Page 1
User’s Guide
K
eysight Series N5700
System DC Power
Supply
Page 2
Page 3
Page 4
Legal Notices
© Keysight Technologies 2004 - 2014
No part of this document may be
photocopied, reproduced, or translated to
another language without the prior
agreement and written consent of
Keysight Technologies as governed by
United States and international copyright
laws.
Warranty
The material contained in this document
is provided “as is,” and is subject to
being changed, without notice, in future
editions. Further, to the maximum extent
permitted by applicable law, Keysight
disclaims all warranties, either express or
implied, with regard to this manual and
any information contained herein,
including but not limited to the implied
warranties of merchantability and fitness
for a particular purpose. Keysight shall
not be liable for errors or for incidental or
consequential damages in connection
with the furnishing, use, or performance
of this document or of any information
contained herein. Should Keysight and
the user have a separate written
agreement with warranty terms covering
the material in this document that conflict
with these terms, the warranty terms in
the separate agreement shall control.
Manual Editions
Manual Part Number: 5969-2917
Edition 7, August 2014.
Reprints of this manual containing minor
corrections and updates may have the
same printing date. Revised editions are
identified by a new printing date.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight products
may be downloaded from the Web. Go to
http://regulations.products.keysight.com
and click on “Declarations of Conformity.”
You can then search by product number
to find the latest Declaration of
Conformity.
Waste Electrical and
Electronic Equipment (WEEE)
Directive 2002/96/EC
This product complies with the WEEE
Directive 2002/96/EC) marketing
requirement. The affixed product label
(see below) indicates that you must not
discard this electrical/electronic product
in domestic household waste.
Product Category: With reference to the
equipment types in the WEEE directive
Annex 1, this product is classified as
“Monitoring and Control instrumentation”
product.
Do not dispose in domestic household
waste.
To return unwanted products, contact our
local Keysight office, or see
http://www.keysight.com/environment/
product for more information.
Certification
Keysight Technologies certifies that this
product met its published specifications
at time of shipment from the factory.
Keysight Technologies further certifies
that its calibration measurements are
traceable to the United States National
Institute of Standards and Technology, to
the extent allowed by the Institute's
calibration facility, and to the calibration
facilities of other International Standards
Organization members.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE
THE CUSTOMER'S SOLE AND EXCLUSIVE
REMEDIES. KEYSIGHT TECHNOLOGIES
SHALL NOT BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER
BASED ON CONTRACT, TORT, OR ANY
OTHER LEGAL THEORY.
Assistance
This product comes with the standard
product warranty. Warranty options,
extended support contacts, product
maintenance agreements and customer
assistance agreements are also available.
Contact your nearest Keysight
Technologies Sales and Service office for
further information on Keysight
Technologies' full line of Support
Programs.
Technologies Licenses
The hardware and or software described
in this document are furnished under a
license and may be used or copied only in
accordance with the terms of such
license.
Restricted Rights Legend
Software and technical data rights
granted to the federal government include
only those rights customarily provided to
end user customers. Keysight provides
this customary commercial license in
Software and technical data pursuant to
FAR 12.211 (Technical Data) and 12.212
(Computer Software) and, for the
Department of Defense, DFARS 252.2277015 (Technical Data – Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or
Computer Software Documentation).
Trademarks
Microsoft and Windows are U.S.
registered trademarks of Microsoft
Corporation.
4 Series N5700 User’s Guide
Page 5
Safety Notices
Both direct and alternating
current
current
potential.
equipment
equipment.
is off
switch
push switch
documents
CAUTION
WARNING
The following general safety precautions
must be observed during all phases of
operation of this instrument. Failure to
comply with these precautions or with
specific warnings or instructions
elsewhere in this manual violates safety
standards of design, manufacture, and
intended use of the instrument. Keysight
Technologies assumes no liability for the
customer's failure to comply with these
requirements.
General
Do not use this product in any manner
not specified by the manufacturer. The
protective features of this product may be
impaired if it is used in a manner not
specified in the operation instructions.
Before Applying Power
Verify that all safety precautions are
taken. Make all connections to the unit
before applying power. Note the
instrument's external markings described
under "Safety Symbols"
Ground the Instrument
This product is a Safety Class 1
instrument (provided with a protective
earth terminal). To minimize shock
hazard, the instrument chassis and cover
must be connected to an electrical
ground. The instrument must be
connected to the ac power mains through
a grounded power cable, with the ground
wire firmly connected to an electrical
ground (safety ground) at the power
outlet. Any interruption of the protective
(grounding) conductor or disconnection of
the protective earth terminal will cause a
potential shock hazard that could result in
personal injury.
Fuses
The instrument contains an internal fuse,
which is not customer accessible.
Do Not Operate in an Explosive
Atmosphere
Do not operate the instrument in the
presence of flammable gases or fumes.
Do Not Remove the Instrument
Cover
Only qualified, service-trained personnel
who are aware of the hazards involved
should remove instrument covers. Always
disconnect the power cable and any
external circuits before removing the
instrument cover.
Do Not Modify the Instrument
Do not install substitute parts or perform
any unauthorized modification to the
product. Return the product to a Keysight
Sales and Service Office for service and
repair to ensure that safety features are
maintained.
In Case of Damage
Instruments that appear damaged or
defective should be made inoperative and
secured against unintended operation
until they can be repaired by qualified
service personnel
A CAUTION notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
could result in damage to the product
or loss of important data. Do not
proceed beyond a CAUTION notice
until the indicated conditions are fully
understood and met.
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or the
like that, if not correctly performed
or adhered to, could result in
personal injury or death. Do not
proceed beyond a WARNING notice
until the indicated conditions are
fully understood and met.
Safety Symbols
Direct current
Alternating current
Three phase alternating
Earth (ground) terminal
Protective earth ground
terminal.
Frame or chassis terminal
Terminal is at earth
Neutral conductor on
permanently installed
Line conductor on
permanently installed
On supply
Off supply
Standby supply. Unit is not
completely disconnected
from ac mains when switch
In position of a bi-stable push
Out position of a bi-stable
Caution, risk of electric shock
Caution, hot surface
Caution, refer to
accompanying
Series N5700 User’s Guide 5
Page 6
In this Book
This User’s Manual contains the operating instructions, installation
instructions, and specifications of the Keysight Technologies Series
N5700 750W and 1500W System DC Power Supplies. Specific
chapters in this manual contain the following information:
Quick Reference – Chapter 1 is a quick reference section that
helps you quickly become familiar with your Keysight N5700
power supply.
Installation – Chapter 2 describes how to install your power
supply. It describes how to connect various loads to the output. It
discusses remote sensing as well as parallel and series operation.
Operating the Power Supply Locally – Chapter 3 describes how to
operate the power supply from the front panel and from the
analog connector on the rear panel. It also includes a turn-on
check-out procedure to verify the unit is operating properly.
Operating the Power Supply Remotely – Chapter 4 describes how
to configure the remote interfaces. It also gives a brief overview
of the SCPI command structure and basic programming concepts.
Language Reference – Chapter 5 describes all of the SCPI
programming commands.
Programming Examples – Chapter 6 provides Visual BASIC
example programs that illustrate some common applications.
NOTE
Specifications – Appendix A describes specifications and
supplemental characteristics.
Verification and Calibration Procedures – Appendix B explains
the verification and calibration procedures.
Service – Appendix C describes what to do if your unit requires
service.
Compatibility – Appendix D documents the compatibility
commands of the Keysight 603xA power supplies that are
supported by the Keysight N5700 power supplies.
You can contact Keysight Technologies at one of the following telephone
numbers for warranty, service, or technical support information.
In the United States: (800) 829-4444
In Europe: 31 20 547 2111
In Japan: 0120-421-345
Or use our Web link for information on contacting Keysight in your country or
specific location: www.keysight.com/find/assist
Or contact your Keysight Technologies Representative.
The web contains the most up to date version of the manual. Go to
http://www.keysight.com/find/N5700 to get the latest version of the manual.
6 Series N5700 User’s Guide
Page 7
Contents
1 Quick Reference ................................................................................................................................. 9
The Keysight N5700 DC Power Supplies – At a Glance ............................. 10
The Front Panel - At a Glance ......................................................................... 12
The Rear Panel – At a Glance ......................................................................... 14
2 Installation......................................................................................................................................... 17
General Information .......................................................................................... 18
Inspecting the Unit ........................................................................................... 19
Installing the Unit .............................................................................................. 19
Connecting the Line Cord ................................................................................ 21
Connecting the Load ......................................................................................... 23
Output Voltage Sensing ................................................................................... 26
Load Considerations ......................................................................................... 28
Parallel Connections ......................................................................................... 30
Series Connections ........................................................................................... 32
J1 Connector Connections .............................................................................. 34
3 Operating the Power Supply Locally ............................................................................................. 35
Turn-On Check-Out ........................................................................................... 36
Normal Operation .............................................................................................. 38
Protection Functions ........................................................................................ 39
Output On/Off Controls.................................................................................... 42
Analog Programming of Output Voltage and Current ................................. 44
4 Operating the Power Supply Remotely .......................................................................................... 49
Connecting to the Interfaces .......................................................................... 50
SCPI Commands – an Introduction ................................................................ 59
5 Language Reference ........................................................................................................................ 65
SCPI Command Summary ................................................................................ 66
Calibration Commands
..................................................................................... 68
Measure Commands......................................................................................... 69
Output Commands ............................................................................................ 70
Source Commands ............................................................................................ 71
Status Commands ............................................................................................. 73
Series N5700 User’s Guide 7
System Commands ........................................................................................... 79
Trigger Commands ............................................................................................ 81
Page 8
6 Programming Examples ................................................................................................................... 83
Output Programming Example ........................................................................ 84
Trigger Programming Example ........................................................................ 86
A Specifications ................................................................................................................................... 89
Performance Specifications ............................................................................ 90
Supplemental Characteristics ......................................................................... 91
Outline Diagram ................................................................................................. 93
B Verification and Calibration............................................................................................................ 95
Verification ......................................................................................................... 96
Calibration ........................................................................................................ 115
C Service .............................................................................................................................................117
Types of Service Available............................................................................. 118
Repackaging for Shipment............................................................................. 118
Operating Checklist ......................................................................................... 118
Error Messages ............................................................................................... 120
D Compatibility...................................................................................................................................125
Differences – In General ................................................................................ 126
Compatibility Command Summary ............................................................... 127
Index ........................................................................................................................................................... 129
8 Series N5700 User’s Guide
Page 9
1
Quick Reference
The Keysight N5700 DC Power Supplies – At a Glance ............................. 10
The Front Panel - At a Glance ......................................................................... 12
The Rear Panel – At a Glance ......................................................................... 14
This chapter concisely describes the Keysight Technologies Series
N5700 Power Supplies.
This chapter is not meant to describe every operating feature in
detail. It is simply a quick reference guide to quickly become familiar
with the essential components of the power supply. It can also be
used as a memory jogger for experienced users to quickly find a
front/rear panel function.
A quick reference programming command chart is included in the
beginning of chapter 5.
Series N5700 User’s Guide 9
Page 10
1 Quick Reference
The Keysight N5700 DC Power Supplies – At a Glance
The Keysight Technologies Series N5700 System DC Power Supplies
are general-purpose, 1U (rack unit) high, switching power supplies
that are available with a wide variety of output voltage and current
ratings.
These power supplies are power-factor corrected and operate from a
worldwide AC voltage range. Output voltage and current are
continuously displayed and LED indicators show the complete
operating status of the power supply.
The front panel controls allow the user to set the output parameters,
over-voltage, under-voltage, and over-current protection levels, and
preview the settings.
The rear panel includes the necessary connectors to control and
monitor the power supply operation by analog signals or by the builtin remote communication interfaces.
Output Features
System Features
• Constant voltage/constant current with automatic crossover.
• High-resolution voltage and current front panel controls.
• Accurate voltage and current readback.
• Independent edge-triggered external shut-off, and level-
triggered external enable/disable.
• Parallel master/slave operation with active current sharing.
• Remote sensing to compensate for voltage drop in load leads.
• Analog output programming and monitoring.
• Built-in GBIB/LAN/USB interface.
• A built-in Web server that lets you control the instrument
directly from an internet browser on your computer.
• Zero-gap stacking - no ventilation holes at the top and bottom
surface of the power supply.
• Universal input voltage with active power factor correction.
• Fan speed control for low noise and extended fan life.
10 Series N5700 User’s Guide
Page 11
Programmable Functions
• Output voltage and current setting.
• Output voltage and current measurement.
• Output voltage and current trigger setting.
• Output On/Off control.
• Over-current protection setting.
• Over-voltage protection setting and readback.
• Under-voltage limit setting and readback.
• Start-up mode (either last setting or reset mode)
• Status register setting and readback.
• Bus trigger
• Calibration
Model Ratings
Quick Reference 1
Model Voltage
Range
N5741A 0 – 6V 0 – 100A N5761A 0 – 6V 0 – 180A
N5742A 0 – 8V 0 – 90A N5762A 0 – 8V 0 – 165A
N5743A 0 – 12.5V 0 – 60A N5763A 0 – 12.5V 0 – 120A
N5744A 0 – 20V 0 – 38A N5764A 0 – 20V 0 – 76A
N5745A 0 – 30V 0 – 25A N5765A 0 – 30V 0 – 50A
N5746A 0 – 40V 0 – 19A N5766A 0 – 40V 0 – 38A
N5747A 0 – 60V 0 – 12.5A N5767A 0 – 60V 0 – 25A
N5748A 0 – 80V 0 – 9.5A N5768A 0 – 80V 0 – 19A
N5749A 0 – 100V 0 – 7.5A N5769A 0 – 100V 0 – 15A
N5750A 0 – 150V 0 – 5A N5770A 0 – 150V 0 – 10A
N5751A 0 – 300V 0 – 2.5A N5771A 0 – 300V 0 – 5A
N5752A 0 – 600V 0 – 1.3A N5772A 0 – 600V 0 – 2.5A
Minimum output voltage is ≤ 0.2% of the rated output voltage.
Minimum output current is ≤ 0.4% of the rated output current.
Current
Range
Model Voltage
Range
Current
Range
Series N5700 User’s Guide 11
Page 12
1 Quick Reference
VOLTAGE
PROT
FINE
LIMIT/
OVP
UVL
OCP/488 LAN
OUT ON
DC AMPS
CURRENT
DC VOLTS
POWER
1
14
17
18
19
2
15
16
3
13
10
4
11
5
12
9
6
7
8
CV
CC
The Front Panel - At a Glance
1 – VOLTAGE knob Voltage function
: Adjusts the output voltage, the over-voltage protection level, and the
under-voltage limit. If over-voltage protection or under-voltage limits have been set,
you cannot program the output voltage outside those limits.
GPIB address: Selects the GPIB address when OCP/488 is pressed and held.
2 – CV indicator When lit, indicates that the unit is operating in constant voltage mode – with the
output voltage being held constant.
3 – DC VOLTS display LED display that normally displays the voltage measured at the sense terminals.
When LIMIT is pressed, the display indicates the programmed voltage setting.
When OVP/UVL is pressed, the display indicates either the OVP or UVL setting.
When OCP/488 is pressed and held, the display indicates the GPIB address.
When LAN is pressed and held, the display indicates the IP and Ethernet address.
4 – DC AMPS display LED display that normally displays the current measured at the output terminals.
When LIMIT is pressed, the display indicates the programmed current setting.
When LAN is pressed and held, the display indicates the IP and Ethernet address.
5 – CC indicator When lit, indicates that the unit is operating in constant current mode – with the
output current being held constant.
6 – CURRENT knob Adjusts the output current.
7 – OUT ON button Output function
and turn the output on after an OVP or OCP event has occurred.
Start-up function: Selects between Safe-Start and Auto-Restart modes. Press and hold
the OUT ON button to toggle between Safe-Start and Auto-Restart. The display cycles
between SAF and AU7. Releasing the OUT ON button while one of the modes is
displayed selects that mode.
8 – OUT ON indicator When lit, indicates that the output is enabled or on.
12 Series N5700 User’s Guide
: Press OUT ON to turn the output on or off. Press OUT ON to reset
Page 13
Quick Reference 1
9 – LAN button View address
: Press LAN to view the IP and Ethernet address. The display first scrolls
through the four segments of the IP address, followed by the six segments of the
Ethernet (EA) address. Press any key to turn the address display off.
Reset address: Press and hold the LAN button for three seconds. Pressing the LAN
button again while the message “LAn rES” is displayed resets the LAN configuration
to the factory-shipped settings (see chapter 4 for settings). If the key is not pressed
again, the display returns to normal and the configuration is not changed.
10 – LAN indicator When lit, indicates that the LAN has been configured and is operating normally.
When blinking, identifies the unit for which the indicator has been set to blink by the
unit’s Web home page.
11 – OCP/488 button Enable OCP
: Press OCP/488 to turn over-current protection on. Press OCP/488 again
to turn over-current protection off.
Reset OCP: When an over-current protection event occurs, press the OUT ON button
to enable the output and re-arm over-current protection.
GPIB address: Press and hold the OCP/488 button for three seconds. This lets you set
the GPIB address with the Voltage knob.
12 – OCP indicator When lit, indicates that over-current protection is enabled or on.
13 – OVP/UVL button OVP function
: Press OVP/UVL once to set the over-voltage protection level with the
Voltage knob (the display shows OUP). You cannot set the over-voltage protection
lower than about 5% above the present output voltage setting.
UVL function: Press OVP/UVL twice to set the under-voltage programming limit with
the Voltage knob (the display shows UUL). You cannot set the under-voltage
protection higher than about 5% below the present output voltage setting.
14 – LIMIT button Limit function: Press LIMIT to display the output voltage and current limit. For five
seconds the display shows the settings and then it returns to show the actual output
voltage and current.
Lock function: Press and hold the LIMIT button to toggle between Locked front panel
and Unlocked front panel. The display will cycle between LFP and UFP. Releasing the
LIMIT button while one of the modes is displayed selects that mode.
If the display
indicates rLFP, the front panel has been locked by a remote programming command.
15 – LIMIT indicator When lit, indicates that the LIMIT button is pressed.
16 – FINE button Selects Fine or Coarse adjustment control. In Fine mode, the Voltage and Current
knobs operate with high resolution; in Coarse mode, with lower resolution
(approximately six turns).
17 – FINE indicator When lit, indicates that the unit is in Fine adjustment mode.
18 – PROT indicator When blinking, indicates that a fault has occurred.
OVP, OCP, OTP, Enable fail, and AC fail detection will cause the PROT indicator to
blink.
The PROT indicator may blink and the display indicate AC for a few seconds after
the unit is turned off because of residual
energy inside the unit.
19 – POWER switch Turns the power supply on or off.
Series N5700 User’s Guide 13
Page 14
1 Quick Reference
9
5
7 3
8
4
6
1
2
750W
1500W
6V - 60V
80V - 600V
AC INPUT
ON
OFF
+V -V
NOT ACTIVE
J2
SW1
GPIB
ANALOG PROGRAMMING
+S+LS NC -LC-S
1 2 3 4 5 6 7 8 9
10/100 Ethernet
LINK
TX
J1
! !
The Rear Panel – At a Glance
1 – AC input connector Wire clamp connector for 1500W output models.
IEC connector for 750W output models.
2 – DC output connector Wire clamp connector for 80V to 600V models.
3 – USB connector Connector for connecting to a USB interface. See chapter 4 for setup.
4 – LAN connector Connector for connecting to a LAN interface. LINK LED indicates link integrity.
5 – Analog Programming
connector
6 – SW1 setup switch Nine-position switch for selecting remote programming and monitoring modes
7 – Remote Sense connector Connector for making remote sensing connections for regulating the load
8 – GPIB connector Connector for connecting to a GPIB interface. See chapter 4 for setup.
9 – Ground screw M4x8 screws for making chassis ground connections
WARNING
Bus bars for 6V to 60V models.
TX LED indicates LAN activity. See chapter 4 for LAN setup.
