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Cresnet® Network

Design Guide

Crestron Electronics, Inc.

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Summary of Contents for Cresnet Network

Page 1: ...Cresnet Network Design Guide Crestron Electronics Inc ...

Page 2: ...t 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 ...

Page 3: ...ion Block 7 DIN Rail Cresnet Distribution Block 8 Cresnet Hubs 9 Cresnet Hub 9 Din Rail Cresnet Hub 10 Ethernet to Cresnet Bridging 11 Ethernet to Cresnet Bridge with PoE 11 Ethernet to Cresnet Bridge for CAEN Automation Enclosures 12 Wiring and Connectors 14 Overview 14 Supported Cresnet Cables 15 Non Plenum Cables 15 Plenum Rated Cables 16 High Power Cables 16 Data Only Cables 17 Terminate Cresn...

Page 4: ... 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 iv Contents Design Guide Doc 9292A ...

Page 5: ...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 l Overview of Cresnet server and client devices l Overview of Cresnet architecture l Cresnet device distribution options l Ethernet to Cre...

Page 6: ...esnet 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 ...

Page 7: ...efer 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...

Page 8: ...nt 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 Network Device Tree View tool in Crestron Toolbox software For more information refer to the Crestron Toolbox help file Some devices ship with default Cresnet IDs other than 03 or 01 to he...

Page 9: ... how various product types could be grouped using NET IDs NOTE Grouping Cresnet IDs helps organizations to group Cresnet devices to align with various organizational standards There are no electrical or communication advantages to grouping Cresnet IDs o Thermostats 10 through 1F o Keypads 20 through 4F o Touch screens 50 through 6F o Lighting controls 70 through 9F o Other products A0 through BF ...

Page 10: ...d distributes power and data from the server to all connected clients Cresnet distribution blocks are commonly used in home run network topologies but can also be used to power client devices off of a central Cresnet hub The following Cresnet distribution blocks are available Cresnet Distribution Block The CNTBLOCK is a parallel distribution block designed to facilitate the termination of multiple...

Page 11: ... cable and RJ 11 modular cables legacy installations only C2N HBLOCK Multitype Cresnet Distribution Block l Diagnostic LEDs indicate the presence of network power and data l Up to three units may be rack mounted together using the optional CNXRMAK rack mount kit sold separately l Includes an integral mounting flange for mounting to a flat surface CAUTION Do not connect or daisy chain more than one...

Page 12: ...DIN rail mounting enables modular installation alongside Crestron DIN Rail lighting and automation control modules and other third party DIN rail mountable devices DIN BLOCK DIN Rail Cresnet Distribution Block l Diagnostic LEDs indicate the presence of network power and data l Twelve 4 pin detachable green 3 5 mm terminal blocks are provided grouped in two sets of six l Provides a split power bus ...

Page 13: ...cility Cresnet Hub The CNXHUB is a six segment Cresnet hub designed for configuring large Cresnet networks A Cresnet hub is ordinarily required for any Cresnet network that has more than 25 devices or 1 500 ft 457 m of cable CNXHUB Cresnet Hub l Diagnostic LEDs indicate the presence of network activity for connected devices l Features six isolated Cresnet segments each capable of supporting anothe...

Page 14: ...trol modules and other third party DIN rail mountable devices DIN HUB DIN Rail Cresnet Hub l Diagnostic LEDs indicate the presence of network activity for connected devices l Features three isolated Cresnet segments each capable of supporting another 25 devices with an additional aggregate run of 1 500 ft 457 m of cable More hubs can be added to allow for a network of up to 90 devices l Each isola...

Page 15: ... deployed on a single Cresnet client and they can be addressed by more than one control system The following Ethernet to Cresnet bridge devices are supported for expanding the size of a Cresnet network over Ethernet Ethernet to Cresnet Bridge with PoE The DIN CENCN 2 POE works with any Cresnet server to maximize the reliability of a Cresnet network It offers a more robust solution than a Cresnet b...

Page 16: ...tton on the front panel that can be pressed to generate error codes on the LED indicators Complete details for each error code can be viewed in a web browser or via Crestron Toolbox software Ethernet to Cresnet Bridge for CAEN Automation Enclosures The CAEN BLOCK CENCN 2 POE works with any Cresnet server to maximize the reliability of a Cresnet network The bridge can be mounted at the bottom of a ...

Page 17: ...e power options o 10 W of power provided by PoE Power over Ethernet to both subnets with up to 20 W of power provided by PoE o 75 W of power provided by external power supplies to one or both subnets depending on the configuration l Diagnostic tools address many common Cresnet issues caused by wiring faults insufficient power or too many client devices l Provides a TEST button on the front panel t...

