Keysight Technologies N8900 Series User manual

Installation Guide
Keysight N8900 Series
Prewired Rack System

Keysight N8900 Rack System Installation Guide 3
Legal Notices
Copyright Notice
© Keysight Technologies 2015
No part of this manual may be
reproduced in any form or by any means
(including electronic storage and
retrieval, or translation into a foreign
language) without prior agreement and
written consent from Keysight
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
5991-3411
Edition
Edition 3, July 2015
Printed in:
Printed in Germany
Published by
Keysight Technologies, Inc.
550 Clark Drive
Budd Lake, NJ 07828 USA
Technology 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.
Waste Electrical and
Electronic Equipment (WEEE)
Directive 2002/96/EC
This product complies with the WEEE
Directive 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
your local Keysight office, or see
http://about.keysight.com/en/company
info/environment/takeback.shtml for
more information.
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal
Acquisition Regulation (“FAR”) 2.101.
Pursuant to FAR 12.212 and 27.405-3
and Department of Defense FAR
Supplement (“DFARS”) 227.7202, the
U.S. government acquires commercial
computer software under the same terms
by which the software is customarily
provided to the public. Accordingly,
Keysight provides the Software to U.S.
government customers under its standard
commercial license, which is embodied in
its End User License Agreement (EULA), a
copy of which can be found at
www.keysight.com/find/sweula. The
license set forth in the EULA represents
the exclusive authority by which the U.S.
government may use, modify, distribute,
or disclose the Software. The EULA and
the license set forth therein, does not
require or permit, among other things,
that Keysight: (1) Furnish technical
information related to commercial
computer software or commercial
computer software documentation that is
not customarily provided to the public; or
(2) Relinquish to, or otherwise provide,
the government rights in excess of these
rights customarily provided to the public
to use, modify, reproduce, release,
perform, display, or disclose commercial
computer software or commercial
computer software documentation. No
additional government requirements
beyond those set forth in the EULA shall
apply, except to the extent that those
terms, rights, or licenses are explicitly
required from all providers of commercial
computer software pursuant to the FAR
and the DFARS and are set forth
specifically in writing elsewhere in the
EULA. Keysight shall be under no
obligation to update, revise or otherwise
modify the Software. With respect to any
technical data as defined by FAR 2.101,
pursuant to FAR 12.211 and 27.404.2 and
DFARS 227.7102, the U.S. government
acquires no greater than Limited Rights
as defined in FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any
technical data.
This equipment does not contain any
software.
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.
Safety Information
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.
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.
WARNING
CAUTION

4 Keysight N8900 Rack System Installation Guide
Safety Notices
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
The equipment is for industrial use.
Equipment operators are subject to all
applicable safety regulations. Along with
the warning and safety notices in this
manual, all relevant safety, accident
prevention, and environmental
regulations must also be followed. In
particular, the operators of the
equipment:
•Must be informed of the relevant safety
requirements.
•Must have read and understood the
operating manual before using the
equipment.
•Must use the designated and
recommended safety equipment.
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 operating instructions.
Grounding
This is a Safety Class 1 product and has a
protective earth (ground) terminal. To
minimize shock hazard, the instrument
must be connected to the AC 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 injury or death.
Leakage Current
Due to types of products that can be
installed in this cabinet, there is a risk of
high leakage current. Reliable ground
circuit continuity is vital for safe operation
of this product. To reduce the risk of
electric shock, earth (ground) connection
is essential before connecting the power
supply. Never operate this cabinet with
the ground conductor disconnected.
Hazardous Voltages
HAZARDOUS VOLTAGES All models
generate voltages in excess of 60 VDC,
with some models rated at up to 1,500
VDC! Ensure that all instrument
connections, load wiring, and load
connections are either insulated or
covered so that no accidental contact
with lethal output voltages can occur.
Cabinet Stability
To reduce the risk of cabinet instability,
always install the power supplies starting
from the bottom of the rack and continue
to the top of the rack. Install a filler panel
in any unused instrument trays.
Before Applying Power
SHOCK HAZARD Always turn off the
external disconnect device before
opening the rear door.
Only operate the product at the rated
mains voltage and phase as stipulated on
the input label.
All connections must be made by
qualified personnel who are aware of the
hazards involved. Improper actions can
cause fatal injury as well as equipment
damage.
Never touch cables or connections
immediately after turning off the unit.
Depending on the model, lethal voltages
can remain at the output terminals for up
to 10 seconds after turn-off. Verify that
there is no dangerous voltage on the
output or sense terminals before touching
them.
Environmental Conditions
Do not operate the equipment in the
presence of flammable gases or fumes.
Environmental conditions are described
under Common Characteristics.
Do Not Open Cabinet Doors
Only qualified, service-trained personnel
who are aware of the hazards involved
should open cabinet doors. Always
disconnect external power before opening
cabinet doors.
Do Not Modify the Instrument
Do not install substitute parts or perform
any unauthorized modification to the
product.
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.
Safety Symbols
Direct current
Alternating current
Frame or chassis terminal
Standby supply. Unit is not
completely disconnected
from ac mains when switch
is off
Caution, risk of electric
shock
Caution, refer to
accompanying description
Protective earth ground
terminal.
Contains one or more of the
6 hazardous substances
above the maximum
concentration value (MCV),
40 Year EPUP.
WARNING
WARNING
WARNING
WARNING
WARNING

