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InstallingtheS7-200S7_200的安裝TheS7-200equipmentisdesignedtobeeasytoinstall.Youcanusethemountingholestoattachthemodulestoapanel,oryoucanusethebuilt-inclipstomountthemodulesontoastandard(DIN)rail.ThesmallsizeoftheS7-200allowsyoutomakeefficientuseofspace.S7_200設(shè)備是易于安裝,可以通過安裝孔固定到板上,或者可以通過固定夾安裝到標(biāo)準(zhǔn)定位上.因為S7_200的面積很小,所以你可以充分利用空間.1.GuidelinesforInstallingS7-200DevicesYoucaninstallanS7-200eitheronapaneloronastandardrail,andyoucanorienttheS7-200eitherhorizontallyorvertically.1.S7_200安裝方法你可以把S7_200安裝到板上或安裝到標(biāo)準(zhǔn)的欄位上,同時你可以把它放成水平或堅直的.1)SeparatetheS7-200DevicesfromHeat,HighVoltage,andElectricalNoiseAsageneralruleforlayingoutthedevicesofyoursystem,alwaysseparatethedevicesthatgeneratehighvoltageandhighelectricalnoisefromthelow-voltage,logic-typedevicessuchastheS7-200.把S7_200遠(yuǎn)離熱源、高壓、電磁噪聲通常，在安排系統(tǒng)部件布局時，要把高壓與高電磁噪聲部分與低電壓與邏輯電路部分（如S7_200）分開來放置WhenconfiguringthelayoutoftheS7-200insideyourpanel,considertheheat-generatingdevicesandlocatetheelectronic-typedevicesinthecoolerareasofyourcabinet.Operatinganyelectronicdeviceinahigh-temperatureenvironmentwillreducethetimetofailure.當(dāng)把S7_200放置到板上時,要考慮發(fā)熱的器件與把電磁器件定位到你系統(tǒng)盒里的閑置區(qū)中.在高溫的環(huán)境下操作任何的電子器件都會讓器件縮短壽命.Consideralsotheroutingofthewiringforthedevicesinthepanel.AvoidplacinglowvoltagesignalwiresandcommunicationscablesinthesametraywithACpowerwiringandhigh-energy,rapidly-switchedDCwiring.同樣要考慮設(shè)備的在板上的布線情況,避免低壓的信號線和通信信號線與高壓的交流電和高能量.快速的DC切換線走同一個方向2)ProvideAdequateClearanceforCoolingandWiringS7-200devicesaredesignedfornaturalconvectioncooling.Forpropercooling,youmustprovideaclearanceofatleast25mmaboveandbelowthedevices.Also,allowatleast75mmofdepth.為降溫與配線提供足夠的間隙S7_200 針對自然對流冷卻而設(shè)計.為了得到足夠的降溫效果,就要在這個器件的的上方和下方留有最少25mm的間距.同時,要有75mm的深度.Tip:Forverticalmounting,themaximumallowableambienttemperatureisreducedby10°C.MounttheS7-200CPUbelowanyexpansionmodules.提示:針對堅直安裝時,最大的周圍環(huán)境溫度要比允許的最大的溫度縮小10度.可以在任何的彭脹參數(shù)下安裝的S7-200CPU.WhenplanningyourlayoutfortheS7-200system,allowenoughclearanceforthewiringandcommunicationscableconnections.ForadditionalflexibilityinconfiguringthelayoutoftheS7-200system,usetheI/Oexpansioncable.考慮S7_200系統(tǒng)的布局時,線間和通信線間要求有足夠的間隙.使用IO擴(kuò)展線,能更靈活配置S7_200系統(tǒng),Figure1MountingMethods,Orientation,andClearance圖一.安裝方法,定位,與間隙2.PowerBudget2.電源設(shè)計AllS7-200CPUshaveaninternalpowersupplythatprovidespowerfortheCPU,theexpansionmodules,andother24VDCuserpowerrequirements.