34938A Simplified Schematic | Agilent Technologies Switch/Measure

General Purpose Switch Modules

6

34938A 20-Channel High-Current GP Switch

The 34938A high- channel GP switch module provides twenty 5 A Form A relays for general purpose switching needs. You can set the power- failure state for these 5 A relays. See page 164 and page 165.

	N O TE	A temperature sensor on these modules triggers system interrupts
	N O TE	when high-carry current-induced heat on the modules reaches a

		threshold of 70 oC.

34938A Simplified Schematic

NO

COM

Channel 001

(5 A Form A Relay)

NO

COM

Channel 020

(5 A Form A Relay)

34980A User’s Guide

171

Image 183

Agilent Technologies Switch/Measure manual 34938A 20-Channel High-Current GP Switch, 34938A Simplified Schematic

Contents

Agilent 34980A Multifunction Switch/Measure Unit Page Manual Part Number General Additional Safety Notices Declaration of Conformity Page Contents Measurement Units Gpib Interface USB Interface LAN Interface Firmware RevisionSelf-Test Relay Cycle Count Scpi Language Version Low Frequency Multiplexer Switch Modules Matrix Switch Modules General Purpose Switch Modules34938A 20-Channel High-Current GP Switch 34951T Terminal Block Simplified Schematics Introduction to the 34980A Front Panel at a Glance Rear Panel at a Glance Rear Panel Connector Pinouts External Trigger Input Connector Male D-SubAnalog Bus Connector Female D-Sub HOT Annunciator Display Indicators DMM Front Panel Menu Reference View Instrument Rack Mounting Introduction to the 34980A Is located inside the rear cover of this manual Mx+B Scaling Scanning Monitor Mode Scpi Language Conventions Rules for Using a Channel List Routclos @10302005,1911 General Measurement Configuration Stand-Alone DMM ModeOverview of Measurement Modes Remote Interface Operation Scanning Mode Specified channels independent of the present scan list Which measurement mode you wish to useIf you specify a chlist, the MEASure? command performs a Scan list Analog Buses Analog Bus connector as viewed from rear of instrument Function Measurement Functions Measurement Range Front Panel Operation DMM or Channel Configure Range Measurement Resolution Custom A/D Integration Time PLC Autozero Front Panel Operation DMM or Channel Configure Auto Zero Trigger delay Trigger Delay Resistance, RTD, Thermistor 2- and 4-wire Automatic Trigger Delays U T I O N Safety Interlock User-Defined Channel Labels Module Configure Clear LABELS? YES Front Panel Operation Channel Configure Channel Label Front Panel Operation Module Configure Mode Next POWER-ON Wire Versus 1-Wire Mode 2nd Edition Analog Bus and Internal DMM ConsiderationsEnvironmental Operating Conditions Occurs. The pollution has no influence on insulation IEC Module inputs Electrical Operating ConditionsTransients High Energy Sources Temperature Measurement Configuration Temperature transducers supportedMeasurement Units Type thermocouple Thermocouple Measurements Thermocouple Type Bejknrst RO 100 OHM DMM or Channel Configure Temperature Probe Type RTD4W RTDRTD Measurements RTD Type Thermistor Measurements DMM or Channel Configure Temperature Probe Type Thermistor Voltage Measurement Configuration DC Input ResistanceDC input resistance Front Panel Operation DMM or Channel Configure AC Filter AC Low Frequency FilterAC low frequency filter Resistance Measurement Configuration Front Panel Operation DMM or Channel Configure Offset CompOffset Compensation Current Measurement Configuration Frequency Measurement Configuration Low Frequency TimeoutLow frequency timeout Scaled Reading = Gain x Measurement + Offset Mx+B Scaling DMM or Channel Configure Scaling Gainoffsetunits Rules for Scanning Scanning 34980A User’s Guide Scan Configure Clear Scan LIST? YES Adding Channels to the Scan ListTo Build a Scan List From the Front Panel To Build a Scan List From the Remote Interface Scan Trigger Source Interval ScanningTrigger-to-trigger interval Front Panel Operation Scan Configure Interval Scan Interval Front Panel Operation Scan Configure Interval