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Service Information

U2751A User’s and Service Guide

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 Agilent 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.

Table 4-2

Part number and description of replaceable part

Part number

Description

0490-1896

RELAY 2C 3 VDC-COIL 2A 30 VDC

C A U T I O N

Electrostatic Discharge (ESD) Precautions

Almost all electrical components can be damaged by electrostatic
discharge (ESD) during handling. The following guidelines will help
prevent ESD damage when servicing the instrument or any electronic
device.

•

Disassemble the instruments in a static-free work area

only

•

Use a conductive work area to dissipate static charge.

•

Use a conductive wrist strap to dissipate static charge
accumulation.

•

Minimize handling.

•

Keep the replacement parts in original static-free packaging.

•

Remove all plastics, styrofoams, vinyls, papers, and other
static-generating materials from the immediate work area.

•

Use

only

antistatic solder extractor.

Содержание U2751A

Страница 1: ...Agilent Technologies Agilent U2751A USB Modular Switch Matrix User s and Service Guide ...

Страница 2: ...y Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accor dance with the terms of such license Restricted Rights Legend U S Government Restricted Rights Soft ware and technical data rights granted to the federal government include only those rights customarily provided to end user cus tomers Agilent provides this custom...

Страница 3: ...nt Caution risk of electric shock Three phase alternating current Caution risk of danger refer to this manual for specific Warning or Caution information Earth ground terminal Caution hot surface Protective conductor terminal Out position of a bi stable push control Frame or chassis terminal In position of a bi stable push control Equipotentiality CAT I Measurements performed on circuits not direc...

Страница 4: ...ed hazards CAUTION 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 impai...

Страница 5: ...g 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 CAUTION 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...

Страница 6: ...nce with the Australia EMC Framework regulations under the terms of the Radio Communication Act of 1992 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 This instrument complies with the WEEE Directive 2002 96 EC marking requirement This affixed product label indicates that you must not discard this electrica...

Страница 7: ...s 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 a...

Страница 8: ...igure 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 4 Service Information This chapter provides the guidelines for returning the U2751A to Agilent Technologies for se...

Страница 9: ...f 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 NOTE If you are unable to search for the respective DoC please contact your local Agilent representative ...

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Страница 11: ...umpers 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 2...

Страница 12: ... Conditions 25 SCPI Commands for System Related Tasks 26 3 Characteristics and Specifications 27 Product Characteristics 28 Product Specifications 30 4 Service Information 33 Checking Defective Relay s 34 Replaceable Parts 35 Disassembly Instructions 36 Reassembly Instructions 38 Contacting Agilent Technologies 38 ...

Страница 13: ...nfiguration 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 ...

Страница 14: ...XIV U2751A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Страница 15: ...us 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 ...

Страница 16: ...XVI U2751A User s and Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Страница 17: ...ions 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 ...

Страница 18: ...r 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 in...

Страница 19: ...Getting Started 1 U2751A User s and Service Guide 3 Product at a Glance Product Outlook Top View Bumpers ...

Страница 20: ... User s and Service Guide 1 Getting Started Front View Rear View DSub connector Power indicator USB indicator 55 pin backplane connector USB inlet Power inlet Fastening hole for USB cable with locking mechanism ...

Страница 21: ...Getting Started 1 U2751A User s and Service Guide 5 Product Dimensions Dimensions Without Bumpers Top View Front View 105 00 mm 175 00 mm 25 00 mm ...

Страница 22: ...6 U2751A User s and Service Guide 1 Getting Started Dimensions With Bumpers Top View 117 00 mm 41 00 mm Front View 180 00 mm ...

Страница 23: ...est Agilent Sales Office 12 V 2 A AC DC adapter Power cord USB Standard A to Mini B interface cable L Mount kit used with the modular instrument chassis Agilent Automation Ready CD ROM contains the Agilent IO Libraries Suite Agilent USB Modular Products and Systems Quick Start Guide Agilent USB Modular Products and Systems Product Reference DVD ROM Agilent Measurement Manager Quick Reference Card ...

Страница 24: ...ce attach a tag identifying the owner and model number Also include a brief description of the problem Electrical Check Chapter 4 Service Information on page 33 will provide the complete verification procedure The procedure will verify to a high level of confidence that the U2751A is operating in accordance with its specifications General Maintenance 1 Power off your module and remove the power co...

Страница 25: ...p by step instructions shown in the Agilent 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 Agilent VEE Pro LabVIEW or Microsoft Visual Studio ...

Страница 26: ... Pin Assignments R represents Row and C represents Column H represents High and L represents Low Figure 1 1 25 pin male DSub connector 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 ...