所有的S7_200處理器都有一個內(nèi)部電源為cpu供電,可滿足擴(kuò)展模塊和要求24V直流電源供電的模塊TheS7-200CPUprovidesthe5VDClogicpowerneededforanyexpansioninyoursystem.PaycarefulattentiontoyoursystemconfigurationtoensurethatyourCPUcansupplythe5Vpowerrequiredbyyourselectedexpansionmodules.IfyourconfigurationrequiresmorepowerthantheCPUcansupply,youmustremoveamoduleorselectaCPUwithmorepowercapability.RefertoAppendixAforinformationaboutthe5VDClogicbudgetsuppliedbyyourS7-200CPUandthe5VDCpowerrequirementsoftheexpansionmodules.UseAppendixBasaguidefordetermininghowmuchpower(orcurrent)theCPUcanprovideforyourconfiguration.s7_200CPU提供了5V的邏輯直流電源支持?jǐn)U展模塊系統(tǒng).注意你的系統(tǒng)配置,以保證你的CPU所提供5V直流電源使所選的擴(kuò)展模塊正常工作.如果你的CPU提供的電源不能滿足的你配置所需的電源,你必須刪除某個模塊或選擇另一個CPU以保證正常工作.附錄A中有關(guān)于由S7_200CPU提供的電源和外部擴(kuò)展模塊要求的5V的信息.而附錄B指導(dǎo)如何決定的你的CPU能夠為配置提供多少電源.AllS7-200CPUsalsoprovidea24VDCsensorsupplythatcansupply24VDCforinputpoints,forrelaycoilpowerontheexpansionmodules,orforotherrequirements.Ifyourpowerrequirementsexceedthebudgetofthesensorsupply,thenyoumustaddanexternal24VDCpowersupplytoyoursystem.RefertoAppendixAforthe24VDCsensorsupplypowerbudgetforyourparticularS7-200CPU.所有的S7_200CPU都提供了24的傳感器直流電壓,這樣可以保證24V的輸入,和擴(kuò)展模塊繼電器或其它的模塊的電壓需要.如果電源的需求量大于傳感器電壓,那樣你就要增加一個外部的24V的直源來保證你系統(tǒng)工作.附錄A給出了針對S7_200CPU24V傳感器直流電源預(yù)算.Ifyourequireanexternal24VDCpowersupply,ensurethatthepowersupplyisnotconnectedinparallelwiththesensorsupplyoftheS7-200CPU.Forimprovedelectricalnoiseprotection,itisrecommendedthatthecommons(M)ofthedifferentpowersuppliesbeconnected.如果你需要一個外部的24V直流電,要保證它和S7_200CPU提供的傳感器電源連接不是平行的.為了減少電流躁聲的干攏,建議要把不同的電源的公共端(地)連起來.Warning:Connectinganexternal24VDCpowersupplyinparallelwiththeS7-20024VDCsensorsupplycanresultinaconflictbetweenthetwosuppliesaseachseekstoestablishitsownpreferredoutputvoltagelevel.警告:外部24VDC電源與S7_200專感器電源的平行連接會導(dǎo)致這兩個電源之間沖突,這種沖突表現(xiàn)為兩電源會尋找各自的輸出參考輸出電壓.Theresultofthisconflictcanbeshortenedlifetimeorimmediatefailureofoneorbothpowersupplies,withconsequentunpredictableoperationofthePLCsystem.Unpredictableoperationcouldresultindeathorseriousinjurytopersonnel,and/ordamagetoequipment.在接下來的未知的操作中,這種沖突可能會導(dǎo)致這兩個或者其中一個電源的壽命縮短,同樣,有可能會讓他們或其中一個不能工作.而未知的操作可能會導(dǎo)致生命安全受威脅,或受傷害,又或?qū)x器產(chǎn)生損害.TheS7-200DCsensorsupplyandanyexternalpowersupplyshouldprovidepowertodifferentpoints.S7_200直流電或外部24V電源提供的電源要接到不同的地方.3.InstallingandRemovingtheS7-200Modules安裝和載剪S7_200的模塊TheS7-200canbeeasilyinstalledonastandardDINrailoronapanel.S7_200可以簡單的安裝到標(biāo)準(zhǔn)的的DIN位上,或安裝到板上.1)PrerequisitesBeforeyouinstallorremoveanyelectricaldevice,ensurethatthepowertothatequipmenthasbeenturnedoff.Also,ensurethatthepowertoanyrelatedequipmenthasbeenturnedoff.前提條件安裝或移去S_200的某個電子器件時,要讓斷開電源.