnet network, creating isolated Cresnet
subnets that each behave as a Cresnet server with its own unique address space.
Certain Crestron control systems and Ethernet-to-Cresnet bridges also supply 24VDCpower to
Cresnet clients.
Cresnet Servers
A Cresnet server is a connection to a control system that allows a control system program to
communicate with Cresnet clients. A Cresnet server supplies power and data to Cresnet clients
via its built-in Cresnet bus. The Cresnet bus distributes bidirectional data communication and
24VDC power to each wired client device over a single 4-conductor cable.
Cresnet Clients
A Cresnet client receives its power and data from a Cresnet server either directly (wired to the
Cresnet server)or indirectly (wired to a Cresnet distribution block or hub or daisy-chained to
another Cresnet client). Cresnet clients each have their own specific power draw requirements
that must be taken into consideration when designing the Cresnet network.
Examples of Cresnet clients include keypads, lighting controls, shade motors, thermostats, and
occupancy sensors.
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Network Architecture
The following sections provide information about the Cresnet network architecture that should
be taken into consideration when designing a Cresnet network.
Maximum Network Size
The maximum size of a Cresnet network is dependent on the system design:
lA single Cresnet server supports up to 25 client devices with a maximum aggregate cable
length of 1,500ft (457m).
lACresnet network can be expanded to contain up to 90 client devices using Cresnet hubs.
Cresnet hubs also allow for longer cable runs. For more information, refer to Cresnet Hubs
(on page9).
lACresnet network can be further expanded to contain over 90 client devices using
Ethernet-to-Cresnet bridges. For more information, refer to Ethernet-to-Cresnet Bridging
(on page11).
Network Topologies
Cresnet network systems can be designed using any of the following network topologies. A
topology should be chosen that best suits the needs of the particular Cresnet installation or
space.
Home-Run Topology
For home-run topologies, wiring is run from the Cresnet server to a single Cresnet client.
Adistribution block is typically used in home-run topologies to allow the Cresnet server to
provide power and data to multiple Cresnet clients from one central location in the room. For
more information, refer to .Cresnet Distribution Blocks (on page6)
Daisy-Chain Topology
For daisy-chain topologies, wiring is run from the Cresnet server to a Cresnet client. For
subsequent Cresnet clients, wiring is either run from a second port on the prior Cresnet client, or
wires are doubled in the connector. This daisy chain can continue for up to 25 client devices or a
for total run of 1,500ft (457m).
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Star-Network Topology
For star-network topologies, wiring is run from the Cresnet server to a Cresnet hub. Cresnet
clients are then branched off from the central hub. This topology is commonly used when a
Cresnet wiring run needs to be taken into a different room. A distribution block connected to the
hub can then be used to route power and data to Cresnet clients in the room. Several Cresnet
hubs can be used to distribute power and data to multiple distribution blocks that all branch off
from a single Cresnet server.
CAUTION:
CAUTION:
CAUTION:
CAUTION:CAUTION:When designing a Cresnet network using the star-network topology, the design
must ensure that no loops are created within the system. All runs from the Cresnet server
must connect to Cresnet clients or hubs only. Awiring run must never return to the Cresnet
server.
Cresnet ID Assignment
Cresnet IDs (NETIDs)are unique identifiers given to Cresnet devices on a network (similar to
IPIDs) that allow for network communication between Cresnet clients and servers. NET IDs
should be assigned using the tool in Crestron Toolboxâ„¢ software. For
Network
Network
Network
NetworkNetwork Device
Device
Device
DeviceDevice Tree
Tree
Tree
TreeTree View
View
View
ViewView
more information, refer to the .Crestron Toolbox help file
Some devices ship with default Cresnet IDs other than 03 or 01 to help streamline some
packaged systems or to facilitate adjustments by certain software wizard systems. For a partial
list of default Cresnet IDs, refer to .Crestron Online Help article 1001590
NOTE:
NOTE:
NOTE:
NOTE:NOTE:Cresnet servers always have a NET IDof 02. Valid NET IDs for Cresnet clients are
03through FE(03 through 254 decimal).
Refer to the following best practices when assigning NETIDs:
lEnsure no duplicate NETIDs are assigned to Cresnet clients on a Cresnet network. Using
the tool in Crestron Toolbox software to assign NETIDs is
Network
Network
Network
NetworkNetwork Device
Device
Device
DeviceDevice Tree
Tree
Tree
TreeTree View
View
View
ViewView
recommended to avoid duplicate IDs.
lNo more than 90 client devices should be present on a Cresnet network.


Product specificaties

Merk: Crestron
Categorie: Niet gecategoriseerd
Model: DIN-BLOCK

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