Connector for the analog interface. Includes output voltage and current limit
programming and monitoring signals, Shut-Off control (electrical signal),
Enable/Disable control (dry-contact), power supply ok (Power Supply OK) signal
and operation mode (CV/CC) signal. (See next page for details)
for Output Voltage, Current Limit and other control functions. (See next page for
details)
voltage and compensating for wiring voltage drop. (See next page for details)
SHOCK HAZARD The power cord provides a chassis ground through a third
conductor. Be certain that your power outlet is of the three-conductor type
with the correct pin connected to earth ground
14 Series N5700 User’s Guide
Page 15
J2 Sense Connector
1
2
3
4
5
6
7
8
9
1 – Remote sense (+)
2 – Local sense (+)
3 – Not used
4 – Local sense (–)
5 – Remote sense (–)
The factory-shipped configuration is shown in the figure.
SW1 Setup Switch
Quick Reference 1
The factory-shipped setting is Down for all switches.
1 – Output voltage, voltage
programming
2 – Output current, voltage
programming
3 – Programming range
(voltage/resistance)
4 – Voltage and Current
monitoring range
: The output voltage is programmed by the front panel.
Down
Up: The output voltage is programmed by the external voltage signal.
Down: The output current is programmed by the front panel.
Up: The output current is programmed by the external voltage signal.
Down: The remote programming range is: 0 – 5V / 0 – 5KΩ.
Up: The remote programming range is: 0 – 10V / 0 – 10KΩ.
Down: The remote monitoring range is: 0 – 5V.
Up: The remote monitoring range is: 0 – 10V.
5 – Shut-Off Logic Select Down: OUT OFF = Low (0 – 0.6V) or short; OUT ON = High (2V – 15V) or open.
Up: OUT OFF = High (2V – 15V) or open; OUT ON = Low (0 – 0.6V) or short.
6 – Not Used
7 – Output voltage, resistive
programming
8 – Output current, resistive
programming
Down
: The output voltage is programmed by the front panel.
Up: The output voltage is programmed by the external resistor.
Down: The output current is programmed by the front panel.
Up: The output current is programmed by the external resistor.
9 – Enable/Disable control Down: The J1 Enable+/Enable– pins are not active.
Up: The J1 Enable+/Enable– pins are active.
Series N5700 User’s Guide 15
Page 16
1 Quick Reference
14
15
16
17
18
19
2021
2223
24
25
1
2
3
45
6
7
8
101112
13 9
Current Monitor
Current Prog
.
Return
Voltage Prog. Return
Local / Analog State
Chassis Common
Enable IN
Voltage Monitor
Common (-S)
CV
/
CC
Current Program
Voltage Program
Local
/
Analog
Parallel
Enable OUT
Shut Off
Power Supply OK
Chassis Common
J1 Analog Programming Connector
The factory-shipped default configuration is Local operation, which
does not require connection to J1.
Pin 1: Enable IN Connect Pin 1 to Pin 14 to enable the output. Disconnect to disable the output.
Pin 2, 3: Chassis Common Signal return for Pin 15 and Pin 16. Connected to chassis.
Pin 4–7: Not Used No connection
Pin 8: Local/Analog Input for selecting between front panel or analog programming of the output.
Pin 9: Voltage Program Input for voltage or resistance programming of the output voltage.
Pin 10: Current Program Input for voltage or resistance programming of the output current.
Pin 11: Voltage Monitor Output for monitoring the output voltage.
Pin 12: Common Signal return for Pin 8, Pin11, Pin 13, and Pin 24. Connected internally to –S.
Pin 13: CV/CC Output for constant voltage/constant current mode indication.
Pin 14: Enable OUT Connect Pin 14 to Pin 1 to enable the output. Disconnect to disable the output.
Pin 15: Shut Off Input for Shut-Off control of the output. Referenced to Chassis Common.
Pin 16: Power Supply OK Output to indicate the power supply status. Referenced to Chassis Common.
Pin 17–20: Not Used No connection
Pin 21: Local/Analog State Output for indication of local or analog programming mode.
Pin 22: Voltage Prog. Return Signal return for Pin 9. Connected internally to –S.
Pin 23: Current Prog. Return Signal return for Pin 10. Connected internally to –S.
Pin 24: Current Monitor Output for monitoring the output current.
Pin 25: Parallel Output for current balancing in parallel operation.
16 Series N5700 User’s Guide
Page 17
2
Installation
General Information .......................................................................................... 18
Inspecting the Unit ........................................................................................... 19
Installing the Unit .............................................................................................. 19
Connecting the Line Cord ................................................................................ 21
Connecting the Load ......................................................................................... 23
Output Voltage Sensing ................................................................................... 26
Load Considerations ......................................................................................... 28
Parallel Connections ......................................................................................... 30
Series Connections ........................................................................................... 32
J1 Connector Connections .............................................................................. 34
This chapter describes how to install your power supply. It discusses
installation, rack mounting, and line cord connections.
This chapter also discusses how to connect your load to the output
terminals. It discusses what you need to know about wire sizes and
how to compensate for voltage drops in the load leads. It also
discusses various loads configurations and how to connect units in
series and parallel.
Before getting started, check the list under “Items Supplied” and
verify that you have received these items with your instrument. If
anything is missing, please contact your nearest Keysight Sales and
Service Office.
Series N5700 User’s Guide 17
Page 18
2 Installation
Hardware
Nuts, washers, and bolts for connecting load leads to output
General Information
Models
Items Supplied
750 W Models 1500 W Models
N5741A – N5749A N5761A – N5769A
N5750A – N5752A N5770A – N5772A
Item Description
Power Cord A power cord appropriate for your location
750W units are supplied with terminated power cords
1500W units are supplied with unterminated power cords
Strain relief assembly A strain relief assembly for unterminated power cords
(only used for 1500W units)
AC input cover A cover for the AC input on which the strain relief assembly
is mounted (only used for 1500W units)
Analog connector A DB25 subminiature connector plug for analog control
connections
Shield assembly A safety shield for the output terminal connections
Accessories
bus bars (only used for 6V to 60V units)
Documentation Set Contains User’s Guide with Product Reference CD-ROM
Certificate of Calibration A certificate of calibration referenced to the serial number
Automation-Ready
CD-ROM
Item Description
N5740A Rack-mount slide kit for installing in system II cabinets
E2094N - contains Keysight IO Libraries Suite
18 Series N5700 User’s Guide
Page 19
Inspecting the Unit
Installing the Unit
Safety Considerations
Installation 2
When you receive your power supply, inspect it for any obvious
damage that may have occurred during shipment. If there is damage,
notify the shipping carrier and nearest Keysight Sales and Service
Office immediately. Refer to Appendix C for more information.
Until you have checked out the power supply, save the shipping
carton and packing materials in case the unit has to be returned.
This power supply is a Safety Class 1 instrument, which means it has
a protective earth terminal. That terminal must be connected to
earth ground through power source equipped with a ground
receptacle. Refer to the Safety Summary page at the beginning of this
guide for general safety information. Before installation or
operation, check the power supply and review this guide for safety
warnings and instructions. Safety warnings for specific procedures
are located at appropriate places throughout this Guide.
Environment
WARNING
NOTE
Airflow
Do not operate the instrument in the presence of flammable gasses or fumes
The environmental conditions, dimensions of the instrument, as well
as an outline diagram are given in Appendix A. Basically, the
instrument should only be operated indoors in a controlled
environment. Do not operate the power supply in an area where the
ambient temperature exceeds 40° C.
Keysight N5700 power supplies generate magnetic fields, which may affect the
operation of other instruments. If your equipment is susceptible to magnetic
fields, do not position it adjacent to the power supply.
Fans cool the power supply by drawing air through the front and
exhausting it out the back. The instrument must be installed in a
location that allows sufficient space of at least 10 cm (4 in) at the
front and back of the unit for adequate air circulation.
Series N5700 User’s Guide 19
Page 20
2 Installation
Rack Installation
CAUTION
Ensure that the screws used to attach the rack slide kit do not penetrate more
than 6 mm into the sides of the unit.
Do not block the air intake at the front, or the exhaust at the rear of the unit.
The Keysight N5700 power supplies can be mounted in a standard 19inch rack panel or cabinet. They are designed to fit in one rack unit
(1U) of space. To install the power supply in a rack:
1. Use the front panel rack-mount brackets to install the power
supply in the rack.
2. Use a support bracket to provide adequate support for the rear of
the power supply.
3. If using rack mount slides, use Keysight N5740A Rack-mount Slide
Kit to install the unit in a standard 19-inch equipment rack. Refer to
the following figure for assembly instructions. Use two #10-32 x 3/8
in (max.) screws at each side. To prevent internal damage, use the
specified screw length only.
Cleaning
WARNING
20 Series N5700 User’s Guide
SHOCK HAZARD To prevent electric shock, unplug the unit before cleaning.
Use a dry cloth or one slightly dampened with water to clean the
external case parts. Do not attempt to clean internally.
Page 21
Connecting the Line Cord
The detachable power cord may be used as an emergency disconnecting device.
Installation 2
WARNING
SHOCK HAZARD The power cord provides a chassis ground through a third
conductor. Be certain that your power outlet is of the three-conductor type
with the correct pin connected to earth ground.
FIRE HAZARD Use only the power cord that was supplied with your
instrument. Using other types of power cords may cause overheating of the
power cord, resulting in fire.
NOTE
Removing the power cord will disconnect ac input power to the unit.
The AC input on the back of your unit is a universal AC input. It
accepts line voltages in the range of 85 VAC to 265 VAC. The
frequency range is 47 Hz to 63 Hz.
The input current requirement of 750W units is 10.5A @ 100 VAC
nominal and 5A @ 200 VAC nominal. The current requirement of
1500W units is 21A @ 100 VAC nominal and 11A @ 200 VAC nominal.
Input Connections for 750W units
Connect the power cord to the IEC 320 connector on the rear of the
unit. The IEC connector provides the safety ground connection when
the AC cord is plugged into a grounded AC receptacle.
If the wrong power cord was shipped with your unit, contact your
nearest Keysight Sales and Service Office.
Input Connections for 1500W units
CAUTION
Connection of this power supply to an AC power source should be made by a
qualified electrician or other qualified personnel.
The AC input connector is a 3-terminal wire clamp located on the
rear panel. Use suitable wires and tightening torque as follows:
• Wire diameter: 12 AWG or 10 AWG
• Tightening torque: 6.5 - 7.0 in-lb
Connect the cable to the AC input connector as follows:
• Strip the outside insulation of the AC cable approximately 10
cm (4 in). Trim the wires so that the ground wire is 10 mm
(0.4 in) longer than the other wires. Strip 14 mm (0.55 in) at
the end of each of the wires.
Series N5700 User’s Guide 21
Page 22
2 Installation
L
N
Cover
Assembled
Strain Relief
M3 x 8mm
Pan Head Screws
(2 places)
• Unscrew the base of the strain relief from the wire
compression nut. Place the locknut inside the AC input cover
with the flat side of the nut against the cover. Insert the base
through the outside opening of the AC input cover. Screw the
base securely onto the locknut from the outside (17 ft-lbs).
• Slide the wire compression nut over the AC cable. Insert the
stripped wires through the strain relief base until the outer
cable jacket is flush with the inside edge of the base. Place a
wrench on the base to keep it from turning. Now tighten the
compression nut to the base (14-16.2 ft-lbs) while holding the
cable in place. Now the cable is securely fastened inside the
strain relief. Refer to the following figure.
• Route the AC wires to the input connector terminals as
required. To connect the wires, loosen the terminal screw,
insert the stripped wire into the terminal, and tighten the
screw securely to between 4.4–5.3 in-lbs.
• Route the wires inside the cover to prevent pinching. Fasten
the cover to the unit using the M3 x 8mm pan head screws
provided (4.8 in-lbs). Refer to the following figure for details.
22 Series N5700 User’s Guide
Page 23
Connecting the Load
To satisfy safety requirements, select a wire size heavy enough
Ω
14
2.526
80
40
20 8 2
12
1.589
120
60
30
12
3.4
10
0.9994
200
100
50
20
6
8
0.6285
320
160
80
32
10 6 0.3953
500
250
125
50
16
4
0.2486
800
400
200
80
26
2
0.1564
1200
600
300
125
40
0
0.0983
2000
1000
500
200
68
Installation 2
WARNING
Wire Size
WARNING
SHOCK HAZARD Turn off AC power before making rear panel connections.
All wires and straps must be properly connected with screws securely
tightened.
As further explained in this section, the following factors should be
considered when selecting wiring to connect the load to the power
supply:
• Current carrying capacity of the wire
• Insulation rating of the wire should be at least equivalent to
the maximum output voltage of the power supply
• Maximum wire length and voltage drop
• Noise and impedance effects of the load wiring
FIRE HAZARD
not to overheat while carrying the power supply load current at the rated
load, or the current that would flow in the event the load wires were shorted,
whichever is greater.
Along with conductor temperature, you must also consider voltage
drop when selecting wire sizes. The following chart lists the
resistance for various wire sizes and also the maximum lengths to
limit the voltage drop to 1.0 volt for various currents.
Although the power supply will compensate for up to 5V in each load
wire, it is recommended to minimize the voltage drop to less than 1V
to prevent excessive output power consumption from the power
supply and poor dynamic response to load changes.
Wire size
AWG
Resistance
/1000 foot
Maximum length in feet to limit voltage to 1 V
for 5 A for 10 A for 20A for 50A for 150A
Series N5700 User’s Guide 23
Page 24
2 Installation
Ω
2.5
8.21
24.0
12.0
6.0
2.4
0.8
4
5.09
39.2
18.6
9.8
4.0
1.4
6
3.39
59.0
29.4
14.8
5.8
2.0
10
1.95
102
51.2
25.6
10.2
3.4
16
1.24
160
80.0
40.0
16.0
5.4
25
0.795
250
125
62.0
25.2
8.4
35
0.565
354
177
88.0
35.4
11.8
connections when using a power supply with a rated output greater than 40V.
ensure that the load and its connections have no accessible live parts. Ensure
that the load wiring insulation rating is greater than or equal to the maximum
M8x15 screw (2 places)
Hex Nut (2 places)
Flat washer (2 places)
Spring washer (2 places)
Wire terminal lug (2 places)
Flat washer
(2 places)
Screws tightening torque: 104-118 in-lb.
Cross
section
(mm2)
Resistance
/kilometer
Maximum length in meters to limit voltage to 1 V
for 5 A for 10 A for 20A for 50A for 150A
Load Connections for 6V to 60V Models
WARNING
CAUTION
SHOCK HAZARD Hazardous voltages may exist at the outputs and the load
To protect personnel against accidental contact with hazardous voltages,
output voltage of the power supply.
Ensure that the load wiring mounting hardware does not short the output
terminals. Heavy connecting cables must have some form of strain relief to
prevent loosening the connections or bending the bus-bars.
All load wires should be properly terminated with wire terminals
securely attached. Do not use unterminated wires for load
connections at the power supply. The following figures illustrate how
to connect the load wires to the power supply bus-bars as well as
how to mount the bus-bar shield to the chassis.
24 Series N5700 User’s Guide
Page 25
Install the shield after you have finished connecting the load wires.
en using a power supply with a rated output greater than 40V.
ensure that the load and its connections have no accessible live parts. Ensure
greater than or equal to the maximum
Wire Size:
AWG 18 to AWG 10
Stripping Length:
10 mm (0.39 in.)
Torque:
6.5 - 7 in-lb.
Shield
Load wires
Negative (-)
Output/Return
Positive Output (+)
+V
-V
Load Connections for 80V to 600V Models
Installation 2
WARNING
SHOCK HAZARD Hazardous voltages may exist at the outputs and the load
connections wh
To protect personnel against accidental contact with hazardous voltages,
that the load wiring insulation rating is
output voltage of the power supply.
The 80V to 600V models have a four-terminal wire clamp output
connector. The two left terminals are the positive outputs and the
two right terminals are the negative outputs. The connector
specifications are as follows:
The following instructions describe how to connect the load wires to
the power supply:
• Strip wires back approximately 10 mm (0.39 in).
• Loosen the connector terminal screws and insert the stripped
wires into the terminal. Tighten the terminal screw securely.
Series N5700 User’s Guide 25
Page 26
2 Installation
A
A
Load
wires
1 Remote sense (+)
2 Local sense (+)
3 Not connected
4 Local sense (-)
5 Remote sense (-)
• Loosen the two chassis screws marked A halfway.
• Assemble the protective shield to the chassis and tighten the
two screws to fix the shield to the chassis. Screw tightening
torque: 4.8-5.3 in-lb
• Tighten the wires to one of the shield sides using tie-wrap or
equivalent. Refer to the following figure.
• Ensure that the wire length inside the shield is long enough
to provide proper strain relief.
Output Voltage Sensing
WARNING
SHOCK HAZARD There is a potential shock hazard at the sense connector
when using a power supply with a rated output greater than 40V. Ensure that
the local sense and remote sense wiring insulation rating is greater than or
equal to the maximum output voltage of the power supply. Ensure that the
connections at the load end are shielded to prevent accidental contact with
hazardous voltages.
Local and remote sense connections are made at the J2 connector.
The connector has a removable plug that makes it easy for you to
make your wire connections. Refer to the following figure for the
terminal assignments.
26 Series N5700 User’s Guide
Page 27
Plug Type:
MC 1.5/5-ST-3.81, Phoenix
Wire Size:
AWG 28 to AWG 16
Stripping Length:
7 mm (0.28 in.)
Torque:
0.22 – 0.25 Nm (1.95 – 2.21 in-lb.)
Local Sensing
-
-
Rem.sense
Local sense
Local sense
Rem.sense
+
Load lines, twisted
pair, shortest length
possible.
+V
-V
Load
+
Power
Supply
+
Error
Amp.
Installation 2
The J2 connector plug specifications are as follows:
The power supply is shipped with the rear panel J2 sense connector
wired for local sensing of the output voltage. With local sensing, the
output voltage regulation is made at the output terminals. This
method does not compensate for voltage drop on the load wires,
therefore it is recommended only for low load current applications or
where the load regulation is less critical. The following figure
illustrates the internal connections of the J2 connector.
NOTE
Remote Sensing
If the power supply is operated without the local sense jumpers or without the
remote sense lines connected, it will continue to work, but the output voltage
regulation will be degraded. Also, the OVP circuit may activate and shut down
the power supply. Note that the internal wiring between +V and + local sense
and between –V and – local sense will fail if load current flows through it.
Use remote sensing in applications where load regulation at the load
is critical. Remote sensing allows the power supply to automatically
compensate for the voltage drop in the load leads. Refer to Appendix
A for the maximum allowable voltage drop on the load wires.
Remote sensing is especially useful in constant voltage mode with
load impedances that vary or have significant lead resistance. It has
no effect in constant current mode. Because sensing is independent
of other power supply functions it can be used regardless of how the
power supply is programmed. With remote sensing, voltage readback
monitors the load voltage at the remote sense points.
Use twisted or shielded wires to minimize noise pick-up. If shielded
wires are used, the shield should be connected to the ground at one
point, either at the power supply chassis or the load ground. The
optimal point for the shield ground should be determined by
experimentation.
Series N5700 User’s Guide 27
Page 28
2 Installation
-
-
Rem.sense
Local sense
ocal sense
Rem.sense
+L
+
Load lines, twisted pair,
shortest length possible.
+V
-V
Load#1
+
Load#3
+
Load#2
+
Power
Supply
-
-
Rem.sense
Local sense
ocal sense
Rem.sense
+L
+
Sense lines.
Twisted pair or
+V
-V
Load
+
Power
Supply
Load lines. Twisted pair
shortest length possible.
shielded wires.
To configure the power supply for remote sensing:
• Turn off the power supply.
• Remove the local sense jumpers from the J2 connector.
• Connect the negative sense lead to terminal 5 (-S) and the
positive sense lead to terminal 1 (+S). Make sure that the
connector plug is securely inserted into the connector body.
• Turn on the power supply.
