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Agilent TS-5000 Functional Test System

E6198B Switch/Load Unit User Manual

Agilent Technologies

Notices

CAUTION

WARNING

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 Agilent Technologies, Inc. as governed by United States and international copyright laws.

This manual covers the following Agilent equipment:

• E6198B Switch/Load Unit

• E6175A 8-Channel High Current

Load Card

• E6176A 16-Channel High Current

Load Card

• E6177A 24-Channel Medium Current

Load Card

• U1777A 24-Channel Medium

Current Load Card

• U7178A 8-Channel Heavy Duty Load

Card

• U7179A 16-Channel High Current

Load Card

• E6178B 8-Channel Heavy Duty Load

Card

• N9377A 16-Channel Dual-Load Load

Card

• N9378A 24-Channel Low Resistance

Load Card

• N9379A 48-Channel High Density

Load Card

• E8792A Pin Matrix Card

• E8793A Pin Matrix Card

• E8782A 24-Instrument,

40-Measurement Matrix Card

• E8783A 64-Pin Matrix Card

• E8794A Custom Card

Manual Part Number

E6198-90050

Edition

9th Edition, August 2012

Printed in Malaysia

Agilent Technologies Microwave Products (Malaysia) Sdn. Bhd. Bayan Lepas Free Industrial Zone 11900 Penang, Malaysia

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, 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 Agilent 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.

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.

Restricted Rights Legend

defined in FAR 2.101(a) or as “Restricted computer software” as defined in FAR

52.227-19 (June 1987) or any equivalent agency regulation or contract clause. Use, duplication or disclosure of Software is subject to Agilent Technologies’ standard commercial license terms, and non-DOD Departments and Agencies of the U.S. Government will receive no greater than Restricted Rights as defined in FAR

52.227-19(c)(1-2) (June 1987). U.S. Government users will receive no greater than Limited Rights as defined in FAR 52.227-14 (June 1987) or DFAR 252.227-7015 (b)(2) (November 1995), as applicable in any technical data.

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.

1 Legal Information

Legal Information 1-2

Warranty 1-2 Technology Licenses 1-2 Restricted Rights Legend 1-2 Service and Support 1-3 Agilent on the Web 1-3 Agilent By Phone 1-3

2 Safety and Regulatory Information

Declaration of Conformity 2-2

Safety Information 2-3

Safety Summary 2-3 Safety Notice 2-3 General Safety Information 2-3 Environmental Conditions 2-4 Before Applying Power 2-4 Ground the System 2-5 Fuses 2-5 Operator Safety Information 2-5 Safety Symbols and Regulatory Markings 2-6

End of Life: Waste Electrical and Electronic Equipment (WEEE) Directive

2002/96/EC 2-8

3 Switch/Load Unit and Plug-In Cards

E6198B Standalone/Integrated Switch/Load Unit Rating 3-2

Electrical 3-2 Mechanical 3-2

E6198B Standalone Switch/Load Unit Description 3-3

USB Interface 3-5 Digital I/O 3-5 Digital Input 3-5 Open Drain Digital Output 3-6 DAC Channels 3-7 +5 Vdc, +12 Vdc, –12 Vdc, Spare Power 3-7 Current Sense 3-7 Power Bus Sense 3-7 Switch/Load Unit Block Diagram 3-7

E6198B Integrated Switch/Load Unit Description 3-9

E6198B/E6218A Switch/Load Unit User Manual iii

Backplane And Breakout Board Connectors and LEDs 3-10

Backplane Connector Name 3-12 Backplane J1, J2 and J3 Connectors 3-13 Breakout Board Connector Name (for E6198B Standalone

option) 3-14 Backplane Connectors 3-15 Backplane LEDs 3-16 J102 Pinouts 3-16 J1 Pinout 3-20 J2 Pinout 3-20 J3 Pinout 3-20 T1-T14 SLU Logic Power Supply Connector 3-21