ManualManual Scanning External Scanning Ext Trig Input connector as viewed from rear of instrument Trigger Count Front Panel Operation Scan Configure Interval External Front Panel Operation Scan Configure Sweep Count Sweep CountSweep count Sample count for Stand-Alone DMM Mode Sample count for Scanning ModeSample Count Front Panel Operation Scan Configure Sample Count Channel delay Channel Delay Front Panel Operation Channel Configure Channel Delay Time Automatic Channel Delays Front Panel Operation Channel Configure Channel Delay Auto Reading Format Relative Format Default Non-Sequential Scanning Viewing Readings Stored in Memory Front Panel Operation View Readings Monitor Mode Front Panel Operation DMM or Channel Measure System-Related Operations Firmware RevisionFront Panel Operation Utility Firmware Revisions Product Firmware Updates Instrument State Storage Error Conditions Front Panel Operation View Error Queue Front-Panel Display Control Self-Test Front-Panel Number Format This feature is available from the front panel only Relay Cycle Count Real-Time System Clock Scpi Language Version Front Panel Operation Utility Calibrate Unsecure Calibration OverviewCalibration Security To Unsecure the Instrument for Calibration Front Panel Operation Utility Calibrate SET CAL Code To Secure the Instrument for CalibrationTo Change the Security Code Front Panel Operation Utility Calibrate Secure Front Panel Operation Utility Calibrate Count Calibration Count Front Panel Operation Utility Calibrate CAL Message Calibration Message Which is shipped with your 34980A Remote Interface Configuration Front Panel Operation Utility Remote I/O Gpib Gpib Address Gpib InterfaceUSB Interface LAN Interface Agilent 34980A Web Interface 34980A Web Browser Interface IP Address Utility Remote I/O LAN LAN Settings Modify Dhcp Auto-IP Utility Remote I/O LAN LAN Settings Modify Dhcp OFF Subnet Mask Utility Remote I/O LAN LAN Settings Modify Dhcp OFF Auto IP Default Gateway Host Name Utility Remote I/O LAN LAN Settings Modify . . . Host Name DNS Server Domain Name Factory Reset State Factory Reset State Module Hardware Factory Reset State Preset State Instrument Preset State Module Hardware Preset State Features and Functions Introduction to the Plug-In Modules for the 34980A Means This Slot and Channel Addressing Scheme Interconnection Solutions Overview Module Considerations General ConsiderationsAdjacent channels WA RN I N G Before they reach the module or the Analog Buses 40/80-Channel Optically-Isolated FET Multiplexer Low Frequency Multiplexer Switch Modules Modules Low Frequency Multiplexer Switch ModulesOn the module of interest MUX modules with Analog Bus connections have Analog Bus Measurement Functions for the MUX Modules Opening and Closing Channels Scpi Programming Examples for the MUX Modules Making Measurements Mode or 34923A-1W single-ended mode Configuring a ModuleQuerying and Clearing Cycle Count, and Resetting Modules When using a command to configure the system, the new Resets a module in slot 4 to its power- on state Simultaneously 34980A User’s Guide 103 COM 34921A Simplified Schematic Bank 34921A D-Sub Connectors 34921T Terminal Block All modules that connect to the internal DMM are interlockFurther information 34922A 70-Channel Armature Multiplexer 34922A Simplified Schematic 34922A D-Sub Connectors Shorted to enable the Bank 2 Analog Bus relays to close. 34922T Terminal Block Two-Wire Mode 34923A 40/80-Channel Reed MultiplexerTo take effect Schematics on page 114 Four-Wire ModeOne-Wire Mode Wire resistance measurements in 1-wire mode 34923A Simplified Schematic for Two- or Four-Wire Mode 34980A User’s Guide 115 34923A D-Sub Connectors for Two- or Four-Wire Mode Match the present module configuration 34923T-001 Terminal Block for Two- or Four-Wire Mode Analog Buses 34923A Simplified Schematic for One-Wire Mode 34923A D-Sub Connectors for One-Wire Mode Present module configuration 34923T-002 Terminal Block for One-Wire Mode 34924A 70-Channel Reed Multiplexer 122 34924A Simplified Schematic 