NOTE
Load Considerations
Multiple Loads
28 Series N5700 User’s Guide
If the power supply is operated with remote sensing and either the positive or
negative load wire is not connected, an internal protection circuit will activate
and shut down the power supply. To resume operation, turn the power supply
off, connect the open load wire, and turn on the power supply.
The following figure shows multiple loads connected to one power
supply. Each load should be connected to the power supply’s output
terminals using separate pairs of wires. It is recommended that each
pair of wires will be as short as possible and twisted or shielded to
minimize noise pick-up and radiation. The sense wires should be
connected to the power supply output terminals or to the load with
the most critical load regulation requirement.
Page 29
If remotely located distribution terminals are used, as shown in the
-
-
Rem.sense
Local sense
ocal sense
Rem.sense
+L
+
Distribution terminal
+V
+V
-V
-V
Load#1
+
Load#3
+
Load#2
+
Power
Supply
following figure, the power supply output terminals should be
connected to the remote distribution terminals by a pair of twisted
and/or shielded wires. Connect each load to the distribution
terminals separately. Remote voltage sensing is recommended under
these circumstances. Sense either at the remote distribution
terminals or, if one load is more sensitive than the others, directly at
the critical load.
Output Noise and Impedance Effects
Installation 2
Inductive Loads
To minimize the noise pickup or radiation, the load wires and remote
sense wires should be twisted-pairs to the shortest possible length.
Shielding of sense leads may be necessary in high noise
environments. Where shielding is used, connect the shield to the
chassis via a rear panel ground screw. Even if noise is not a concern,
the load and remote sense wires should be twisted-pairs to reduce
coupling, which might impact the stability of power supply. The sense
leads should be separated from the power leads.
Twisting the load wires reduces the parasitic inductance of the cable,
which could produce high frequency voltage spikes at the load and
the output because of current variation in the load itself.
The impedance introduced between the power supply output and the
load could make the ripple and noise at the load worse than the noise
at the power supply rear panel output. Additional filtering with
bypass capacitors at the load terminals may be required to bypass the
high frequency load current.
Inductive loads can produce voltage spikes that may be harmful to
the power supply. A diode should be connected across the output.
The diode voltage and current rating should be greater than the
power supply maximum output voltage and current rating. Connect
the cathode to the positive output and the anode to the negative
output of the power supply.
Series N5700 User’s Guide 29
Where positive load transients such as back EMF from a motor may
occur, connect a surge suppressor across the output to protect the
power supply. The breakdown voltage rating of the suppressor must
be approximately 10% higher than the maximum output voltage of the
power supply.
Page 30
2 Installation
For models greater than 60 VDC rated output, no point on the Negative output
Battery Charging
CAUTION
If a battery or external voltage source is connected across the output and the
output is programmed below the battery or external voltage source, the power
supply will continuously sink current from the external source. This could
damage the power supply.
To avoid damaging the power supply, insert a reverse blocking diode
in series with the + output connection of the power supply. Connect
the diode’s cathode to the + battery terminal or external voltage
source. Connect the diode’s anode to the + output terminal of the
power supply.
Grounding the Output
The output of the power supply is isolated from earth ground. Either
positive or negative voltages can be obtained from the output by
grounding (or "commoning") one of the output terminals. Always use
two wires to connect the load to the output regardless of where or
how the system is grounded.
To avoid noise problems caused by common-mode current flowing
from the load to ground, it is recommended to ground the output
terminal as close as possible to the power supply chassis ground
WARNING
SHOCK HAZARD
For models up to 60 VDC rated output, no point on the output shall be more
than ±60 VDC above or below chassis ground.
.
Parallel Connections
CAUTION
For models greater than 60 VDC rated output, no point on the Positive output
shall be more than ±600 VDC above or below chassis ground.
shall be more than ±400 VDC above or below chassis ground.
Only power supplies that have identical voltage and current ratings can be
connected in parallel.
Up to four units of the same voltage and current rating can be
connected in parallel to provide up to four times the output current
capability. Refer to the following figures for typical connections of
parallel power supplies using either local or remote sensing. The
figures show two units, however, the same connection method
applies for up to four units.
30 Series N5700 User’s Guide
Page 31
Local Sensing
+
V
-
V
+
V
-
V
+S-S
+S-S
MASTER
POWER SUPPLY
SLAVE
POWER SUPPLY
+S
-S
+S
+S
-S
-S
LOAD
J1-25
J1-10
Parallel
Current Program
As short as possible
Twisted
pair
Twisted
pair
Twisted
pair
J1-8
J1-12
+
V
-
V
+
V
-
V
+S+LS-S -LS
+S+LS-S -LS
MASTER
POWER SUPPLY
SLAVE
POWER SUPPLY
LOAD
J1-25
J1-10
Parallel
Current Program
As short as possible
Twisted
pair
J1-8
J1-12
Installation 2
Series N5700 User’s Guide 31
Setting up the Master Unit
Remote Sensing
One of the units operates as a master and the remaining units are
slaves. The slave units operate as controlled current sources
following the master output current. In remote operation, only the
master unit can be programmed by the computer while the slave
units may be connected to the computer for voltage, current and
status readback only.
It is recommended that each unit supplies only up to 95% of its
current rating because of the imbalance that may be caused by
cabling and connections voltage drops.
Connect the sensing circuit for either local or remote sensing as
shown in the previous figures. Set the master unit output voltage to
the desired voltage. Program the current limit to the desired load
current limit divided by the number of parallel units. During
operation, the master unit operates in constant voltage mode,
regulating the load voltage at the programmed output voltage.
Page 32
2 Installation
For models greater than 60 VDC rated output, no point on the Negative output
Setting up the Slave Units
Set the rear panel setup switch SW1 position 2 to it’s up position.
Connect J1 pin 10 (Current Program) of the slave unit to J1 pin 25
(Parallel) of the master unit. Also connect a short between J1 pin 8
and J1 pin 12. The output voltage of the slave units should be
programmed higher than the output voltage of the master unit to
prevent interference with the master unit’s control. The current limit
of each unit should be programmed to the desired load current limit
divided by the number of parallel units.
Setting the Over-Voltage Protection
The master unit OVP should be programmed to the desired OVP level.
The OVP of the slave units should be programmed to a higher value
than the master. When the master unit shuts down, it programs the
slave unit to zero output voltage. If a slave unit shuts down when its
OVP is set lower than the master output voltage, only that unit shuts
down and the remaining slave units will supply all the load current.
Setting the Over-Current Protection
Series Connections
WARNING
CAUTION
Over-current protection, if desired, may only be used with the master
unit. When the master unit shuts down, it programs the slave units to
zero output voltage.
SHOCK HAZARD
For models up to 60 VDC rated output, no point on the output shall be more
than ±60 VDC above or below chassis ground.
For models greater than 60 VDC rated output, no point on the Positive output
shall be more than ±600 VDC above or below chassis ground.
shall be more than ±400 VDC above or below chassis ground.
Only power supplies that have identical voltage and current ratings can be
connected in series.
Two units of the same voltage and current rating can be connected in
series to provide up to two times the output voltage capability.
Because the current is the same through each element in a series
circuit, outputs connected in series must have equivalent current
ratings. Otherwise, the higher rated output could potentially damage
the lower rated output by forcing excessive current through it under
certain load conditions. Refer to the following figures for typical
series connections using either local or remote sensing.
32 Series N5700 User’s Guide
Page 33
Installation 2
Local Sensing
Remote Sensing
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
LOAD
(*)
(*)
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
LOAD
(*)
(*)
(*) Diodes are
user supplied.
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
(*)
(*)
(*) Diodes are user supplied.
It is recommended that diodes be connected in parallel with each
output to prevent reverse voltage during start up sequence or in case
one unit shuts down. Each diode should be rated to at least the rated
output voltage and output current of the power supply.
CAUTION
Series N5700 User’s Guide 33
Refer to the following figure for typical connections of series power
supplies configured as a positive and a negative output.
This caution applies when using analog voltage programming with seriesconnected power supplies. The analog programming circuits of these power
supplies are referenced to the negative sense (-S) potential. Therefore, the
analog voltage circuits used to control each series-connected unit must be
separated and floated from each other.
Page 34
2 Installation
Mating Plug:
AMP part number 745211-2
Wire Size:
AWG 26 to AWG 22
Extraction tool:
AMP part number 91232-1 or equivalent
Head: AMP p/n 58063-1
14151617
18
19
20
21
22
232425
1
2
3
45
6
7
8
10
11
12
13
9
Current Monitor
Current Prog. Re turn
Voltage Prog. Return
Local / Analog State
Chassis Common
Enable +
Voltage Monitor
Common (-S)
CV / CC
Current Program
Voltage Program
Local / Analog
Parallel Enable --
Shut Off
Power Supply OK
Chassis Common
Pins on this side are isolated
from output term inals and are
referenced to chassis ground.
Pins on this side are
referenced to the negative
sense (-S) ter minal.
J1 Connector Connections
WARNING
SHOCK HAZARD There is a potential shock hazard at the J1 connector when
using a power supply with a rated output greater than 40V. Ensure that the
load wiring insulation rating is greater than or equal to the maximum output
voltage of the power supply.
External programming and monitoring signal are located on the J1
connector. The power supply is shipped with a mating plug that
makes it easy for you to make your wire connections. It is essential to
use this plastic-body plug to conform to safety agency requirements.
If a shield is required for the J1 wires, connect the shield to the
ground screw located on the power supply chassis.
Refer to the following figure for the pin assignments. A description of
the pins is given in chapter 1.
CAUTION
34 Series N5700 User’s Guide
The mating plug specifications for the J1 connector are as follows:
Manual pistol grip tool: Handle: AMP p/n 58074-1
Pins 12, 22 and 23 of J1 are connected internally to the negative sense (-S)
potential of the power supply. Do not attempt to bias any of these pins relative
to the negative output terminal. Use an isolated, ungrounded, programming
source to prevent ground loops and to maintain the isolation of the power
supply when programming from J1.
Chapter 3 describes how to configure the J1 connector when using it
to program the output voltage and current.
Page 35
3
Operating the Power Supply Locally
Turn-On Check-Out ........................................................................................... 36
Normal Operation .............................................................................................. 38
Protection Functions ........................................................................................ 39
Output On/Off Controls.................................................................................... 42
Analog Programming of Output Voltage and Current ................................. 44
This chapter contains examples on how to operate your power supply
from the front panel. A check-out procedure is included to let you verify
that the power supply is operating properly. Additionally, information
about programming the power supply using the J1 analog programming
connector is also provided.
The simple examples discussed in this chapter show you how to program:
output voltage and current functions
protection functions
output on/off functions
safe-start and auto-restart
analog programming of voltage and current
front panel locking
Refer to chapters 4 and 5 for information on programming your power
supply using SCPI commands.
Series N5700 User’s Guide 35
Page 36
3 Operating the Power Supply Locally
that
Turn-On Check-Out
Before Turn-On
Ensure that the power supply is configured as follows:
• The unit is connected to the proper AC mains (see chapter 2).
• The POWER switch is in the off position.
• Sense connector pins 1 and 2 are jumpered; sense connector pins
4 and 5 are jumpered.
• All switches on Connector J2 are in the down position.
WARNING
NOTE
SHOCK HAZARD Be aware that hazardous voltages can be present on the
output terminals. Do not set the output voltage above 40 VDC during the turnon check-out procedure. Check to make sure that the startup mode is set to
Safe-Start (see page 42).
Windows CE instruments (instruments manufactured starting in 2014) have a
different turn-on characteristic than previous units. Windows CE units may take
up to 30 seconds to initialize when they are turned on.
Constant Voltage Check
• Turn the POWER switch on.
CAUTION
After the “OFF” is first displayed, you need to allow a few seconds for the unit to
stabilize before you enable the output with the OUT ON button. The output
voltage and current settings may not be at zero during this stabilization time.
Check that the settings are stable by pressing the LIMIT button and verifying
the voltage and current settings indicate zero.
• Turn the output on by pressing the OUT ON button. The green
OUT ON indicator should be illuminated.
• The green CV indicator should also be illuminated. If the CC
indicator is illuminated, rotate the current knob until the CV
indicator becomes illuminated.
• Rotate the voltage knob while observing the DC VOLTS display.
The output voltage should vary while the knob is turned. The
voltage range is from zero to the maximum rated output for the
power supply model.
OVP Check
36 Series N5700 User’s Guide
• Rotate the voltage knob and set the output voltage of the unit to
50% of its full-scale rating or 30 volts, whichever is lower.
• Press the OVP/UVL button once so that the DC AMPS display
indicates OUP. The DC VOLTS display shows the OVP level.
• Use the voltage knob and set the OVP level of the unit to 75% of
its full-scale voltage rating or 40 volts, whichever is lower.
• Wait a few seconds until the DC VOLTS display returns to show
the output voltage.
Page 37
UVL Check
Operating the Power Supply Locally 3
• Use the voltage knob and raise the output voltage of the unit until
it approaches the OVP setting. Check to make sure that the
output voltage cannot be set higher than the OVP setting.
• Press the OVP/UVL button again. Rotate the voltage knob and
reset the OVP level of the unit to its maximum setting.
• Press the OVP/UVL button twice so that the DC AMPS display
indicates UUL. The DC VOLTS display shows the UVL level.
• Use the voltage knob and set the UVL level of the unit to 50% of
its full-scale voltage rating or 30 volts, whichever is lower.
• Wait a few seconds until the DC VOLTS display returns to show
the output voltage.
• Use the voltage knob and lower the output voltage of the unit
until it approaches the UVL setting. Check to make sure that the
output voltage cannot be set lower than the UVL setting.
• Press the OVP/UVL button twice. Rotate the voltage knob and
reset the UVL level of the unit to its minimum setting.
Constant Current Check
• Turn the POWER switch off. Wait a few seconds until the AC
indicator on the front panel goes out.
• Use a heavy wire and short the +V and –V output terminals
together.
• Turn the POWER switch on.
• Turn the output on by pressing the OUT ON button. The green
OUT ON indicator should be illuminated. The green CC indicator
should be also illuminated.
• Rotate the current knob while observing the DC AMPS display.
The output current should vary while the knob is turned. The
current range is from zero to the maximum rated output for the
power supply model.
OCP Check
• Rotate the current knob and set the current limit of the unit to
about 10% of its full-scale current rating.
• Press the OCP/488 button. This should trip the OCP protection.
The OCP indicator should be illuminated, the DC VOLTS display
should indicate OCP, and the Alarm indicator should be blinking.
• Press the OCP/488 button again to cancel OCP protection. The
DC VOLTS display should indicate OFF because the OCP
protection is latched.
• Press the OUT ON button to reset the OCP protection. The output
should return to its previous setting.
• Turn the POWER switch off.
• Remove the short from the +V and –V output terminals.
Series N5700 User’s Guide 37
Page 38
3 Operating the Power Supply Locally
Normal Operation
Constant Voltage Mode
The power supply has two basic operating modes: constant voltage and
constant current mode. In constant voltage mode, the power supply
regulates the output voltage at the selected value, while the load current
varies as required by the load. In constant current mode, the power
supply regulates the output current at the selected value, while the
voltage varies as required by the load. The mode in which the power
supply operates at any given time depends on the voltage setting, current
limit setting, and the load resistance.
When the power supply is operating in constant voltage mode, the CV
indicator on the front panel illuminates.
Adjustment of the output voltage can be made when the output is enabled
(On) or disabled (Off). When the output is enabled, simply rotate the
voltage knob to program the output voltage.
When the output is disabled, press the LIMIT button and then rotate the
voltage knob. The DC VOLTS display will show the programmed voltage
for 5 seconds after the adjustment has been completed and then indicate
OFF.
The voltage knob can be set to coarse or fine resolution. Press the FINE
button to select finer resolution. The FINE indicator turns on.
NOTE
If you cannot adjust the voltage to the value that you desire, the power supply
may be operating at its current limit. Check the load condition and the current
limit setting. Also, the voltage cannot be programmed lower than about 5%
above the UVL setting, or higher than about 5% below the OVP setting.
Constant Current Mode
When the power supply is operating in constant current mode, the CC
indicator on the front panel illuminates.
Adjustment of the output current limit can be made when the output is
enabled (On) or disabled (Off). When the output is enabled and in
constant current mode, simply rotate the current knob to program the
current limit. If the output is in constant voltage mode, press the LIMIT
button and then rotate the current knob. The DC AMPS display will show
the programmed current for 5 seconds after the adjustment has been
completed and then indicate the actual output current.
When the output is disabled, press the LIMIT button and then rotate the
current knob. The DC AMPS display will show the programmed current
for 5 seconds after the adjustment has been completed and then go blank
because the output is off.
38 Series N5700 User’s Guide
The current knob can be set to coarse or fine resolution. Press the FINE
button to select finer resolution. The FINE indicator turns on.
Page 39
CV/CC Mode Crossover
If the power supply is in constant voltage mode and the load current
increases above the current limit setting, the power supply switches to
constant current mode. If the load decreases below the current limit
setting, the power supply switches to constant voltage mode.
CV/CC Signal
Operating the Power Supply Locally 3
CAUTION
Protection Functions
Over-Voltage Protection
Do not connect the CV/CC signal to a voltage source higher than 30VDC.
Always connect the CV/CC signal to the voltage source with a series resistor to
limit the sink current to less than 10mA.
The CV/CC signal available on the J1 connector indicates the operating
mode of the power supply. The CV/CC signal is an open collector output
with a 30V parallel zener at J1 pin 13, referenced to common at J1 pin 12.
J1 pin 12 is connected internally to the –S terminal. When the power
supply operates in constant voltage mode, CV/CC output is open. When
the power supply operates in constant current mode, CV/CC signal
output is low (0 - 0.6V), with maximum 10mA sink current.
The over-voltage protection protects against over-voltage conditions on
the output. If the output voltage attempts to exceed the programmed limit
in response to an analog programming signal or in the event of a power
supply failure, the over-voltage protection circuit will protect the load by
disabling the output. The voltage is monitored at the sense terminals,
thus providing the protection level directly at the load. Upon detection of
an over-voltage condition, the output is disabled, the display shows OVP,
the PROT indicator blinks, and OV is set in the Questionable Condition
status register.
Series N5700 User’s Guide 39
Adjustment of the over-voltage setting can be made when the output is
enabled (On) or disabled (Off). To set the OVP level, press the OVP/UVL
button so that the display indicates OUP. The display will show the OVP
setting. Rotate the voltage knob to adjust the OVP level. The display will
show OVP and the setting value for another five seconds and then return
to its previous state.
The OVP settings are limited at the minimum level to approximately 5%
above the output voltage setting. Attempting to adjust the OVP below this
limit will result in no response to the adjustment attempt. Refer to
Appendix A for the maximum OVP settings.
Use one of the following methods to reset the OVP circuit after it
activates. If the condition that caused the over-voltage shutdown is still
present, the OVP circuit will turn the output off again.
• Press the OUT ON button to turn the output on.
Page 40
3 Operating the Power Supply Locally
Under-Voltage Limit
• Turn the AC power off, wait a few seconds, and turn it on.
• Turn the output off, then on again using the Shut Off pin on the J1
connector. This only applies in Auto-Restart mode.
• If the OVP continues to trip, try lowering the output voltage below
the OVP setting, or raising the OVP setting.
Under-voltage limit is a protection function that prevents adjustment of
the output voltage below a set limit either from the front panel or remote
interface. It does NOT include protection trip circuitry like the overvoltage protection. The combination of UVL and OVP lets you create a
protection window for sensitive load circuitry.
Setting the UVL can be made when the output is enabled (On) or disabled
(Off). To set the UVL level, press the OVP/UVL button twice, so that the
display shows UUL. The display will show the UVL setting. Rotate the
voltage knob to adjust the UVL level. The display will show UUL and the
setting value for another five seconds and then return to its previous
state.
The UVL settings are limited at the maximum level to approximately 5%
below the output voltage setting. Attempting to adjust the UVL above this
limit will result in no response to the adjustment attempt. The minimum
UVL setting is zero.
Over-Current Protection
Over-current protection will shut down the power supply output if the
load current reaches the current limit setting. This protection is useful
when the load is sensitive to an over-current condition.
