Digital Monitoring Products XR2500F Guía de instalación descargar pdf (Pagina 23)

XR2500F Installation Guide Digital Monitoring Products

InstallatIon

10.4 Mounting Keypads and Zone Expansion Modules

LCDkeypadshaveremovablecoversthatallowmountingthekeypadtoawallorotheratsurfaceusingthe

screwholesoneachcornerofthebase.Beforemountingthebase,connectthekeypadwireharnessleads

tothekeypadcablefromthepanelandtoanydevicewiringruntothatlocation.Thenattachtheharnessto

thepinconnectoronthePCboard,mountthebase,andinstallthekeypadcovermakingsureallofthekeys

extendthroughtheirrespectiveholes.

Formountingkeypadsonsolidwalls,orforapplicationswhereconduitisrequired,usetheModel6951-1/2”

deeportheModel6961/2”deepbackboxes.

TheDMP711,714,715,716,and717modulesareeachcontainedinmoldedplastichousingswithremovable

covers.Thebaseprovidesyouwithmountingholesforinstallingtheunittoawall,switchplate,orother

surface.

10.5 Connecting LX-Bus and Keypad Bus Devices

SeveralfactorsdeterminetheDMPLX-Bus™andkeypadbusperformancecharacteristics:thewirelengthand

gaugeused,thenumberofdevicesconnected,andthevoltageateachdevice.WhenplanninganLX-Bus™

andkeypadbusinstallation,keepinmindthefollowinginformation:

1.DMPrecommendsusing18or22-gaugeunshielded wireforallkeypadandLX-Buscircuits.Do not use

twistedpairorshieldedwireforLX-Busandkeypadbusdatacircuits.

2.Onkeypadbuscircuits,tomaintainauxiliarypowerintegritywhenusing22-gaugewiredonotexceed500

feet.Whenusing18-gaugewiredonotexceed1,000feet.Toincreasethewirelengthortoadddevices,

installanadditionalpowersupplythatislistedforFireProtectiveSignaling,powerlimited,andregulated

(12 VDC nominal) with battery backup.

Note:Eachpanelallowsaspecicnumberofsupervisedkeypads.Addadditionalkeypadsinthe

unsupervisedmode.Refertothepanelinstallationguideforthespecicnumberofsupervisedkeypads

allowed.

3.Maximumdistanceforanyonebuscircuit(lengthofwire)is2,500feetregardlessofthewiregauge.This

distancecanbeintheformofonelongwirerunormultiplebrancheswithallwiringtotalingnomore

than2,500feet.Aswiredistancefromthepanelincreases,DCvoltageonthewiredecreases.Maximum

numberofLX-Busdevicesontherst2,500footcircuitis40devices.

4.Maximumvoltagedropbetweenthepanel(orauxiliarypowersupply)andanydeviceis2.0VDC.Ifthe

voltageatanydeviceislessthantherequiredlevel,addanauxiliarypowersupplyattheendofthe

circuit.Whenvoltageistoolow,thedevicescannotoperateproperly.

ForadditionalinformationrefertotheLX-Bus/KeypadBusWiringApplicationNote(LT-2031).

Expansion Interface Cards (Models 481, 462N, 462P, 463G, and 472)

TheLX-Busprovidedonthesecardsrequiresonlya4-wirecablebetweenthecardandanydevices

connectedtothebus.Youcanconnectdevices(zoneoroutputexpansionmodules)togetheronthesame

cableorprovideseparaterunsbacktothecard.EachLX-Busprovidesupto100zonesoroutputs.

Note:DonotusetwistedpairorshieldedwirewhenconnectinganLX-Busorkeypadbus.

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Digital Monitoring Products XR2500F Guía de instalación Pagina 23