Differentiating E6198B Standalone Option and System Integrated

Option 3-22 Fuse Ratings 3-24

DC Power Bus Connections 3-24

4 Configuring the Switch/Load Unit

Card Location Recommendations 4-2

Load Card Types and IDS 4-4

Connecting an Additional (Spare) Power Supply 4-5

Configuring the Power Busses 4-6

Setting the UUT Power Supply Remote/Local Sense Jumpers 4-8 Configuring the Current-Sense Jumpers 4-10

Connecting E6198B to the Computer via USB Interface or Parallel

Port 4-12

Adding a Second Switch/Load Unit 4-13

Load Box Installation 4-14

5 Using Load Cards and Loads

Load Card Capabilities 5-2

Loads Overview 5-4

Using the Load Cards 5-5

Load Card Type and Configuration ID 5-5

Using the Agilent E6175A 8-Channel Load Card 5-7

Selecting a Power Supply Configuration 5-9 Selecting a Current-Sense Method 5-10 Installing a LEM Current Transducer 5-11 Selecting and Loading Flyback Protection 5-14 Protection Devices 5-16

iv E6198B/E6218A Switch/Load Unit User Manual

Selecting a Load Fuse 5-17 Sample Load Configurations 5-17 Setting up a Bridge Configuration 5-19 Connecting Loads 5-20 Load Wiring 5-21 Current Sharing 5-22 UUT Connections 5-23

Using the Agilent E6176A 16-Channel Load Card 5-25

Selecting a Power Supply Configuration 5-27 Selecting a Current-Sense Resistor Value 5-28 Selecting a Load Fuse 5-28 Selecting and Loading Flyback Protection 5-28 Protection Devices 5-30 Connecting Loads 5-32 Load Wiring 5-32 Current Sharing 5-34 External Load Mounting Options 5-35 UUT Connections 5-36

Using the Agilent E6177A 24-Channel Load Card 5-38

Card Layout 5-40 Selecting a Power Supply Configuration 5-41 Using the Power Switches as General Purpose Relays 5-41 Connecting Loads 5-42 Load Wiring 5-44 UUT Connections 5-45

Using the Agilent U7177A 24-Channel Load Card 5-47

Selecting a Power Supply Configuration 5-49 Selecting a Current-Sense Resistor Value 5-50 Using the Power Switches as General Purpose Relays 5-50 Connecting Loads 5-51 Load Wiring 5-52 UUT Connections 5-54

Using the Agilent E6178B 8-Channel Load Card 5-55

Selecting a Power Supply Configuration 5-57 Local / Remote Sensing 5-58 Selecting a Load Fuse 5-58 Current Monitor 5-59 Selecting and Loading Flyback Protection 5-59 Protection Devices 5-60 Load and UUT Connections 5-61

Using the Agilent U7178A 8-Channel Heavy Duty Load Card 5-63

E6198B/E6218A Switch/Load Unit User Manual v

Selecting a Power Supply Configuration 5-65 Local/Remote Sensing 5-66 Selecting a Load Fuse 5-66 Current Monitor 5-66 Selecting and loading flyback protection 5-67 Protection Devices 5-68 Load and UUT connections 5-69

Using the Agilent U7179A 16-Channel High Current Load Card 5-71

Selecting a Power Supply Configuration 5-73 Selecting a Current-Sense Resistor Value 5-74 Selecting a Load Fuse 5-74 Selecting and Loading Flyback Protection 5-74 Protection Devices 5-75 Load Wiring 5-77 External Load Mounting Options 5-79 UUT Connections 5-81

Using the Agilent N9377A 16-Channel Dual-Load Load Card 5-83

Selecting a Power Supply Configuration 5-86 Selecting a Current-Sense Resistor Value 5-86 Selecting a Load Fuse 5-86 Selecting and Loading Flyback Protection 5-87 Protection Devices 5-88 Connecting Loads 5-90 Load Wiring 5-90 Recommended Connectors 5-94 Current Sharing 5-95 External Load Mounting Options 5-95 UUT Connections 5-96

