Keysight U2751A User's And Service Manual
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Keysight U2751A User's And Service Manual

Keysight U2751A User's And Service Manual

Usb modular switch matrix
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Keysight U2751A USB
Modular Switch Matrix
User's and
Service Guide

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Summary of Contents for Keysight U2751A

  • Page 1 Keysight U2751A USB Modular Switch Matrix User’s and Service Guide...
  • Page 4 FAR 27.401 or DFAR 227.7103-5 (c), as applicable in any Do not proceed beyond a WARNING technical data. notice until the indicated conditions are fully understood and met. Keysight U2751A User’s and Service Guide...

  • Page 5: Safety Symbols

    Out position of a bi-stable push control Frame or chassis terminal In position of a bi-stable push control Measurements performed on circuits Equipotentiality CAT I not directly connected to MAINS Equipment protected throughout by double insulation or reinforced insulation Keysight U2751A User’s and Service Guide...

  • Page 6: General Safety Information

    – Do not permit any blockage of the ventilation holes of the device. – The instrument is designed for use in Overvoltage Category II and Pollution Degree 2. Keysight U2751A User’s and Service Guide...

  • Page 7: Environmental Conditions

    Storage temperature –20 °C to 70 °C Storage humidity 5% to 90% RH non-condensing Altitude up to 2000 m The U2751A USB Modular Switch Matrix complies with the following safety CAUTION and EMC requirements. – IEC 61010-1/EN61010-1 – IEC61010-2-030/EN61010-2-030 – Canada: –...

  • Page 8: Regulatory Markings

    Cet appareil ISM est conforme a la this electrical/electronic product in norme NMB-001 du Canada. domestic household waste. The CSA mark is a registered trademark of the Canadian Standards Association. Keysight U2751A User’s and Service Guide...

  • Page 9: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec

    To return this unwanted instrument, contact your nearest Keysight Service Center, or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml for more information. Sales and Technical Support To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – www.keysight.com/find/U2751A (product-specific information and support, software and documentation updates) –...
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  • Page 11: Table Of Contents

    ........33 Keysight U2751A User’s and Service Guide...
  • Page 12 ........50 Contacting Keysight Technologies ......50 Index Keysight U2751A User’s and Service Guide...
  • Page 13 Switch matrix concept ......37 Figure 2-2 Panel view of the Keysight Measurement Manager . .38 Figure 2-3 Panel view of the relay cycle counter .
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  • Page 15 ......32 Table 4-1 Part number and description of replaceable part ..47 Keysight U2751A User’s and Service Guide...
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  • Page 17 Keysight U2751A USB Modular Switch Matrix User’s and Service Guide Getting Started Introduction Product at a Glance Product Dimensions Standard Shipped Items Inspection and Maintenance Installation and Configuration...

  • Page 18: Getting Started

    Getting 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 Keysight Measurement Manager software.

  • Page 19: Product At A Glance

    Getting Started Product at a Glance Product Outlook Top View Bumpers Keysight U2751A User’s and Service Guide...
  • Page 20 Getting Started Front View USB indicator Power indicator DSub connector Rear View 55-pin backplane connector USB inlet Fastening hole for USB cable with locking mechanism Power inlet Keysight U2751A User’s and Service Guide...

  • Page 21: Product Dimensions

    Getting Started Product Dimensions Dimensions Without Bumpers Top View 105.00 mm 175.00 mm Front View 25.00 mm Keysight U2751A User’s and Service Guide...

  • Page 22: Dimensions With Bumpers

    Getting Started Dimensions With Bumpers Top View 117.00 mm 180.00 mm Front View 41.00 mm Keysight U2751A User’s and Service Guide...

  • Page 23: Standard Shipped Items

    Getting Started Standard Shipped Items Verify that you have received the following items with your unit. If anything is missing or damaged, please contact the nearest Keysight Sales Office. ✔ 12 V, 2 A AC/DC adapter ✔ Power cord ✔ USB Standard-A to Mini-B interface cable ✔...

