User’s Guide
Keysight Series N5700
System DC Power
Supply
Legal Notices
© Keysight Technologies 2004, 2014
No part of this document may be
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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
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with regard to this manual and any
information contained herein, including
but not limited to the implied
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fitness for a particular purpose.
Keysight shall not be liable for errors or
for incidental or consequential
damages in connection with the
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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
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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://www.keysight.com/go/conformi
ty 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
www.keysight.com/environment/produ
ct 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.
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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
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Restricted Rights Legend
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granted to the federal government
include only those rights customarily
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technical data pursuant to FAR 12.211
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(Computer Software) and, for the
Department of Defense, DFARS
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Commercial Items) and DFARS
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Computer Software or Computer
Software Documentation).
Trademarks
Microsoft and Windows are U.S.
registered trademarks of Microsoft
Corporation.
Series N5700 User’s Guide
3
Safety Notices
current
current
Neutral conductor on
permanently installed
equipment
equipment.
switch is off
push 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
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
CAUTION
WARNING notice until the
indicated conditions are fully
understood and met.
Safety Symbols
Direct current
Alternating current
Both direct and
alternating
Three phase alternating
Earth (ground) terminal
Protective earth ground
terminal.
Frame or chassis
terminal
Terminal is at earth
potential.
Line conductor on
permanently installed
On supply
Off supply
Standby supply. Unit is not
completely disconnected
from ac mains when
In position of a bi-stable
Out position of a bi-stable
Caution, risk of electric
shock
Caution, hot surface
Caution, refer to
accompanying
4 Series N5700 User’s Guide
In this Book
NOTE
Technologies at one of the following telephone
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.
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
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:
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.
www.keysight.com/find/assist
Series N5700 User’s Guide 5
Contents
1 Quick Reference .......................................................................................................... 9
2 Installation ................................................................................................................ 17
The Keysight N5700 DC Power Supplies – At a Glance ............... 10
The Front Panel - At a Glance ....................................................... 12
The Rear Panel – At a Glance ........................................................ 14
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
System Commands ........................................................................ 79
Trigger Commands ......................................................................... 81
6 Series N5700 User’s Guide
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
Series N5700 User’s Guide 7
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.
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 built-in remote
communication interfaces.
Output Features
• Constant voltage/constant current with automatic crossover.
System Features
• 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 instrumen
di
rectly from an internet browser on your computer.
• Zero-gap stacking - no ventilation holes at the top and bott
surface of the power supply.
• Universal input voltage with active power factor correction.
• Fan speed control for low noise and extended fan life.
t
om
10 Series N5700 User’s Guide
Programmable Functions
Model
Voltage
Range
Current
Range
Model
Voltage
Range
Current
Range
• 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
N5741A
N5742A
N5743A
N5744A
N5745A
N5746A
N5747A
N5748A
N5749A
N5750A
N5751A
N5752A
Minimum output voltage is ≤ 0.2% of the rated output voltage.
Minimum output current is ≤ 0.4% of the rated output current.
0 – 6V
0 – 8V
0 – 12.5V 0 – 60A
0 – 20V
0 – 30V
0 – 40V
0 – 60V
0 – 80V
0 – 100V 0 – 7.5A
0 – 150V 0 – 5A
0 – 300V 0 – 2.5A
0 – 600V 0 – 1.3A
0 – 100A
0 – 90A
0 – 38A
0 – 25A
0 – 19A
0 – 12.5A
0 – 9.5A
N5761A
N5762A
N5763A
N5764A
N5765A
N5766A
N5767A
N5768A
N5769A
N5770A
N5771A
N5772A
0 – 6V
0 – 8V
0 – 12.5V 0 – 120A
0 – 20V 0 – 76A
0 – 30V 0 – 50A
0 – 40V 0 – 38A
0 – 60V 0 – 25A
0 – 80V 0 – 19A
0 – 100V 0 – 15A
0 – 150V 0 – 10A
0 – 300V 0 – 5A
0 – 600V 0 – 2.5A
0 – 180A
0 – 165A
Series N5700 User’s Guide 11
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
1 – VOLTAGE knob
2 – CV indicator
3 – DC VOLTS display
4 – DC AMPS display
5 – CC indicator
6 – CURRENT knob
7 – OUT ON button
8 – OUT ON indicator
The Front Panel - At a Glance
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.
