Ap p l i c At i o n Br i e f

Introduction Building/Factory owners are faced with the physical introduction of new control and monitoring technology in both

new and existing buildings in sometimes difficult and remote locations. More and more commercial operations are

looking to improve their “green” credentials by addressing excessive energy usage.

Industrial Plant Monitoring, redefined as Thermostatic controllers and temperature sensors, can be specifically identi-

fied in the following applications:

•HVACcontrol

•Roomtemperaturesensors

•Seriesreceivers

•Networkcoordinators

•Fancontrol

•LouvreMotorcontrol

•Pumpconfigurationandcontrol

Wireless Technology offers the solution to the difficulty encountered in the installation of new “wired” systems; ZigBee

Technology provides the most user friendly environment in which to provide these new services.

Figure 1 Typical internal wireless paths in an Industrial environment

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CEL ZigBeeTM/802.15.4 Application BriefData communication path in HVAC Systems utilizing wireless ZigBee Modules

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The ZigBee Solution

The technical specification ~ ZigBee Pro or IEEE 802.15.4? In most cases, the full ZigBee mesh network application (ZigBee Pro) will not be required for proprietary Industrial

HVACApplications.Point-to-Point(P2P)orPoint-to-Multipoint(P2MP)capabilitywillprobablybethemostsuitable

applicationformostUserrequirements.However,someproprietaryapplicationsmayrequiresmallmeshnetworks

of between 10 and 100 nodes; in these HVAC applications the IEEE 802.15.4 Wireless specification will be most

appropriate.

TheZigBee2.4GHzRadioscommunicateinP2P,P2MPandmeshnetworksutilizinglowpowerradiotransmissions

whicharereliableinexistingRFenvironments.Buildings,constructedofmetal,brickandconcrete,canofferchallenges

which ZigBee radios can overcome by navigation through mesh networks as well as ‘star’ and ‘cluster-tree’ networks.

Figure 2 Examples of Network Topologies

ZigBee Technology

Module or IC?ForIndustrialHVACapplicationsa‘module’ratherthanan‘IC’isoftenthepreferredsolution;lackofinternalRFen-

gineering design capability and the requirement for rapid time to market being key factors. Often the requirement

isa lowtech,wire-replacement,applicationwheretheZigBee/802.15.4radioisnotcentraltotheendapplication.

Volumesareinthelowtomoderateregion(5000to20,000units)andpre-designedradiosnotrequiringRFdesign

expertise (and hence time and costs) become the most cost effective solution.

ZigBeeICsolutions,ontheotherhand,requirein-house(orsub-contracted)experiencedwirelessengineeringteams

where system volumes normally exceed >100,000unitsperyear.Applications tend tobe ‘opensystems’ thatwill

implement the full ZigBee stack specification and will be price sensitive consumer markets.

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CEL’s ZigBee Ready Module Solution ~ Matrix ZMXM-400-1CELandLSResearch(LSR)haveformedajointventuretoprovideZigBee-Readymodules;LSRareresponsibleforthe

design(bothhardwareandsoftware)andCELformanufacturingandmarketingofaseriesofZigBeemodules,includ-

ing the Matrix Module described below.

MatrixModulesofferaminiature,fullyintegratedtransmissionsolutionbasedontheTexasInstrumentsCC2430

transceiverIC.TheMatrixModuleZMXM-400-1features‘DynamicPowerConfiguration’(DPC)whichallowstheuserto

drive the module at 10mW when enhanced range is required, or bypass the power amplifier for 1 mW output for low

power operation; changing power output is easily implemented in the embedded software.

Figure 3 CEL ZMXM-400-1 ZigBee Module

Applications

SoftwareLSRHost/ApplicationlayerprovidesahighlevelinterfacetotheIEE802.15.4MACLayerviaaserialinterface.TheLSR

softwarepre-loadedintotheMatrixmoduleMCUhassufficientfeatures/powerfor‘module-to-module’communica-

tion;detailsofwhichcanbefoundontheMatrixEvaluationKitCD.

Figure 4 LSR Host Application Layer

TheZigBeeAlliancepublishesasetofpublicapplicationprofiles,whichdefinewhatmessagesaresent‘overtheair’

foragivenapplication;therefore,deviceswiththesameapplicationprofileinteroperateend-to-end.However,cur-

rently most vendors create manufacturer specific profiles.

• BasedonTexasInstrumentschipsetCC2430transceiver: 8kBRAMand128kBFlash • PowerOutput~10mW (higher power 100mW version available) • Sensitivity~-92dBm(typ.) • LowPoweroperation Receivemode:< 27mA Standbymode:<5µA • DataRate~115.2kbaud • Dimensions~0.92”x1.13”;includingintegratedantenna (external antenna option available) • Extendablefunctionality GeneralpurposeDigitalI/O-17pins 8Channelinput12bitA/D • Certifications FCCPart15.247ModuleCertified(Portable)/IC(Canada EN3003281Certified/CEApproved

ZMXM-400-1 Specification

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Application Examples1. Wireless Industrial HVAC System can be established simply to replace an existing wired system for the

communication path.

Figure 5 Typical HVAC Block Diagram

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2. Hotel Energy Management Systems allow the hotel operator to ensure that empty rooms are not cooled or

heatedthussavingenergy.AwirelessHVACsystemconsistingofBatteryoperatedthermostats,occupancy

detectors and humidity sensors will be easy to install as all units can be placed in a convenient location and

areeasytoretrofitduetothelackofcabling.Thehoteloperatorcanpersonalizetheroomsettingsforregular

Clients(accordingtotheirrecordedprofiles)atcheck-in.