To arm the over-current protection, press the OCP/488 button so that the
OCP indicator illuminates. When armed, a transition from constant
voltage to constant current mode will activate the over-current
protection. When an over-current protection event occurs, the output is
disabled, the display shows OCP, the PROT indicator blinks, and OC is
set in the Questionable Condition status register.
Use one of the following methods to reset over-current protection after it
activates. If the load current is still higher than the current limit setting,
the over-current protection will be activated again.
• Press the OUT ON button to turn the output on.
• Turn the AC power off, wait a few seconds, and turn it on.
• Turn the output off, then on again using the Shut Off pin on the J1
connector. This only applies in Auto-Restart mode.
• Press the OCP/488 button to cancel over-current protection. The
display will show OFF because OCP protection is latched. Press the
OUT ON button to reset OCP. With this method, the over-current
protection is disabled. If the load current is still higher than the
current limit setting, the power supply will only attempt to limit the
current at the current limit setting.
40 Series N5700 User’s Guide
Page 41
Over-Temperature Protection
The over-temperature protection circuit shuts down the power supply
before the internal components can exceed their safe internal operating
temperature. This can occur if there is a cooling fan failure. When an OTP
condition occurs, the output is disabled, the display shows O7P, the
PROT indicator blinks, and the OT status bit is set in the Questionable
Condition status register. Resetting the OTP circuit can be automatic
(non-latched) or manual (latched) depending on the Safe-Start or AutoRestart mode.
In Safe-Start mode, the OTP circuit is latched. The display continues to
show O7P and the PROT indicator continues to blink. To reset the OTP
circuit, press the OUT ON button.
In Auto-Restart mode, the OTP circuit is non-latched. The power supply
returns to its last setting automatically when the over-temperature
condition is removed.
Power-Fail Protection
If the AC power stops briefly, but returns before the power supply has
reset, the power-fail protection circuit trips and the PF status bit is set in
the Questionable Condition status register. Resetting the power-fail
protection can be automatic (non-latched) or manual (latched),
depending on the Safe-Start or Auto-Restart mode.
Operating the Power Supply Locally 3
In Safe-Start mode, the output of the power supply is Off, as specified by
the reset state when AC power returns. In Auto-Restart mode, the power
supply recovers its last settings when AC power returns.
Front Panel Lock-Out
The front panel controls can be locked to protect from accidental power
supply parameter change. Press and hold the LIMIT button to toggle
between Locked front panel and Unlocked front panel. The display will
cycle between LFP and UFP. Releasing the LIMIT button while one of the
modes is displayed, selects that mode.
In Unlocked front panel mode, the front panel controls are enabled to
program and monitor the power supply parameters.
In Locked front panel mode, the VOLTAGE and CURRENT knobs, the
OCP/488 button, and the OUT ON button are disabled
The power supply will not respond to attempts to use these controls. The
display will show LFP to indicate that the front panel is locked. The
OVP/UVL button remains active to preview the OVP and UVL setting. The
LIMIT button also remains active to preview the output voltage and
current setting or to unlock the front panel.
NOTE
This function operates independently of the SCPI SYST:COMM:RLST command.
If the front panel has been locked from the front panel, it cannot be unlocked by
SYST:COMM:RLST. Conversely, if the front panel has been locked by
SYST:COMM:RLST, it cannot be unlocked from the front panel.
Series N5700 User’s Guide 41
Page 42
3 Operating the Power Supply Locally
and verifying that
Output On/Off state
UVL level
Output voltage setting
OCP setting
Output current setting
Locked/Unlocked front panel
OVP level
Start-up mode
Output On/Off Controls
OUT ON button
Safe-Start and Auto-Restart
The Output On/Off controls turn the power supply output on or off. This
can be done with the front panel OUT ON button or from the rear panel
J1 connector. With the output off, adjustments can be made to the power
supply or the load without shutting off AC power.
The OUT ON button can be pressed at any time to enable or disable the
power supply output. When the output is disabled, the output voltage and
current go to zero and the display shows OFF.
The power supply can be programmed to have either the last operating
settings (Auto-Restart) or the reset settings (Safe-Start) apply at turn-on.
Press and hold the OUT ON button to select between Safe-Start and AutoRestart modes. The display continuously cycles between SAF and AUT
every three seconds. Releasing the OUT ON button while one of the
modes is displayed, selects that mode.
In Safe-Start mode, the power supply turns on with the reset settings
(see chapter 5 under “*RST”). The output is disabled and the output
voltage and current are zero. This is the factory default.
CAUTION
After the “OFF” is first displayed, you need to allow a few seconds for the unit to
stabilize before you enable the output with the OUT ON button. The output
voltage and current settings may not be at zero during this stabilization time.
Check that the settings are stable by pressing the LIMIT button
the voltage and current settings indicate zero.
In Auto-Restart mode, the power supply restores the operating settings
that were saved when it was last turned off (see below). The output is
either enabled or disabled according to its last setting.
Output Shut-Off Terminals
Output Shut-Off (SO) terminals are available on the J1 connector to
enable or disable the power supply output. This function is edge-
triggered. J1 pin 15 is the Shut-Off input, and pins 2 and 3, which are
connected internally, are the signal common. All pins are optically
isolated from the power supply output. The Shut-Off input accepts a 2.5Vto-15V signal or an open/short contact to enable or disable the output.
The Shut-Off control logic is selected by SW1 setup switch 5.
42 Series N5700 User’s Guide
Page 43
Operating the Power Supply Locally 3
SW1 switch 5
SO Signal Level
Output
Display
Down (default)
2 - 15 V or Open
On
Voltage/Current
0 – 0.4V or Short
Off
SO
Up
2 - 15 V or Open
Off
SO 0 – 0.4V or Short
On
Voltage/Current
SW1 switch 9
ENA+/ENA– pins
Output
Display
Prot Indicator
Down (default)
Not active
On
Voltage/Current
Off
Up
Opened
Off
ENA
Blinking
Shorted
On
Voltage/Current
Off
When an on-to-off transition is detected at the Shut-Off input, the ShutOff function enables or disables the output according to the signal level
or the open/short applied to J1 pin 15. When the output has been
disabled by the Shut-Off function, the display shows SO to indicate the
output is disabled.
To re-enable the output after it has shut down, you must disable the ShutOff signal. In Auto-Restart mode, operation resumes automatically. In
Safe-Start mode the Shut-Off function is latched. You must also press the
OUT ON button or send an OUTPut:PROTection:CLEar command to
resume operation.
The Shut-Off function can be used to shut down multiple power supplies
in a daisy-chain fashion as explained later in this chapter. It can also be
used to reset the OVP and OCP as previously described.
NOTE
Because this function is edge-triggered, it may not be triggered by every state
change. For example, after applying AC power, the output will not be disabled
by the Shut Off function if the Shut-Off input is in the shut-off state. This is
because the unit has not detected an on-to-off signal transition.
Enable/Disable Terminals
CAUTION
To prevent possible damage to the unit, do not connect the Enable + or Enable –
terminals to the positive or negative output terminals.
Enable/Disable terminals are available on the J1 connector to enable or
disable the power supply output. This function is level-triggered. Simply
connect a switch or relay between J1 pins 1 and 14. This function is
activated by SW1 setup switch 9.
These pins disable the output when they are opened. When the output is
disabled, the PROT indicator on the front panel will blink.
To re-enable the output after it has shut down, you must short the Enable
+ and Enable – terminals. In Auto-Restart mode, operation resumes
automatically. In Safe-Start mode the Enable/Disable function is latched.
You must also press the OUT ON button or send an
OUTPut:PROTection:CLEar command to resume operation.
Series N5700 User’s Guide 43
Page 44
3 Operating the Power Supply Locally
Over-voltage protection
Enable/Disable signal true
Over-current protection
Shut Off signal true
Over-temperature protection
Remote interface failure
AC line failure
Output turned off
POWER SUPPLY
#
1
J1-2,3 J1-16 J1-16J1-16J1-15
Supply OK
POWER SUPPLY
#
2
J1-2,3 J1-15
POWER SUPPLY
#3
J1-2,3 J1-15
Shut OffCom
Shut OffSupply OKCom Com
Supply OK Shut Off
Power Supply OK Signal
Daisy-Chained Output Shut-down
The Power Supply OK signal on the J1 connector indicates a fault
condition in the power supply. J1 pin 16 is a TTL output signal. Pins 2
and 3, which are connected internally, are the signal common. All pins
are optically isolated from the power supply output. With no fault, Power
Supply OK is high, with a maximum source current of 2mA. When a fault
occurs, Power Supply OK is low, with a maximum sink current of 1mA.
The following faults set this signal low:
It is possible to configure a multiple power supply system to shut down
all the units when a fault condition occurs in one of the units. SW1 setup
switch 5 must be in the Down position to enable the daisy-chain
operation. Other switches are unaffected by this setting.
If a fault occurs in one unit, its Power Supply OK signal is set low and its
display will indicate the fault. The other units shut off with their displays
indicating SO. When the fault condition is cleared, all units will recover
according to their Safe-Start or Auto-Restart settings.
The following figure shows three units daisy-chained - the same
connection method can be used with additional units. The Shut Off and
Power Supply OK signals are referenced to Chassis Common (J1 pins 2
and 3).
Analog Programming of Output Voltage and Current
CAUTION
J1 pin 12, pin 22, and pin 23 are internally connected to the negative sense
terminal. Do not reference these pins to any terminal other than the negative
sense terminal, as it may damage the unit.
44 Series N5700 User’s Guide
In Local mode, the output voltage and current is programmed with the
front panel VOLTAGE and CURRENT knobs or over the remote interface.
In Analog mode, the output voltage and current can be programmed
either by an analog voltage or by resistors connected to the rear panel J1
connector.
Page 45
Operating the Power Supply Locally 3
function
signal
current control
Both Down (default)
No effect
Open
Local
Either one, or both Up
0 or Short
0~0.6V
Analog
1 or Open
Open
Local
using analog programming.
The J1 connector also provides monitoring signals for the output voltage
and output current. The programming range and monitoring signal range
can be selected using the SW1 setup switch.
NOTE
With analog programming enabled, you cannot program the output voltage or
current using the front panel knobs or the remote interface. However, you can
read back output voltage or current from the front panel or the remote interface.
Analog Programming Control Terminals
J1 connector pin 8 accepts a TTL signal or an open/short contact switch
(referenced to pin 12) to select between Local or Analog programming of
the output voltage and current. This function is enabled or disabled by
SW1 setup switches 1 and 2.
J1 connector pin 21 is an open collector output that indicates if the
power supply is in Local mode or in Analog mode. To use this output,
connect a pull-up resistor to a voltage source of 30 VDC maximum.
Choose the pull-up resistor so that the sink current will be less than 5mA
when the output is in low state.
SW1 switch 1 and 2
J1 pin 8
J1 pin 21
Output voltage/
Voltage Programming of Output Voltage and Current
CAUTION
To maintain the isolation of the power supply and prevent ground loops, use an
isolated programming source when operating the unit
Voltage programming sources of 0 - 5 V or 0 - 10 V can be used to
program the output voltage and current limit from zero to full scale.
Set the power supply to analog voltage programming as follows:
• Make sure that the power supply is turned off.
• Set SW1 setup switch 1 (for voltage) and 2 (for current) to the Up
position.
• Set SW1 setup switch 3 to select programming voltage range
according to the following table.
• Make sure that SW1 setup switches 7 and 8 are set Down.
• Connect a short between J1 pin 8 and J1 pin 12 (see figure).
• Connect the programming source to the mating plug of J1 as
shown in the following figure. Observe the correct polarity for the
voltage source.
Series N5700 User’s Guide 45
Page 46
3 Operating the Power Supply Locally
(J1 pin 9)
(J1 pin 10)
Down (default)
0 – 5 V
0 – 5 V
Up
0 – 10 V
0 – 10 V
1
14
13
25
10
12
8
9
23
22
+
+
CURRENT LIMIT
PROGRAMMING
OUTPUT VOLTAGE
PROGRAMMING
• Set the programming sources to the desired levels and turn the
power supply on. Adjust the programming sources to change the
power supply output.
The analog control circuits let you set the output voltage and current
limit up to 5% over the model-rated maximum value. The power supply
will operate within the extended range, however it is not recommended
to operate the power supply over its voltage and current rating, and
performance in this region is not guaranteed.
SW1 switch 3
Voltage Programming
Current Programming
Resistance Programming of Output Voltage and Current
46 Series N5700 User’s Guide
Resistances of 0 - 5 kΩ or 0 - 10 kΩ can be selected to program the output
voltage and current limit from zero to full scale. Internal current sources
supply a 1mA current through the external resistors. The voltage drop
across the resistors is used as the programming voltage for the power
supply. To maintain the temperature stability specification of the power
supply, only use resistors that are stable and low noise, with a
temperature coefficient less than 50ppm.
Set the power supply to resistance programming as follows:
• Make sure that the power supply is turned off.
• Set SW1 setup switch 1 (for voltage) and 2 (for current) to the UP
position.
• Set SW1 setup switch 3 to select programming resistance range
according to the following table.
• Set SW1 setup switch 7 (for voltage) and 8 (for current) to the Up
position to enable resistance programming.
• Connect a short between J1 pin 8 and J1 pin 12 (see figure).
• Connect the programming resistors to the mating plug of J1 as
shown in the following figure. A variable resistor can control the
output over its entire range, or a combination of variable resistor
and series/parallel resistors can control the output over a
restricted portion of its range.
Page 47
Operating the Power Supply Locally 3
1
14
13
25
10 9
23
22
CURRENT LIMIT
PROGRAMMING
OUTPUT VOLTAGE
PROGRAMMING
PROGRAMMING
RESISTOR
PROGRAMMING
RESISTOR
OPTIONAL SETS
LOWER LIMIT
OPTIONAL SETS
LOWER LIMIT
OPTIONAL SETS
UPPER LIMIT
OPTIONAL SETS
UPPER LIMIT
12
8
• Set the programming resistors to the desired resistance and turn
the power supply on. Adjust the resistors to change the power
supply output.
The analog control circuits let you set the output voltage and current
limit up to 5% over the model-rated maximum value. The power supply
will operate within the extended range, however it is not recommended
to operate the power supply over its voltage and current rating, and
performance in this region is not guaranteed.
SW1 switch 3 Voltage Programming
(J1 pin 9)
Current programming
(J1 pin 10)
Down (default) 0 – 5 kΩ 0 – 5 kΩ
Up 0 – 10 kΩ 0 – 10 kΩ
External Monitoring of Output Voltage and Current
The J1 connector also provides analog signals for monitoring the output
voltage and current. Selection of the voltage range between 0 – 5 V or 0 –
10 V is made by SW1 setup switch 4. The monitoring signals represent 0
to 100% of the power supply output voltage and current rating. The
monitor outputs have a 500 Ω series output resistance. Make sure that
the sensing circuit has an input resistance greater than 500 kΩ or the
accuracy will be reduced.
SW1 switch 4 Voltage
range
Down (default) 0 – 5 V J1 pin 11 Voltage Monitor
J1 pin 24 Current Monitor
Up 0 – 10 V J1 pin 11 Voltage Monitor
J1 pin 24 Current Monitor
J1 pin 12 is the signal common for J1 pins 11 and 24.
Series N5700 User’s Guide 47
J1 signal
connection
Signal function
Page 48
Page 49
4
Operating the Power Supply Remotely
Connecting to the Interfaces .......................................................................... 50
SCPI Commands – an Introduction ................................................................ 59
This chapter contains information on how to configure the three
remote interfaces that are provided on the back of the instrument. In
most cases you can connect your power supply to any one of these
interfaces and be up and running with a minimum amount of
configuration.
NOTE
Detailed information on configuring the remote interfaces is included in the
USB/LAN/GPIB Interfaces Connectivity Guide document located on the
Automation-Ready CD-ROM included with this product.
This chapter also contains a brief introduction to the SCPI
Programming language. SCPI (Standard Commands for
Programmable Instruments) is a programming language for
controlling instrument functions over the GPIB. SCPI is layered on
top of the hardware-portion of IEEE 488.2. The same SCPI commands
and parameters control the same functions in different classes of
instruments.
Series N5700 User’s Guide 49
Page 50
4 Operating the Power Supply Remotely
Connecting to the Interfaces
The Keysight N5700 power supplies support remote interface
communication using a choice of three interfaces: GPIB, USB, and
LAN. All three interfaces are live at power-on.
GPIB Interface
NOTE
For detailed information about GPIB interface connections, refer to the Keysight
Technologies USB/LAN/GPIB Interfaces Connectivity Guide, located on the
Automation-Ready CD-ROM that is shipped with your product.
The following steps will help you quickly get started connecting your
instrument to the General Purpose Interface Bus (GPIB). The
following figure illustrates a typical GPIB interface system.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with
your product.
2 If you do not have a GPIB interface card installed on your
computer, turn off your computer and install the GPIB card.
3 Connect your instrument to the GPIB interface card using a GPIB
interface cable.
50 Series N5700 User’s Guide
4 Use the Connection Expert utility of the Keysight IO Libraries
Suite to configure the installed GPIB interface card’s parameters.
5 The power supply is shipped with its GPIB address set to 5. Use
the front panel menu if you need to change the GPIB address.
a Press and hold the OCP/488 button for about three seconds.
The DC VOLTS display will show the present GPIB address.
b To change the GPIB address, turn the voltage knob until the
desired GPIB address appears in the display. Valid GPIB
addresses are in the range of 0 to 30.
6 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments.
Page 51
USB Interface
Operating the Power Supply Remotely 4
NOTE
For detailed information about USB interface connections, refer to the Keysight
Technologies USB/LAN/GPIB Interfaces Connectivity Guide, located on the
Automation-Ready CD-ROM that is shipped with your product.
The following steps will help you quickly get started connecting your
USB-enabled instrument to the Universal Serial Bus (USB). The
following figure illustrates a typical USB interface system.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with
your product.
2 Connect your instrument to the USB port on your computer.
3 With the Connection Expert utility of the Keysight IO Libraries
Suite running, the computer will automatically recognize the
instrument. This may take several seconds. When the instrument
is recognized, your computer will display the VISA alias, IDN
string, and VISA address. This information is located in the USB
folder.
NOTE
The VISA address is: USB0::2391::2055::serialnumber::0:INSTR
where 2391 is the Keysight code, 2055 is the N5700 code, and serialnumber is
the 10-character serial number located on the label on the side of the unit.
4 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments.
LAN Interface
NOTE
Series N5700 User’s Guide 51
For detailed information about LAN interface connections, refer to the Keysight
Technologies USB/LAN/GPIB Interfaces Connectivity Guide, located on the
Automation-Ready CD-ROM that is shipped with your product.
The following steps will help you quickly get started connecting and
configuring your instrument on a local area network (LAN). The two
types of local area networks connections that are discussed in this
section are site networks and private networks.
Page 52
4 Operating the Power Supply Remotely
H1234 is
Connecting to a Site LAN
A site LAN is a local area network in which LAN-enabled instruments
and computers are connected to the network through routers, hubs,
and/or switches. They are typically large, centrally-managed
networks with services such as DHCP and DNS servers.
1 If you have not already done so, install the Keysight IO Libraries
2 Connect the instrument to the site LAN. Provided that your
Suite from the Automation-Ready CD-ROM that is shipped with
your product.
network has a DHCP server and uses Dynamic DNS naming
service, the instrument will automatically obtain an IP address
from the network. This may take up to one minute. It will also
register its hostname with the dynamic DNS server. The default
hostname can then be used to communicate with the instrument.
The front panel LAN indicator will come on when the LAN port
has been configured. If you are unable to communicate with the
instrument, check that a valid IP address has been assigned.
Press the front panel LAN button to view the IP address.
NOTE
NOTE
Each Keysight N5700 power supply is shipped with a default hostname with the
format: A-modelnumber-serialnumber where modelnumber is the instrument’s
6-character model number (e.g. N5741A), and serialnumber is 5th through the
9th character of the 10-character serial number located on the label on the side
of the unit (e.g. H1234 if the serial number is US24H12345). A-N5741Aan example of a hostname.