When lit, indicates that the unit is operating in constant voltage mode – with the
output voltage being held constant.
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.
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.
When lit, indicates that the unit is operating in constant current mode – with the
output current being held constant.
Adjusts the output current.
Output function: Press OUT ON to turn the output on or off. Press OUT ON to
reset 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
display cycles between SAF and AU7. Releasing the OUT ON button while one of
the modes is displayed selects that mode.
and hold the OUT ON button to toggle between Safe-Start and Auto-Restart. The
12 Series N5700 User’s Guide
When lit, indicates that the output is enabled or on.
Quick Reference 1
9 – LAN button
10 – LAN indicator
11 – OCP/488 button
12 – OCP indicator
13 – OVP/UVL button
14 – LIMIT button
15 – LIMIT indicator
16 – FINE button
17 – FINE indicator
18 – PROT indicator
19 – POWER switch
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.
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.
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.
When lit, indicates that over-current protection is enabled or on.
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.
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
If the display indicates rLFP, the front panel has been locked by a remote
mode.
programming command.
When lit, indicates that the LIMIT button is pressed.
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).
When lit, indicates that the unit is in Fine adjustment mode.
When blinking, indicates that a fault has occurred.
OVP, OCP, OTP, Enable fail, and AC fail detection will cause the PROT indicator to
The PROT indicator may blink and the display indicate AC for a few seconds
blink.
after the unit is turned off because of residual
energy inside the unit.
Series N5700 User’s Guide 13
Turns the power supply on or off.
1 Quick Reference
9
5
7
3
8
4
6
1
2
750W
1500W6V - 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
!
!
1 – AC input connector
2 – DC output connector
3 – USB connector
4 – LAN connector
5 – Analog Programming
connector
6 – SW1 setup switch
7 – Remote Sense
connector
8 – GPIB connector
9 – Ground screw
WARNING
SHOCK HAZARD The power cord provides a chassis ground through a
third conductor. Be certain that your power outlet is of the threeconductor type with the correct pin connected to earth ground
The Rear Panel – At a Glance
Wire clamp connector for 1500W output models.
IEC connector for 750W output models.
Wire clamp connector for 80V to 600V models.
Bus bars for 6V to 60V models.
Connector for connecting to a USB interface. See chapter 4 for setup.
Connector for connecting to a LAN interface. LINK LED indicates link
integrity. 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)
Nine-position switch for selecting remote programming and monitoring
modes for Output Voltage, Current Limit and other control functions.
(See next page for details)
Connector for making remote sensing connections for regulating the
load voltage and compensating for wiring voltage drop. (See next page
for details)
Connector for connecting to a GPIB interface. See chapter 4 for setup.
M4x8 screws for making chassis ground connections
14 Series N5700 User’s Guide
J2 Sense Connector
1 – Remote sense (+)
2 – Local sense (+)
3 – Not used
4 – Local sense (–)
5 – Remote sense (–)
1 – Output voltage,
voltage programming
2 – Output current,
current programming
3 – Programming range
(voltage/resistance)
4 – Voltage and Current
monitoring range
5 – Shut-Off Logic Select
6 – Not Used
7 – Output voltage,
resistive programming
8 – Output current,
resistive programming
9 – Enable/Disable control
1
2
3
4
5
6
7
8
9
T
he factory-shipped configuration is shown in the figure.
SW1 Setup Switch
Quick Reference 1
The factory-shipped setting is Down for all switches.
Down: The output voltage is programmed by the front panel.
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.
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.
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.
Series N5700 User’s Guide 15
Down: The J1 Enable+/Enable– pins are not active.
Up: The J1 Enable+/Enable– pins are active.
