Lenovo x3550 M5 - Page 217

ToConnect:ToDisconnect:
1.TurnOFFallpowersourcesandequipmentthatisto
beattachedtothisproduct.
2.Attachsignalcablestotheproduct.
3.Attachpowercordstotheproduct.
•Foracsystems,useapplianceinlets.
•Fordcsystems,ensurecorrectpolarityof-48Vdc
connections:RTNis+and-48Vdcis-.Earth
groundshoulduseatwo-holelugforsafety.
4.Attachsignalcablestootherdevices.
5.Connectpowercordstotheirsources.
6.TurnONallthepowersources.
1.TurnOFFallpowersourcesandequipmentthatisto
beattachedtothisproduct.
•Foracsystems,removeallpowercordsfromthe
chassispowerreceptaclesorinterruptpowerat
theacpowerdistributionunit.
•Fordcsystems,disconnectdcpowersources
atthebreakerpanelorbyturningoffthepower
source.Then,removethedccables.
2.Removethesignalcablesfromtheconnectors.
3.Removeallcablesfromthedevices.
Statement33
CAUTION:
Thisproductdoesnotprovideapower-controlbutton.Turningoffbladesorremovingpowermodules
andI/Omodulesdoesnotturnoffelectricalcurrenttotheproduct.Theproductalsomighthavemore
thanonepowercord.Toremoveallelectricalcurrentfromtheproduct,makesurethatallpower
cordsaredisconnectedfromthepowersource.
Statement34
CAUTION:
Toreducetheriskofelectricshockorenergyhazards:
•Thisequipmentmustbeinstalledbytrainedservicepersonnelinarestricted-accesslocation,
asdefinedbytheNECandIEC60950-1,FirstEdition,TheStandardforSafetyofInformation
TechnologyEquipment.
•Connecttheequipmenttoaproperlygroundedsafetyextralowvoltage(SELV)source.ASELV
sourceisasecondarycircuitthatisdesignedsothatnormalandsinglefaultconditionsdonot
causethevoltagestoexceedasafelevel(60Vdirectcurrent).
•Incorporateareadilyavailableapprovedandrateddisconnectdeviceinthefieldwiring.
•Seethespecificationsintheproductdocumentationfortherequiredcircuit-breakerratingfor
branchcircuitovercurrentprotection.
•Usecopperwireconductorsonly.Seethespecificationsintheproductdocumentationforthe
requiredwiresize.
Chapter5.Removingandreplacingcomponents203