同樣,要讓繼電器的電源斷開.WarningAttemptstoinstallorremoveS7-200orrelatedequipmentwiththepowerappliedcouldcauseelectricshockorfaultyoperationofequipment.警告:利用提供的電源,在安裝或移去S7_200模塊或聯(lián)接設(shè)備時可能會導(dǎo)致電震或?qū)υO(shè)備不良的誤操作.FailuretodisableallpowertotheS7-200andrelatedequipmentduringinstallationorremovalprocedurescouldresultindeathorseriousinjurytopersonnel,and/ordamagetoequipment.AlwaysfollowappropriatesafetyprecautionsandensurethatpowertotheS7-200isdisabledbeforeattemptingtoinstallorremoveS7-200CPUsorrelatedequipment.在安裝或減少模塊時,沒有關(guān)掉所有提供給S7_200電源來連接設(shè)備可能會導(dǎo)致死亡或人體傷害,,又或會損害儀器.通常,遵循正確的安全防范規(guī)則,以保證S7-200的電源斷掉,才能進(jìn)行安裝和折去S7_200CPU或聯(lián)接設(shè)備.AlwaysensurethatwheneveryoureplaceorinstallanS7-200deviceyouusethecorrectmoduleorequivalentdevice.在任何時候要保證:在更換或安裝S7_200設(shè)備時,你要用正確的模塊或者是可替代的器件Warning警告Ifyouinstallanincorrectmodule,theprogramintheS7-200couldfunctionunpredictably.如果你安裝了不正確的模塊,在S7_200的程序可能不能按預(yù)期那樣運行.FailuretoreplaceanS7-200devicewiththesamemodel,orientation,orordercouldresultindeathorseriousinjurytopersonnel,and/ordamagetoequipment.用同樣的模型,定位,或順序來替換S7_200的器件將會失敗,且會導(dǎo)致死亡會人體受傷害,或?qū)υO(shè)備產(chǎn)生破壞.ReplaceanS7-200devicewiththesamemodel,andbesuretoorientandpositionitcorrectly.利用同樣的模型來替換S7_200的器件時要保證定位和放置正確.MountingDimensions安裝尺寸TheS7-200CPUsandexpansionmodulesincludemountingholestofacilitateinstallationonpanels.RefertoTable1forthemountingdimensions.S7_200的CPU和擴(kuò)展模塊包含了安裝孔到板上的簡易安裝尺寸.表1是安裝尺寸說明Table1MountingDimensionsInstallingaCPUorExpansionModule安裝CPU或擴(kuò)展模塊InstallingtheS7-200iseasy!Justfollowthesesteps.安裝S7_200是很容易的,安裝步驟如下:PanelMounting:板上裝配:Locate,drill,andtapthemountingholes(M4orAmericanStandardnumber8),usingthedimensionsinTable1.定位,鉆孔,在安裝孔上攻螺紋(M4或美國標(biāo)準(zhǔn)的8號大小),參照表1的尺寸.Securethemodule(s)tothepanel,usingtheappropriatescrews.用合適的螺絲釘讓模塊固定到板上Ifyouareusinganexpansionmodule,connecttheexpansionmoduleribboncableintotheexpansionportconnectorundertheaccessdoor.如果使用了擴(kuò)展模塊,就要通過入孔門把擴(kuò)展模塊的電線連到擴(kuò)展端口.DINRailMounting:DIN位的安裝Securetherailtothemountingpanelevery75mm.每隔7.5mm把桿固定到安裝板上.SnapopentheDINclip(locatedonthebottomofthemodule)andhookthebackofthemoduleontotheDINrail.咬開DIN夾(定位在模塊的底部)然后把模塊的底部鉤到DIN桿上.Ifyouareusinganexpansionmodule,connecttheexpansionmoduleribboncableintotheexpansionportconnectorundertheaccessdoor.如果你使用了擴(kuò)展模塊,就要通過入孔門把擴(kuò)展模塊的電線連到擴(kuò)展端口.RotatethemoduledowntotheDINrailandsnaptheclipclosed.Carefullycheckthatthecliphasfastenedthemodulesecurelyontotherail.Toavoiddamagetothemodule,pressonthetabofthemountingholeinsteadofpressingdirectlyonthefrontofthemodule.