Using the Agilent N9378A 24-Channel Low Resistance Load Card 5-97

Selecting a Power Supply Configuration 5-100 Using the Power Switches as General Purpose Relays 5-100 Connecting Loads 5-101 Installing and Removing Mezzanine Cards 5-102 Wiring the Mezzanine Cards 5-103 UUT Connections 5-103

Using the Agilent N9379A 48-Channel High-Density Load Card 5-105

Card Layout 5-107 Load Circuit Details 5-109 Selecting a Power Supply Configuration 5-109 Using the Power Switches as General Purpose Relays 5-110 Connecting Loads 5-110

vi E6198B/E6218A Switch/Load Unit User Manual

6 Using the Pin Matrix Cards

Using the 32-Pin Matrix Cards 6-2

Conceptual Overview 6-2 Features 6-2 Detailed Block Diagram Descriptions 6-3 Differences Between the Cards 6-3 Features Common to Both Cards 6-3 Relay Timer 6-7 Column Disconnect Relay Control 6-7 OAR 6-7 Reset 6-7 Protection Bypass 6-8 Reset State 6-8 User Connectors and Pinouts 6-8 J1 Connector Pinouts 6-9 J1 Instrument Connections 6-11 P2 Connector Pinouts 6-14 Installing in the Switch/Load Unit 6-15

Using the 64-Pin Matrix Cards 6-16

Conceptual Overview 6-16 Features 6-16 Detailed Block Diagram Descriptions 6-17 Differences Between the Cards 6-17 Features Common to Both Cards 6-17 OAR 6-21 Reset 6-21 Protection Bypass 6-21 Reset State 6-22 User Connectors and Pinouts 6-22 J1 Connector Pinouts 6-23 P2 Connector Pinouts 6-27 Installing in the Switch/Load Unit 6-29

7 Using the Custom Card

General-Purpose Breadboard 7-2

TS-5430 Series I Emulation 7-2

Digital I/O 7-2

Connector Breakouts 7-4

J2 Connector Breakouts 7-4 J3/J4 Connector Breakouts (DAC) 7-5 J3 or J4 Connector Breakouts (Event Detector) 7-6 J5 and J6 Connector Breakouts (32-Pin Matrix Cards) 7-7

E6198B/E6218A Switch/Load Unit User Manual vii

E8794A Components and Schematics 7-8

A Switch/Load Unit And Card Specifications

Agilent E6198B Switch/Load Unit Specifications A-2

Agilent E6175A 8-Channel High-Current Load Card Specifications A-3

Agilent E6176A 16-Channel High-Current Load Card Specifications A-4

Agilent E6177A 24-Channel Medium-Current Load Card

Specifications A-5

Agilent U7177A 24-Channel Medium-Current Load Card

Specifications A-6

Agilent E6178B 8-Channel Heavy Duty Load Card Specifications A-7

Agilent U7178A 8-Channel Heavy Duty Load Card Specifications A-8

Agilent U7179A 16-Channel High Current Load Card Specifications A-9

Agilent N9377A 16-Channel Dual-Load Load Card Specifications A-10

Agilent N9378A 24-Channel Low-Resistance Load Card

Specifications A-11

Agilent N9379A 48-Channel High-Density Load Card Specifications A-12

Agilent E8792A and E8793A Specifications A-13

Instrument Multiplexer (Agilent E8792A Only) A-13 General Specifications (Agilent E8792A and E8793A) A-13 Relay Characteristics (Agilent E8792A and E8793A) A-14

Agilent E8782A and E8783A Specifications A-15

Instrument Multiplexer (Agilent E8782A Only) A-15 General Specifications (Agilent E8782A and E8783A) A-15 Relay Characteristics (Agilent E8782A and E8783A) A-16 Relay Life A-16 End-of-Life Detection A-16 Replacement Strategy A-17

