Edition EN03

Manual PCD2.W525&PCD3.W525│Document 26/853; Edition EN03│2013-09-18
Saia-Burgess Controls AG
Function
Hardware
1-3
1
1.3 Function
1.3.1 Power Supply
PCD2.W525/PCD3.W525hastobesuppliedexternally!Thispowersupplyisgal-
vanicallyisolatedtoboth,thePCDandtheI/OsofW525.Furthermore,thedesign
allowsusingthesamepowersupplyforthePCDandforW525withoutloosingthe
galvanicisolation.Theseschematicsshowthedifferentzonesofisolation:
1.3.2 Timing
● Inputs
○ Internally,W525nishesacquiringevery2msanewvalueforevery
  inputchannel
○ ThisvalueisalwaysreadytobereadbythePCD.
○ DependentonthePCDspeed,thetransmissiontimeofasingle16-Bit
  scaledvalue(ofasingleinputchannel)takestypically100μs(ona
  PCD2.M480)or600μs(onaPCD2.M170)
● Outputs
○ Internally,W525outputsthelastreceivedoutputvaluefromPCDwitha
  maximumdelayof2ms.
○ DependentonthePCDspeed,thetransmissiontimeofasingle16-Bit
  scaledoutputvaluetakestypically100μs(onaPCD2.M480)or600μs
  (onaPCD2.M170).