EachHVACunitcanbeconnectedtoanenergymanagementcontrollerthatadjustsroomtemperaturesbasedon

occupancy information received from the hotel’s management software.

Conclusion and BenefitsZigBeeNetworksareeasilyretrofittedtoaccommodatebudgetsandbuildingschedules;wherethereisawiredcom-

municationconnectiontodaythereisanopportunityforCELwirelessZigBeeModules.

InmostcasesafullZigBeePROmeshisnotrequiredassystemsarecommonlyproprietary;theP2P,P2MPandsmall

mesh applications are normally most appropriate.

TheestimatedcostofdesignoftimeandmoneyforaZigBeesolutioncanbebrieflysummarizedasfollows:

•Hardware~$20-$30K(Radio/analogdesignisdifficultandcostly)

•Software~$85K(Develop,implement,andmaintainZigBeestack)

•Certification~$11-$32K(Eachradioimplementationrequirescertification)

CELmodulesreducetotalsystemtimetoMarket

•CEL’sevaluationkitenablesnetworkprototypingindaysnotmonths~Inhousedesigncantakemanymonths

•CEL’sZigBeemodulesgetyoutomarketquickerwithprovencost-effectivesolutions!

•Radiodesignis:partengineeringandpartart~Designre-spinswilladdtimeandengineeringresources

togetradio“right”~CEL’smodulesarealreadyinproduction

•FailingFCC/CEcertificationcanaddmonthsoftimeandcosttoinhousedesign~CEL’smoduleshave

already been certified

Figure 6 Standard in-room wireless thermostat that can be controlled remotely by an energy management system

Figure 7 HVAC Louvre control unit

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4590 Patrick Henry Drive, Santa Clara, CA 95054-1817

Tel. 408-919-2500 FAX 408-988-0279 www.cel.com

Informationanddatapresentedhereissubjecttochangewithoutnotice.CaliforniaEasternLaboratoriesassumesnoresponsibilityfortheuseofanycircuitsdescribedherein and makes no representations or warranties, expressed or implied, that such circuits are free from patent infringement.

©CaliforniaEasternLaboratories11/08

Supplementary Information

CEL IEEE 802.15.4/ZigBee Transceiver Modules

4590 Patrick Henry Drive, Santa Clara, CA 95054 (408) 919-2500 www.cel.com

CL-627B 10.28.08

MODULE FreeStar Pro FreeStar Apex Apex LT Matrix 10mW Matrix 100mW

Transceiver Freescale™ MC13224 Freescale MC13192 Ember™ EM250 Ember EM260 TI™ CC2430 TI CC2430Chipset 32 bit, ARM7 8 bit, HCS08 16 bit, XAP2b Network processor 8 bit, 8051 8 bit, 8051

Fmax 32MHz 40MHz 12MHz n/a 32MHz 32MHz

Inputs/ Outputs 46 8 17 n/a 17 17

Network Mesh, Point-to-Point, Mesh, Point-to-Point, Mesh Mesh Mesh, Point-to-Point, Mesh, Point-to-Point, Point-to-Multipoint Point-to-Multipoint Point-to-Multipoint Point-to-Multipoint

Software/ Freescale LSR STAR Protocol Znet Pro® 3.1 Znet Pro® 3.1 LSR STAR Protocol LSR STAR ProtocolZigBee Stack BeeStack™ BeeStack™ (ZigBee Pro Certfied) (ZigBee Pro Certfied) Z-Stack™ Z-Stack™

Tx Power Output +20dBm +20dBm +20dBm +20dBm +10dBm +20dBm

Rx Sensitivity –100dBm –92dBm –97dBm –97dBm –92dBm –92 dBm

Range > 4000 ft 4000 ft > 4000 ft > 4000ft 2000 ft 4000 ft

Vcc 2.0 – 3.6V 2.4 – 3.6V 2.1 – 3.6V 2.1 – 3.6V 2.1 –3.6V 2.1 – 3.6V

Rx Current 30mA 42mA 37mA 37mA 27mA 27mA

Tx Current 193mA 150mA 170mA 170mA 50mA 130mA

Standby Current 1.1µA 5µA 5µA 5µA 5µA 5µA

Dimensions 25 x 36 mm 25 x 36mm 25 x 33mm 25 x 33mm 23 x 29mm 23 x 31mm

PART NO. ZFSM-201-1 ZFSM-101-1 ZAXM-201-1 ZALM-301-1 ZMXM-400-1 ZMXM-401-1

EVAL KIT ZFSM-201-KIT-1 ZFSM-101-KIT-1 ZAXM-201-KIT-1 ZAXM-201-KIT-1 ZMXM-400-KIT-2 ZMXM-401-KIT-1

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CEL modules provide a fully integrated, easy-to-use solution for your IEEE 802.15.4 networks.

Ideal for remote sensing, AMR/AMI, home and building automation, and security applications,

they feature low power consumption, long range and integrated antennas.

Qualified and certified, CEL modules are the result of broad applications knowledge and

over 45 years of product development experience. They combine industry-leading transceiver ICs

with high performance Power Amplifiers, RFIC switches and other components from CEL‘s

long-time marketing partner, NEC Electronics.