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3Systemdescription
22 Vista SmartTel
Modem/null modem
Use
1. Connectingexternaldialupdevicesforremoteconnectionsto
SmartControlunits.Usetheconnectingcableprovidedwiththe
dialupadapter.
2. SerialdirectconnectiontoaSmartControlunitwiththeprovidednull
modemcable.Thisconnectionmodeisrecommendedfor
commissioningandservice.
Configuration
SmartControlorSmartControlPROsoftwareallowsyoutosetthe
connectionspeedforremoteanddirectconnections.Inaddition,AT
commandscanbeenteredforinitialisationanddiallingofexternaldialup
adapters,orfordefiningdialmode.Refertotherespectivesoftwaremanual
formoreinformation.
Pin assignment for
RS-232 interface
Connectorendview/9pin
Sub-Dplug
Direct connection
with null modem
cable
SmartControl softwareandSmartTelautomaticallydetectaconnection
betweeninterfacesconnectedbynullmodemcable.Theywillattemptto
establishadirectconnection.Tothisend,aspecialcableplugcodeisqueried
whenstartingSmartControl software.
Pin Type Function Code
designation
1 Input DataCarrierDetect DCD
2 Input ReceiveData RxD
3 Output TransmitData TxD
4 Output DataTerminalReady DTR
5 - Ground GND
6 Input DataSendReady DSR
7 Output ReadytoSend RTS
8 Input CleartoSend CTS
9- - -
Ensuretopluginthenullmodemcablebeforestartingthedeviceandthe
SmartControl software.
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