3 Use the Connection Expert utility of the Keysight IO Libraries
Suite to add the N5700 power supply and verify a connection. To
add the instrument, you can request the Connection Expert to
discover the instrument. If the instrument cannot be found, you
can add the instrument using the instrument’s hostname.
If this does not work, refer to the chapter on “Troubleshooting Guidelines” in
the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide.
4 You can now use Interactive IO within the Connection Expert to
communicate with your instrument, or you can program your
instrument using the various programming environments. You
can also use the Web browser on your computer to communicate
with the instrument as described under “Using the Web Server”
later in this chapter.
52 Series N5700 User’s Guide
Page 53
Operating the Power Supply Remotely 4
it may still retain previous network settings from the site LAN. Wait one minute after
Connecting to a Private LAN:
A private LAN is a network in which LAN-enabled instruments and
computers are directly connected, and not connected to a site LAN.
They are typically small, with no centrally-managed resources.
1 If you have not already done so, install the Keysight IO Libraries
Suite from the Automation-Ready CD-ROM that is shipped with
your product.
2 Connect the instrument to the computer using a LAN crossover
cable. Alternatively, connect the computer and the instrument to
a standalone hub or switch using regular LAN cables.
NOTE
Make sure your computer is configured to obtain its address from DHCP and that
NetBIOS over TCP/IP is enabled. If the computer had been connected to a site LAN,
disconnecting it from the site LAN before connecting it to the private LAN. This
allows Windows to sense that it is on a different network and restart the network
configuration. If you are running Windows 98, you may need to manually release the
previous settings.
3 The factory-shipped instrument LAN settings are configured to
automatically obtain an IP address from the network using a
DHCP server, or using AutoIP if a DHCP server is not present.
You can leave these settings as they are. Most Keysight products
and most computers will automatically choose an IP address
using auto-IP if a DHCP server is not present. Each assigns itself
an IP address from the block 169.254.nnn. Note that this may
take up to one minute.
The front panel LAN indicator will come on when the LAN port
has been configured. If you are unable to communicate with the
instrument, check that a valid IP address has been assigned.
Press the front panel LAN button to view the IP address.
4 Use the Connection Expert utility of the Keysight IO Libraries
Suite to add the N5700 power supply and verify a connection. To
add the instrument, you can request the Connection Expert to
discover the instrument. If the instrument cannot be found, you
can add the instrument using the instrument’s hostname. The
default hostname is described under “Connecting to a Site LAN”.
NOTE
Series N5700 User’s Guide 53
If this does not work, refer to the chapter on “Troubleshooting Guidelines” in the
Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide.
Page 54
4 Operating the Power Supply Remotely
5 You can now use Interactive IO within the Connection Expert to
LAN Communication
The Keysight IO Libraries Suite along with instrument drivers for
specific programming environments can be used to communicate
with your power supply. Your can also communicate with your power
supply using its built-in Web server, the Telnet utility, or sockets.
These latter methods are a convenient way to communicate with the
power supply without using I/O libraries or drivers.
Ethernet Connection Monitoring
Keysight N5700 power supplies that have the LXI label on the front
panel provide Ethernet connection monitoring. With Ethernet
connection monitoring, the instrument’s LAN port is continually
monitored, and automatically reconfigured when the instrument is
unplugged for a minimum of 20 seconds and then reconnected to a
network. The front panel LAN indicator will come on when the LAN
port is connected and configured.
communicate with your instrument, or you can program your
instrument using the various programming environments. You
can also use the Web browser on your computer to communicate
with the instrument as described under “Using the Web Server”.
NOTE
Using the Web Server
Your power supply has a built-in Web server that lets you control it
directly from an internet browser on your computer. With the Web
server, you can control and configure all of the front panel functions
as well as additional functions such as triggering and the LAN
parameters, which are not available from the front panel.
The built-in Web server only operates over the LAN interface. It requires Internet
Explorer 7+. You also need the Java Plug-in version 7+. This is included in the
Java Runtime Environment.
The Web server is enabled when shipped. To launch the Web server:
1 Open the internet browser on your computer.
2 In the Tools menu, under Internet Options, select Connections,
then LAN Settings, and make sure that the Bypass proxy server
for local addresses box is checked.
3 Enter the instrument’s hostname into the browser’s Address field
to launch the Web server. The following home page will appear.
4 Click on the Browser Web Control button in the navigation bar
on the left to begin controlling your instrument.
5 For additional help about any of the pages, click on the Help with
this Page button.
54 Series N5700 User’s Guide
If desired, you can control access to the Web server using password
protection. As shipped from the factory, no password is set. To set a
password, refer to the section “Configuring the LAN Parameters”.
Page 55
Using Telnet
Operating the Power Supply Remotely 4
In an MS-DOS Command Prompt box type: telnet hostname 5024
where hostname is the N5700 hostname or IP address, and 5024 is
the instrument’s telnet port.
You should get a Telnet session box with a title indicating that you
are connected to the power supply. Type the SCPI commands at the
prompt.
Using Sockets
Keysight instruments have standardized on using port 5025 for SCPI
socket services. A data socket on this port can be used to send and
receive ASCII/SCPI commands, queries, and query responses. All
commands must be terminated with a newline for the message to be
parsed. All query responses will also be terminated with a newline.
The power supply allows any combination of up to three
simultaneous data socket and telnet connections to be made.
The socket programming interface also allows a control socket
connection. The control socket can be used by a client to send device
clear and to receive service requests. Unlike the data socket, which
uses a fixed port number, the port number for a control socket varies
and must be obtained by sending the following SCPI query to the data
socket: SYSTem:COMMunicate:TCPip:CONTrol?
After the control port number is obtained, a control socket
connection can be opened. As with the data socket, all commands to
the control socket must be terminated with a newline. All query
responses will also be terminated with a newline.
Series N5700 User’s Guide 55
To send a device clear, send the string “DCL” to the control socket.
When the power supply has finished performing the device clear it
echoes the string “DCL” back to the control socket.
Page 56
4 Operating the Power Supply Remotely
IP and TCP/IP communications with the instrument.
Service requests are enabled for control sockets using the Service
Request Enable register. Once service requests have been enabled,
the client program listens on the control connection. When SRQ goes
true the instrument will send the string “SRQ +nn” to the client. The
“nn” is the status byte value, which the client can use to determine
the source of the service request.
Configuring the LAN Parameters
To configure the LAN parameters from the instrument’s Web server,
launch the Web server as previously described, and click on the View
& Modify Configuration tab on the left side of the page. Then click on
the Modify Configuration button on the top of the page. The following
screen lets you modify the LAN parameters:
IP Address
Configuration
IP Address
56 Series N5700 User’s Guide
The configurable LAN parameters are described as follows:
This setting indicates how the instrument will determine its IP Address,
Subnet Mask, and Default Gateway.
If Automatic is selected, the instrument tries to obtain an IP address from a
DHCP server. If a DHCP server is found, the DHCP server assigns an IP
address, Subnet Mask and Default Gateway to the instrument. If no DHCP
server is found, the instrument automatically configures its IP address and
Subnet Mask using Dynamically Configured Link Local Addressing (Auto-IP),
which results in an address in the range 169.254.xxx.yyy.
If Manual is selected, the instrument uses the IP Address, Subnet Mask, and
Default Gateway defined below..
This value is the instrument’s Internet Protocol (IP) address. An IP Address is
four decimal numbers from 0 to 255 separated by periods. It is required for all
Page 57
Operating the Power Supply Remotely 4
DNS Server
default description is restored. Maximum length is 39 characters.
Enabled
the Desired Hostname and Description fields.
front panel. Maximum length is 12 characters.
Subnet Mask This value enables the instrument to determine whether a client IP address is
on the same local subnet. When a client IP address is on a different subnet,
all packets must be sent to the Default Gateway. A value of 0.0.0.0 or
255.255.255.255 disables subnetting.
Default
Gateway
DNS Server
Address
Configuration
Preferred
DNS Server
Alternate
Desired
Hostname
This value is the IP Address of the default gateway that allows the instrument
to communicate with systems that are not on the local subnet. This is the
default subnet gateway, where packets are sent that are destined for a device
not on the local subnet, as determined by the subnet mask setting. A value of
0.0.0.0 disables subnetting.
This setting indicates how the instrument will determine its DNS server, either
manually or automatically from a DHCP server.
If Automatic is selected, the instrument tries to obtain a DNS server address
form a DHCOP server.
If Manual is selected, the instrument uses the DNS servers defined below.
This is the address of the Domain Name System (DNS) server. DNS is an
internet service that translates domain names into IP addresses. The
instrument uses this server to determine and display its hostname.
This is the address of the alternate Domain Name System (DNS) server.
If Dynamic DNS is available on your network and your instrument uses DHCP,
the Hostname is registered with the Dynamic DNS service at power-on. If the
field is blank, the factory default hostname is restored. A hostname must start
with a letter and may contain upper and lower case letters, numbers and
dashes(-). The Maximum length is 15 characters. The default format is A<modelnumber>-<digits 5 through 9 of serialnumber>.
Description
This field contains the desired mDNS service name for the instrument, which
makes it easy to identify the device on the network. This description is also
shown on the instrument’s Welcome page. If the field is blank, the factory
mDNS
This enables or disables mDNS service announcements. mDNS is affected bvy
Password If a password has been set, you will be prompted for it before going to the
Modify Configuration and Browser Web Control pages. The password may
contain letters, numbers, or underscores (_). Once set, the password may be
disabled by entering the old password, and leaving the new password fields
empty. The password is also cleared by a LAN Reset from the instrument's
NOTE
The configuration parameters on pre-Windows CE instruments (instruments
manufactured before mid-2014) are slightly different than those described above.
For a description of these previous parameters, access the Modify Configuration
dialog; then click on the Help with this Page button.
Series N5700 User’s Guide 57
Page 58
4 Operating the Power Supply Remotely
Factory-shipped non-volatile LAN settings
Get IP Address
Automatic
Alternate DNS server
Blank
IP Address
169.254.57.0
Desired Hostname
A-N57xxA-xxxxx
Subnet Mask
255.255.0.0
Description
Keysight N57xxA (serial#)
Default Gateway
0.0.0.0
mDNS Enabled
Enabled
DNS Server Address Configuration
Automatic
Password
Blank
Preferred DNS server
Blank
Factory-shipped LAN Settings
The factory-shipped LAN settings documented in the following table
are optimized for connecting your power supply to a site network.
They should also work well for other network configurations.
The factory-shipped settings can be restored by pressing and holding
the front panel LAN button for three seconds. Pressing the LAN
button again while the message “LAn rES” is displayed resets the
LAN settings.
58 Series N5700 User’s Guide
Page 59
SCPI Commands – an Introduction
[SOURce:]
CURRent
[:LEVel]
[:IMMediate] <NRf+>
:TRIGgered <NRf+>
:PROTection
:STATe <Bool>
means that SOURce: may be omitted.
indicates a specific form of numerical data.
Vertical bars separate alternative parameters. For example, VOLT | CURR indicates
that either "VOLT" or "CURR" can be used as a parameter.
SCPI (Standard Commands for Programmable Instruments) is an
ASCII-based instrument command language designed for test and
measurement instruments. SCPI commands are based on a
hierarchical structure, also known as a tree system. In this system,
associated commands are grouped together under a common node or
root, thus forming subsystems. Subsystem commands perform
specific power supply functions. A portion of the SOURce subsystem
is shown below to illustrate the tree system.
SOURce is the root keyword of the command, CURRent is a secondlevel keyword, LEVel and PROTection are third-level keywords, and
IMMediate, TRIGgered and STATe are fourth-level keywords. Colons
(:) separate higher-level from lower-level keywords.
Operating the Power Supply Remotely 4
Syntax
The following command syntax is used in this manual:
Square Brackets [ ]
Items within square brackets are optional. The representation [SOURce:]VOLTage
Angle brackets < > Items within angle brackets are parameter descriptions. For example, <NR1>
Vertical bar |
The syntax characters cannot be included in the command string.
Multiple Commands in a Message
Multiple SCPI commands can be combined and sent as a single
message with one message terminator. There are two important
considerations when sending several commands within a single
message:
Use a semicolon (;) to separate commands within a message.
There is an implied path that affects how commands are
interpreted by the power supply.
The command path can be thought of as a string that gets inserted
before each keyword within a message. For the first command in a
message, the path is a null string. For each subsequent command the
path is defined as the characters that make up the keywords of the
Series N5700 User’s Guide 59
Page 60
4 Operating the Power Supply Remotely
previous command in the message up to and including the last colon
separator. An example of a message with two commands is:
OUTPut:STATe ON;PROTection:CLEar
which shows the use of the semicolon separating the two commands,
and also illustrates the command path concept. Note that with the
second command, the leading keyword OUTPut was omitted because
after the OUTPut:STATe ON command, the path became defined as
OUTPut, and thus the second command was interpreted as:
OUTPut:PROTection:CLEar
In fact, it would have been incorrect to include the OUTPut keyword
in the second command, because the result after combining it with
the command path would be:
OUTPut:OUTPut:PROTection:CLEar
which would result in a syntax error.
Commands from Different Subsystems
In order to combine commands from different subsystems, you need
to be able to reset the command path to a null string within a
message. Beginning the command with a colon (:), discards the
previous path. For example, you could clear the output protection
and check the status of the Operation Condition register in one
message by using a root specifier as follows:
Message Unit
OUTPut:PROTection:CLEar;:STATus:OPERation:CONDition?
The following message shows how to combine commands from
different subsystems as well as within the same subsystem.
VOLTage:LEVel 7.5;PROTection 10;:CURRent:LEVel 0.25
Note the use of the optional keyword LEVel to maintain the correct
path within the subsystems, and the use of the root specifier (:) to
move between subsystems.
The simplest SCPI command is a single message unit consisting of a
keyword followed by a message terminator such as newline. The
message unit may include a parameter after the keyword. The
parameter can be numeric or a string.
ABORt<NL>
VOLTage 20<NL>
VOLTage:TRIGgered MINimum<NL>
Colons (:) separate higher-level keywords from lower-level keywords.
Use a blank space to separate parameters from keywords. If a
command requires more than one parameter, use commas to
separate adjacent parameters.
60 Series N5700 User’s Guide
Page 61
Queries
Operating the Power Supply Remotely 4
In the previous examples, the upper-case letters indicate the
abbreviated spelling for the keyword. For shorter program lines, you
can send the abbreviated form. For better program readability, you
can send the long form. For example, VOLT and VOLTage are both
acceptable forms. You can use upper- or lower-case letters. Therefore,
VOLTAGE, Volt, and volt are all acceptable. Other forms, such as VOL
and VOLTAG, generate an error.
You can query the current value of most commands by adding a
question mark to the command (VOLTage?, VOLTage:TRIGgered?). If
a query contains a parameter, place the query indicator at the end of
the last keyword. Observe the following precautions with queries:
Add a blank space between the query indicator (?) and any
subsequent parameter. (VOLTage:TRIGgered? MAX)
Set up the proper number of variables for the returned data.
Read back all the results of a query before sending another
command to the power supply. Otherwise a Query Interrupted
error will occur and the unreturned data will be lost.
Common Commands
Common commands generally control overall power supply
functions, such as reset, status, and synchronization. All common
commands consist of a three-letter mnemonic preceded by an
asterisk: *RST *IDN? *SRE 8
You can combine common commands with subsystem commands in
the same message. Use semicolons to separate the common command
from the subsystem commands. Common commands do not affect the
command path; you may insert them anywhere in the message.
VOLTage:TRIGgered 10;:INITiate;*TRG
OUTPut OFF;*RCL 2;OUTPut ON
Command Terminators
A terminator informs SCPI that it has reached the end of a command.
Three permitted command terminators are:
newline (<NL>), which is ASCII decimal 10 or hex 0A.
end or identify (<END>)
both of the above (<NL><END>).
In the examples of this guide, the message terminator is assumed.
Series N5700 User’s Guide 61
Page 62
4 Operating the Power Supply Remotely
Symbol
Response Formats
least-significant digit. Examples: 273
Common Multipliers
Symbol
Response Formats
the short form of the parameter is returned.
Parameter Types
Data programmed or queried from the power supply is ASCII. The
data may be numerical or character string.
Numeric Parameters
<NR1> Digits with an implied decimal point assumed at the right of the
<NR2> Digits with an explicit decimal point. Example: 27.3
<NR3> Digits with an explicit decimal point and an exponent. Example:
2.73E+02
Parameter Formats
<NRf> Extended format that includes <NR1>, <NR2> and <NR3>.
Examples: 273 27.3 2.73E+02
<NRf+> Expanded decimal format that includes <NRf> and MIN, MAX.
Examples: 273 27.3 2.73E+02 MAX.
MIN and MAX are the minimum and maximum limit values that
are implicit in the range specification for the parameter.
<Bool> Boolean Data. Can be numeric (0, 1), or named (OFF, ON).
<SPD> String program data. String parameters enclosed in single or
double quotes.
Suffixes and Multipliers
Class Suffix Unit Unit with Multiplier
Current A ampere MA (milliampere)
Amplitude V volt MV (millivolt)
Time S second MS (millisecond)
1E3 K kilo
1E-3 M milli
1E-6 U micro
Response Data Types
<CRD> Character Response Data. Returns discrete parameters. Only
<AARD> Arbitrary ASCII Response Data. Permits the return of
undelimited 7-bit ASCII. This data type has an implied message
terminator.
<SRD> String Response Data. Returns string parameters enclosed in
double quotes.
62 Series N5700 User’s Guide
Page 63
SCPI Command Completion
OUTPut:STATe
INITiate
VOLTage
OUTPut:PROTection:CLEar
CURRent
*WAI
OUTPut ON;*WAI;:MEASure:VOLTage?
complete before proceeding with its program.
*OPC
interrupt basis, *OPC allows subsequent commands to be executed.
SCPI commands sent to the power supply are processed either
sequentially or in parallel. Sequential commands finish execution
before a subsequent command begins. Parallel commands allow other
commands to begin executing while the parallel command is still
executing.
The following is a list of parallel commands. You should use some
form of command synchronization as discussed in this section before
assuming that these commands have completed.
The *WAI, *OPC, and *OPC? common commands provide different
ways of indicating when all transmitted commands, including any
parallel ones, have completed their operations. Some practical
considerations for using these commands are as follows:
This command prevents the power supply from processing subsequent
commands until all pending operations are completed. For example,
the *WAI command can be used to make a voltage measurement after
an output on command has completed:
Operating the Power Supply Remotely 4
*OPC?
NOTE
This command places a 1 in the Output Queue when all pending
operations have completed. Because it requires your program to read
the returned value before executing the next program statement,
*OPC? can be used to cause the controller to wait for commands to
This command sets the OPC status bit when all pending operations
have completed. Since your program can read this status bit on an
The trigger subsystem must be in the Idle state for the status OPC bit to be
true. As far as triggers are concerned, OPC is false whenever the trigger
subsystem is in the Initiated state.
Device Clear
You can send a Device Clear at any time to abort a SCPI command
that may be hanging up the GPIB interface. Device Clear clears the
input and output buffers of the power supply. The status registers,
error queue, and all configuration states are left unchanged by Device
Clear. Device Clear also prepares the power supply to accept a new
command string. The following statement shows how to send a device
clear over the GPIB interface using Keysight BASIC:
CLEAR 705 IEEE-488 Device Clear
Series N5700 User’s Guide 63
Page 64
Page 65
5
Language Reference
SCPI Command Summary ................................................................................ 66
Calibration Commands ..................................................................................... 68
Measure Commands......................................................................................... 69
Output Commands ............................................................................................ 70
Source Commands ............................................................................................ 71
Status Commands ............................................................................................. 73
System Commands ........................................................................................... 79
Trigger Commands ............................................................................................ 81
This section gives the syntax and parameters for all the IEEE 488.2
SCPI Subsystem commands and Common commands used by the
power supply. It is assumed that you are familiar with the material in
chapter 4, which explains the terms, symbols, and syntactical
structures used here and gives an introduction to programming. You
should also be familiar with chapter 3, in order to understand how
the power supply functions.