旋轉(zhuǎn)模塊到DIN桿上并用夾子咬緊.仔細(xì)檢查夾子是不是已經(jīng)夾穩(wěn)安裝桿,為了避免對模塊的損壞,要按住安裝而不是直接按在模塊的前面部分.Tip：提示:UsingDINrailstopscouldbehelpfulifyourS7-200isinanenvironmentwithhighvibrationpotentialoriftheS7-200hasbeeninstalledvertically.如果S7_200是處于非常振動環(huán)境或是已經(jīng)垂直安裝了,這時,用DIN桿來安裝是很好的選擇.Ifyoursystemisinahigh-vibrationenvironment,thenpanel-mountingtheS7-200willprovideagreaterlevelofvibrationprotection.如果系統(tǒng)是處于高振動的環(huán)境,那么,板上安裝S7_200將會給系統(tǒng)很好的防震保護(hù).RemovingaCPUorExpansionModule移去CPU或擴(kuò)展模塊ToremoveanS7-200CPUorexpansionmodule,followthesesteps:移去S7_200的CPU或擴(kuò)展模塊,參考如下步驟:RemovepowerfromtheS7-200.去掉S7_200的電源Disconnectallthewiringandcablingthatisattachedtothemodule.MostS7-200CPUandexpansionmoduleshaveremovableconnectorstomakethisjobeasier.斷掉連接擴(kuò)展模塊的線路,大多數(shù)的S7_200的CPU和擴(kuò)展模塊都有可折除的接口,這樣拆除就很容易了.Ifyouhaveexpansionmodulesconnectedtotheunitthatyouareremoving,opentheaccesscoverdooranddisconnecttheexpansionmoduleribboncablefromtheadjacentmodules.如果你的擴(kuò)展模塊連到你要拆除的單元,那樣你就打開孔蓋來去掉連接.UnscrewthemountingscrewsorsnapopentheDINclip.擰開螺絲,或松開DIN夾.⑤Removethemodule.移去模塊RemovingandReinstallingtheTerminalBlockConnector移去并重裝終端模塊的連接口MostS7-200moduleshaveremovableconnectorstomakeinstallingandreplacingthemoduleeasy.RefertoAppendixAtodeterminewhetheryourS7-200modulehasremovableconnectors.Youcanorderanoptionalfan-outconnectorformodulesthatdonothaveremovableconnectors.大部分的S7_200的模塊擁有靈活的接口,以致于在安裝和替換更容易.參照附錄A你可以選擇S7_200模塊是否有靈活的接口.你可以訂制輸出口沒有靈活接口的模塊.ToRemovetheConnector:去除連接接口Opentheconnectordoortogainaccesstotheconnector.找連接門來找到連接口Insertasmallscrewdriverinthenotchinthemiddleoftheconnector.插入小螺絲起子到連接口的中間凹處.RemovetheterminalconnectorbypryingthescrewdriverawayfromtheS7-200housing.SeeFigure2.通過螺絲起子把終端接口從S7_200箱子中去除.看圖2Figure2RemovingtheConnectorToReinstalltheConnector:重新安裝連接口Opentheconnectordoor.打開連接門Aligntheconnectorwiththepinsontheunitandalignthewiringedgeoftheconnectorinsidetherimoftheconnectorbase.利用模塊的連接腳把連接口對齊好,同時對齊好處于連接基板邊緣內(nèi)部的接口的布線邊緣問題.③Pressdownfirmlytorotatetheconnectoruntilitsnapsintoplace.Checkcarefullytoensurethattheconnectorisproperlyalignedandfullyengaged.用力地向下壓來旋轉(zhuǎn)連接口直到放好為好止仔細(xì)檢查以確保連接是正確地接上.4.GuidelinesforGroundingandWiring地線與布線規(guī)則PropergroundingandwiringofallelectricalequipmentisimportanttohelpensuretheoptimumoperationofyoursystemandtoprovideadditionalelectricalnoiseprotectionforyourapplicationandtheS7-200.電子設(shè)備合理布置地線和其它信號線可以是對系統(tǒng)正常運行的有利的,同時減少了噪聲的干擾.Prerequisites前提條件Beforeyougroundorinstallwiringtoanyelectricaldevice,ensurethatthepowertothatequipmenthasbeenturnedoff.Also,ensurethatthepowertoanyrelatedequipmenthasbeenturnedoff.