Keysight N8900 Rack System Installation Guide 5
Contents
Legal Notices................................................................................................................. 3
Safety Notices................................................................................................................ 4
Contents ........................................................................................................................ 5
1 - Introduction.............................................................................................................. 7
Rack Models ..................................................................................... 8
Rack Characteristics.........................................................................8
Common Characteristics................................................................11
2 - Site Preparation ..................................................................................................... 13
Site Accessibility............................................................................. 14
Site Requirements..........................................................................15
3 - Unpacking .............................................................................................................. 17
Items Supplied................................................................................18
Unpacking Instructions ..................................................................18
Moving the Rack Cabinet ...............................................................20
4 - Assembly................................................................................................................ 21
Connect the AC Mains ...................................................................22
Install the Power Supplies..............................................................23
Install the Bus Bars ........................................................................24
Connect the AC input.....................................................................27
Connect the Communications Cables ...........................................28
Connect the Output Cables ...........................................................30
Complete the Installation...............................................................31
5 - Operation ............................................................................................................... 33
Switches and Indicators.................................................................34
Turn-On Checkout..........................................................................35
Computer Interfaces.......................................................................37
6 - Maintenance .......................................................................................................... 39
Lock-Out Tag-Out .......................................................................... 40
Before Servicing .............................................................................40
Troubleshooting..............................................................................40
Parts List.........................................................................................41
Wiring Diagrams.............................................................................42
Index ............................................................................................................................ 47

1
Introduction
Rack Models ..................................................................................... 8
Rack Characteristics.........................................................................8
Common Characteristics................................................................11
The Keysight N8900 Series Rack System is shipped without the
Keysight N8900 Series Autoranging DC Power Supplies, which must
be ordered separately. You can install up to six 15-kW N8900 power
supplies in the prewired rack in parallel – then treat the entire rack
as a single-output power system that delivers up to 90 kW.
Autoranging capability provides full power output at a wide range of
voltages and currents.
This document includes installation and operating information for the
Keysight N8900 Series Rack System. For feedback on this document,
please contact Keysight at www.keysight.com/find/n8900-
docfeedback.
NOTE
You can contact Keysight
Technologies at one of the following telephone
numbers for warranty, service, or technical support information.
In the United States: [phone]
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 this manual. Go to
www.keysight.com/find/n8900 to get the latest version of the manual.

1 Introduction
8 Keysight N8900 Rack System Installation Guide
Rack Models
Rack Models
AC Input
Supported Models
Maximum Voltage
Maximum Current
(with 6 units)
Keysight N89201A 208 VAC
3 phase
Up to 6 - N8931A
Up to 6 - N8932A
80 V
200 V
3060 A
1260 A
Keysight N89202A 208 VAC
3 phase
Up to 6 - N8934A
Up to 6 - N8935A
Up to 6 - N8937A
500 V
750 V
1,500 V
540 A
360 A
180 A
Keysight N89401A 400 VAC
3 phase
Up to 6 - N8951A
Up to 6 - N8952A
80 V
200 V
3060 A
1260 A
Keysight N89402A 400 VAC
3 phase
Up to 6 - N8954A
Up to 6 - N8955A
Up to 6 - N8957A
500 V
750 V
1,500 V
540 A
360 A
180 A
Rack Characteristics
Characteristics are not warranted but are descriptions of
performance determined either by design or by type testing. All
characteristics are typical unless otherwise noted.
This information is subject to change without notice.
Characteristics
Number of Units in Parallel
N8931A/N8951A
2
3
4
5
6
Output ripple & noise
CV peak-to-peak:
640 mV
Load Effect
Voltage:
Current:
40 mV
1.53 A
40 mV
2.30 A
40 mV
3.06 A
40 mV
3.83 A
40 mV
4.60 A
Current programming &
measurement accuracy:
≤ 2.2 A
≤ 3.3 A
≤ 4.4 A
≤ 5.5 A
≤ 6.6 A
Voltage programming &
measurement accuracy:
≤ 80 mV
Transient response
Recovery Time:
Settling band:
≤ 3 ms
0.80 V
Output response time
Up, full load:
Down, full load:
Down, no load:
≤ 30 ms
≤ 80 ms
≤ 30 s

