Instruction Manual

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Page18
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GNAV540UserManual
7430‐0808‐01Rev.B
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Measurement Accuracy
Attitude
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Range:Roll,Pitch±180°,±90°
Accuracy<0.4°
A
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ngularRate Range:Roll,Pitch,Yaw±200°
BiasStabilityinrun<10°/hr
emp<0.02°/sec
BiasStabilityovert
Acceleration InputRange±4g
BiasStabilityinrun<1mg
BiasStabilityovertemp<4mg
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SignalInterface
TheJ1portoftheGNAV540providestheconnectionslistedinTable6below.Detailsofthesignalinterface,
includingI/Opinout,isprovidedin
Chapter3.HardwareInterfaceonpage35.
Table6J1InterfaceConnector
Connection Description
RS422 Therearethreeserialinterfaces(RS422):
•
Mag :c
•
onnecttoexternalMagnetometer
ConnecttoexternalGPS
omputerorhostCPU
GPS:
• User:Connecttoc
Ethernet Connecttouserinterface:
ultIPaddre theunit
Thedefa ssof :192.168.1.2.
PowerInput Labeled1230VDCandGround;connecttoDCpowersource
SoftwareCompatibility
Crossbow’sGNAV540InertialSystemsaregenerallysoftwarecompatiblewiththe440seriesofCrossbowproducts.
TheGNAV540utilizesthe440seriesextensiblecommunicationprotocol,whichisdescribedin
Chapter9.
CommunicatingwiththeGNAV540Unit.
GNAV540Unit
TheGNAV540isCrossbow’sfourthgenerationofMEMS‐basedInertialSystems,buildingonoveradecadeoffield
experience,andencompassingthousandsofdeployedunitsandmillionsofoperationalhoursinawiderangeof
land,marine,airborne,andinstrumentationapplications.
SummaryofGNAV540features:6‐DOFIMU;3‐AxisInternalMagnetometer;DynamicVelocity;DynamicRoll,Pitch
andHea
ding;GPSReceiverforPosition.
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AtthecoreoftheGNAV540unitisarugged6‐DOF(DegreesofFreedom)MEMSinertialsensorcluster.
The6‐DOFMEMSinertialsensorclusterincludesthreeaxesofMEMSangularratesensingandthreeaxesof
MEMSlinearaccelerationsensing.Thesesensorsarebasedonrugged,fieldprovensiliconbulk
micromachiningtechnology.Eachsensorwithintheclusterisindividuallyfactorycalibratedfor