SBC PCD2.M120 - Cabling; Cable Routing

Saia-Burgess Controls AG
Manual Manual PCD 1 / PCD 2 Series │ Document 26 / 737 EN22 │ 2013-11-26
Guidance
2-4
Cabling
2
2.3 Cabling
2.3.1 Cable routing
● 230 Vsupplylinesandsignallinesmustbelaidinseparatecablesatleast10 cm
apart.Evenwithintheswitchingcabinet,itisadvisabletoleavespacebetween
power and signal lines.
● Digitalsignal/buslinesandanaloguesignal/sensorlinesshouldbelaidin
separatecables
● Itisadvisabletouseshieldedcablesforanaloguesignallines.
● Theshieldshouldbeearthedattheentryorexittotheswitchingcabinet.The
shieldsshouldbeasshortaspossibleandofthelargestpossiblecross-section.
Thecentralearthingpointshouldbe>10 mm² and connected to the PE ground
wirebytheshortestroute
● Theshieldisgenerallyconnectedtoonesideoftheswitchingcabinetonly,unless
thereisapotentialequalizationwithsignicantlylowerresistancethantheshield
resistance
● Inductivitiesinstalledinthesameswitchingcabinet,e.g.contactorcoils,shouldbe
providedwithsuitablesuppressors(RCelements)
● Switchingcabinetcomponentswithhigheldintensity,e.g.transformersor
frequencyinverters,shouldbeshieldedwithseparatorplateswithagoodground
connection.
Surge protection for long distances or external lines
● Wherelinesarelaidoutsidethebuilding,oroverlongerdistances,suitablesurge
protectionmeasuresshouldbeapplied.Forbuslinesinparticular,thesemeasures
are essential.
● Withlineslaidoutside,theshieldmusthaveadequatecurrent-carryingcapacity
andbeearthedatbothends.
● Thesurgeconductorsshouldbeinstalledattheinputtotheswitchingcabinet.