Страница 27: ...lows the user to configure a wide variety of routing options and matrix topologies The U2922A pin configuration is in accordance to the 25 pin male DSub connector of the U2751A as shown in the following R represents Row and C represents Column H represents High and L represents Low Figure 1 2 U2922A pin configuration You may also develop your own terminal block by using a compatible mating 25 pin ...

Страница 28: ...ser s and Service Guide 1 Getting Started The outlook and dimensions of the U2922A are shown in Figure 1 3 and Figure 1 4 Figure 1 3 U2922A outlook Terminal block Female DSub connector Retractable cover Jack screw ...

Страница 29: ...Getting Started 1 U2751A User s and Service Guide 13 Figure 1 4 U2922A dimensions Rear View 85 00 mm 23 00 mm Top View Front View 85 00 mm 23 00 mm 105 00 mm 90 00 mm 105 00 mm Side View 23 00 mm ...

Страница 30: ... 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 NOTE You are required to connect the cables to the U2922A terminal block prior to attaching the U2922A to the U2751A Ensure that you power off your device and unplug the U2922A from the U2751A to ...

Страница 31: ...etractable 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 Ensure that the terminal block is installed correctly with the screws properly tighten for secure operation Snap fit clasp of the retractable cover and the housing Jack screws of t...

Страница 32: ...D TRIG5 GND NC 9 GND NC STAR_TRIG NC 8 TRIG2 GND GND NC GND TRIG6 GA2 NC 7 GND NC TRIG1 GND GA1 NC 6 GND NC GND TRIG7 GA0 NC 5 GND NC TRIG0 GND NC NC 4 GND VBUS GND 12 V 12 V 12 V 3 GND GND GND 12 V 12 V 12 V 2 GND USB_D USB_D GND 12 V 12 V 1 F E D C B A Table 1 2 Synchronous Simultaneous Interface SSI connector pin description SSI timing signal Functionality GND Ground NC Not connected VBUS USB b...

Страница 33: ... 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 4 Insert your U2751A module into the U2781A chassis with the 55 pin backplane connector positioned at the bottom of the module 5 Once you have slotted the module into the chassis tighten the screws of the L...

Страница 34: ...18 U2751A User s and Service Guide 1 Getting Started THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Страница 35: ...s and Service Guide 2 Operation and Features Power Up 20 Switch Control 21 Relay Cycle Counter 24 System Related Operation 25 Self Test 25 Error Conditions 25 SCPI Commands for System Related Tasks 26 This chapter describes the features and operation of the U2751A ...

Страница 36: ... the IO Libraries Suite 14 2 or higher Both of these are included when you purchase the U2751A Refer to the Agilent 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 1 Product Outlook on page 3 Power indicator lights up once the U2751A is powered up USB indicator will only blink when ther...

Страница 37: ... Figure 2 1 Each cross point relay on this module has its own unique channel label representing the row and column For example channel 302 represents the cross point connection between row 3 and column 2 Be aware that it is possible to connect more than one source to the same point with a matrix It is vital to make sure that these connections do not create dangerous or unwanted conditions Note Thr...

Страница 38: ...d 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 The connection from the row to the column will be highlighted when the circuit is closed Figure 2 2 Panel view of the Agilent Measurement Manager ...

Страница 39: ...ntact at channel 302 Example 2 Break contact at channel 302 Example 3 Make contact at channel 101 302 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 ROUTe OPEN 302 Opens the relay at row 3 column 2 ROUTe CLOSe 101 302 Closes relays at row 1 column 1 and row 3 column 2 ...

Страница 40: ...b 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 Refer to the example in Figure 2 3 Figure 2 3 Panel view of the relay cycle counter ...

Страница 41: ...Manager Operation Ensure that the switch terminals are not connected to any instrument Turn on the U2751A On the application panel select Tools Self Test This will perform a series of communication tests on the module which take a couple of seconds to complete Error Conditions Agilent Measurement Manager Operation A message box will appear once an error occurs while operating the U2751A using the ...

Страница 42: ...em 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 SYST ERR Returns the error number and its corresponding message string from the error queue 0 No Error ...

Страница 43: ...Modular Switch Matrix User s and Service Guide 3 Characteristics and Specifications Product Characteristics 28 Product Specifications 30 This chapter specifies the characteristics environmental conditions and specifications of the U2751A ...

Страница 44: ...eters Pollution degree 2 For indoor use only STORAGE COMPLIANCE 20 C to 70 C SAFETY COMPLIANCE Certified with IEC 61010 1 2001 EN61010 1 2001 2nd Edition Canada CAN CSA C22 2 No 61010 1 04 USA ANSI UL 61010 1 2004 EMC COMPLIANCE IEC 61326 2002 EN61326 1997 A1 1998 A2 2001 A3 2003 Canada ICES 001 2004 Australia New Zealand AS NZS CISPR11 2004 SHOCK AND VIBRATION Tested to IEC EN 60068 2 I O CONNECT...

