Agilent Technologies U2751A User Manual
Agilent U2751A USB
Modular Switch Matrix
User’s and Service Guide
Agilent Technologies
Notices
CAUTION
WARNING
® Agilent Technologies, Inc., 2008–2013
No p art o f this manu al may be re produce d 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 Agilent
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
U2751-90011
Edition
Fourth Edition, June 7, 2013
Agilent Technologies, Inc.
5301 Stevens Creek Blvd.
Santa Clara, CA 95051 USA
Trademark Acknowledgements
Pentium is a U.S. registered trademark of
Intel Corporation.
Microsoft, Visual Studio, Windows, and MS
Windows are trademarks of Microsoft Corporation in the United States and/or other
countries.
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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, Agilent 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. Agilent 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
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written agreement with warranty
terms covering the material in this
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Commercial Computer Software or Computer Software Documentation).
Safety Notices
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.
II U2751A User’s and Service Guide
Safety Symbols
Direct current (DC) Off (supply)
Alternating current (AC) On (supply)
Both direct and alternating current Caution, risk of electric shock
Three-phase alternating current Caution, risk of danger (refer to this
Earth (ground) terminal Caution, hot surface
The following symbols on the instrument and in the documentation
indicate precautions which must be taken to maintain safe operation of
the instrument.
manual for specific Warning or Caution
information)
Protective conductor terminal Out position of a bi-stable push control
Frame or chassis terminal In position of a bi-stable push control
Equipotentiality
Equipment protected throughout by
double insulation or reinforced
insulation
CAT I
Measurements performed on circuits
not directly connected to MAINS
U2751A User’s and Service Guide III
General Safety Information
WARNING
CAUTION
• Do not operate the device around explosive gas, vapor, or dust.
• Observe all markings on the device before establishing any
connection.
• The device is under CAT I measurement category, do not connect the
25-pin connector to MAINS.
CAT I:
Maximum working voltage:
Standalone 35 Vrms
Modular (Used with U2781A) 180 Vrms
Maximum transient voltage: 300 Vrms
• Do not measure higher than the rated voltage (as marked on the
device).
• Do not operate the device with the cover removed or loosened.
• Use only the power adapter provided by the manufacturer to avoid
any unexpected hazards.
IV U2751A User’s and Service Guide
• Electrostatic discharge (ESD) can cause damage to the components in
the instrument and accessories. The cables or wires should be
connected to the plug-in connectors first and covered with the wire
casing prior to plugging it into the output connector to prevent ESD
from occurring.
• If the device is used in a manner not specified by the manufacturer, the
device protection may be impaired.
• Always use dry cloth to clean the device. Do not use ethyl alcohol or
any other volatile liquid to clean the device.
• Do not permit any blockage of the ventilation holes of the device.
Environmental Conditions
CAUTION
This instrument is designed for indoor use and in an area with low
condensation. The table below shows the general environmental
requirements for this instrument.
Environmental conditions Requirements
Operating temperature 0 °C to 50 °C
Operating humidity 20% to 85% RH non-condensing
Storage temperature –20 °C to 70 °C
Storage humidity 5% to 90% RH non-condensing
The U2751A USB modular switch matrix complies with the following
safety and EMC requirements.
• IEC 61010-1:2001/EN61010-1:2001 (2nd Edition)
• Canada: CAN/CSA-C22.2 No. 61010-1-04
• USA: ANSI/UL 61010-1:2004
• IEC 61326-2002/EN 61326:1997+A1:1998+A2:2001+A3:2003
• Canada: ICES-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004
U2751A User’s and Service Guide V
Regulatory Markings
The CE mark is a registered trademark
of the European Community. This CE
mark shows that the product complies
with all the relevant European Legal
Directives.
ICES/NMB-001 indicates that this
ISM device complies with the
Canadian ICES-001.
Cet appareil ISM est confomre a la
norme NMB-001 du Canada.
The CSA mark is a registered
trademark of the Canadian Standards
Association.
The C-tick mark is a registered
trademark of the Spectrum
Management Agency of Australia.
This signifies compliance with
the Australia EMC Framework
regulations under the terms of the
Radio Communication Act of 1992.
This instrument complies with the
WEEE Directive (2002/96/EC)
marking requirement. This affixed
product label indicates that you must
not discard this electrical/electronic
product in domestic household waste.
VI U2751A User’s and Service Guide
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label 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
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste
To return this unwanted instrument, contact your nearest Agilent
Technologies, or visit:
www.agilent.com/environment/product
for more information.
U2751A User’s and Service Guide VII
In This Guide…
1Getting Started
This chapter provides an overview of the U2751A USB modular switch
matrix, which includes the product outlook, product dimensions, and
product layout. This chapter also contains instructions on how to install
and configure the U2751A.
