Elo TouchSystems E247 User manual

Serialinterfaces toopticcablemultiplexers
ELOE246, ELOE247,
ELOE248, ELOE249,
ELOE24A, ELOE24B
Operationmanual

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1.0 Introduction...........................................................................3
1.1 Useofthemultiplexer............................................................3
2.0 Operationprinciples...............................................................3
3.0 Installation.............................................................................3
3.1 Metallicinterfacesconnection...............................................3
3.2 RS232 interface......................................................................4
3.3 RS422 interface......................................................................5
3.4 Twomultiplexers interconnection..........................................5
3.5 PowerConnection..................................................................6
4.0 Specification..........................................................................6
4.1 Parameters.............................................................................6
4.2 Dimensionsandweight..........................................................6
4.3 Other......................................................................................6
5.0 Testing...................................................................................6
6.0 Troubleshooting.....................................................................7
7.0 Orderinginformation............................................................7
7.1 Relatedproducts.....................................................................7

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1.0Introduction
FiberOptic(SINGLEMODEand/orMULTIMODE)hasbeenusedforsignal
transmissioninautomationforcommunicationmoreandmoreoften.
Themainadvantageof FiberOpticisitsimmunitytoelectromagnetic
interference, slightradiationandhightransmissioncapacity
1.1Useofthemultiplexer
Usingapairof multiplexersseveral absolutelyindependenttransmissionchannels
overoneopticlinecanbeestabilished.Theindividual channelscanbeusedthat
way:
-several independentsimultaneousapplications(accordingtothenumberof
channels),
-simultaneousdata transferoveronechannelandcontrol,statusorclocksignals
overtherestof channels.
Multiplexercanworkwithoutanysetting.
2.0Operationprinciples
Multiplexerasociatesfollowingserial channelstoonepairof fibers:
Interface /modelE246 E247 E248 E249 E24AE24B
Numberof RS232 444-- -- --
Numberof RS422 -- -- -- 222
Thedata rateinonechannelisabsolutelyindependentonotherchannelsandthe
data ratecanbeanyrangefromzerotomaximum230 000 kbps.
Multiplexerisindependentoncommunicationprotocol.
3.0Installation
Therearethree differentproblemsof installationtodiscuss:RS232 orRS422 link
connection,opticfiberlinkconnection,respectivelytwomultiplexers
interconnectingandpowersupplyconnection.
3.1Metallicinterfacesconnection
All interfacesexceptopticfiberandsupplyinputaretakenouttoDB9female
connector.Theconnectordescriptionisintablesshowninfollowingchapters.
Theinterfacesconcentratedtooneconnectorcanbedistributedtoseparate
connectorsbyELOE24EandELOE24Fcables.

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3.2RS232 interface
Therearethree differentwayshowtousethemultiplexerELOE246,E247 or
E248 withRS232 interfaces:
1-FourindependentduplexchannelswithRS232 interface.Firswithsignals
TxD1andRxD1(contacts6,1),secondwithsignalsTxD2,RxD2(contacts7,2),
thirdTxD3,RxD3(contacts8,3) andfourthTxD4andRxD4(contacts9,4).
Contact5-GND iscommonforall channels.WhenthecableELOE24Eisused
eachchannelhasitsownstandardconnectorDB9FwiththesignalsRxD(contact
2), TxD(contact3) andGND (contact5).
2-Oneduplexline,transmittingdata (TxDandRxD)throughthechannele.g.
(No.1) andaccompaniingcontrolandstatussignals,RTS,CTS,DTR,DSRand
DCDthroughtherestof channels.
3–Twoduplexlines,eachusesonechannelfordata andsecondoneforcontrol
andstatussignal -handshake(e.g. RTS-CTS, orDTR-DSR).
Thedata rateisallowedinrangefrom0to230 000 bps.
Thecablebetweenenddevice andmultiplexermustnotexceed15 m.
contactsignal meaningdirection
1RxD1receiveddata of the1stRS232 fromthemultiplexer
2RxD2receiveddata of the2ndRS232 fromthemultiplexer
3RxD3receiveddata of the3rdRS232 fromthemultiplexer
4RxD4receiveddata of the4thRS232 fromthemultiplexer
5GND commonsignal ground
6TxD1transm. data of the1stRS232 intothemultiplexer
7TxD2transm. data of the2ndRS232 intothemultiplexer
8TxD3transm. data of the3rdRS232 intothemultiplexer
9TxD4transm. data of the4thRS232 intothemultiplexer

