Keysight U2751A USB Modular Switch Matrix User’s and Service Guide
Notices Copyright Notice © Keysight Technologies 2008-2017 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 as governed by United States and international copyright laws. Trademarks Pentium is a U.S. registered trademark of Intel Corporation.
Safety Symbols The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument.
General Safety Information WARNING – 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).
Environmental Conditions 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. CAUTION Environmental cond itions 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.
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. The RCM mark is a registered trademark of the Australian Communications and Media Authority. ICES/NMB-001 indicates that this ISM device complies with the Canadian ICES-001. Cet appareil ISM est conforme a la norme NMB-001 du Canada. This instrument complies with the WEEE Directive (2002/96/EC) marking requirement.
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 or 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.
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Table of Contents Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 General Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC . . . . . . .
2 Operation and Features Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Switch Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Relay Cycle Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 System-Related Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Figures Figure 1-1 Figure 1-2 Figure 1-3 Figure 1-4 Figure 1-5 Figure 2-1 Figure 2-2 Figure 2-3 Figure 4-1 25-pin male DSub connector . . . . . . . . . . . . . . . . . . . .26 U2922A pin configuration . . . . . . . . . . . . . . . . . . . . . .27 U2922A outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 U2922A dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .29 55-pin backplane connector pin configuration . . . . . .32 Switch matrix concept . . . . . . . . . . . .
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List of Tables Table 1-1 Table 1-2 Table 4-1 Pin assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Synchronous Simultaneous Interface (SSI) connector pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 Part number and description of replaceable part . . . .
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Keysight U2751A USB Modular Switch Matrix User’s and Service Guide 1 Getting Started Introduction 18 Product at a Glance 19 Product Dimensions 21 Standard Shipped Items 23 Inspection and Maintenance 24 Installation and Configuration 25 17
1 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. The U2751A can also be programmed using the provided drivers or via SCPI commands.
Getting Started 1 Product at a Glance Product Outlook Top View Bumpers Keysight U2751A User’s and Service Guide 19
1 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 20 Keysight U2751A User’s and Service Guide
Getting Started 1 Product Dimensions Dimensions Without Bumpers Top View 105.00 mm 175.00 mm Front View 25.
1 Getting Started Dimensions With Bumpers Top View 117.00 mm 180.00 mm Front View 41.
Getting Started 1 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.
1 Getting Started Inspection and Maintenance Initial Inspection When you receive your U2751A, inspect the unit for any obvious damage such as broken terminals or cracks, dents, and scratches on the casing that may occur during shipment. If any damage is found, notify the nearest Keysight Sales Office immediately. 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.
Getting Started 1 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. NOTE You need to install the IVI-COM driver if you are going to use the U2751A with Keysight VEE Pro, LabVIEW, or Microsoft® Visual Studio®.
1 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 Pin Description Pin Description 18 R1H 10 C3H 19 R1L 11 C3L 20 R2H 8 C4H 21 R2L 9 C4L 16 R3H 5 C5H 17 R3L 6 C5L 22 R4H 3 C6H 23 R4L 4 C6L 24 C1H 1 C7H 25 C1L 2 C7L 12 C2H 14 C8H 13 C2L 15 C8L 7 GND R represents “Row” and C represents “Column”.
Getting Started 1 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. It allows the user to configure a wide variety of routing options and matrix topologies.
1 Getting Started The outlook and dimensions of the U2922A are shown in Figure 1-3 and Figure 1-4.
Getting Started 1 Rear View 85.00 mm 23.00 mm Top View 90.00 mm Front View 105.00 mm Side View 85.00 mm 105.00 mm 23.00 mm Figure 1-4 23.
1 Getting Started U2922A Terminal Block Installation This section provides the recommended procedure for connecting the U2922A terminal block to the U2751A. WARNING – The maximum working voltage of the U2751A with the terminal block for standalone is 35 Vrms and for modular (when used with the U2781A) is 180 Vrms. – The maximum transient voltage is 300 Vrms. – Do not remove the retractable cover from the U2922A terminal block during operation to avoid any unexpected hazard.
Getting Started 1 Snap-fit clasp of the retractable cover and the housing Close your terminal block by slotting in the retractable cover. Check the snap-fit clasp on the cover and the housing to ensure correct orientation of the retractable cover before slotting it in. Turn over the U2922A with the retractable cover facing downwards. Then, insert the U2922A to the U2751A as shown. Tighten the jack screws using a screw driver to secure the connection.
1 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.
Getting Started 1 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. 2 Remove your U2751A module from the bumper casing. 3 Using a Phillips screwdriver, fasten the L-Mount kit to your U2751A module.