1 Quick Reference
Pin 1:
Enable IN
Pin 2, 3:
Chassis Common
Pin 4–7:
Not Used
Pin 8:
Local/Analog
Pin 9:
Voltage Program
Pin 10:
Current Program
Pin 11:
Voltage Monitor
Pin 12:
Common
Pin 13:
CV/CC
Pin 14:
Enable OUT
Pin 15:
Shut Off
Pin 16:
Power Supply OK
Pin 17–20:
Not Used
Pin 21:
Local/Analog State
Pin 22:
Voltage Prog. Return
Pin 23:
Current Prog. Return
Pin 24:
Current Monitor
Pin 25:
Parallel
141516
1718
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
T
he factory-shipped default configuration is Local operation, which does
not require connection to J1.
Connect Pin 1 to Pin 14 to enable the output. Disconnect to disable the
output.
Signal return for Pin 15 and Pin 16. Connected to chassis.
No connection
Input for selecting between front panel or analog programming of the
output.
Input for voltage or resistance programming of the output voltage.
Input for voltage or resistance programming of the output current.
Output for monitoring the output voltage.
Signal return for Pin 8, Pin11, Pin 13, and Pin 24. Connected internally to –S.
Output for constant voltage/constant current mode indication.
Connect Pin 14 to Pin 1 to enable the output. Disconnect to disable the
output.
Input for Shut-Off control of the output. Referenced to Chassis Common.
Output to indicate the power supply status. Referenced to Chassis Common.
No connection
Output for indication of local or analog programming mode.
16 Series N5700 User’s Guide
Signal return for Pin 9. Connected internally to –S.
Signal return for Pin 10. Connected internally to –S.
Output for monitoring the output current.
Output for current balancing in parallel operation.
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.
2 Installation
750 W Models
1500 W Models
Item Description
Item Description
General Information
Models
Items Supplied
N5741A – N5749A
N5750A – N5752A
N5761A – N5769A
N5770A – N5772A
Accessories
Power Cord
Strain relief assembly
AC input cover
Analog connector
Shield assembly
Hardware
Documentation Set
Certificate of
Calibration
Automation-Ready
CD-ROM
A power cord appropriate for your location
750W units are supplied with terminated power cords
1500W units are supplied with unterminated power
cords
A strain relief assembly for unterminated power cords
(only used for 1500W units)
A cover for the AC input on which the strain relief
assembly is mounted (only used for 1500W units)
A DB25 subminiature connector plug for analog
control connections
A shield for the output terminal connections
Nuts, washers, and bolts for connecting load leads to
output bus bars (only used for 6V to 60V units)
Contains User’s Guide with Product Reference CD-
RO
M
A certificate of calibration referenced to the serial
number
E2094N - contains Keysight IO Libraries Suite
N5740A
Rack-mount slide kit for installing in system II cabinets
18 Series N5700 User’s Guide
Inspecting the Unit
WARNING
Do not operate the instrument in the presence of flammable gasses or
fumes
NOTE
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
Airflow
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
2 Installation
CAUTION
WARNING
SHOCK HAZARD To prevent electric shock, unplug the unit before
cleaning.
Rack Installation
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:
. U
1
se the front panel rack-mount brackets to install the power supply i
e rack.
th
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 th
s
pecified screw length only.
e
n
Cleaning
Use a dry cloth or one slightly dampened with water to clean the
external case parts. Do not attempt to clean internally.
20 Series N5700 User’s Guide
Connecting the Line Cord
WARNING
SHOCK HAZARD The power cord provides a chassis ground through a
third conductor. Be certain that your power outlet is of the threeconductor 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
The detachable power cord may be used as an emergency disconnecting
CAUTION
device. 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.
Installation 2
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
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)
Series N5700 User’s Guide 21
longer than the other wires. Strip 14 mm (0.55 in) at the end of
each of the wires.
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 in-lbs).
• Slide the wire compression nut over the AC cable. Insert th
tripped wires through the strain relief base until the outer cabl
s
acket is flush with the inside edge of the base. Place a wrench
j
e
on the base to keep it from turning. Now tighten the
compression nut to the base (14-16.2 in-lbs) while holding the
cable in place. Now the cable is securely fastened inside th
train relief. Refer to the following figure.
s
e
• Route the AC wires to the input connector terminals as required.