34924A D-Connectors 34980A User’s Guide 125 34924T Terminal Block 34925A 40/80-Channel Optically-Isolated FET Multiplexer Two-WireReverse, you must cycle power on the 34980A for Configuration to take effect Overvoltage Protection Four-WireOne-Wire Interlock Protection 34980A User’s Guide 129 COM 34925A Simplified Schematic for Two- or Four-Wire Mode 34925A D-Sub Connectors for Two- or Four-Wire Mode 34925T-001 Terminal Block for Two- or Four-Wire Mode 34925A Simplified Schematic for One-Wire Mode 34925A D-Sub Connectors for One-Wired Mode 34925T-002 Terminal Block for One-Wire Mode 136 Matrix Switch Modules Have interlock pins on only their Bank 2 connectors Matrix Switch Modules 2437 Scpi Programming Examples for the Matrix Modules Although the previous two examples show the same channel DerivationMatrix 4 connect to the Analog Buses Reading Cycle Count and Resetting Modules to Power-On State For the 34933A will be either 34933A differential mode or34933A-1W single-ended mode Wiring Multiple 34931A or 34932A Modules Wiring Multiple 34933A ModulesLinking Multiple Matrix Modules 34980A User’s Guide 143 34931A Dual 4x8 Armature Matrix Are connecting matrices Matrix 34931A Simplified Schematic Matrix 34931A D-Sub Connectors See page 138 for further information 34931T Terminal Block For use with the 34931A module. See the following drawing 34932A Dual 4x16 Armature Matrix Matrix 34932A Simplified Schematic Module is facing you 34932A D-Sub Connectors 34932T Terminal Block 34933A Dual/Quad 4x8 Reed Matrix 154 34933A Simplified Schematic for Two-Wire Mode 34933A D-Sub Connectors for Two-Wire Mode Doesnt match the present module configuration 34933T-001 Terminal Block for Two-Wire Mode Connects to 34933A Simplified Schematic for One-Wire Mode Matrices 3 Matrices 1 Buses. See page 138 for further information 34933T-002 Terminal Block for One-Wire Mode 162 General Purpose Switch Modules Relays General Purpose Switch Modules 34980A User’s Guide 165 Reading Jumper State and System Identity 34937A and 34938A Scpi Programming Examples Command resets a module in slot 4 to its power- on state 34937A 32-Channel GP Switch 34937A Simplified SchematicThreshold of 70 oC Channel 34937A D-Sub Connectors Microsoft Excel or Adobe Acrobat format 34937T Terminal Block 34938A Simplified Schematic 34938A 20-Channel High-Current GP Switch Channel Pin Pins 34938A D-Sub Connectors 34938T Terminal Block 174 Simplified Schematic RF Multiplexer Switch Modules 34941A and 34942A RF Multiplexer Switch Modules Installing SMA Connectors Isolating Connector BanksImmediately prior to installing a cable on that connector 34941A and 34942A Scpi Programming Examples DIAGnosticRELayCYCLes? @6101,6202 34941A and 34942A Simplified Schematic 180 Dual/Triple Microwave Switch Modules 34946A and 34947A Scpi Programming Examples 34946A and 34947A Dual/Triple Microwave Switch Modules DIAGnosticRELayCYCLes? @6201 34946A and 34947A Simplified Schematics Module 34951A Scpi Programming Examples Channel Isolated D/A Converter with Waveform Memory Module Remote-sensing terminals H Sense and L Sense Recommended that you use remote-sensing. However, if Module’s Clock Out cannot drive the line at the same time Signal. However, both a user-supplied external clock Signal is detected on ABus1 Level Mode Waveform Mode34951A Scpi Programming Examples External Clock Default security code is AT34980 External TriggerAuto Calibration Using this command will erase any downloaded waveforms Configuring a DAC Module Internal to the 34951A Module User-Supplied Connections 34951A Simplified Schematics Internal to the 34951A Module 34951A D-Sub Connector Pinout 34951T Terminal Block 196 Multifunction Module Multifunction Module with DIO, D/A, and Totalizer Totalizer Input Enabled state, effectively creating a gate always condition34952A Multifunction Module Digital Input/Output 34952A Scpi Programming Examples Digital Input/OutputTotalizer DAC Output Configuring a Multifunction Module DIO 34952A Simplified Schematic Pin Sub Connector 34952T Terminal Block