Subsystem commands are specific to functions. They can be a single
command or a group of commands. The groups are comprised of
commands that extend one or more levels below the root. The
subsystem commands are arranged alphabetically according to the
function they perform.
Common commands begin with an * and consist of three letters
(command) or three letters and a ? (query). They are defined by the
IEEE 488.2 standard to perform common interface functions.
Common commands are grouped along with the subsystem
commands according to the function they perform.
Series N5700 User’s Guide 65
Page 66
5 Language Reference
SCPI Command
Description
ABORt
Aborts the triggered action
CALibrate
:CURRent[:LEVel]
Calibrates the output current programming
:DATA <NRf>
Enters the calibration value
:DATE <”SPD”>
Sets the calibration date
:LEVel P1 | P2
Advances to the next calibration step
:PASSword <NRf>
Sets the numeric calibration password
:STATE <Bool> [,<NRf>]
Enables/disables calibration mode
:VOLTage[:LEVel]
Calibrates the output voltage programming
INITiate
[:IMMediate][:TRANsient]
Initiates the trigger system
:CONTinuous[:TRANsient]
Enables/disables continuous triggers
MEASure
[:SCALar]
:CURRent[:DC]?
Returns the measured output current
:VOLTage[:DC]?
Returns the measured output voltage
OUTPut
[:STATe] <Bool>
Enables/disables the specified output
:PON
:STATe RST | AUTO
Programs the Power-On State
:PROTection
:CLEar
Resets latched protection
[SOURce:]
CURRent
[:LEVel]
[:IMMediate][:AMPLitude] <NRf+>
Sets the output current
:TRIGgered[:AMPLitude] <NRf+>
Sets the triggered output current
:PROTection
:STATe <Bool>
Enables/disables over-current protection
VOLTage
[:LEVel]
[:IMMediate][:AMPLitude] <NRf+>
Sets the output voltage
:TRIGgered[:AMPLitude] <NRf+>
Sets the triggered output voltage
:LIMit
:LOW <NRf+>
Sets the low-voltage limit
:PROTection
[:LEVel] <NRf+>
Sets the over-voltage protection level
SCPI Command Summary
NOTE
Some [optional] commands have been included for clarity. All settings commands
have a corresponding query.
Subsystem Commands
66 Series N5700 User’s Guide
Page 67
SCPI Command Description
STATus
:OPERation
[:EVENt]?
Returns the value of the operation event register
:CONDition?
Returns the value of the operation condition register
:ENABle <NRf>
Enables specific bits in the Event register
:NTRansition<NRf>
Sets the Negative transition filter
:PTRansition<NRf>
Sets the Positive transition filter
:PRESet
Presets all enable and transition registers to power-on
:QUEStionable
[:EVENt]?
Returns the value of the questionable event register
:CONDition?
Returns the value of the questionable condition register
:ENABle <NRf>
Enables specific bits in the Event register
:NTRansition<NRf>
Sets the Negative transition filter
:PTRansition<NRf>
Sets the Positive transition filter
SYSTem
:COMMunicate
:RLSTate LOCal | REMote | RWLock
Specifies the Remote/Local state of the instrument
:ERRor?
Returns the error number and error string
:VERSion?
Returns the SCPI version number
TRIGger
:SOURce BUS
Sets the measurement trigger source
[:TRANsient][:IMMediate]
Generates a transient trigger
Command
Description
*CLS
Clear status
*ESE <NRf>
Standard event status enable
*ESE?
Return standard event status enable
*ESR?
Return event status register
*IDN?
Return instrument identification
*OPC
Enable "operation complete" bit in ESR
*OPC?
Return a "1" when operation complete
*OPT?
Return option number
*RCL <NRf>
Recalls a saved instrument state
*RST
Reset
*SAV <NRf>
Saves an instrument state
*SRE <NRf>
Set service request enable register
*SRE?
Return service request enable register
*STB?
Return status byte
*TRG
Trigger
*TST
Always returns a “0”
*WAI
Holds off bus until all device commands done
Language Reference 5
Common Commands
Series N5700 User’s Guide 67
Page 68
5 Language Reference
Calibration Commands
Calibration commands let you enable and disable the calibration
mode, change the calibration password, calibrate current and voltage
programming, and store new calibration constants in nonvolatile
memory.
NOTE
If calibration mode has not been enabled with CALibrate:STATe, the calibration
commands will generate an error.
CALibrate:CURRent[:LEVel]
This command initiates the calibration of the output current.
CALibrate:DATA <value>
This command enters a calibration value that you obtain by reading
an external meter. You must first select a calibration level (with
CALibrate:LEVel) for the value being entered. Data values are
entered in either volts or amperes, depending on which function is
being calibrated.
CALibrate:DATE <“date”>
CALibrate:DATE?
This command stores the date the unit was last calibrated. The data
must be of the numeric format “yyyy/mm/dd” where yyyy indicates
the year, mm indicates the month, and dd indicates the day. The
query returns the date.
CALibrate:LEVel P1|P2
This command selects the next point in the calibration sequence.
P1 is the first calibration point,
P2 is the second calibration point.
CALibrate:PASSword <password>
This command lets you change the calibration password. A new
password is automatically stored in nonvolatile memory. If the
password is set to 0, password protection is removed and the ability
to enter calibration mode is unrestricted. The default password is 0
(zero).
68 Series N5700 User’s Guide
Page 69
CALibrate:STATe ON|OFF [,<password>]
CALibrate:STATe?
This command enables/disables calibration mode. Calibration mode
must be enabled for the power supply to accept any other calibration
commands. The first parameter specifies the enabled or disabled
state On (1) or Off (0). The second parameter is the password.
A password is required if calibration mode is being enabled and the
existing password is not 0. If the password is not entered or is
incorrect, an error is generated and the calibration mode remains
disabled. The query returns only the state, not the password.
The *RST value = Off.
CALibrate:VOLTage[:LEVel]
This command initiates the calibration of the output voltage.
Language Reference 5
Measure Commands
MEASure[:SCALar]:CURRent[:DC]?
MEASure[:SCALar]:VOLTage[:DC]?
Measure commands measure the output voltage or current. MEASure
commands acquire new data before returning the reading.
Measurement overflows return a reading of 9.91E+37.
These queries perform a measurement and return the DC output
current in amperes or DC output voltage in volts.
Series N5700 User’s Guide 69
Page 70
5 Language Reference
Output Commands
OUTPut[:STATe] ON|OFF
OUTPut[:STATe]?
OUTPut:PON:STATe RST|AUTO
OUTPut:PON:STATe?
Output commands enable the output, power-on, and protection
functions.
This command enables or disables the specified output(s). The
enabled state is On (1); the disabled state is Off (0). The state of a
disabled output is a condition of zero output voltage and a zero
source current (see *RST). The query returns 0 if the output is off,
and 1 if the output is on. The *RST value = Off.
This command determines if the power-on state will be determined
by the reset state, or the settings the unit had when it was turned off.
RST programs the unit to the reset state; AUTO programs the unit to
the settings it had when it was turned off. The power-on state
information is saved on non-volatile memory.
Refer to *RST and *RCL under System Commands for details.
OUTPut:PROTection:CLEar
This command clears the latched signals that have disabled the
output. The over-voltage and over-current conditions are always
latching. The over-temperature condition, AC-fail condition, Enable
pins, and SO pins are latching if OUTPut:PON:STATe is RST, and nonlatching if OUTPut:PON:STATe is AUTO.
All conditions that generate the fault must be removed before the
latch can be cleared. The output is then restored to the state it was in
before the fault condition occurred.
70 Series N5700 User’s Guide
Page 71
Language Reference 5
Model (V rating)
6V
8V
12.5V
20V
30V
40V
60V
80V
100V
150V
300V
600V
Min. voltage level
0 0 0 0 0 0 0 0 0 0 0 0 Max. voltage level
6.3
8.4
13.125
21
31.5
41.9
62.85
83.8
104.76
157.1
314.2
628.5
Source Commands
Source commands program the voltage, current, triggered, and
protection functions.
[SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude] <value>|MIN|MAX
[SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude]? [MIN|MAX]
[SOURce:]CURRent[:LEVel]:TRIGgered[:AMPLitude] <value>|MIN|MAX
[SOURce:]CURRent[:LEVel]:TRIGgered[:AMPLitude]? [MIN|MAX]
These commands set the immediate and the triggered output current
level. The values are programmed in amperes. The immediate level is
the output current setting. The triggered level is a stored value that is
transferred to the output when a trigger occurs. At *RST, the
immediate and triggered current values = 0.
[SOURce:]CURRent:PROTection:STATe ON|OFF
[SOURce:]CURRent:PROTection:STATe?
This command enables or disables the over-current protection (OCP)
function. The enabled state is On (1); the disabled state is Off (0). If
the over-current protection function is enabled and the output goes
into constant current operation, the output is disabled and OC is set
in the Questionable Condition status register. The *RST value = Off.
An over-current condition can be cleared with the Output Protection
Clear command after the cause of the condition is removed.
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <value>|MIN|MAX
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude]? [MIN|MAX]
[SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPLitude] <value>|MIN|MAX
[SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPLitude]? [MIN|MAX]
These commands set the immediate and the triggered output voltage
level. The values are programmed in volts. The immediate level is the
output voltage setting. The triggered level is a stored value that is
transferred to the output when a trigger occurs. At *RST, the
immediate and triggered voltage values = 0.
The range of values that can be programmed for these commands is
coupled with the voltage protection and the voltage limit low settings.
The maximum value for the immediate and triggered voltage level is
either the value in the following table, or the voltage protection
setting divided by 1.05; whichever is lower. The minimum value is
either the value in the table, or the low voltage setting divided by
0.95; whichever is higher.
Note that triggered values can be programmed outside these limits,
but an error will be generated when the trigger occurs.
Series N5700 User’s Guide 71
Page 72
5 Language Reference
[SOURce:]VOLTage:LIMit:LOW <value>|MIN|MAX
[SOURce:]VOLTage:LIMit:LOW? [MIN|MAX]
This command sets the low voltage limit of the output. When a low
voltage limit has been set, the instrument will ignore any
programming commands that attempt to set the output voltage below
the low voltage limit. The*RST value = Max.
The range of values that can be programmed for this command is
coupled with the immediate voltage level setting. The maximum value
for the low voltage limit is either the value in the following table, or
the immediate voltage setting multiplied by 0.95; whichever is lower.
The minimum setting is the value in the table.
Model (V rating) 6V 8V 12.5V 20V 30V 40V 60V 80V 100V 150V 300V 600V
Min. low limit 0 0 0 0 0 0 0 0 0 0 0 0
Max. low limit 5.7 7.6 11.9 19 28.5 38 57 76 95 142 285 570
[SOURce:]VOLTage:PROTection:LEVel <value>|MIN|MAX
[SOURce:]VOLTage:PROTection:LEVel? [MIN|MAX]
This command sets the over-voltage protection (OVP) level of the
output. The values are programmed in volts. If the output voltage
exceeds the OVP level, the output is disabled and OV is set in the
Questionable Condition status register. The*RST value = Max.
The range of values that can be programmed for this command is
coupled with the immediate voltage level setting. The minimum value
for the voltage protection level is either the value in the following
table, or the immediate voltage setting multiplied by 1.05; whichever
is higher. The maximum setting is the value in the table.
An over-voltage condition can be cleared with the Output Protection
Clear command after the condition that caused the OVP trip is
removed.
Model (V rating) 6V 8V 12.5V 20V 30V 40V 60V 80V 100V 150V 300V 600V
Min. protection limit 0.5 0.5 1.0 1.0 2.0 2.0 5.0 5.0 5.0 5.0 5.0 5.0
Max. protection limit 7.5 10 15 24 36 44 66 88 110 165 330 660
72 Series N5700 User’s Guide
Page 73
LOGICAL
OR
LOGICAL
OR
PON
CME
EXE
DDE
QYE
OPC
0
2
3
4
5
7
1
4
8
16
32
128
1
4
8
16
32
128
EVENT ENABLE
STANDARD EVENT
STATUS
STATUS BYTE
SERVICE
REQUEST
ENABLE
LOGICAL
OR
SERVICE
REQUEST
GENERATION
8
16
32
128
8
16
32
128
RQS
OPER
MSS
ESB
MAV
QUES
4
5
6
7
UNR
OT
OV
0
4
QUESTIONABLE STATUS
10
CONDITION
LOGICAL
OR
EVENT ENABLE
PTR/NTR
1
16
1024
1
16
1024
1
16
1024
1
16
1024
3
CONDITION
5
8
PTR/NTR EVENT
ENABLE
CV
CC
32
256
OC
1
WTG
OPERATION STATUS
PF
2
4 4
2
4
4
2
2 2
INH9512
512
512
512
64
10
1024
256
1024
256
1024
256
1024
OUTPUT BUFFER
QUEUE
NOT
EMPTY
Data
Data
Data
*STB?
*SRE<n>
*SRE?
*ESR?
STAT:QUES:COND?
*ESE<n>
*ESE?
STAT:QUES:PTR |: NT R < n>
STAT:QUES:PTR |: NT R ?
STAT:QUES:EVEN?
STAT:QUES:ENAB <n>
STAT:QUES:ENAB
STAT:OPER:COND?
STAT:OPER:EVEN?
STAT:OPER:ENAB <n>
STAT:OPER:ENAB
STAT:OPER:PTR |: NTR <n>
STAT:OPER:PTR |: NTR ?
32 32
32
ERROR QUEUE
QUEUE
NOT
EMPTY
Err
Err
Err
44
2
ERROR
Status Commands
Language Reference 5
Status commands program the power supply’s status registers. As
shown in the following figure, the power supply has three groups of
status registers; Operation, Questionable, and Standard Event. The
Operation and Questionable status groups each consist of the
Condition, Enable, and Event registers and NTR and PTR filters.
Series N5700 User’s Guide 73
Page 74
5 Language Reference
STATus:PRESet
STATus:OPERation[:EVENt]?
The Standard Event group is programmed with Common commands
as described later in this section. Common commands also control
additional status functions such as the Service Request Enable and
the Status Byte registers.
This command sets all defined bits in the Operation and Questionable
PTR registers. The command clears all defined bits in the Operation
and Questionable NTR and Enable registers.
This query returns the value of the Operation Event register. The
Event register is a read-only register, which stores (latches) all events
that are passed by the Operation NTR and/or PTR filter. Reading the
Operation Event register clears it. The bit configuration of the
Operation status registers is as follows:
Bit Position 15-11 10 9 8 7-6 5 4-0
Bit Value
Bit Name
CC = The output is in constant current
CV = The output is in constant voltage
WTG = The unit is waiting for a transient trigger
−
−
1024
CC
−
−
256
CV
−
−
32
WTG
−
−
STATus:OPERation:CONDition?
This query returns the value of the Operation Condition register.
That is a read-only register, which holds the live (unlatched)
operational status of the power supply.
STATus:OPERation:ENABle <value>
STATus:OPERation:ENABle?
This command and its query set and read the value of the
Operational Enable register. This register is a mask for enabling
specific bits from the Operation Event register to set the operation
summary bit (OPER) of the Status Byte register. This bit (bit 7) is the
logical OR of all the Operational Event register bits that are enabled
by the Status Operation Enable register. The Preset value = 0.
74 Series N5700 User’s Guide
Page 75
STATus:OPERation:NTR <value>
STATus:OPERation:PTR <value>
STATus:OPERation:NTR?
STATus:OPERation:PTR?
These commands set or read the value of the Operation NTR
(Negative-Transition) and PTR (Positive-Transition) registers. These
registers serve as polarity filters between the Operation Condition
and Operation Event registers to cause the following actions:
When a bit in the Operation NTR register is set to 1, then a 1-to-0
transition of the corresponding bit in the Operation Condition
register causes that bit in the Operation Event register to be set.
When a bit of the Operation PTR register is set to 1, then a 0-to-1
transition of the corresponding bit in the Operation Condition
register causes that bit in the Operation Event register to be set.
If the same bits in both NTR and PTR registers are set to 1, then
any transition of that bit at the Operation Condition register sets
the corresponding bit in the Operation Event register.
If the same bits in both NTR and PTR registers are set to 0, then
no transition of that bit at the Operation Condition register can
set the corresponding bit in the Operation Event register.
Language Reference 5
The Preset value are: NTR = 0; PTR = 32767
STATus:QUEStionable[:EVENt]?
This query returns the value of the Questionable Event register. The
Event register is a read-only register, which stores (latches) all events
that are passed by the Questionable NTR and/or PTR filter. Reading
the Questionable Event register clears it. The bit configuration of the
Questionable status registers is as follows:
Bit Position 15-11 10 9 8-5 4 3 2 1 0
Bit Value
Bit Name
UNR = The output is unregulated
INH = The output is turned off by one of the external J1 inhibit signals
OT = The output is disabled by the over-temperature protection
PF = The output is disabled because AC power has failed
OC = The output is disabled by the over-current protection
OV = The output is disabled by the over-voltage protection
−
−
1024 512
UNR INH
STATus:QUEStionable:CONDition?
This query returns the value of the Questionable Condition register.
That is a read-only register, which holds the real-time (unlatched)
questionable status of the power supply.
−
−
16
OT
−
4 2 1
−
PF OC OV
Series N5700 User’s Guide 75
Page 76
5 Language Reference
STATus:QUEStionable:ENABle <value>
STATus:QUEStionable:ENABle?
STATus:QUEStionable:NTR <value>
STATus:QUEStionable:PTR <value>
STATus:QUEStionable:NTR?
STATus:QUEStionable:PTR?
This command and its query set and read the value of the
Questionable Enable register. This register is a mask for enabling
specific bits from the Questionable Event register to set the
questionable summary bit (QUES) of the Status Byte register. This bit
(bit 3) is the logical OR of all the Questionable Event register bits that
are enabled by the Questionable Status Enable register. The Preset
value = 0.
These commands set or read the value of the Questionable NTR
(Negative-Transition) and PTR (Positive-Transition) registers. These
registers serve as polarity filters between the Questionable Condition
and Questionable Event registers to cause the following actions:
When a bit of the Questionable NTR register is set to 1, then a 1-
to-0 transition of the corresponding bit of the Questionable
Condition register causes that bit in the Questionable Event
register to be set.
*CLS
When a bit of the Questionable PTR register is set to 1, then a 0-
to-1 transition of the corresponding bit in the Questionable
Condition register causes that bit in the Questionable Event
register to be set.
If the same bits in both NTR and PTR registers are set to 1, then
any transition of that bit at the Questionable Condition register
sets the corresponding bit in the Questionable Event register.
If the same bits in both NTR and PTR registers are set to 0, then
no transition of that bit at the Questionable Condition register
can set the corresponding bit in the Questionable Event register.
The Preset values are: NTR = 0; PTR = 32767
This command causes the following actions on the status system:
Clears the Standard Event Status, Operation Status Event, and
Questionable Status Event registers
Clears the Status Byte and the Error Queue
If *CLS immediately follows a program message terminator
(<NL>), then the output queue and the MAV bit are also cleared.
76 Series N5700 User’s Guide
Page 77
*ESE
Bit Position
7 6 5 4 3 2 1
0
*ESE?
Language Reference 5
This command programs the Standard Event Status Enable register
bits. The programming determines which events of the Standard
Event Status Event register (see *ESR?) are allowed to set the ESB
(Event Summary Bit) of the Status Byte register. A "1" in the bit
position enables the corresponding event.
All of the enabled events of the Standard Event Status Event Register
are logically OR-ed to cause the Event Summary Bit (ESB) of the
Status Byte Register to be set. The query reads the Standard Event
The query reads the Standard Event Status Enable register. The bit
configuration of the Standard Event register is as follows:
*ESR?
*OPC
*OPC?
Bit Value 128
Bit Name PON
PON = Power-on has occurred
CME = Command error
EXE = Execution error
This query reads the Standard Event Status Event register. Reading
the register clears it. The bit configuration is the same as the
Standard Event Status Enable register (see *ESE).