To connect the wires, loosen the terminal screw, insert th
tripped wire into the terminal, and tighten the screw securely
s
e
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.
e
22 Series N5700 User’s Guide
Connecting the Load
WARNING
SHOCK HAZARD Turn off AC power before making rear panel
connections. All wires and straps must be properly connected with
screws securely tightened.
WARNING
FIRE HAZARD To satisfy safety requirements, select a wire size heavy
enough 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.
Wire
size
AWG
Resistance
Ω/1000 foot
Maximum length in feet to limit voltage to 1 V
for 5 A for 10 A for 20A for 50A for
150A
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
80 32
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
Wire Size
Installation 2
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
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.
8
0.6285
320
160
10
Series N5700 User’s Guide 23
2 Installation
Cross
section
(mm2)
Resistance
Ω/kilometer
Maximum length in meters to limit voltage to 1 V
for 5 A for 10 A for 20A for 50A for 150A
16
1.24
160
80.0
40.0
16.0
5.4
35
0.565
354
177
88.0
35.4
11.8
WARNING
CAUTION
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.
2.5
4
6
10
25
8.21
5.09
3.39
1.95
0.795
24.0 12.0
39.2 18.6
59.0 29.4
102
250
Load Connections for 6V to 60V Models
SHOCK HAZARD Hazardous voltages may exist at the outputs and the
load connections when using a power supply with a rated output greater
than 60V. To protect personnel against accidental contact with
hazardous voltages, 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 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 busbars.
51.2
125
6.0
9.8
14.8
25.6
62.0
2.4
4.0
5.8
10.2 3.4
25.2 8.4
0.8
1.4
2.0
24 Series N5700 User’s Guide
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.
Install the shield after you have finished connecting the load wires.
WARNING
Wire Size:
Stripping Length:
Torque:
Shield
Load wires
Negative (-)
Outp
ut/Return
Positive Output (+)
+V
-V
Load Connections for 80V to 600V Models
SHOCK HAZARD Hazardous voltages may exist at the outputs and the
load connections when using a power supply with a rated output greater
than 60V. To protect personnel against accidental contact with hazardous
voltages, 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 output voltage of the power supply.
Installation 2
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:
AWG 18 to AWG 10
10 mm (0.39 in.)
6.5 - 7 in-lb.
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
2 Installation
WARNING
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.
Output Voltage Sensing
26 Series N5700 User’s Guide
• Ensure that the wire length inside the shield is long enough to
provide proper strain relief.
SHOCK HAZARD There is a potential shock hazard at the sense
connector when using a power supply with a rated output greater than
60V. 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.
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
NOTE
-
-
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.
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.
Remote Sensing
Use remote sensing in applications where load regulation at the load is
critical. Remote sensing allows the power supply to compensate for the
voltage drop in the load leads. See Appendix A under Remote Sense
Compensation 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.
To configure the power supply for remote sensing:
• Turn off the power supply.
• Remove the local sense jumpers from the J2 connector.
Series N5700 User’s Guide 27
2 Installation
NOTE
CAUTION
-
-
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.
• 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.
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.
Internal components between +V and +Local sense and between –V and
–Local sense can fail if the voltage drop across the load leads exceeds
the allowable voltage drop on the leads (see Appendix A, Remote Sense
ompensation). This can happen when using excessively long load leads.
C
Load Considerations
Multiple Loads
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.
28 Series N5700 User’s Guide
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
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
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.
Where positive load transients such as back EMF from a motor may
Series N5700 User’s Guide 29
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.
2 Installation
CAUTION
source, the power supply will continuously sink current from the external
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.
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.
For models greater than 60 VDC rated output, no point on the Negative
output shall be more than ±400 VDC above or below chassis ground.
CAUTION
Battery Charging
If a battery or external voltage source is connected across the output
and the output is programmed below the battery or external voltage
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.
Parallel Connections
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
.
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
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