Agilent Technologies 66001A Output Connections, Selecting the Proper Wire Size, Resistance Ω/ft

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Output Connections

Before making the actual connections, you must decide on the system configuration. The following factors are described in the rest of this chapter:

■using the correct wire size

■maintaining isolation guidelines

■selecting local or remote voltage sensing

■connecting modules in series or in parallel

■using output relays

■connecting to capacitive or inductive loads

Selecting the Proper Wire Size

Fire Hazard. To satisfy safety requirements, load wires must be large enough not to overheat when carrying the short-circuit output current of the device connected to the power module. See Table 2-2 for the characteristics of AWG (American Wire Gage) copper wire.

Table 2-2. Current Capacity and Resistance of Stranded Copper Conductors

AWG No.

20

18

16

14

*Ampacity

8.33

15.4

19.4

31.2

**Resistance

(Ω/m Ω/ft)

0.0345 0.01054

0.0217 0.00663

0.0137 0.00417

0.0086 0.00262

AWG No. *Ampacity

1240

*In free air

**Resistance

(Ω/m Ω/ft)

0.0054

0.00165

**At 20 °C

 

Output Isolation

The output connector ground terminal is a low-noise ground provided for convenience, such as for grounding wire shields. This terminal is not designed to function as an equipment safety ground.

The power module output terminals are isolated from earth ground. If required, either output terminal may be grounded.

The potential between either output terminal and ground must not exceed ±240 Vdc. Failure to observe this restriction may damage the power module.

Local Voltage Sensing

Figure 2-4A shows the load connection for local sensing. There is a switch on the output connector that selects either local or remote sensing of the output voltage. The connector is shipped with the switch in the LOCAL position. In order to configure the output for local sensing, make certain this switch is set to LOCAL.

Note The position of the Local/Remote switch also can be determined by software (see

VOLT:SENS:SOUR? in "Chapter 3 - Language Dictionary" of the Programming Guide).

With local sensing, the power module voltage readback circuit senses the voltage at the output terminals. Since this does not compensate for voltage drops in the terminal screw connections and output leads, use Local sensing only in applications requiring low output currents or where the load regulation is not critical.

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Contents Agilent Part No Microfiche Part No September USER’S GuideCertification Safety Summary Printing History Symbol DescriptionHerstellerbescheinigung Manufacturers DeclarationManufacturer’s Name and Address USAModel Numbers a 66000A Page Table of Contents Using the Agilent 66001A MPS Keyboard Basic Power Module CommandsItem Description Option DescriptionGeneral Information Accessories Programming Accuracy @ calibration temperature ± 5 C Specifications and Supplemental CharacteristicsOutput Ratings Readback AccuracyPerformance Specifications Parameter Supplemental Characteristics ParameterAgilent Model 66101A 66102A 66103A 66104A 66105A 66106A Remote Sensing Capability 66101A 66102A Agilent Model 66103A 66104A 66105A 66106ADimensions Recommended Calibration Interval Safety ComplianceWeight Downprogramming Monotonicity Gpib Interface CapabilitiesOutput Characteristic Curve Supplemental CharacteristicsReplaceable Parts List Description Agilent Part No Parameter Agilent Model Number and Parameter ValuePage Installation SwitchesInspection Power Module Line Fuse and Switches Switch Setting RI Action Remote Inhibit RI Function SwitchesDisplay Function Switch Calibration Function SwitchesInstalling The Module In The Mainframe Connecting The LoadOutput Connector Output Connections Selecting the Proper Wire SizeResistance Ω/ft AWG No. *AmpacityVoltage Readback Remote Voltage SensingOutput Rating Output NoiseParallel Operation Voltlev Outp OFFVoltprot Currlev Voltlev Voltprot Currlev MAX Outp onCapacitive Loads Multiple LoadsBattery Charging Connecting The ControllerInductive Loads OVP ConsiderationsTurn-On Checkout Power Module Front Panel DisplayIntroduction Module Panel DisplayPower Module Turn-On State Checking Basic Module FunctionsAddr Dis Prot Error Messages Module Output ConnectorCase Of Trouble Mainframe FailureRuntime Error Messages Selftest Error MessagesMessages DisplaySynopsis Of Commands Basic Power Module CommandsGpib Controller MPS KeyboardPower Module Output Commands Function CommandPower Module Protection Commands Function Power Module Fixed-Mode Output CommandsPower Module Trigger Commands Function Power Module List-Mode Output CommandsControlling List-Mode Output Controlling TriggersUsing the RI/DFI Functions RI Remote Inhibit Input Changing The Power On StateDFI Discrete Fault Indicator Output Command DFI Output Commands FunctionCalibration Changing The Calibration PasswordEnabling Or Disabling The Calibration Function Performing a CalibrationEquipment Required Table A-2. Voltage Calibration ProcedureCalibrating Voltage Keyboard Entry Controller Entry † FunctionDisable the output Table A-3. Current Calibration ProcedureCalcurrlev MIN Calcurrlev MAXRecovering From a Lost Calibration Password Recovering The Factory Calibration ConstantsCalibration Error Messages Agilent Basic Calibration ProgramInitialize Power Supply Assign Power Supply Gpib AddressPassword is Optional only 10 ! Voltage Calibration ProgramPrint Current Calibration not Saved END ifElse Print Current Calibration CompleteUsing The Agilent 66001A MPS Keyboard Connecting The KeyboardAgilent 66001A MPS Keyboard Meter Area Keyboard DescriptionAnnunciators Agilent 60001A MPS Keyboard System Keys  Letter Keys Using The Display Changing or Entering ValuesDisplaying Status Command Example Sending Scpi CommandsQuery Example Error Example Scpi Command Tree Agilent 60001A MPS Keyboard Addr IndexProt Unr AmpsShift SRQ Tlk Lsn ProtScpi InitMeas VOLT?, 32 Outp Agilent Sales and Support Office Agilent Sales and Support OfficesManual Updates
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