  • Page 24: Inspection And Maintenance

    The front of this manual contains the warranty information. Keep the original packaging in case the U2751A has to be returned to Keysight in the future. If you return the U2751A for service, attach a tag identifying the owner and model number.

  • Page 25: Installation And Configuration

    Follow the step-by-step instructions shown in the Keysight USB Modular Products and Systems Quick Start Guide to get started with the preparations and installation of your U2751A. You need to install the IVI-COM driver if you are going to use the U2751A with NOTE ®...

  • Page 26: U2751A Dsub Connector

    Getting Started U2751A DSub Connector The U2751A is equipped with one 25-pin male DSub connector as shown in Figure 1-1. Figure 1-1 25-pin male DSub connector Pin Assignments Table 1-1 Pin assignments Description Description R represents “Row” and C represents “Column”.

  • Page 27: U2922A Terminal Block

    Getting Started U2922A Terminal Block The U2922A terminal block is an optional accessory to be used with the U2751A. The U2922A which weighs approximately 100 g and has screw-type terminals, offers you a convenient and simple way of making connection to the switch matrix for prototyping applications or an actual system deployment.
  • Page 28 Getting Started The outlook and dimensions of the U2922A are shown in Figure 1-3 Figure 1-4. Female DSub connector Jack screw Retractable cover Terminal block Figure 1-3 U2922A outlook Keysight U2751A User’s and Service Guide...
  • Page 29 Getting Started Rear View 85.00 mm 23.00 mm Top View 90.00 mm 105.00 mm Front View Side View 85.00 mm 105.00 mm 23.00 mm 23.00 mm Figure 1-4 U2922A dimensions Keysight U2751A User’s and Service Guide...

  • Page 30: U2922A Terminal Block Installation

    U2922A Terminal Block Installation This section provides the recommended procedure for connecting the U2922A terminal block to the U2751A. – The maximum working voltage of the U2751A with the terminal WARNING block for standalone is 35 Vrms and for modular (when used with the U2781A) is 180 Vrms.
  • Page 31 U2751A as shown. Tighten the jack screws using a screw driver to secure the connection. Ensure that the terminal block is installed correctly with the screws properly tighten for secure operation. Jack screws of the U2922A Keysight U2751A User’s and Service Guide...

  • Page 32: 55-Pin Backplane Connector Pin Configuration

    Getting Started 55-Pin Backplane Connector Pin Configuration The 55-pin backplane connector is used when the U2751A module is inserted into the U2781A USB modular instrument chassis. For more details, refer to the Keysight U2781A USB Modular Instrument Chassis User's Guide.

  • Page 33: Chassis Installation

    Getting Started Chassis Installation The L-Mount kit is to be installed to your U2751A module. The following instructions describe the simple procedure of installing the L-Mount kit and your module in the U2781A chassis. 1 Unpack the L-Mount kit from its packaging.
  • Page 34 Getting Started THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U2751A User’s and Service Guide...
  • Page 35 Keysight U2751A USB Modular Switch Matrix User’s and Service Guide Operation and Features Power Up Switch Control Relay Cycle Counter System-Related Operation This chapter describes the features and operation of the U2751A.

  • Page 36: Operation And Features

    IO Libraries Suite 14.2 or higher. Both of these are included when you purchase the U2751A. Refer to the Keysight USB Modular Products and Systems Quick Start Guide for the installation procedure. – On the front panel of the U2751A, there are two LED indicators. Refer to Chapter “Product Outlook”...

  • Page 37: Switch Control

    A matrix switch connects multiple inputs to multiple outputs. A matrix is arranged in rows and columns. For example, the U2751A is a 4×8 matrix that can be used to connect four sources to eight test points as shown in Figure 2-1.
  • Page 38 Panel view of the Keysight Measurement Manager Keysight Measurement Manager Operation Launch the Keysight Measurement Manager software and select the Matrix tab. The keyboard shortcut key is Ctrl+M. Connect the instruments and devices as per your application. Key in the names of the instruments and devices in the available text boxes.
  • Page 39 // Opens the relay at row 3, column 2. -> ROUTe:OPEN (@302) Example 3, Make contact at channel 101, 302 // Closes relays at row 1, column 1 and -> ROUTe:CLOSe (@101,302) row 3, column 2. Keysight U2751A User’s and Service Guide...