在進(jìn)行走地線或裝線到任何電子設(shè)備時,保證所連的設(shè)備電源已經(jīng)關(guān)掉.同樣,要保證所有與該設(shè)備有相連的設(shè)備的電源都要關(guān)掉.EnsurethatyoufollowallapplicableelectricalcodeswhenwiringtheS7-200andrelatedequipment.Installandoperateallequipmentaccordingtoallapplicablenationalandlocalstandards.Contactyourlocalauthoritiestodeterminewhichcodesandstandardsapplytoyourspecificcase.在進(jìn)行S7-200的走線與進(jìn)行設(shè)備連接時要確保你遵循了S7_200使用手冊.在進(jìn)行安裝和操作S7_200時,要參照國際和地方的標(biāo)準(zhǔn).聯(lián)系當(dāng)?shù)夭块T,看那個規(guī)范和標(biāo)準(zhǔn)適合你的案例設(shè)計.WarningAttemptstoinstallorwiretheS7-200orrelatedequipmentwithpowerappliedcouldcauseelectricshockorfaultyoperationofequipment.FailuretodisableallpowertotheS7-200andrelatedequipmentduringinstallationorremovalprocedurescouldresultindeathorseriousinjurytopersonnel,and/ordamagetoequipment.警告:在實際的使用中,安裝或布線或連接設(shè)備可能會產(chǎn)生電震,或使設(shè)備操作不能正常運行,在安裝和裁減模塊過程中,沒有斷開所有的電源,將會導(dǎo)致人員死亡或會受到嚴(yán)重的傷害,又或會對設(shè)備產(chǎn)生損壞..AlwaysfollowappropriatesafetyprecautionsandensurethatpowertotheS7-200isdisabledbeforeattemptingtoinstallorremovetheS7-200orrelatedequipment.在安裝,移去S7_200設(shè)備或聯(lián)接設(shè)備時,要嚴(yán)格地遵循正確安全規(guī)范和保證所有連到S7_200的電源都是斷掉的.AlwaystakesafetyintoconsiderationasyoudesignthegroundingandwiringofyourS7-200system.Electroniccontroldevices,suchastheS7-200,canfailandcancauseunexpectedoperationoftheequipmentthatisbeingcontrolledormonitored.Forthisreason,youshouldimplementsafeguardsthatareindependentoftheS7-200toprotectagainstpossiblepersonalinjuryorequipmentdamage.在設(shè)計S7_200的布線時要把把安全問題放在首位.就S7_200控制器來說,它可以使到處于被控的設(shè)備不會工作,或會產(chǎn)生不可預(yù)知的誤操作.正因如此,你要進(jìn)行除S7_200系統(tǒng)設(shè)計外的安全保護(hù),以免產(chǎn)生設(shè)備損壞或人員傷亡.WarningControldevicescanfailinanunsafecondition,resultinginunexpectedoperationofcontrolledequipment.Suchunexpectedoperationscouldresultindeathorseriousinjurytopersonnel,and/ordamagetoequipment.Useanemergencystopfunction,electromechanicaloverrides,orotherredundantsafeguardsthatareindependentoftheS7-200.警告:控制器件在不穩(wěn)定情況下,會不能工作,并可導(dǎo)致控制設(shè)備不正常操作.這種未知的操作會導(dǎo)致人員傷亡或會導(dǎo)致儀器損壞.設(shè)計獨立于S7_200之外的緊急停止開關(guān),或腳踏開關(guān),或其它的安全措施是很有必要.2)GuidelinesforIsolationS7-200ACpowersupplyboundariesandI/OboundariestoACcircuitsarerated1500VAC.TheseisolationboundarieshavebeenexaminedandapprovedasprovidingsafeseparationbetweenAClineandlowvoltagecircuits.隔離規(guī)則:S7_200直流電的供電電壓上下限和I/0口到AC電路的上下限是1500V.這類型.