Agilent Technologies N6700 Parallel Connections

2 Installation

30 Series N6700 User’s Guide

Open Sense Leads

The sense leads are part of the output's feedback path. Connect them

in such a way so that they do not inadvertently become open

circuited. The power system includes protection resistors that reduce

the effect of open sense leads during remote-sensing operation. If the

sense leads open during operation, the power system returns to the

local sensing mode, with the voltage at the output terminals

approximately 1% higher than the programmed value.

Over-voltage Protection Considerations

The OVP circuit senses at the main output terminals and not t hrough

the sense terminals. Due to the voltage drop i n the load leads, the

voltage sensed by the OVP circuit could be higher than the voltage

being regulated at the load. Therefore, you must tak e into account the

additional voltage drop in the load leads when setti ng the over-

voltage trip point.

Output Noise Considerations

Any noise picked up on the sense leads will appear at the output

terminals and may adversely affect CV load regulati on. Twist the

sense leads or use a ribbon cable to minimize the pickup of external

noise. In extremely noisy environments it may be necessary to shield

the sense leads. Ground the shield at the power system end only; do

not use the shield as one of the sensing conductors.

The noise specifications in Appendix A apply at the output terminals

when using local sensing. However, voltage transients may be

produced at the load by noise induced in the leads or by load current

transients acting on the inductance and resistance of the load lead. If

it is desirable to keep voltage transient levels to a mi nimum, place an

aluminum or tantalum capacitor, with an approximate value of 10 µF

per foot (30.5 cm) of load lead, right across the load.

Parallel Connections

CAUTION Only connect outputs that have identical voltage and current ratings in parallel.

Connecting outputs in parallel provides a greater cu rrent capability

than can be obtained from a single output.

The following figures show how to connect two outputs in parallel.

The figure on the left illustrates local sensing. If vol tage drop in the

load leads is a concern, the figure on the right shows how to connect

the sense leads directly at the load. Note th at in both cases, the

remote sense terminals must be connected togeth er.