Introduction 1
Keysight N8900 Rack System Installation Guide 9
Characteristics
Number of Units in Parallel
N8932A/N8952A
2
3
4
5
6
Output ripple & noise
CV peak-to-peak:
740/600 mV
Load Effect
Voltage:
Current:
100 mV
0.063 A
100 mV
0.945 A
100 mV
1.26 A
100 mV
1.58 A
100 mV
1.89 A
Current programming &
measurement accuracy:
≤ 0.840 A
≤ 1.26 A
≤ 1.68 A
≤ 2.1 A
≤ 2.52 A
Voltage programming &
measurement accuracy:
≤ 200 mV
Transient response
Recovery Time:
Settling band:
≤ 3 ms
2.0 V
Output response time
Up, full load:
Down, full load:
Down, no load:
≤ 30 ms
≤ 80 ms
≤ 10 s
Characteristics
Number of Units in Parallel
N8934A/N8954A
2
3
4
5
6
Output ripple & noise
CV peak-to-peak:
700 mV
Load Effect
Voltage:
Current:
250 mV
270 mA
250 mV
405 mA
250 mV
540 mA
250 mV
675 mA
250 mV
810 mA
Current programming &
measurement accuracy:
≤ 0.36 A
≤ 0.54 A
≤ 0.72 A
≤ 0.90 A
≤ 1.08 A
Voltage programming &
measurement accuracy:
≤ 500 mV
Transient response
Recovery Time:
Settling band:
≤ 3 ms
5.0 V
Output response time
Up, full load:
Down, full load:
Down, no load:
≤ 30 ms
≤ 80 ms
≤ 10 s

1 Introduction
10 Keysight N8900 Rack System Installation Guide
Characteristics
Number of Units in Parallel
N8935A/N8955A
2
3
4
5
6
Output ripple & noise
CV peak-to-peak:
1.6 V
Load Effect
Voltage:
Current:
375 mV
190 mA
375 mV
270 mA
375 mV
360 mA
375 mV
450 mA
375 mV
540 mA
Current programming &
measurement accuracy:
≤ 240 mA
≤ 360 mA
≤ 480 mA
≤ 600 mA
≤ 720 mA
Voltage programming &
measurement accuracy:
≤750 mV
Transient response
Recovery Time:
Settling band:
≤ 3 ms
7.5 V
Output response time
Up, full load:
Down, full load:
Down, no load:
≤ 30 ms
≤ 80 ms
≤ 10 s
Characteristics
Number of Units in Parallel
N8937A/N8957A
2
3
4
5
6
Output ripple & noise
CV peak-to-peak:
4.8 V
Load Effect
Voltage:
Current:
750 mV
106/90 mA
750 mV
159/135 mA
750 mV
212/180 mA
750 mV
265/225 mA
750 mV
318/270 mA
Current programming &
measurement accuracy:
≤ 120 mA
≤ 180 mA
≤ 240 mA
≤ 300 mA
≤ 360 mA
Voltage programming &
measurement accuracy:
≤ 1.5 V
Transient response
Recovery Time:
Settling band:
≤ 3 ms
15 V
Output response time
Up, full load:
Down, full load:
Down, no load:
≤ 30 ms
≤ 80 ms
≤ 10 s