在AC線路與低壓線路間的隔離已經(jīng)被測試過并被證明是一種可提供安全隔離情況.AlllowvoltagecircuitsconnectedtoanS7-200,suchas24Vpower,mustbesuppliedfromanapprovedsourcethatprovidessafeisolationfromAClineandotherhighvoltages.SuchsourcesincludedoubleinsulationasdefinedininternationalelectricalsafetystandardsandhaveoutputsthatareratedasSELV,PELV,Class2,orLimitedPoweraccordingtovariousstandards.所有連接到S7_200的低電壓,如24V電源都必須是要確保安全的,并是從AC線路或高壓電壓中進(jìn)行了隔離的電源.這樣的電源包括在國際電氣標(biāo)準(zhǔn)規(guī)定的雙重隔離的電源和具有輸出達(dá)到SELV,PELV,2類標(biāo)準(zhǔn)的電源,或是各種標(biāo)準(zhǔn)限定了的電源.WarningUseofnon-isolatedorsingleinsulationsuppliestosupplylowvoltagecircuitsfromanAClinecanresultinhazardousvoltagesappearingoncircuitsthatareexpectedtobetouchsafe,suchascommunicationscircuitsandlowvoltagesensorwiring.警告:使用沒有隔離或單絕緣的電源,從AC中電路中獲得電壓來提供給低電壓電路.將會導(dǎo)致危險電壓出現(xiàn)在那些本來安全的電路中,如通信電路和低電壓傳感器電路中.Suchunexpectedhighvoltagescouldresultindeathorseriousinjurytopersonnel,and/ordamagetoequipment.這種未知的電壓會導(dǎo)致人員傷亡,又或會導(dǎo)致儀器損壞.Onlyusehighvoltagetolowvoltagepowerconvertersthatareapprovedassourcesoftouchsafe,limitedvoltagecircuits.只有利有高電壓到低電壓的轉(zhuǎn)換器來限定電壓電路,要求這種轉(zhuǎn)換器是經(jīng)過驗證合格.3)GuidelinesforGroundingtheS7-200ThebestwaytogroundyourapplicationistoensurethatallthecommonandgroundconnectionsofyourS7-200andrelatedequipmentaregroundedtoasinglepoint.Thissinglepointshouldbeconnecteddirectlytotheearthgroundforyoursystem.S7_200的接地規(guī)則:最好的接地方法是:讓所有的公共端,S7_200的地相關(guān)的連接設(shè)備接地到同一個點.這個點要被直接連接到地球表面的地.Forimprovedelectricalnoiseprotection,itisrecommendedthatallDCcommonreturnsbeconnectedtothesamesingle-pointearthground.Connectthe24VDCsensorsupplycommon(M)toearthground.為了減少電磁噪聲的干擾,建議所有直流電的公共回路要連到同一個地點.把24V直流傳感器的電源的公共端連到地.Allgroundwiresshouldbeasshortaspossibleandshouldusealargewiresize,suchas2mm2(14AWG).所有的線路要盡可能短,且要用粗的線徑,如2mm大小.Whenlocatinggrounds,remembertoconsidersafetygroundingrequirementsandtheproperoperationofprotectiveinterruptingdevices.當(dāng)定位地點時,要記得考慮安全接地的要求,和合理進(jìn)行短路的情況的保護(hù).4)GuidelinesforWiringtheS7-200WhendesigningthewiringforyourS7-200,provideasingledisconnectswitchthatsimultaneouslyremovespowerfromtheS7-200CPUpowersupply,fromallinputcircuits,andfromalloutputcircuits.Provideover-currentprotection,suchasafuseorcircuitbreaker,tolimitfaultcurrentsonsupplywiring.Youmightwanttoprovideadditionalprotectionbyplacingafuseorothercurrentlimitineachoutputcircuit.4)S7_200的布線當(dāng)設(shè)計S7_200的走線時,要提供一個沒有接連的開關(guān),它可以從S7_200的電源,從整個輸入電源電路,和從整個輸出電源電路中同時斷開.提供一個過流保護(hù)電路,如保險絲或斷路開關(guān),來保護(hù)電路.可以在每一個輸出電路放置保險絲或其它的限流電路來提供一個額外的的保護(hù).Installappropriatesurgesuppressiondevicesforanywiringthatcouldbesubjecttolightningsurges.