2 Operation and Features
This chapter describes the operation and features that are offered by the
U2751A, such as switch controls and relay usage monitoring.
3 Characteristics and Specifications
This chapter contains the characteristics and specifications of the
U2751A.
4Service Information
This chapter provides the guidelines for returning the U2751A to Agilent
Technologies for servicing or for servicing it yourself. It also contains the
list of replaceable parts.
VIII U2751A User’s and Service Guide
U2751A User’s and Service Guide IX
Declaration of Conformity (DoC)
NOTE
The Declaration of Conformity (DoC) for this instrument is
available on the Web site. You can search the DoC by its
product model or description.
http://regulations.corporate.agilent.com/DoC/search.htm
If you are unable to search for the respective DoC, please contact your
local Agilent representative.
X U2751A User’s and Service Guide
Contents
List of Figures XIII
List of Tables XV
1Getting Started1
Introduction 2
Product at a Glance 3
Product Outlook 3
Product Dimensions 5
Dimensions Without Bumpers 5
Dimensions With Bumpers 6
Standard Shipped Items 7
Inspection and Maintenance 8
Initial Inspection 8
Electrical Check 8
General Maintenance 8
Installation and Configuration 9
U2751A DSub Connector 10
U2922A Terminal Block 11
U2922A Terminal Block Installation 14
55-Pin Backplane Connector Pin Configuration 16
Chassis Installation 17
2 Operation and Features 19
Power Up 20
Switch Control 21
U2751A User’s and Service Guide XI
Contents
Relay Cycle Counter 24
System-Related Operation 25
Self-Test 25
Error Conditions 25
SCPI Commands for System-Related Tasks 26
3 Characteristics and Specifications 27
Product Characteristics 28
Product Specifications 30
4Service Information33
Checking Defective Relay(s) 34
Replaceable Parts 35
Disassembly Instructions 36
Reassembly Instructions 38
Contacting Agilent Technologies 38
XII U2751A User’s and Service Guide
List of Figures
Figure 1-1. 25-pin male DSub connector 10
Figure 1-2. U2922A pin configuration 11
Figure 1-3. U2922A outlook 12
Figure 1-4. U2922A dimensions 13
Figure 1-5. 55-pin backplane connector pin configuration 16
Figure 2-1. Switch matrix concept 21
Figure 2-2. Panel view of the Agilent Measurement Manager 22
Figure 2-3. Panel view of the relay cycle counter 24
Figure 4-4. Defective relay(s) check 34
U2751A User’s and Service Guide XIII
XIV U2751A User’s and Service Guide
List of Tables
Table 1-1. Pin assignments 10
Table 1-2. Synchronous Simultaneous Interface (SSI) connector pin
description 16
Table 3-3. Electrical and mechanical specifications update per
attached data sheet 30
Table 3-1. Electrical and mechanical specifications update per
attached data sheet (continued) 31
Table 4-2. Part number and description of replaceable part 35
U2751A User’s and Service Guide XV
XVI U2751A User’s and Service Guide
U2751A USB Modular Switch Matrix
User’s and Service Guide
1
Getting Started
Introduction 2
Product at a Glance 3
Product Outlook 3
Product Dimensions 5
Dimensions Without Bumpers 5
Dimensions With Bumpers 6
Standard Shipped Items 7
Inspection and Maintenance 8
Initial Inspection 8
Electrical Check 8
General Maintenance 8
Installation and Configuration 9
U2751A DSub Connector 10
U2922A Terminal Block 11
U2922A Terminal Block Installation 14
55-Pin Backplane Connector Pin Configuration 16
Chassis Installation 17
Agilent Technologies
1
1Getting Started
Introduction
The U2751A USB modular switch matrix offers a high
quality, low cost switching solution for automated test. It can
operate as a standalone or modular unit when used with the
U2781A USB modular instrument chassis.
The U2751A is a compact 4×8, two-wire modular switch
matrix which is controlled remotely over a USB interface via
the Agilent Measurement Manager software. The U2751A can
also be programmed using the provided drivers or via SCPI
commands.
The U2751A has the following features.
• 32 two-wire cross-points organized in a 4 rows by 8
columns configuration
• any combination of rows and columns can be connected
at a time. Multiple channels can be closed at the same
time
• relay cycle counter
The U2751A offers you the most flexible connection path
between your device under test (DUT) and your test
equipment, allowing different instruments to be connected to
multiple points on your DUT at the same time.
Using the Agilent Measurement Manager, you can instruct
the matrix to make or break any of the 32 row-column
intersections over the USB interface. More details will be
covered in the Agilent Measurement Manager help file.
2 U2751A User’s and Service Guide
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