This command causes the instrument to set the OPC bit (bit 0) of the
Standard Event Status register when the instrument has completed
all pending operations. Pending operations are complete when:
All commands sent before *OPC have been executed. This
includes overlapped commands. Most commands are sequential
and are completed before the next command is executed.
Commands that affect output voltage, current or state, relays,
and trigger actions are executed in parallel (or overlapped) with
subsequent commands sent to the power supply. The *OPC
command provides notification that all overlapped commands
have been completed.
−
32 16 8 4
−
CME EXE DDE QUE
DDE = Device-dependent error
QUE = Query error
OPC = Operation complete
−
1
−
OPC
Series N5700 User’s Guide 77
All triggered actions are completed
*OPC does not prevent processing of subsequent commands, but bit 0
will not be set until all pending operations are completed.
*OPC? causes the instrument to place an ASCII "1" in the Output
Queue when all pending operations are completed. Unlike *OPC,
*OPC? prevents processing of all subsequent commands. It can be
used at the end of a command line so that the program can monitor
the bus for data until it receives the "1" from the Output Queue.
Page 78
5 Language Reference
*SRE
*SRE?
*STB?
This command sets the condition of the Service Request Enable
Register. This register determines which bits from the Status Byte
Register are allowed to set the Master Status Summary (MSS) bit and
the Request for Service (RQS) summary bit. A 1 in any Service
Request Enable Register bit position enables the corresponding
Status Byte Register bit and all such enabled bits then are logically
OR-ed to cause Bit 6 of the Status Byte Register to be set.
When the controller conducts a serial poll in response to SRQ, the
RQS bit is cleared, but the MSS bit is not. When *SRE is cleared (by
programming it with 0), the power supply cannot generate an SRQ to
the controller. The query returns the current state of *SRE.
This query reads the Status Byte register, which contains the status
summary bits and the Output Queue MAV bit. Reading the Status
Byte register does not clear it. The input summary bits are cleared
when the appropriate event registers are read. The MAV bit is cleared
at power-on, by *CLS' or when there is no more response data
available.
*WAI
A serial poll also returns the value of the Status Byte register, except
that bit 6 returns Request for Service (RQS) instead of Master Status
Summary (MSS). A serial poll clears RQS, but not MSS. When MSS is
set, it indicates that the power supply has one or more reasons for
requesting service.
Bit Position 7 6 5 4 3 2
Bit Value 128 64 32 16 8 4
Bit Name OPER MSS
(RQS)
OPER = Operation status summary
MSS = Master status summary
(RQS) = Request for service
ESB = Event status byte summary
This command instructs the power supply not to process any further
commands until all pending operations are completed. Pending
operations are as defined under the *OPC command. *WAI can be
aborted only by sending the power supply a Device Clear command.
ESB MAV QUES ERR
MAV = Message available
QUES = Questionable status summary
ERR = Error queue not empty
1 − 0
−
−
78 Series N5700 User’s Guide
Page 79
System Commands
LOCal
The instrument is set to front panel control (front panel keys are active).
REMote
The instrument is set to remote interface control (front panel keys are active).
The front panel keys are disabled (the instrume
remote interface).
SYSTem:COMMunicate:RLSTate LOCal|REMote|RWLock
SYSTem:COMMunicate:RLSTate?
Language Reference 5
System commands control system functions that are not directly
related to output control, measurement, or status functions. Common
commands are also used to control system functions.
This command configures the remote/local state of the instrument
according to the following settings.
RWLock
The remote/local state can also be set by interface commands over
the GPIB and some other I/O interfaces. When multiple remote
programming interfaces are active, the interface with the most
recently changed remote/local state determines the instrument’s
remote/local state.
The remote/local state is unaffected by *RST or any SCPI commands
other than SYSTem:COMMunicate:RLState. At power-on however, the
communications setting always returns to LOCal.
SYSTem:COMMunicate:TCPip:CONTrol?
This query returns the control connection port number. This is used
to open a control socket connection to the instrument. Refer to
chapter 4 under “Using Sockets” for more information.
SYSTem:ERRor?
This query returns the next error number and its corresponding
message string from the error queue. The queue is a FIFO (first-in,
first-out) buffer that stores errors as they occur. As it is read, each
error is removed from the queue. When all errors have been read, the
query returns 0, NO ERROR. If more errors are accumulated than the
queue can hold, the last error in the queue will be -350, TOO MANY
ERRORS (see Appendix C for error codes).
nt can only be controlled via the
SYSTem:VERSion?
This query returns the SCPI version number to which the instrument
complies. The returned value is of the form YYYY.V, where YYYY
represents the year and V is the revision number for that year.
Series N5700 User’s Guide 79
Page 80
5 Language Reference
*IDN?
*OPT?
*RCL <state>
This query requests the power supply to identify itself. It returns a
string of four fields separated by commas.
Keysight Technologies
xxxxxA
0
<A.xx.xx>,<A.xx.xx>
This query requests the unit to identify any installed options. A 0
indicates no options are installed.
This command restores the power supply to a state that was
previously stored in memory locations 0 through 15 with the *SAV
command. Note that you can only recall a state from a location that
contains a previously-stored state.
Manufacturer
Model number followed by a letter suffix
Zero or serial number if available
Firmware revision, power supply revision
NOTE
All saved instrument states are lost when the unit is turned off.
*RST
This command resets the power supply to a factory-defined state.
This state is defined as follows. Note that *RST also forces an ABORt
command. The *RST settings are as follows:
*SAV <state>
This command stores the present state of the power supply to
memory locations 0 through 15.
NOTE
All saved instrument states are lost when the unit is turned off.
CAL:STAT Off [SOUR:]CURR:PROT:STAT Off
INIT:CONT Off [SOUR:]VOLT 0
OUTP Off [SOUR:]VOLT:LIM 0
[SOUR:]CURR 0 [SOUR:]VOLT:TRIG 0
[SOUR:]CURR:TRIG 0 [SOUR:]VOLT:PROT MAXimum
*TST?
80 Series N5700 User’s Guide
Does nothing. This query always returns a zero.
Page 81
Trigger Commands
ABORt
INITiate[:IMMediate][:TRANsient]
INITiate:CONTinuous[:TRANsient] ON|OFF
INITiate:CONTinuous[:TRANsient]?
Language Reference 5
Trigger commands consist of the Abort, Trigger, and Initiate
commands.
commands
This command cancels any trigger actions in progress and returns
the trigger system to the IDLE state, unless INIT:CONT is enabled. It
also resets the WTG bit in the Status Operation Condition register.
ABORt is executed at power-on and upon execution of *RST.
This command controls the enabling of output triggers. When a
trigger is enabled, a trigger causes the specified triggering action to
occur. If the trigger system is not enabled, all triggers are ignored.
Initiate commands initialize the trigger system. Trigger
control the triggering of the power supply.
This command continuously initiates output triggers. The enabled
state is On (1); the disabled state is Off (0). When disabled, the trigger
system must be initiated for each trigger with the INITiate command.
TRIGger[:TRANsient][:IMMediate]
If the trigger system has been initiated, this command generates an
immediate output trigger. When sent, the output trigger will:
Initiate an output change as specified by the CURR:TRIG or
VOLT:TRIG settings.
Clear the WTG bits in the Status Operation Condition register
after the trigger action has completed.
TRIGger:SOURce BUS
TRIGger:SOURce?
This command selects the trigger source for the output trigger
system. Only BUS can be selected as the trigger source.
*TRG
This command generates a trigger when the trigger source is set to
BUS. The command has the same affect as the Group Execute Trigger
(<GET>) command.
Series N5700 User’s Guide 81
Page 82
Page 83
6
Programming Examples
Output Programming Example ........................................................................ 84
Trigger Programming Example ........................................................................ 86
This chapter contains several example programs to help you develop
programs for your own application. The example programs are for
illustration only, and are provided with the assumption that you are
familiar with the programming language being demonstrated and the
tools used to create and debug procedures. See Chapter 5, “Language
Dictionary” for the SCPI command syntax.
NOTE
You have a royalty-free right to use, modify, reproduce and distribute
the example programs (and/or any modified version) in any way you
find useful, provided you agree that Keysight Technologies has no
warranty, obligations, or liability for any example programs.
The example programs are written in Microsoft Visual Basic 6.0 using
the VISA COM IO library. The VISA COM library must be downloaded
from the Automation-Ready CD-ROM to use these programs. For
information about using VISA COM in another Visual Basic project,
refer to “Programming Your Instruments” in the USB/LAN/GPIB
Interfaces Connectivity Guide, also included on the AutomationReady CD-ROM.
Example programs for the following programming environments are also
included on the Product-Reference CD-ROM located at the back of this guide:
Microsoft Visual Basic 6.0
Microsoft Visual C++ 6.0
Microsoft Excel
The CD also contains IVI-COM and LabVIEW drivers for your power supply.
Series N5700 User’s Guide 83
Page 84
6 Programming Examples
Output Programming Example
This program sets the voltage, current, over-voltage, and the overcurrent protection. It turns the output on and takes a voltage
measurement. When done, the program checks for instrument errors
Sub main_EZ()
Dim IDN As String
Dim IOaddress As String
Dim ErrString As String
' This variable controls the voltage
Dim VoltSetting As Double
' This variable measures the voltage
Dim measVolt As Double
' This variable controls the current
Dim CurrSetting As Double
' These variables control the over voltage protection settings
Dim overVoltSetting As Double
' These variables control the over current protection
Dim overCurrOn As Long
'These variable are neccessary to initialize the VISA COM.
Dim ioMgr As KeysightRMLib.SRMCls
Dim Instrument As VisaComLib.FormattedIO488
' The following command line provides the program with the VISA name of the
' interface that it will communicate with. It is currently set to use GPIB.
IOaddress = "GPIB0::5::INSTR"
' Use the following line for LAN communication
' IOaddress="TCPIP0::141.25.36.214"
' Use the following line instead for USB communication
' IOaddress = "USB0::2391::1799::US00000002"
' Initialize the VISA COM communication
Set ioMgr = New KeysightRMLib.SRMCls
Set Instrument = New VisaComLib.FormattedIO488
Set Instrument.IO = ioMgr.Open(IOaddress)
VoltSetting = 3
CurrSetting = 1.5 ' amps
overVoltSetting = 10
overCurrOn = 1 '1 for on, 0 for off
With Instrument
' Send a power reset to the instrument
.WriteString "*RST"
' Query the instrument for the IDN string
.WriteString "*IDN?"
IDN = .ReadString
' Set the voltage
.WriteString "VOLT" & Str$(VoltSetting)
and gives a message if there is an error.
84 Series N5700 User’s Guide
Page 85
' Set the over voltage level
.WriteString "VOLT:PROT:LEV " & Str$(overVoltSetting)
' Turn on over current protection
.WriteString "CURR:PROT:STAT " & Str$(overCurrOn)
' Set the current level
.WriteString "CURR " & Str$(CurrSetting)
' Turn the output on
.WriteString "OUTP ON"
' Make sure that the output is on before continuing
.WriteString "*OPC?"
.ReadString
' Measure the voltage
.WriteString "Meas:Volt?"
measVolt = .ReadNumber
MsgBox "Measured Voltage is " & Str$(measVolt)
' Check instrument for any errors
.WriteString "Syst:err?"
ErrString = .ReadString
' give message if there is an error
If Val(ErrString) Then
MsgBox "Error in instrument!" & vbCrLf & ErrString
End If
End With
End Sub
Programming Examples 6
Series N5700 User’s Guide 85
Page 86
6 Programming Examples
Trigger Programming Example
This example illustrates how to set up and trigger a voltage and
Sub main_Trig()
Dim IDN As String
Dim IOaddress As String
Dim ErrString As String
Dim msg1 As String
' This variable is used to monitor the status
Dim stat As Long
' This variable controls the voltage
Dim VoltSetting As Double
' This variable measures the voltage
Dim MeasureVolt As Double
' This variable controls the current
Dim CurrSetting As Double
' This variable represents the trigger current setting
Dim trigCurrSetting As Double
' This variable controls the triggered voltage setting
Dim trigVoltSetting As Double
' This constant represents the register value for Waiting for Trigger
Const WTG = 32
' These variables are necessary to initialize the VISA COM
Dim ioMgr As KeysightRMLib.SRMCls
Dim Instrument As VisaComLib.FormattedIO488
' The following line provides the VISA name of the GPIB interface
IOaddress = "GPIB0::5::INSTR"
' Use the following line instead for LAN communication
' IOaddress="TCPIP0::141.25.36.214"
' Use the following line instead for USB communication
' IOaddress = "USB0::2391::1799::US00000002"
' Initialize the VISA COM communication
Set ioMgr = New KeysightRMLib.SRMCls
Set Instrument = New VisaComLib.FormattedIO488
Set Instrument.IO = ioMgr.Open(IOaddress)
VoltSetting = 3 ' volts
CurrSetting = 2 ' amps
trigVoltSetting = 5 ' volts
trigCurrSetting = 3 ' amps
With Instrument
' Send a power reset to the instrument
.WriteString "*RST"
' Query the instrument for the IDN string
.WriteString "*IDN?"
IDN = .ReadString
current change. The voltage is measured before and after the trigger.
86 Series N5700 User’s Guide
Page 87
Programming Examples 6
' Set the voltage
.WriteString "VOLT" & Str$(VoltSetting)
' Set the current level
.WriteString "CURR " & Str$(CurrSetting)
' Set the triggered voltage and current levels
.WriteString "VOLT:TRIG " & Str$(trigVoltSetting)
.WriteString "CURR:TRIG " & Str$(trigCurrSetting)
' Turn the output on
.WriteString "OUTP ON"
' Make sure that the output is on
.WriteString "*OPC?"
.ReadString
' Measure the voltage before triggering the change
.WriteString "MEAS:VOLT?"
MeasureVolt = .ReadNumber
' Save the value for later display
msg1$ = "Voltage before trigger = " & Str$(MeasureVolt)
' Initiate the trigger system
.WriteString "INIT"
' Make sure that the trigger system is initiated
Do
.WriteString "STAT:OPER:COND?"
stat = .ReadNumber
Loop Until ((stat And WTG) = WTG)
' Trigger the unit
.WriteString "*TRG"
'Make sure that the trigger is done
.WriteString "*OPC?"
.ReadString
' Measure the voltage after triggering the change
.WriteString "MEAS:VOLT?"
MeasureVolt = .ReadNumber
' Display the measured values
MsgBox msg1$ + Chr$(13) + "Voltage after trigger = " & Str$(MeasureVolt)
' Check instrument for any errors
.WriteString "Syst:err?"
ErrString = .ReadString
' Give message if there is an error
If Val(ErrString) Then
MsgBox "Error in instrument!" & vbCrLf & ErrString
End If
End With
End Sub
Series N5700 User’s Guide 87
Page 88
Page 89
Appendix A
Specifications
Performance Specifications ............................................................................ 90
Supplemental Characteristics ......................................................................... 91
Outline Diagram ................................................................................................. 93
This chapter lists the specifications and supplemental characteristics
of the Keysight N5700 power supplies. A dimensional line drawing of
the unit is included at the end of the chapter.
Unless otherwise noted, specifications are warranted over the
ambient temperature range of 0 to 40°C. Sensing is at the rear
terminals of the power supply after a 30-minute warm-up period.
Sense terminals are externally jumpered to their respective output
terminals.
Supplemental characteristics are not warranted but are descriptions
of typical performance determined either by design or type testing.
Series N5700 User’s Guide 89
Page 90
Appendix A Specifications
Current 1500W 0.1%+
540mA
495mA
360mA
228mA
150mA
114mA
75mA
57mA
45mA
30mA
15mA
7.8mA
Performance Specifications
Keysight Models N5741A – N5752A and N5761A – N5772A
Model
DC Output Ratings:
N5741A
N5761A
NOTE 1
N5742A
N5762A
N5743A
N5763A
N5744A
N5764A
N5745A
N5765A
N5746A
N5766A
N5747A
N5767A
N5748A
N5768A
N5749A
N5769A
N5750A
N5770A
N5751A
N5771A
N5752A
N5772A
Voltage 6V 8V 12.5V 20V 30V 40V 60V 80V 100V 150V 300V 600V
Current 750W 100A 90A 60A 38A 25A 19A 12.5A 9.5A 7.5A 5A 2.5A 1.3A
Current 1500W 180A 165A 120A 76A 50A 38A 25A 19A 15A 10A 5A 2.6A
Power 750W 600W 720W 750W 760W 750W 760W 750W 760W 750W 750W 750W 780W
Power 1500W 1080W 1320W 1500W 1520W 1500W 1520W 1500W 1520W 1500W 1500W 1500W 1560W
Output Ripple and Noise:
NOTE 2
CV p-p
CV rms
60mV 60mV 60mV 60mV 60mV 60mV 60mV 80mV 80mV 100mV 150mV 300mV
NOTE 3
8mV 8mV 8mV 8mV 8mV 8mV 8mV 8mV 8mV 12mV 20mV 60mV
Load Effect: (change from 10% to 90% of full load)
Voltage 2.6mV 2.8mV 3.25mV 4mV 5mV 6mV 8mV 10mV 12mV 17mV 32mV 62mV
Current 750W 25mA 23mA 17mA 12.6mA 10mA 8.8mA 7.5mA 6.9mA 6.5mA 6mA 5.5mA 5.26mA
Current 1500W 41mA 38mA 29mA 20.2mA 15mA 12.6mA 10mA 8.8mA 8mA 7mA 6mA 5.5mA
Source Effect: (change from 85-132 VAC input or 170-265 VAC input)
Voltage 2.6mV 2.8mV 3.25mV 4mV 5mV 6mV 8mV 10mV 12mV 17mV 32mV 62mV
Current 750W 12mA 11mA 8mA 5.8mA 4.5mA 3.9mA 3.25mA 2.95mA 2.75mA 2.5mA 2.25mA 2.13mA
Current 1500W 20mA 18.5mA 14mA 9.6mA 7mA 5.8mA 4.5mA 3.9mA 3.5mA 3mA 2.5mA 2.26mA
Programming Accuracy:
NOTE 1
Voltage 0.05%+ 3mV 4mV 6.25mV 10mV 15mV 20mV 30mV 40mV 50mV 75mV 150mV 300mV
Current 750W 0.1%+ 100mA 90mA 60mA 38mA 25mA 19mA 12.5mA 9.5mA 7.5mA 5mA 2.5mA 1.3mA
Current 1500W 0.1%+ 180mA 165mA 120mA 76mA 50mA 38mA 25mA 19mA 15mA 10mA 5mA 2.6mA
Measurement Accuracy:
Voltage 0.1%+ 6mV 8mV 12.5mV 20mV 30mV 40mV 60mV 80mV 100mV 150mV 300mV 600mV
Current 750W 0.1%+ 300mA 270mA 180mA 114mA 75mA 57mA 37.5mA 28.5mA 22.5mA 15mA 7.5mA 3.9mA
Load Transient Recovery Time:
(time for output voltage to recover within 0.5% of its rated output for a load change from 10 to 90% of its rated output current)
Time ≤ 1.5ms ≤ 1.5ms ≤ 1.5ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 1ms ≤ 2ms ≤ 2ms ≤ 2ms
Voltage set point from 10% to 100% of rated output
NOTE 1
Minimum voltage is guaranteed to a maximum of 0.2% of the rated output voltage.
Minimum current is guaranteed to a maximum of 0.4% of the rated output current.