為任何的配線安裝合適的鎮(zhèn)流器可以減少電流擾動.Avoidplacinglow-voltagesignalwiresandcommunicationscablesinthesamewiretraywithACwiresandhigh-energy,rapidlyswitchedDCwires.Alwaysroutewiresinpairs,withtheneutralorcommonwirepairedwiththehotorsignal-carryingwire.盡量避免低壓電信號線和通信線纜與AC電路高能量,和快速DC開關(guān)電路相平行.布線總是利用一條中立的電路或是公共線路與信號線一起來布線的.Usetheshortestwirepossibleandensurethatthewireissizedproperlytocarrytherequiredcurrent.Theconnectoracceptswiresizesfrom2mm2to0.3mm2(14AWGto22AWG).Useshieldedwiresforoptimumprotectionagainstelectricalnoise.Typically,groundingtheshieldattheS7-200givesthebestresults.線路盡可能短,同時保證你的線寬可以通過所要求的電流.接口處的授線線寬范圍:2MM-0.3MMWhenwiringinputcircuitsthatarepoweredbyanexternalpowersupply,includeanover-currentprotectiondeviceinthatcircuit.Externalprotectionisnotnecessaryforcircuitsthatarepoweredbythe24VDCsensorsupplyfromtheS7-200becausethesensorsupplyisalreadycurrent-limited.當(dāng)布置由外電源供電的輸入電路時,要考慮到過流保護(hù).外部電路的電保護(hù)是不必要的,因為由S7_200提供的24V傳感器電壓已經(jīng)設(shè)計了電流限制措施.MostS7-200moduleshaveremovableconnectorsforuserwiring.(RefertoAppendixAtodetermineifyourmodulehasremovableconnectors.)Topreventlooseconnections,ensurethattheconnectorisseatedsecurelyandthatthewireisinstalledsecurelyintotheconnector.Toavoiddamagingtheconnector,becarefulthatyoudonotover-tightenthescrews.Themaximumtorquefortheconnectorscrewis0.56N-m(5inch-pounds).大部分的S7_200模塊都會為用戶提供可以移動的接口(可參見附錄A),為了防止不良連接,要確保連接頭已經(jīng)被接穩(wěn),還要保證到接口的電線要穩(wěn)固的接到了接口.為了防止損壞了接口,上螺絲釘時不用過緊.螺絲的最大的扭距是0.56N_mTohelppreventunwantedcurrentflowsinyourinstallation,theS7-200providesisolationboundariesatcertainpoints.Whenyouplanthewiringforyoursystem,youshouldconsidertheseisolationboundaries.RefertoAppendixAfortheamountofisolationprovidedandthelocationoftheisolationboundaries.Isolationboundariesratedlessthan1500VACmustnotbedependedonassafetyboundaries.為了防止破壞性的電流流入裝置,S7_200在某些地方提供了一些界限.在計劃系統(tǒng)時,要考慮這些隔離界限.詳情參照附錄A,它給出了所有隔離和隔離界限的定位.隔離上限小于1500V直流電壓,不能認(rèn)為就是安全的電壓.Tip：Foracommunicationsnetwork,themaximumlengthofthecommunicationscableis50mwithoutusingarepeater.ThecommunicationsportontheS7-200isnon-isolated.提示:對于通信網(wǎng)絡(luò)來說,在沒有轉(zhuǎn)發(fā)器的情況下,最長的通信線纜長度是50m.在S7_200中的通信端口是沒有隔離的.5.GuidelinesforInductiveLoadsYoushouldequipinductiveloadswithsuppressioncircuitstolimitvoltagerisewhenthecontroloutputturnsoff.Suppressioncircuitsprotectyouroutputsfromprematurefailureduetohighinductiveswitchingcurrents.Inaddition,suppressioncircuitslimittheelectricalnoisegeneratedwhenswitchinginductiveloads.電感負(fù)載的規(guī)則:在控制電壓關(guān)掉時,系統(tǒng)要配置電感負(fù)載抑制電路來限制電壓的上升.抑制電路可防止由于高電感的電流切換時產(chǎn)生的破壞性電流導(dǎo)致輸出電路損壞.