10
453694/C
Electrostaticdischarge(ESD)
Electrostaticdischarge(ESD)isthesuddenowofelectricitybetweentwoelectrically
chargedobjects.Suchowcanbecausedbycontact,anelectricalshort,ordielectric
breakdown.Electrostaticdischarge(ESD)cancauseseriousdamagetoprintedcircuit
boardsandelectronicmodules.
BewareofElectrostaticDischarge(ESD)!
Note
Whenyouhandleelectroniccircuitboardsandmodules,youmustbewareofthedangers
ofelectrostaticdischarge(ESD),bothtoyourselfandtotheequipment.Inorderto
ensuresafetransportandstorage,circuitboardsandotherelectronicunitswillalways
bewrappedinaclearplasticprotectivebag,andthebagwillbesealed.
Forcorrectandsafehandlingofprintedcircuitboardsandelectronicmodules,youneed
asuitableworkingarea.Theworkingareamustbecoveredbyanapprovedconductive
servicematthathasaresistanceofbetween50kΩand2MΩ,andisconnecteddirectly
toareliableearthpointviaitsearthingcord.Y ou-andallotherservicepersonnel
involved-mustwearawristbandindirectcontactwiththeskin.Thewristbandmustbe
electricallyconnectedtotheservicemat.
PrecautionstopreventElectrostaticDischarge(ESD)
Sensitiveprintedcircuitboardsandelectronicmodulesmustalwaysbetransported
andstoredinprotectiveantistaticpackingbags.Itasalsoimportantthattheyarenot
transportedorstoredclosetostrongelectrostatic,electromagneticorradioactiveelds.If
itisnecessarytoopenandtouchtheprintedcircuitboardormoduleinsidetheprotective
bag,thefollowingprecautionsmustbetaken.
1Forcorrectandsafehandlingofprintedcircuitboardsandelectronicmodules,you
needasuitableworkingarea.Theworkingareamustbecoveredbyanapproved
conductiveservicematthathasaresistanceofbetween50kΩand2MΩ,andis
connecteddirectlytoareliableearthpointviaitsearthingcord.
2You-andallotherservicepersonnelinvolved-mustwearawristbandindirect
contactwiththeskin.Thewristbandmustbeelectricallyconnectedtotheservice
mat.
3Printedcircuitboardsandelectronicmodulesmustbeplacedontheconductive
servicematduringinstallationandmaintenanceoperations.
4If,foranyreason,itisnecessarytomovethecircuitboardfromtheconductive
servicemat,itmustbeplacedinanapprovedantistatictransportationcontainer(for
exampleastaticshieldingbag)beforetransportation.
5Duringinstallationandservicing,allelectricalequipment(forexamplesoldering
ironsandtestequipment)mustbeearthed.
cNODEModemEmbedInstructionManual
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