Страница 45: ...ake note that for the product the warranty does not cover Damage from contamination Normal wear and tear of mechanical components Manuals CALIBRATION Annual calibration is not required 1 For remote connections using Agilent E5813A refer to Chapter 1 2 Compatible with Microsoft Windows operating systems only 3 Requires a direct USB connection to the PC so the appropriate driver can be in stalled in...

Страница 46: ...d with U2781A 42 VDC 35 Vrms 180 VDC 180 Vrms Max transient voltage 300 Vrms Max current Switch current Carry current 2 A 2 A Power W VA 2 60 W 62 5 VA Volt Hertz limit 108 General specifications Thermal emf differential 3 μV Initial closed channel resistance 1 5 Ω DC isolation ch ch ch earth 10 GΩ AC characteristics Bandwidth3 45 MHz 30 MHz Insertion loss 100 kHz 1 MHz 10 MHz 45 MHz 0 2 dB 0 3 dB...

Страница 47: ...hannel resistance power loss per module 3 50 Ω source 50 Ω load differential measurements verified with a 4 port network analyzer Sdd21 Table 3 1 Electrical and mechanical specifications update per attached data sheet continued General characteristics Relay life typical No load 10 V 100 mA Related load 100 M 10 M 100 k Open close time 4 ms 4 ms ...

Страница 48: ...32 U2751A User s and Service Guide 3 Characteristics and Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Страница 49: ...cking Defective Relay s 34 Replaceable Parts 35 Disassembly Instructions 36 Reassembly Instructions 38 Contacting Agilent Technologies 38 This chapter provides guidelines for returning your instrument to Agilent for service or repair and for servicing it yourself A list of replaceable parts is also provided ...

Страница 50: ...ndicate that these two pins are connected or shorted 3 Once this is done use the same method and perform the same test on pins RxH and CyH These two pins should be connected or shorted as well 4 Now open the particular relay s Using the same method check if pins RxL and CyL are disconnected Perform the same test on pins RxH and CyH as well Figure 4 4 Defective relay s check NOTE It is recommended ...

Страница 51: ...escription 0490 1896 RELAY 2C 3 VDC COIL 2A 30 VDC CAUTION Electrostatic Discharge ESD Precautions Almost all electrical components can be damaged by electrostatic discharge ESD during handling The following guidelines will help prevent ESD damage when servicing the instrument or any electronic device Disassemble the instruments in a static free work area only Use a conductive work area to dissipa...

Страница 52: ...51A User s and Service Guide 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 ...

Страница 53: ...et the relay cycle count to zero by issuing the following SCPI command DIAGnostic RELay CYCLes CLEar ch_list 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 ...

Страница 54: ...our nearest Agilent Service Center to arrange for the replacement of your instrument In the U S please call 800 829 4444 and then select Option 3 followed by Option 1 NOTE Every replacement unit has its own serial number The serial number of the defective unit does not transfer to the replacement unit The warranty period of the replacement unit is based on the remaining warranty of the defective U...

Страница 55: ...ice under test See DUT disassembly See relays replacing DSub connector 10 34 DUT 2 E electrical check 8 electrostatic discharge See precautions error conditions Agilent Measurement Manager operation 25 SCPI Commands 26 F flowchart 9 G GND 10 16 I I O cable 8 inspection initial 8 introduction U2751A USB modular switch matrix 2 IVI COM driver 9 L LED indicators 20 L Mount kit 7 17 M matrix V VIII 2 ...

Страница 56: ..._list 37 disassembly 36 ESD precautions 35 reassembly 38 replaceable parts See parts replaceable row 2 10 21 22 23 34 S SCPI commands 2 23 26 self calibration 25 self test 25 26 service Agilent unit exchange 38 types of service available 38 SSI connector pin 16 SSI timing signal 16 STAR_TRIG 16 switch control Agilent Manager Measurement operation 22 introduction 21 SCPI Commands 23 switch matrix c...

Страница 57: ... tel 800 810 0189 fax 800 820 2816 Europe tel 31 20 547 2111 Japan tel 81 426 56 7832 fax 81 426 56 7840 Korea tel 080 769 0800 fax 080 769 0900 Latin America tel 305 269 7500 Taiwan tel 0800 047 866 fax 0800 286 331 Other Asia Pacific Countries tel 65 6375 8100 fax 65 6755 0042 Or visit Agilent World Wide Web at www agilent com find assist Product specifications and descriptions in this document ...

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