另外,抑制電路可以限制電磁噪聲,它是由電感負(fù)載的切換產(chǎn)生.TipTheeffectivenessofagivensuppressioncircuitdependsontheapplication,andyoumustverifyitforyourparticularuse.Alwaysensurethatallcomponentsusedinyoursuppressioncircuitareratedforuseintheapplication.提示:有效的郁制電路是根據(jù)應(yīng)用來設(shè)計,要在特殊的應(yīng)用中進(jìn)行改變.要確保應(yīng)用系統(tǒng)的所有元器件符合應(yīng)用的要求.1)DCOutputsandRelaysThatControlDCLoadsTheDCoutputshaveinternalprotectionthatisadequateformostapplications.SincetherelayscanbeusedforeitheraDCoranACload,internalprotectionisnotprovided.直流輸出和控制直流負(fù)載的繼電器直流電源輸出具有的保護(hù)設(shè)計已滿足大多數(shù)的應(yīng)用.因此斷電器能夠被用到其它沒有內(nèi)部的保護(hù)的直流負(fù)載和交流負(fù)載中.交流的電Figure3showsasamplesuppressioncircuitforaDCload.Inmostapplications,theadditionofadiode(A)acrosstheinductiveloadissuitable,butifyourapplicationrequiresfasterturn-offtimes,thentheadditionofaZenerdiode(B)isrecommended.BesuretosizeyourZenerdiodeproperlyfortheamountofcurrentinyouroutputcircuit.圖3給出針對直流負(fù)載的簡單鎮(zhèn)流電路.在大部分的應(yīng)用中,外部的連接電感兩端的二極管要匹配.假如需要一個更短的截止時間,建議增加穩(wěn)壓二極管.務(wù)必讓穩(wěn)壓二極管穩(wěn)定參數(shù)要與輸出電路中電流大小相符.Figure3SuppressionCircuitforaDCLoad圖3.針對DC抑制電路2)ACOutputsandRelaysThatControlACLoadsTheACoutputshaveinternalprotectionthatisadequateformostapplications.SincetherelayscanbeusedforeitheraDCoranACload,internalprotectionisnotprovided.AC輸出與控制AC負(fù)載的繼電器AC輸出電路擁有的內(nèi)部保護(hù)電路可以滿足大部分的應(yīng)用.因此斷電器的可以用在沒有內(nèi)部保護(hù)電路DC電路或AC的負(fù)載的中Figure4SuppressionCircuitforanACLoad圖4針對AC負(fù)載的抑制電路Figure4showsasamplesuppressioncircuitforanACload.WhenyouusearelayorACoutputtoswitch115V/230VACloads,placeresistor/capacitornetworksacrosstheACloadasshowninthisfigure.Youcanalsouseametaloxidevaristor(MOV)tolimitpeakvoltage.EnsurethattheworkingvoltageoftheMOVisatleast20%greaterthanthenominallinevoltage.圖4針對AC負(fù)載的簡單的抑制電路,當(dāng)用繼電器或輸出電壓來切換115/230V的交流電壓時,要像圖示那樣,用電阻/電容網(wǎng)絡(luò)來接在直流負(fù)載的兩端.也可以用金屬氧化變阻器來限制電壓峰值.以保證金屬氧化變阻器的工作電壓來最少比標(biāo)稱電壓大20%.NoticeWhenrelayexpansionmodulesareusedtoswitch230VACinductiveloads,theexternalresistor/capacitornoisesuppressioncircuitmustbeplacedacrosstheACloadasshowninFigure4注意:當(dāng)用繼電器擴(kuò)展模塊來切換230V交流電感負(fù)載時,外部電阻/電容的噪聲抑制電路要像圖4那樣接在交流負(fù)載的兩端.6.GuidelinesforLampLoadsLamploadsaredamagingtorelaycontactsbecauseofthehighturn-onsurgecurrent.Thissurgecurrentwillnominallybe10to15timesthesteadystatecurrentforaTungstenlamp.Areplaceableinterposingrelayorsurgelimiterisrecommendedforlamploadsthatwillbeswitchedalargenumberoftimesduringthelifetimeoftheapplication.6.電燈負(fù)載規(guī)則電燈負(fù)載是對繼電器的連接有害的,因為它打開時具有很高的沖擊電流.對于鎢燈來說,它的值將會穩(wěn)態(tài)電流的10到15倍.建議用用中介繼電器或波動限制器來做電燈的負(fù)載保護(hù),它們在應(yīng)用中能夠用很多次 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