Introduction 1
Keysight N8900 Rack System Installation Guide 11
Common Characteristics
Characteristics
All Models
Computer Interfaces
LXI Core 201:
USB:
GPIB:
Language:
10/100 Base-T Ethernet (Sockets, VXI-11 protocol, Web user interface)
USB 2.0 (USB-TMC488)
GPIB IEEE 488
SCPI - 1993, IEEE 488.2 compliant
Environmental Conditions
Operating environment:
Temperature range:
Relative humidity:
Altitude:
Indoor use, installation category II (for AC input), pollution degree 2
0°C to 45°C
80% or less (non-condensing)
Up to 2000 meters
Regulatory Compliance
EMC:
Safety:
European EMC Directive for test and measurement products
Australian standard and carries C-Tick mark
European Low Voltage Directive and carries the CE marking
Weight
N89201A:
N89202A:
N89401A:
N89402A:
348 lbs (158.2 kg) empty; estimated at 738 lbs (336 kg) fully loaded
298 lbs (135.5 kg) empty; estimated at 688 lbs (313 kg) fully loaded
320 lbs (145.5 kg) empty; estimated at 670 lbs (306 kg) fully loaded
270 lbs (122.7 kg) empty; estimated at 620 lbs (283 kg) fully loaded
Dimensions
All Models: 600 mm x 1,060 mm x 1,540 mm
Depth includes front and rear handles
Height includes casters and emergency stop switch.

2
Site Preparation
Site Accessibility............................................................................. 14
Site Requirements.......................................................................... 15

2 Site Preparation
14 Keysight N8900 Rack System Installation Guide
Site Accessibility
Customer’s Responsibility
It is the customer's responsibility to:
1. Prepare the installation site in accordance with the instructions in
this guide (see Site Requirements).
2. Move all of the equipment from the receiving area to the
installation site.
3. Move any other equipment and furniture that will be used with the
test system to the installation site.
To determine the accessibility of your installation site, you must
consider the physical characteristics of the test system and whether
the route from the receiving area to the installation site will
accommodate the system.
The equipment listed in the following table, or the equivalent to this
equipment, is required for the performance tests and for calibration.
Test record sheets are included at the back of this section.
Installation Route
Inspect all doorways, corridors, and rooms enroute to the installation
site. Make sure that there is enough clearance for the height of the
cabinet along the entire route. Also make sure that there is enough
clearance for the cabinet to go around all corners.
The floor under the cabinet along the installation route and at the
installation site must be capable of supporting a concentrated load
of approximately 250 pounds-force per square inch (18 kilograms-
force per square centimeter) for a fully loaded rack system.
Any horizontal gaps in the floor (such as between the floor and an
elevator) cannot exceed 2.5 cm (1in.). Any vertical obstructions that
are at a right angle to the floor (such as the lip of an elevator
threshold) cannot exceed 1 cm (0.4 in.) in height.
WARNING
The maximum recommended angle of any ramp on which the cabinet
will be moved is 10 degrees and cannot exceed 15 degrees.

Site Preparation 2
Keysight N8900 Rack System Installation Guide 15
Site Requirements
Floor Loading
Observe floor loading requirements (especially raised floors) and
ensure adequate space before moving your rack system, and all
safety items while moving.
At the maximum gross weight for a fully loaded rack system, the
floor must be able to support 250 pounds-force per square inch
(18 kilograms-force per square centimeter).
WARNING
It is the customer's responsibility to determine the floor loading capacity
at the installation site, and for the entire route when moving. Failure to
do so could result in personal injury and/or equipment damage.
Because the weight is concentrated on the four casters, Keysight
Technologies recommends removing the components and moving
them separately when moving a rack system over a floor (especially a
raised floor) of unknown capacity.
Floor Space
The dimensions of your rack system, an outline diagram, and airflow
direction are shown below. Fans cool the instruments by drawing air
through the front and exhausting it out the back. Allow at least 1
meter (36 inches) of space at the front and back of the cabinet for
adequate air circulation.
NOTE
KeysIght N8900 Series Rack Systems generate up to 90 kW of power,
which is consumed by the DUT. Ensure that there is enough air
circulation or air conditioning at the installation site to remove any
excess heat generated by the DUT. By itself, a fully loaded rack system
generates up to 9 kW of heat.
Approximately one to two square meters (one to two square yards) of
space are recommended in front and behind the cabinet for
accessibility and servicing. Since there may be occasions when
several people may be gathered in front of the rack system,
additional space may be considered.

