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Agilent Technologies U2751A DIAGnosticRELayCYCLesCLEar @chlist, There are 32 relays as shown

Models: U2751A

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Service Information

Separate the carrier and measurement board.

There are 32 relays as shown.

Turn to the opposite side of the measurement board and ensure that only the defective relays are desoldered.

Upon replacing the relay(s), reset the relay cycle count to zero by issuing the following SCPI command:

DIAGnostic:RELay:CYCLes:CLEar (@<ch_list>)

U2751A User’s and Service Guide

Page 63

Image 63

Agilent Technologies U2751A manual DIAGnosticRELayCYCLesCLEar @chlist, Separate the carrier and measurement board

Contents

Agilent Technologies User’s and Service GuideAgilent U2751A USB Modular Switch Matrix C A U T I O N WarrantySafety Notices NoticesU2751A User’s and Service Guide Safety SymbolsWA R N I N G General Safety InformationEnvironmental conditions Environmental ConditionsU2751A User’s and Service Guide C A U T I O NRegulatory Markings The affixed product label is as shown below Waste Electrical and Electronic Equipment WEEE Directive 2002/96/ECDo not dispose in domestic household waste Product Category3 Characteristics and Specifications In This Guide…VIII 2 Operation and FeaturesU2751A User’s and Service Guide U2751A User’s and Service Guide Declaration of Conformity DoCN O T E http//regulations.corporate.agilent.com/DoC/search.htmProduct Dimensions ContentsGeneral Maintenance InstallationProduct Specifications Chassis InstallationPower Up Switch ControlU2922A pin configuration Figure 1-1. 25-pin male DSub connectorU2922A dimensions Switch matrix conceptU2751A User’s and Service Guide List of Tables attached data sheetattached data sheet continued Electrical and mechanical specifications update perU2751A User’s and Service Guide Chassis Installation U2751A USB Modular Switch Matrix User’s and Service GuideInstallation U2751A DSub Connector1 Getting Started IntroductionBumpers Product at a GlanceProduct Outlook Top ViewFront View USB indicator Power indicator DSub connector55-pin backplane connector USB inlet Power inlet25.00 mm Product DimensionsDimensions Without Bumpers 105.00 mm 175.00 mmU2751A User’s and Service Guide Dimensions With Bumpers117.00 mm 180.00 mm 41.00 mmU2751A User’s and Service Guide Standard Purchase ItemsElectrical Check Inspection and MaintenanceGeneral Maintenance Initial InspectionN O T E Installation and ConfigurationInstallation U2751A User’s and Service GuideA. Check Your System 1 Getting StartedHard-disk space 1 GB U2751A User’s and Service Guide B. Install the IO Libraries SuiteIf you do not have the Agilent Automation-Ready CD, obtain the IO Disconnect any USB instruments or connectivity interface from your PCC. Install the Module Driver N O T E1 Getting Started U2751A User’s and Service Guide D. Install the Agilent Measurement ManagerN O T E 1 Getting Started10 Fill in the Customer Information Form accordingly and click Next Yes, this time only and click Next to proceed E. Connect the Module to Your PCU2751A User’s and Service Guide N O T E1 Getting Started U2751A User’s and Service GuideGo to Start Control Panel and double-click System Select Ignore to disable the warning messageU2751A User’s and Service Guide N O T E8 The Assign USB device alias window will appear. Each time the U2751A is plugged in, this dialog box will appear. To 1 Getting Started10 The U2751A can also be connected remotely to the PC U2751A User’s and Service GuideN O T E N O T EF. Verify Your Module Connection Send Commands To This Instrument1 Getting Started N O T E The IO Control will launch automatically when you start your PCG. Launch Your Agilent Measurement Manager U2751A User’s and Service Guide1 Getting Started For more information on how to use the Measurement Manager, refer toU2751A User’s and Service Guide N O T ETable 1-1 Pin assignments U2751A DSub ConnectorFigure 1-1 25-pin male DSub connector Pin Assignments1 Getting Started Figure 1-2 U2922A pin configurationU2922A Terminal Block N O T ERetractable cover Female DSub connectorFigure 1- 3 and Figure 1 Terminal block90.00 mm 105.00 mm Figure 1-4 U2922A dimensionsSide View 85.00 mm 23.00 mmunexpected hazard U2922A Terminal Block InstallationThe maximum transient voltage is 300 Vrms terminal block during operation to avoid anySnap-fit clasp of the retractable cover and the housingJack screws of the U2922A 1 Getting StartedU2751A User’s and Service Guide 55-Pin Backplane Connector Pin ConfigurationFigure 1-5 55-pin backplane connector pin configuration description1 Getting Started Chassis InstallationSCPI Commands for System-Related Tasks Operation and FeaturesPower Up Switch Control2 Operation and Features Power UpSwitch Control Figure 2-1 Switch matrix conceptU2751A User’s and Service Guide Agilent Measurement Manager Operation Figure 2-2 Panel view of the Agilent Measurement Manager2 Operation and Features Example 3, Make contact at channel 101 SCPI CommandsExample 1, Make contact at channel Example 2, Break contact at channelAgilent Measurement Manager Operation Relay Cycle CounterFigure 2-3 Panel view of the relay cycle counter 2 Operation and FeaturesU2751A User’s and Service Guide Error ConditionsSystem-Related Operation Self-TestSCPI Commands for System-Related Tasks Example 4, Performing system-related tasks2 Operation and Features Agilent Technologies Characteristics and SpecificationsU2751A USB Modular Switch Matrix User’s and Service Guide Product Characteristics Product SpecificationsSAFETY COMPLIANCE Product Characteristics3 Characteristics and Specifications POWER CONSUMPTIONInput characteristics per channel Product SpecificationsCharacteristics and Specifications U2751A User’s and Service GuideGeneral characteristics 3 Characteristics and SpecificationsU2751A USB Modular Switch Matrix User’s and Service Guide Service InformationChecking Defective Relays Replaceable Parts Disassembly Instructions Reassembly Instructions Contacting Agilent Technologies4 Service Information Checking Defective RelaysN O T E Disassemble the instruments in a static-free work area only Electrostatic Discharge ESD PrecautionsReplaceable Parts deviceRemove the screws and nuts as shown Disassembly Instructions4 Service Information U2751A User’s and Service GuideSeparate the carrier and measurement board DIAGnosticRELayCYCLesCLEar @chlistU2751A User’s and Service Guide Service InformationN O T E N O T E Reassembly InstructionsTypes of Service Available Contacting Agilent TechnologiesIndex Index Contact us Agilent Technologies