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PERFORMANCECONTROLS,INC.SOP#0809670Rev.3
MRIGradientDriveSystem800V
NetworkedInterfaceController
FunctionalSpecification
SCOPE:
ThisdocumentdescribesthefeaturesandinterfacefacilitiesofthePerformance
Controls,Inc.,800VNetworkedInterfaceController(NICandDisplayAssembly
1109671fortheMRIGradientDriveSystemapplication.
OWNER:EngineeringDepartment
Release
Approvals:
MRIGradientDriveSystem800VNetworkedInterfaceControllerFunctional
Specification
0809670Rev.3
1.0DESCRIPTION
TheNICisamicroprocessor-basedcontrolcomputerthatisintegraltotheMRIGradient
DriveSystem.TheNICcanreceiveandactoncommandsfromtheusershostcomputer
orfromaterminal.CommunicationwithusersequipmentisaccomplishedviaanRS-232
serialport.TheNICcommunicateswiththesystemamplifierandpowersupplymodules
throughasystem-wideI2Cserialbus.Eachsystemmoduleonthebusrespondstoa
preassignednetworkaddress.A2-line,40-characterbacklitLCDdisplayonthechassis
frontpaneldisplaysstatusandfaultinformationfromtheNIC.Startupdiagnosticscheck
on-boardcomponentsandfirmwareoneverysystempower-onorreset(hardorsoft).The
NICismountedbehindandisintegraltothetop-mostfrontpanel(behindtheLCD
display).
2.0HARDWAREINTERFACE
2.1Powersupply
TheNICreceivesthesystem-widehighfrequencybusandgeneratesall
requiredboardandLCDdisplaypowerfromusingatransformerand5V
regulators.
2.1.1Highfrequencybu
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