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3.3RS422 interface
RS422 isdestinedfortwopointconnection.Thesignal issymmetric,differential.
Eachsignal isdistributedoveritstwistedpair.Thewiresaremarkedforinstance
Rx1+andRx1-.Inidlestate(whichisaccordingtostopbit inassynchronneus
mode)thepotential of Rx1+ishigherthanthepotential of Rx1-. Theconnectoris
describedinfollowingtable:
ToimprovethetransferovertheRS422 linetheterminatingresistors100 -120 Ω
canbeconnectedbetweenthecorrespondingpairof wires.Theinstallationof
terminatorsisveryeasybytheswitchingonthe
switchesonthebacksideof multiplexer.
Themaximumcablelengthbetweenenddevice
andmultiplexermustnotexceed1200 m.
Multiplexercanworkwithoutanysetting–the
data ratecanbeanyintherangefrom0to
230 000 bps.Thetransferdoesnotdependon
otherchannelsandonthecommunication
protocol.
3.4Twomultiplexersinterconnection
TheopticcableisconnectedthroughtheSCconnector(modelsE247,E249,
E24A,E24B),orSTone(modelsE246,249).Theremotemultiplexer’s
transmittermustbeconnectedtolocal receiverandremotereceivermustbe
connectedtolocal transmitter(thefibersarecrossing).Thecorrectlyconnected
multiplexersareindicatedbyLINK indicator.
contactsignal meaningdirection
1Rx1+receiveddata of the1stRS422 fromthemultiplexer
2Rx2+receiveddata of the2ndRS422 fromthemultiplexer
3Tx1+transm. data of the1stRS422 intothemultiplexer
4Tx2+transm. data of the2ndRS422 intothemultiplexer
5GND ground
6Rx1- receiveddata of the1stRS422 fromthemultiplexer
7Rx2- receiveddata of the2ndRS422 fromthemultiplexer
8Tx1- transm. data of the1stRS422 intothemultiplexer
9Tx2- transm. data of the2ndRS422 intothemultiplexer
SWterminatedline
1On=Rx1
2On=Rx2
3On=Tx1
4On=Tx2
5
-
8
notused

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3.5PowerConnection
Theexternal powersupplymusthavefrom9Vto24VDC.Itcanbeconnected
throughtheDCconnectoronthebacksideof themultiplexer.Thecorrect
functionissignalizedbyPWRindicator.Thepowertakeoff dependsonthe
voltageratingof theusedsupply.Ifthevoltageis12Vit doesn’texceed400 mA,
if24V150 mA.
4.0Specification
4.1Parameters
TransferredinterfacesE246, E247, E248 4xRS232 (V.24),
TransferredinterfacesE249, E24A, E24B2xRS422 (V.11),
InterfacesconnectorDB9female,
Transfermodeduplex
OpticconnectorE246, E249 ST
E247, E248, E24A, E24BSC
OpticcableE246, E247, E249, E24Atwomultimodefibers50 /125 µm
or62.5/125 µm
OpticcableE248, E24Btwosinglemodefibers9/125 µm
Maximumdata rateRS232 230 000 bps,
Maximumdata rateRS422 230 000 bps,
MinimumMaximumdata rate0bps,
Supplyingexternal DC9-24V/400-150 mA
4.2Dimensionsand weight
Lengthxwidthxheight120x80x25 mm
Weight160 g
4.3Other
Storagetemperature-10o to+55o C
Workingtemperature+0oto+50oC
Humidity0–85% ((non-condensing)
5.0Testing
Incaseof properinstallationof powersupplythePWRdiodeisalight. Thecorrect
opticlinkinstallationisindicatedbyLINK.TheTx/RxDindicatormustblink
duringtransmission.

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6.0Troubleshooting
Symptom Action
MultiplexerdoesnotChecktheLINK –it isshiningwhen
workafterinstallationtheopticcablesareconnectedproperly.
Checkthepowersupply(PWR).
Checktheinterfaces’connection.
Checkthecorrectdirectionsof transmition.
Connectioninnormal Checkthepowersupply.
operationquit workingCheckifthecablesareOK.
Turn off andonthepowersupplyanddetect
ifmultiplexerwill startagain.
7.0Orderinginformation
Theorderingcodesare:
ELOE246 MUX4xRS232 /STmultimode,
ELOE247 MUX4xRS232 /SCmultimode,
ELOE248 MUX4xRS232 /SCsinglemode,
ELOE249 MUX2xRS422 /STmultimode,
ELOE24AMUX2xRS422 /SCmultimode,
ELOE24BMUX2xRS422 /SCsinglemode.
7.1Relatedproducts
ELOE0Q6Powersupply12V/500 mA
ELOE24Ecable4xRS232,
ELOE24Fcable2x RS422.

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