Contents

Main Legal Notices Warranty Manual Editions Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC Certification Safety Notices General WARNING Before Applying Power Ground the Instrument In this Book NOTE Contents Page 1 Quick Reference The Agilent N6700 Modular Power System At a Glance Output Features System Features Model Differences The Front Panel - At a Glance 20.007V 4.004A The Rear Panel At a Glance WARNING Front Panel Display At a Glance Front Panel Keys At a Glance Quick Reference 1 Series N6700 Users Guide 13 Front Panel Menu Reference NOTE Page Quick Reference 1 Series N6700 Users Guide 15 SCPI Command Summary Subsystem Commands NOTE have a corresponding query. Not all commands apply to all models. SCPI Command Description Page Page 1 Quick Reference 18 Series N6700 Users Guide SCPI Command Description Common Commands Command Description Command Description *RST Settings These settings are set by the *RST (Reset) command 2 Installation 2 Installation 20 Series N6700 Users Guide General Information Models Items Supplied Options Inspecting the Unit Installing the Unit Safety Considerations Environment WARNING Page Bench Installation Channel Number NOTE 400 Hz Operation Redundant Ground Requirement Connecting the Line Cord WARNING NOTE Snap-On Ferrite Core Installation Connecting the Outputs WARNING CAUTION + Wire Size WARNING Multiple Loads + + + + Protecting Sensitive Loads from AC Power Switching Transients NOTE NOTE Remote Sense Connections WARNING + CAUTION + Parallel Connections CAUTION Grouping the Outputs ++ NOTE Effect on Specifications Series Connections WARNING CAUTION Setting the Outputs NOTE ++ Effect on Specifications 3 Getting Started Turning the Unit On Selecting an Output Channel Entering an Output Voltage Setting Method 1 Use the Navigation and Arrow Keys Entering a Current Limit Setting Method 1 Use the Navigation and Arrow Keys Using the Front Panel Menu Set the Over-Voltage Protection NOTE Exiting the Command Menu In Case of Trouble Connecting to the Interfaces CAUTION GPIB Interface NOTE USB Interface NOTE LAN Interface NOTE Connecting to a Site LAN NOTE Connecting to a Private LAN NOTE LAN Parameters Viewing the Currently Active LAN Settings Configuring the LAN Parameters NOTE IP Name Domain DNS NOTE TCP LAN Communication Using the Web Server NOTE Using Telnet Using Sockets NOTE Securing the Interfaces Enable/Disable the USB, LAN, and Web Server Password-Protecting the Interfaces, Factory Settings, and Calibration Restoring the Non-volatile Factory Settings Page 4 Operating the Power System Programming the Output Select an Output Channel Set the Output Voltage Set the Voltage Slew Rate NOTE Set the Output Current Enable the Output Sequence Multiple Outputs Program the Output Relays NOTE Synchronizing Output Steps Enable the Output to Respond to Trigger Commands NOTE Set the Voltage or Current Trigger Levels Select the Transient Trigger Source NOTE Initiate the Transient Trigger System Trigger the Output Generate Trigger Out Signals Making Measurements Simultaneous Voltage and Current Measurements Measurement Ranges Using the Protection Functions Set the Over-Voltage Protection Set the Over-Current Protection Couple Output Protection Clear Output Protection Functions System-Related Operations Self-Test Instrument Identification Instrument State Storage Output Groups NOTE Front Panel Keys Lockout NOTE NOTE Keys Front Panel Display Screen Saver Contrast View Programming High-Speed Test Extensions NOTE The List Function NOTE Program an Output Pulse or Pulse Train Page Program an Arbitrary List NOTE Page The Digitizer Function NOTE Programming the Digitizer Adjust the Measurement Sample Rate Acquire Pre-trigger Data NOTE Specify a Window Function Retrieve Measurement Array Data Synchronizing Digitizer Measurements Select the Measurement Function to Trigger Select the Measurement Trigger Source NOTE Initiate the Measurement Trigger System Trigger the Measurement Appendix A Specifications Agilent Models N6751A/N6752A, N6753A/N6754A, N6761A/N6762A Performance Specifications Supplemental Characteristics Supplemental Characteristics (continued) Autoranging Characteristic Output Impedance Graphs Model N6752A, CC Mode, @50V, 2A Model N6762A, CV Mode, @50V, 2A Model N6752A, CV Mode, @50V, 2A Model N6753A, CV Mode, @20V, 15A Model N6753A, Option 760, CV Mode, @20V, 15A Model N6753A, Option 760, CC Mode, @20V, 15A Model N6753A, CC Mode, @20V, 15A Model N6754A, Option 760, CV Mode, @60V, 5A Model N6754A, CV Mode, @60V, 5A Model N6754A, Option 760, CC Mode, @60V, 5A Model N6754A, CC Mode, @60V, 5A Agilent Models N6731B - N6736B and N6741B - N6746B Performance Specifications Page Agilent Models N6773A - N6776A Performance Specifications Page Appendix A Specifications 86 Series N6700 Users Guide Agilent N6700B, N6701A, N6702A MPS Mainframes N6700B, N6701A, N6702A Command Processing Time: Protection Response Characteristics: Digital Control Characteristics: Interface Capabilities: Supplemental Characteristics (continued) N6700B, N6701A, N6702A Environmental Conditions Acoustic Noise Declaration: Power Available to Modules: V AC Input: Outline Diagram = AIRFLOW Appendix B Using the Digital Port NOTE Digital Control Port NOTE Configuring the Digital Control Port Bi-directional Digital I/O Digital Input External Trigger Fault Output Inhibit Input Fault/Inhibit System Protection Clearing a System Protection Fault NOTE Output State Appendix C Power Allocation NOTE Power Limit Operation Mainframe Power Limit NOTE Module Power Limit NOTE Module Power Allocation NOTE Page Appendix D Output On/Off Synchronization NOTE Synchronizing Output Turn-on Delays Tutorial NOTE Procedure 1. Enable the Synchronization Function 2. Specify which Output Channels will be Synchronized 3. Specify the Turn-On Delays for each Output Channel 4. Specify the Common Delay Offset NOTE Synchronizing Multiple Mainframes Procedure Digital Connections and Configuration NOTE Operation Index Page Page DECLARATION OF CONFORMITY Manual Updates