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Keysight U2751A USB Modular Switch Matrix User’s and Service Guide 2 Operation and Features Power Up 36 Switch Control 37 Relay Cycle Counter 40 System-Related Operation 41 This chapter describes the features and operation of the U2751A.
2 Operation and Features Power Up Take note of the following when you power up the U2751A. – The U2751A can only be operated via the USB interface. – Before you can control the U2751A, you need to install the hardware driver and the 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.
Operation and Features 2 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. Any column can be connected to any row by activating the corresponding relay that connects the column to the row as shown in Figure 2-1. Each cross-point relay on this module has its own unique channel label representing the row and column.
2 Operation and Features Figure 2-2 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. Click the cross-point circles on the software to toggle the contact on or off.
Operation and Features 2 SCPI Commands The following examples show the SCPI commands for executing the closing and opening of the relays. Example 1, Make contact at channel 302 -> *CLS; *RST // Resets the switch to the default power-on state. This command can be ignored if this operation is not required. -> ROUTe:CLOSe (@302) // Closes the relay at row 3, column 2. Example 2, Break contact at channel 302 -> ROUTe:OPEN (@302) // Opens the relay at row 3, column 2.
2 Operation and Features Relay Cycle Counter Figure 2-3 Panel view of the relay cycle counter Keysight Measurement Manager Operation At the main panel, select the Relay Cycle Counter tab. The panel in Figure 2-3 will be displayed. The keyboard shortcut key is Ctrl+R. 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.
Operation and Features 2 System-Related Operation This section provides information on system-related topics such as executing a self-test, performing self-calibration routine, and reading error conditions. NOTE Do not connect any terminal block or cables prior to performing self-test process. Self-Test To perform the self-test, proceed as follows. Keysight Measurement Manager Operation Ensure that the switch terminals are not connected to any instrument. Turn on the U2751A.
2 Operation and Features SCPI Commands for System-Related Tasks The following examples show the SCPI commands for performing certain system-related tasks. Example 4, Performing system-related tasks -> *CLS; *RST // Resets the switch to the default power-on state. This command can be ignored if this operation is not required. -> *TST? // Executes the self-test. <- +0 // Returns a +0 if the test pass else it will return a +1 if it fails.
Keysight U2751A USB Modular Switch Matrix User’s and Service Guide 3 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.
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Keysight U2751A USB Modular Switch Matrix User’s and Service Guide 4 Service Information Checking Defective Relay(s) Replaceable Parts 47 46 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.
4 Service Information Checking Defective Relay(s) NOTE It is recommended to have the relay(s) checked when it reaches 10 million cycle counts. The relay cycle count can be obtained by using the Keysight Measurement Manager or sending the following SCPI command: DIAGnostic:RELay:CYCLes? (@) To check for any defective relay, the equipment required is a digital multimeter with continuity feature. 1 Close the particular relay(s). For example: The relay located at Row x Column y.
Service Information 4 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. The part number of the replaceable part and its description are shown in the table below.
4 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.
Service Information 4 Separate the carrier and measurement board. There are 32 relays as shown. Turn to the opposite side of the measurement board and ensure that only the defective relays are desoldered.
4 Service Information Reassembly Instructions The reassembly process is simply the reverse of disassembly. 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. NOTE Every replacement unit has its own serial number. The serial number of the defective unit does not transfer to the replacement unit.
Index # 55-pin backplane connector pin, 32 B bumper, 24 bumper casing, 24, 33 C *CLS, 39, 42 carrier board, 48, 49 Certificate of Calibration, 23 channel label, 37 channels, multiple chassis configuration, 18 installation, 33 cleaning, general, 24 column, 18, 26, 37, 38, 39, 46 configuration, instrument connector, 26 pin assignments, 26 55-pin backplane connector pin, 32 cross-point, 18 D defective relays, check, 46 DIAGnostic:RELay:CYCLes? (@), 49 device under test. See DUT disassembly.
W reassembly, 50 replaceable parts. See parts, replaceable row, 18, 26, 37, 38, 39, 46 S SCPI commands, 18, 39, 42 self-calibration, 41 self-test, 41, 42 service Keysight unit exchange, 50 types of service available, 50 SSI connector pin, 32 SSI timing signal, 32 STAR_TRIG, 32 switch control Keysight Manager Measurement operation, 38 introduction, 37 SCPI Commands, 39 switch matrix concept, 37 switching, 18, 37 system-related operation, 41 warranty, 50 Windows® 2000 Professional.
This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2008-2017 Edition 7, June 1, 2017 Printed in Malaysia *U2751-90011* U2751-90011 www.keysight.