2 Site Preparation
16 Keysight N8900 Rack System Installation Guide
Power Requirements
This section indicates the electrical requirements of your rack system.
NOTE
It is assumed that you have conducted tests to determine that the
voltage fluctuations throughout the day are within the range indicated
for your rack system. If there is greater voltage fluctuation than what is
indicated in the table, provisions must be made for voltage regulation.
Requirements
for US
Requirements
for Europe
Requirements
for Asia
Nominal Rating:
208 VAC line-to-line
400 VAC line-to-line
208 VAC line-to-line
Input Range:
± 10% of nominal
± 10% of nominal
± 10% of nominal
Phase:
3 phase
3 phase
3 phase
Input Current (with 6 units):
336 A
168 A
336 A
kW per Phase (with 6 units):
33.6 kW
33.6 kW
33.6 kW
Frequency Range:
45-65 Hz
45-65 Hz
45-65 Hz
Maximum Short-circuit Current:
10 kA
10 kA
10 kA
External System Disconnect
WARNING
Although the rack system has an emergency stop switch at the top, door
interlock switches on the back door, and individual circuit breakers on
the front, these switches do not completely disconnect the AC mains
from all components and connections inside the rack. AC voltage is still
present at the main terminal block, the line side of K1 (K2), circuit
breaker F7, and the auxiliary power supply.
It is the customer's responsibility to provide an adequate
disconnecting means in accordance to clause 5.3.2 (NFPA79 or EN
60204-1) at the final installation location in order to de-energize the
entire rack system completely. The following requirements apply:
•An additional disconnect method, either a disconnect switch or
circuit breaker, must be provided to completely disconnect the
AC mains from the cabinet. The AC mains cables must be
connected to this external system disconnect device.
•Additionally, customers must also provide an overcurrent
protection device.
•A licensed electrician must select and install this disconnect
device and protection device in accordance all applicable local
electrical codes and the ratings nameplate on the cabinet.
•The cabinet must be labeled to indicate the location of the
external disconnect device. The disconnect device must also be
labeled to indicate the cabinet that it supplies.

3
Unpacking
Items Supplied................................................................................18
Unpacking Instructions ..................................................................18
Moving the Rack Cabinet ...............................................................20
When you receive your N8900 Series Rack System, 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
Support Office immediately. Refer to www.keysight.com/find/assist.
Check the Items Supplied list and verify that you have received these
items with your unit. If anything is missing, please contact your
nearest Keysight Sales and Support Office.
NOTE
The power supplies for the N8900 Rack System are shipped separately.

3 Unpacking
18 Keysight N8900 Rack System Installation Guide
Items Supplied
After you have unpacked the rack system, check that you have
received the following items. These should be packed inside the
cabinet.
Item
Description
Part Number
Installation
Guide
This document 5991-3411
Other
Documentation
Functional test certificate
China RoHS addendum
Safety information booklet
Rack packing List
Hardware kit -
High voltage
12 front-panel screws*
12 front washers*
5 – CAT5 patch cables
5067-6071
Hardware kit -
High current
12 front-panel screws*
12 front washers*
18 M8x30 mm screws
18 M8x40 mm screws
36 spring washers
36 M8 nuts
72 flat washers
5 – CAT5 patch cables
5067-6070
*There are enough front panel screws and washers for three power
supplies. If you are installing more than three supplies, use the front
panel screws and washers that are installed in the blank front panels.

Unpacking 3
Keysight N8900 Rack System Installation Guide 19
Unpacking Instructions
WARNING
Wear safety goggles and gloves when unpacking the rack system.
Complete unpacking instructions are provided in a separate
document that is attached to the shipping crate. Briefly, unpacking
involves the following steps:
1. Use the appropriate tools to disassemble the shipping crate.
2. Remove the top cover and side panels from the pallet.
3. Remove the ramp and the blocking to which the ramp is
attached.
4. Cut the strapping.
5. Slide the ramp under the pallet.
6. Carefully roll the cabinet down from off the pallet.

3 Unpacking
20 Keysight N8900 Rack System Installation Guide
Moving the Rack Cabinet
The rack system includes casters that pivot so that the cabinet can
easily be maneuvered into position.
Make sure that the two casters located at the front of the cabinet are
unlocked.
WARNING
When moving the cabinet, move slowly and use extreme care to prevent
the casters jamming on debris, in seams, or in cracks in the floor
surface. The cabinet's high center of gravity could cause it to tip if a
caster jammed.
Once the cabinet is placed in its final location, lock the front casters
by stepping on the locking tab. This will prevent the cabinet from
moving.