442703/B
215
MoxaCP114EL-ISeriallineadapter
TheProcessorUnitisequippedwithaMoxaCP114EL-Iserialadapterboard.Theboard
providesfourseriallines.TheseriallinesareconnectedusingalargeD-Subminiature
connectorontherearsideoftheProcessorUnit.
TheMoxaCP114EL-IserialadaptersupportsRS-232,
RS-422andRS-485(both2and4-wire).The
connectionstotheboardaremadeusingaconverter
cablewithfour9-pinmaleD-subminiatureconnectors.
TheconvertercableissuppliedwiththeProcessorUnit.
•Manufacturer:Moxa
•Manufacturer’swebsite:https://www.moxa.com
Unlessotherwisespecied,thiscablemustbeprovidedbytheinstallationshipyard.If
youwishtouseRS-422orRS-485serialcommunication,useacablewithtwistedpairs.
Note
Observethatlongrunsofunshieldedcablewillpickupnoiseeasily.Thisisbecause
theRS-232signalsarenotbalanced.
MaximumlengthforanRS-232serialcableistypically60meterswith2400bpsdata
rate,howeverthisdependsonthecablequality.Alwayscheckthecablemanufacturers
specicationsfortheactual"shuntcapacitance".Acommongureis47.5pF/m,which
givesamaximumcablelengthofabout50meters.
EventhoughastandardexistforRS-232pinconguration,certainmanufacturermay
stillchoosetheirownconnectorpinsforthevarioussignalsused.Inordertomakethe
Cablelayoutandinterconnections
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