Page 18: ...4VDC power and ground o 22 AWG 0 33 mm2 blue white twisted pair is used for data Y and Z with aluminum polyester foil shield providing 100 coverage o 24 AWG 0 20 mm2 stranded tinned copper drain wire l High Powered HP Cresnet wire uses the following specifications o 12 AWG 3 31 mm2 red black twisted pair is used for 24VDC power and ground o 22 AWG 0 33 mm2 blue white twisted pair is used for data ...

Page 19: ...re recommended for most standard Cresnet wiring runs CRESNET NP series cables contain one 18 AWG pair for 24VDC and ground and one 22 AWG shielded twisted pair for control data within a non plenum PVC jacket CRESNET NP Series Cable l CRESNET NP BK B500 Cresnet Control Cable Non Plenum Black 500 ft 152 m box l CRESNET NP OR B500 Cresnet Control Cable Non Plenum Orange 500 ft 152 m box l CRESNET NP ...

Page 20: ...ted Orange 500 ft 152 m spool l CRESNET P TL SP500 Cresnet Control Cable Plenum Rated Teal 500 ft 152 m spool l CRESNET P TL SP1000 Cresnet Control Cable Plenum Rated Teal 1 000 ft 304 m spool High Power Cables CRESNET HP series cables feature extra large conductors for power and ground to support devices that draw a large amount of power over a Cresnet bus CRESNET HP series cables contain one 12 ...

Page 21: ...e aluminum polyester shield from the outside of the exposed blue and white twisted pair wires NOTE Trim the shield only to the PVC outer jacket of the exposed wire pair 3 Determine the treatment of the drain wire l The drain wire is only used on the source or power supply end It is trimmed and can be removed from the Cresnet network device end l When the drain wire is used it must be added to the ...

Page 22: ... appropriate slot on the connector that matches pin out on the device s NET port Typically this is done in the following order red 24VDC white Y data blue Z data and black ground with or without twisted drain wire NOTE Ensure the correct number of twists are used when terminating the white and blue wires as described in step 4 9 Secure the wires down to the connector by tightening down the cage cl...

Page 23: ...d drain wire is connected at the power supply end only o Foil shield can be removed at both ends l When terminating multiple wires into a green 3 5 mm terminal block o Never use more than one 18 AWG 0 82 mm2 or one 12 AWG 3 31 mm2 wires in the same pin connection o Never use more than two 22 AWG 0 33 mm2 wires in the same pin connection l When terminating multiple wires into a black 5 mm terminal ...

Page 24: ...ements The following sections explain how to calculate and troubleshoot power requirements for your Cresnet network system Cresnet Power Calculator The Cresnet Power Calculator is a tool that allows integrators to easily calculate the total power draw for all Cresnet clients connected to a given leg of the Cresnet network The Cresnet Power Calculator also calculates the total power available from ...

Page 25: ...must also be considered Wire Gauge Overview The black and red twisted pair 24VDC power and ground is used for powering Cresnet clients Therefore only the wire gauge for this twisted pair is required when calculating power requirements for wire runs The blue and white twisted pair Y and Z data does not factor into Cresnet power calculations Data distances are independent of power requirements and a...

Page 26: ... 500 is the value for L length of wiring run and 1 5 is the value for PF Cresnet power factor l R 40 000 1 500 x 1 5 l R 17 8 Next use the table above to compare the resistance value of the wiring run with the resistance value of the Cresnet wires For this scenario any wire gauge with a resistance value less than 17 8 can be used to supply power to the GLS ODT C CN Example Scenario 2 Calculate Wir...

Page 27: ...server to the power supply using only three of its four wires Y data Z data and ground 24VDC is not connected Another Cresnet cable is run from the power supply to the Cresnet client with all four wires connected NOTE To determine the wire gauge required for a wiring run between power supply and Cresnet client only calculate the distance between the power supply and Cresnet client The wiring run b...

Page 28: ...s or external power supplies on that leg l If using a C2N SPWS300 300 W power supply ensure that each segment does not draw more than 75 W and that the total power draw across the power supply does not exceed 300 W l If using a CNPWS 75 75 W power supply ensure that the total power draw across the power supply for all devices connected to the 24VDC connector does not exceed 75 W l For control syst...

Page 29: ...o the connector l Many network issues are caused by loose wire strands that can short another pin or missing wire strands l If any loose or missing wire strands are discovered redress the connection Also ensure that all screws on the terminal block are tightened down to the wires Excessive Cresnet Clients No more than 25 Cresnet clients can be powered by a single Cresnet server If more than 25 Cre...

Page 30: ...Crestron Electronics Inc 15 Volvo Drive Rockleigh NJ 07647 Tel 888 CRESTRON Fax 201 767 7656 www crestron com Design Guide Doc 9292A 06 16 22 Specifications subject to change without notice ...

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