  • Page 40: Relay Cycle Counter

    This feature allows the user to carry out preventive maintenance, which is to replace those relays that are at the end of their life span. Relay cycles that are above a certain limit will be highlighted in red. Refer to the example in Figure 2-3. Keysight U2751A User’s and Service Guide...

  • Page 41: System-Related Operation

    Ensure that the switch terminals are not connected to any instrument. Turn on the U2751A. On the application panel, select Tools > Sel f-Test. This will perform a series of communication tests on the module, which take a couple of seconds to complete.

  • Page 42: Scpi Commands For System-Related Tasks

    // Returns a +0 if the test pass else it <- +0 will return a +1 if it fails. // Returns the error number and its -> SYST:ERR? corresponding message string from the error queue. <- +0, "No Error" Keysight U2751A User’s and Service Guide...

  • Page 43: Characteristics And Specifications

    Keysight U2751A USB Modular Switch Matrix User’s and Service Guide Characteristics and Specifications For the characteristics and specifications of the U2751A USB Modular Switch Matrix, refer to the datasheet at http://literature.cdn.keysight.com/litweb/pdf/5991-0187EN.pdf.
  • Page 44 Characteristics and Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U2751A User’s and Service Guide...
  • Page 45 Keysight U2751A USB Modular Switch Matrix User’s and Service Guide Service Information Checking Defective Relay(s) Replaceable Parts This chapter provides guidelines for returning your instrument to Keysight for service or repair, and for servicing it yourself. A list of replaceable parts is also provided.

  • Page 46: Service Information

    Checking Defective Relay(s) It is recommended to have the relay(s) checked when it reaches 10 million cycle NOTE counts. The relay cycle count can be obtained by using the Keysight Measurement Manager or sending the following SCPI command: DIAGnostic:RELay:CYCLes? (@<ch_list>) To check for any defective relay, the equipment required is a digital multimeter with continuity feature.

  • Page 47: Replaceable Parts

    This section contains the information for ordering replacement parts for your instrument. To order the parts, please do the following. – Contact your nearest Keysight Sales Office or Service Center. – Provide the part number for the relay. – Provide the instrument model and serial number.

  • Page 48: Disassembly Instructions

    Service Information Disassembly Instructions Remove the screws and nuts as shown. Take the measurement board and carrier board out from the module. Remove the screws as indicated. Keysight U2751A User’s and Service Guide...
  • Page 49 Turn to the opposite side of the measurement board and ensure that only the defective relays are desoldered. Upon replacing the relay(s), reset the relay cycle count to zero by issuing the following SCPI command: DIAGnostic:RELay:CYCLes:CLEar (@<ch_list>) Keysight U2751A User’s and Service Guide...

  • Page 50: Reassembly Instructions

    Contacting Keysight Technologies Types of Service Available If your instrument fails during the warranty period, Keysight will replace the unit for free. The replacement units will be shipped with new calibration certificates. Every replacement unit has its own serial number. The serial number of the NOTE defective unit does not transfer to the replacement unit.
  • Page 51 8, 18, 23, 37, relay cycle counter, maintenance, general, relays, replacing measurement board, electrical check, DIAGnostic:RELay:CLEar ® Microsoft Internet Explorer. See electrostatic discharge. See (@<ch_list>), browser precautions disassembly, modular instrument chassis, error conditions ESD precautions, Keysight U2751A User’s and Service Guide...
  • Page 52 SCPI Commands, switch matrix concept, switching, system-related operation, *TST, terminal block, U2922A. See U2922A test, automated, U2922A dimensions, female DSub connector, installation, outlook, pin configuration, terminal block, USB extension cable, USB indicator, USB interface, VBUS, Keysight U2751A User’s and Service Guide...
  • Page 53 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2008-2020 Edition 8, June 12, 2020 Printed in Malaysia  U2751-90011 www.keysight.com...

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