NOTE 2
20MHz
NOTE 3
From 5Hz - 1MHz
90 Series N5700 User’s Guide
Page 91
Supplemental Characteristics
Up, full load
0.08s
0.08s
0.08s
0.08s
0.08s
0.08s
0.08s
0.15s
0.15s
0.15s
0.15s
0.25s
Down, full load
0.05s
0.05s
0.05s
0.05s
0.08s
0.08s
0.08s
0.15s
0.15s
0.15s
0.15s
0.30s
Down, no load
0.5s
0.6s
0.7s
0.8s
0.9s
1.0s
1.1s
1.2s
1.5s
2.0s
3.0s
4s
Command Response Time: (add this to the output response time to obtain the total programming time)
55 ms
Volts/load lead
1V
1V
1V
1V
1.5V
2V
3V
4V
5V
5V
5V
5V
Over-voltage Protection:
Range
Accuracy
0.06V
0.08V
0.125V
0.20V
0.30V
0.40V
0.60V
0.80V
1V
1.5V
3V
6V
CC rms 750W
200mA
180mA
120mA
76mA
63mA
48mA
38mA
29mA
23mA
18mA
13mA
8mA
CC rms 1500W
360mA
330mA
240mA
152mA
125mA
95mA
75mA
57mA
45mA
35mA
25mA
12mA
Voltage
0.72mV
0.96mV
1.5mV
2.4mV
3.6mV
4.8mV
7.2mV
9.6mV
12mV
18mV
36mV
72mV
Current 750W
12mA
10.8mA
7.2mA
4.56mA
3mA
2.3mA
1.5mA
1.14mA
0.9mA
0.6mA
0.3mA
0.156mA
Current 1500W
21.6mA
19.8mA
14.4mA
9.12mA
6mA
4.6mA
3mA
2.28mA
1.8mA
1.2mA
0.6mA
0.312mA
Front Panel Display Accuracy: (4 digits; +% of rated output; ±1 count)
Voltage
30mV
40mV
62.5mV
100mV
150mV
200mV
300mV
400mV
500mV
750mV
1.5 V
3 V
Current 750W
500mA
450mA
300mA
190mA
125mA
95mA
62.5mA
47.5mA
37.5mA
25mA
12.5mA
6.5mA
Current 1500W
900mA
825mA
600mA
380mA
250mA
190mA
125mA
95mV
75mA
50mA
25m
13mA
Voltage
3mV
4mV
6.25mV
10mV
15mV
20mV
30mV
40mV
50mV
75mV
150mV
300mV
Current 750W
50mA
45mA
30mA
19mA
12.5mA
9.5mA
6.25mA
4.75mA
3.75mA
2.5mA
1.25mA
6.5mA
Current 1500W
90mA
82.5mA
60mA
38mA
25mA
19mA
12.5mA
9.5mA
7.5mA
5mA
2.5mA
1.3mA
Voltage and Current
100PPM/°C from rated output voltage or current
Vout voltage
0 - 100%, 0-5V/10V, user selectable, Accuracy & linearity = +/-0.5% of rated Vout
Iout voltage
0 - 100%, 0-5V/10V, user selectable, Accuracy & linearity = +/-1% of rated Iout
Vout resistance
0 - 100%, 0-5kΩ/10kΩ, user selectable, Accuracy & linearity = +/-1% of rated Vout
Iout resistance
0 - 100%, 0-5kΩ/10kΩ, user selectable, Accuracy & linearity = +/-1.5% of rated Iout
Iout monitor
0-5V/10V, user selectable, Accuracy = 1%
Vout monitor
0-5V/10V, user selectable, Accuracy = 1%
On/Off control
Electrical voltage; 0-6V/2-15V or dry contact, user selectable logic
PS OK signal
5V = OK; 0V = FAIL; 500Ω series resistance
CV/CC signal
CV = TTL high (4-5V) source current 10mA; CC = TTL high (4-5V) sink current 10mA
Enable/Disable
Dry contact. Open=Off, Short=On. Maximum voltage at terminal= 6V.
Keysight Models N5741A – N5752A and N5761A – N5772A
Specifications Appendix A
Model
N5741A
N5761A
N5742A
N5762A
N5743A
N5763A
N5744A
N5764A
N5745A
N5765A
N5746A
N5766A
N5747A
N5767A
N5748A
N5768A
N5749A
N5769A
N5750A
N5770A
N5751A
N5771A
N5752A
N5772A
Output Response Time: (to settle to within ±1.0% of the rated output, with a resistive load)
Remote Sense Compensation:
0.5-7.5V 0.5-10V 1-15V 1-24V 2-36V 2-44V 5-66V 5-88V 5-110V 5-165v 5-330V 5-660V
Output Ripple and Noise: (From 5Hz-1MHz, at 10% to 100% of output voltage at full load (for 6V units from 33% to 100% of output voltage)
Programming Resolution:
Measurement Resolution:
Temperature Drift: (over 8 hours, after a 30 minute warm-up, with constant line, load, and temperature)
Temperature Coefficient: (after a 30 minute warm-up)
Analog Programming and Monitoring:
Series N5700 User’s Guide 91
Page 92
Appendix A Specifications
Interface Capabilities:
Keysight Models N5741A – N5752A and N5761A – N5772A
Model
N5741A
N5761A
N5742A
N5762A
N5743A
N5763A
N5744A
N5764A
N5745A
N5765A
N5746A
N5766A
N5747A
N5767A
N5748A
N5768A
N5749A
N5769A
N5750A
N5770A
N5751A
N5771A
N5752A
N5772A
Series and Parallel Capability:
Parallel operation Up to 4 identical units can be connected in master/slave mode with single–wire current balancing
Series operation Up to 2 identical units can be connected using external protection diodes
Savable states:
In volatile memory 16 (in memory locations 0-15)
GPIB
LXI Compliance
USB 2.0
10/100 LAN
SCPI - 1993, IEEE 488.2 compliant interface
LXI Core 2011 (only apples to units with the LXI label on the front panel)
Requires Keysight IO Library version L.01.01 and up, or 14.0 and up
Requires Keysight IO Library version L.01.01 and up, or 14.0 and up
Environmental Conditions:
Environment
Operating temp.
Storage temp.
Operating humidity
Storage humidity
Altitude
Indoor use, installation category II (AC input), pollution degree 2
0°C to 40°C @ 100% load
–20°C to 70°C
Up to 90% relative humidity (no condensation)
10% to 95% relative humidity (no condensation)
Up to 3000 meters.
Above 2000m, derate the output current by 2%/100m and derate the maximum ambient temperature by 1°C/100m.
(For 1500W models from 60V to 600V, derate either the output current or the ambient temperature, but not both.)
Regulatory Compliance:
EMC
Safety
Complies with European EMC Directive for test and measurement products.
● IEC/EN 61326-1
● CISPR 11, Group 1, class A
● AS/NZS CISPR 11
● ICES/NMB-001
Complies with the Australian standard and carries the C-Tick mark.
This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme NMB-001 du Canada.
Complies with the European Low Voltage Directive and carries the CE-marking.
Conforms to UL 61010-1 and CSA C22.2 61010-1.
Acoustic Noise Declaration:
Statements provided to comply with requirements of the German Sound Emission Directive, from 18 January 1991:
Sound Pressure Lp <70 dB(A), * At Operator Position, * Normal Operation, * According to EN 27779 (Type Test).
Schalldruckpegel Lp <70 dB(A) * Am Arbeitsplatz, * Normaler Betrieb, * Nach EN 27779 (Typprüfung).
Output Terminal Isolation:
6V to 60V units No output terminal may be more than +/- 60 VDC from any other terminal or chassis ground
80V to 600V units No output terminal may be more than +/- 600 VDC from any other terminal or chassis ground
AC Input:
Nominal Input
Input Current 750W
Input Current 1500W
Input Range
Power Factor
Efficiency
Inrush Current
100 – 240 VAC; 50/60Hz
10.5A @ 100 VAC nominal; 5A @ 200 VAC nominal
21A @ 100 VAC nominal; 11A @ 200 VAC nominal
85 – 265 VAC; 47 – 63 Hz.
0.99 at nominal input and rated output power
76% – 87% for 750W units; 77% – 88% for 1500W units
< 25A for 750W units; < 50 A for 1500W units
92 Series N5700 User’s Guide
Page 93
Outline Diagram
6.8x10mm
6.8mm
Specifications Appendix A
467.0+/-1.0mm
43.6mm
I
O
POWER
+S+LSNC-LC-S
J2
SW1
1 2 3 4 5 6 7 8 9
O
N
OF
F
100V/7.5A 750W
N5749A
System DC Power Supply
GPIB
ANALOG PROGRAMMING
J1
LINK
10/100 Ethernet
TX
NOT ACTIVE
507.0+/-1.0mm
AAA
57.8+/-0.5
92.0+/-0.5 92.0+/-0.5
433+/-1.0mm
Strain-Relief Detail
1500W Models
m
m
5
3
482.8+/-1.0mm
422.8+/-1.0mm
+V -V
Bus-Bar Detail
6V to 60V Models
3.0mm
VOLTAGE DC VOLTS DC AMPS CURRENT
OVP
PROT FINE LIMIT UVL OCP/488 LAN OUT ON
AC
INPUT
3
9
.
5
+
/
-
0
.
5
m
m
31.8mm
Series N5700 User’s Guide 93
22.0mm
30.0mm
8.5mm
NOTES:
Holes marked “A” are for chassis slide mounting.
Use only screws designated #10-32x0.38” maximum.
Page 94
Page 95
Appendix B
Verification and Calibration
Verification ......................................................................................................... 96
Calibration ........................................................................................................ 115
The verification procedures described in this appendix verify that the
power supply is operating normally and is within published
specifications.
This appendix also includes calibration procedures for the Keysight
N5700 power supplies. Instructions are given for performing the
procedures from a controller over the GPIB.
NOTE
Perform the verification tests before calibrating your power supply. If the power
supply passes the verification tests, the unit is operating within its calibration
limits and does not need to be re-calibrated.
The recommended calibration interval for Keysight N5700 power
supplies is one year.
Series N5700 User’s Guide 95
Page 96
Appendix B Verification and Calibration
properly calibrated.
Calibration
These procedures calibrate the power supply.
Digital Voltmeter
Resolution: 10 nV @ 1V;
Keysight 3458A or equivalent
Load Resistor
For 750 W models:
Electronic Load
150 V, 100 A minimum (for Models N5741- N5750A)
Keysight N3300A mainframe,
Verification
Verification procedures verify that the power supply is operating
normally and is within published specifications. There are two types
of verification tests:
Performance
These tests verify that the power supply meets all of the specifications listed
in Appendix A. They can also be used to verify that the power supply is
If the power supply fails any of the tests or if abnormal test results
are obtained, try calibrating the unit. If calibration is unsuccessful,
return the unit to a Keysight Technologies repair facility (see
Appendix D).
Equipment Required
The equipment listed in the following table, or the equivalent to this
equipment, is required for the calibration and performance tests. A
test record sheet may be found at the back of this section.
Type Specifications Recommended Model
Readout: 8 1/2 digits
Accuracy: 20 ppm
Current Monitor
15 A (0.1Ω) 0.04%, TC=5ppm/°C
100 A (0.01Ω) 0.04%, TC=5ppm/°C
300 A (0.001Ω) 0.04%, TC=5ppm/°C
Guildline 9230/15
Guildline 9230/100
Guildline 9230/300
GPIB Controller Full GPIB capabilities (for calibrating the unit over the GPIB) Keysight 82350B or equivalent
Oscilloscope Sensitivity: 1 mV
RMS Voltmeter True RMS
Differential Amplifier Bandwidth: 20 MHz LeCroy DA1855A, DA1850A,
Differential Probe 100:1/10:1 selectable LeCroy DXC100A or eqivalent
Terminations 1 – 50Ω BNC termination
Variable-voltage
xfmr or AC source
96 Series N5700 User’s Guide
0.06Ω, 0.09Ω, 0.21Ω, 0.53Ω, 1.20Ω, 2.11Ω, 4.80Ω, 8.42Ω,
13.33Ω, 30.0Ω, 120Ω, 462Ω - all resistors 1kW minimum.
For 1500 W models:
0.03Ω, 0.04Ω, 0.10Ω, 0.26Ω, 0.60Ω, 1.05Ω, 2.40Ω, 4.21Ω,
6.67Ω, 15.0Ω, 60Ω, 231Ω - all resistors 2kW minimum.
150 V, 180 A minimum (for Models N5761- N5770A)
Bandwidth Limit: 20 MHz
Probe: 1:1 with RF tip
Bandwidth: 20 MHz
Sensitivity: 100 µV
Adjustable to highest rated input voltage range.
Power: 2000 VA
with 3 - N3305A modules
Keysight Infiniium or
equivalent
Rhode and Schwartz Model
URE3 or equivalent
or equivalent
Keysight 6813B or equivalent
Page 97
Measurement Techniques
A.
Electronic load
or resistor
DC voltmeter,
scope, or
rms voltmeter
Load
Resistor
+
+
+
B.
Differential amplifier
C.
Scope or
rms voltmeter
Current
shunt
+
DC voltmeter,
scope, or
rms voltmeter
+
Electronic load
or resistor
output
50 ohm
termination
input
BNC
+V -V
Power Supply
+S +LS -LS -S
+V -V
Power Supply
+S +LS -LS -S
+V -V
Power Supply
+S +LS -LS -S
Differential
probe pair
Electronic Load
Many of the test procedures require the use of a variable load capable
of dissipating the required power. If a variable resistor is used,
switches should be used to either; connect, disconnect, or short the
load resistor. For most tests, an electronic load can be used. The
electronic load is considerably easier to use than load resistors, but it
may not be fast enough to test transient recovery time and may be
too noisy for the noise (PARD) tests.
Fixed load resistors may be used in place of a variable load, with
minor changes to the test procedures. Also, if computer controlled
test setups are used, the relatively slow (compared to computers and
system voltmeters) settling times and slew rates of the power supply
may have to be taken into account. "Wait" statements can be used in
the test program if the test system is faster than the power supply.
Current-Monitoring Resistor
The 4-terminal current shunt is used to eliminate output current
measurement error caused by voltage drops in the load leads and
connections. It has special current-monitoring terminals inside the
load connection terminals. Connect the voltmeter directly to these
current-monitoring terminals.
Verification and Calibration Appendix B
Test Set-up
The following figure illustrates the test set-up used for the
verification procedures.
Series N5700 User’s Guide 97
Page 98
Appendix B Verification and Calibration
WARNING
SHOCK HAZARD Before starting the verification procedures, check to make
sure that the startup mode is set to Safe-Start (see page 42).
Constant Voltage Tests
Refer to the appropriate test record in the following section for the
instrument settings for each of the following tests.
Voltage Programming and Readback Accuracy
Test category = performance, calibration
This test verifies that the voltage programming and measurement
functions are within specifications.
1 Turn off the power supply and connect a DVM directly across the
+S and -S terminals as shown in figure A. Do not connect a load.
2 Turn on the power supply and program the output voltage to zero
and the output current to its maximum programmable value
(Imax) with the load off. The CV annunciator should be on and
the output current reading should be approximately zero.
3 Record the output voltage readings on the digital voltmeter
(DVM) as well as the measurement readback. The readings
should be within the limits specified in the test record card for
the appropriate model under Voltage Programming and
Readback, Minimum Voltage Vout.
4 Program the output voltage to its full-scale rating.
5 Record the output voltage readings on the DVM as well as the
measurement readback. The readings should be within the limits
specified in the test record card for the appropriate model under
Voltage Programming and Readback, High Voltage Vout.
CV Load Effect
Test category = performance
This test measures the change in output voltage resulting from a
change in output current from full load to no load.
1 Turn off the power supply and connect a DVM and an electronic
load as shown in figure A.
2 Turn on the power supply and program the output current to its
maximum programmable value (Imax) and the output voltage to
its full-scale value.
3 Set the electronic load for the output’s full-scale current. The CV
annunciator on the front panel must be on. If it is not, adjust the
load so that the output current drops slightly.
4 Record the output voltage reading from the DVM.
5 Open the load and record the voltage reading from the DVM
again. The difference between the DVM readings in steps 4 and 5
is the load effect, which should not exceed the value listed in the
test record card for the appropriate model under CV Load Effect.
98 Series N5700 User’s Guide
Page 99
Verification and Calibration Appendix B
CV Source Effect
Test category = performance
This test measures the change in output voltage that results from a
change in AC line voltage from the minimum to maximum value
within the line voltage specifications.
1 Turn off the power supply and connect the ac power line through
a variable voltage transformer.
2 Connect a DVM and an electronic load as shown in figure A. Set
the variable voltage transformer to nominal line voltage.
3 Turn on the power supply and program the output current to its
maximum programmable value (Imax) and the output voltage to
its full-scale value.
4 Set the electronic load for the output’s full-scale current. The CV
annunciator on the front panel must be on. If it is not, adjust the
load so that the output current drops slightly.
5 Adjust the transformer to the low-line voltage (85 VAC for
100/120 nominal line; 170 VAC for 200/240 nominal line).
6 Record the output voltage reading from the DVM.
7 Adjust the transformer to the high-line voltage (132 VAC for
100/120 nominal line; 265 VAC for 200/240 nominal line).
8 Record the output voltage reading on the DVM. The difference
between the DVM reading in steps 6 and 8 is the source effect,
which should not exceed the value listed in the test record card
for the appropriate model under CV Source Effect.
CV Noise
Test category = performance
Periodic and random deviations in the output combine to produce a
residual AC voltage superimposed on the DC output voltage. This
residual voltage is specified as the rms or peak-to-peak output
voltage in the frequency range specified in Appendix A.
1 Turn off the power supply and connect the load resistor,
differential amplifier, and an oscilloscope (ac coupled) to the
output as shown in figure C. Use the indicated load resistor for
750W outputs; use the indicated load resistor for 1500W outputs.
2 As shown in the diagram, use the differential probe to connect
the differential amplifier to the + and - output terminals. The
shields of the two probes should be connected together. Connect
the output of the differential amplifier to the oscilloscope with a
50 Ω termination at the input of the oscilloscope.
3 Set the differential amplifier to multiply by ten, divide by one,
and 1 Megohm input resistance. The positive and negative inputs
of the differential amplifier should be set to AC coupling. Set the
oscilloscope’s time base to 5 ms/div, and the vertical scale to 10
mV/div. Turn the bandwidth limit on (usually 20 or 30 MHz), and
set the sampling mode to peak detect.
Series N5700 User’s Guide 99
Page 100
Appendix B Verification and Calibration
tttt
t
v
Loadi ng
Tr ansi ent
Unl oadi ng
Tr ansi ent
v
t
4 Program the power supply to program the output current to its
5 Disconnect the oscilloscope and connect an ac rms voltmeter in
Transient Recovery Time
Test category = performance
maximum programmable value (Imax) and the output voltage to
its full-scale value and enable the output. Let the oscilloscope run
for a few seconds to generate enough measurement points. On
the Keysight Infiniium scope, the maximum peak-to-peak voltage
measurement is indicated at the bottom of the screen on the right
side. Divide this value by 10 to get the CV peak-to-peak noise
measurement. The result should not exceed the peak-to-peak
limits in the test record form for the appropriate model under CV
Ripple and Noise, peak-to-peak.
(If the measurement contains any question marks, clear the
measurement and try again. This means that some of the data
received by the scope was questionable.)
its place. Do not disconnect the 50 Ω termination. Divide the
reading of the rms voltmeter by 10. The result should not exceed
the rms limits in the test record card for the appropriate model
under CV Ripple and Noise - rms.
This measures the time for the output voltage to recover to within the
specified value following a 10% to 90% change in the load current.
1 Turn off the power supply and connect the output as in figure A
with the oscilloscope across the +S and -S terminals.
2 Turn on the power supply and program the output current to its
maximum programmable value (Imax) and the output voltage to
its full-scale value. Do not program voltages greater than 200
VDC when testing the 300 and 600 volt models.
3 Set the electronic load to operate in constant current mode.
Program its load current to 10% of the power supply’s full-scale
current value.
4 Set the electronic load's transient generator frequency to 100 Hz
and its duty cycle to 50%.
5 Program the load's transient current level to 90% of the power
supply's full-scale current value. Turn the transient generator on.
6 Adjust the oscilloscope for a waveform similar to that shown in
the following figure.
7 The output voltage should return to within the specified voltage
in the specified time following the 10% to 90% load change. Check
both loading and unloading transients by triggering on the
positive and negative slope. Record the voltage at time “t” in the
performance test record card under Transient Response.
100 Series N5700 User’s Guide
Loading...