B Register Definitions

Address Space B-2

Base Address B-3

Switch/Load Unit Register Definitions B-4

Card Type (R)Base + 0 Card Configuration (R) Base + 1 Status Register (R) Base + 2 Fixture ID (R) Base + 3 Digital Input (R) Base + 4 DAC1 Output MSB (W) Base + 8

h B-5

h B-6

viii E6198B/E6218A Switch/Load Unit User Manual

DAC1 Output LSB (W) Base + 9

h B-6

DAC Scaling B-7 Control Register (W) Base + A Open Collector Output (W) Base + B Digital Output (W) Base + C DAC2 Output MSB(W) Base + D DAC2 Output LSB (W) Base + E

h B-7

h B-8

h B-9

Load Card Register Definitions B-10

Agilent E6175A 8-Channel High-Current Load Card B-11 Agilent E6176A 16-Channel High-Current Load Card B-15 Agilent E6177A 24-Channel Medium-Current Load Card B-19 Agilent U7177A 24-Channel Medium-Current Load Card With Current

Sense B-23 Agilent U7178A 8-Channel 40 A Load Card B-28 Agilent U7179A 16-Channel 15 A Load Card B-29 Agilent E6178B 8-Channel 30 Amp Load Card Register

Definitions B-32 Agilent N9377A 16-Channel Dual-Load Load Card B-34 Agilent N9378A 24-Channel Low-Resistance Load Card B-40 Agilent N9379A 48-Channel High-Density Load Card B-50

Pin Matrix Card Register Definition B-63

C Repair Information

Support Strategy C-2

Locating Load Card Components C-2

A Glossary Of Terms

Agilent E8792A and E8793A Pin Card Register Definitions B-63 Agilent E8782A 24-Instrument, 40-Measurement Matrix Card B-71 Agilent E8783A 64-Pin Matrix Card B-80 Agilent E8794A Custom Card Register Definitions B-89

Agilent E6175A 8-Channel High-Current Card C-2 Agilent E6176A 16-Channel High-Current Card C-4 Other Load Cards C-5 32-Pin Matrix Modules C-5 64-Pin Matrix Modules C-8

E6198B/E6218A Switch/Load Unit User Manual ix

THIS PAGE IS INTENTIONALLY LEFT BLANK.

x E6198B/E6218A Switch/Load Unit User Manual

List of Figures

1 Legal Information

2 Safety and Regulatory Information

3 Switch/Load Unit and Plug-In Cards

Figure 3-1. Agilent E6198B Standalone Switch/Load Unit Front View 3-4 Figure 3-2. Agilent E6198B Standalone Switch/Load Unit Back View 3-4 Figure 3-3. Digital Input Example 3-6 Figure 3-4. Digital Output Example 3-6 Figure 3-5. Switch/Load Unit Block Diagram 3-8 Figure 3-6. E6198B Integrated SLU Back View 3-9 Figure 3-7. Switch/Load Unit Backplane Connectors (USB port adaptor board Not

Figure 3-8. Switch/Load Unit Breakout Board Connectors (Standalone only) 3-11 Figure 3-9. Switch/Load Unit J102 Connector Pinouts 3-17 Figure 3-10. Cable Connector Pinouts 3-18 Figure 3-11. Switch/Load Unit Rear View (Standalone Option) 3-22 Figure 3-12. Switch/Load Unit Rear View (System Integrated Option) 3-23

Shown) 3-10

4 Configuring the Switch/Load Unit

Figure 4-1. Example of Load/Matrix/Custom Cards Loading Order 4-3 Figure 4-2. Component Location/Schematic for User-Installed External Power

Supply 4-5 Figure 4-3. Spare Supply (Input) Connector on SLU rear (SLU standalone) 4-5 Figure 4-4. Power Bus Connectors J801 and J802 4-6 Figure 4-5. Example A: Three Separate Supplies on PB1 - PB4 4-7 Figure 4-6. Example B: Isolated Power Supplies 4-7 Figure 4-7. DC Power Bus Connector Of Standalone SLU 4-8 Figure 4-8. Conceptional View of Local/Remote Sensing 4-9 Figure 4-9. PB Sense Remote/Local Interface (Standalone SLU) 4-10 Figure 4-10. PB Sense Remote/Local and Frame Select Interface (Integrated SLU) 4-10 Figure 4-11. ISense Bussed/Split Interface (Standalone SLU) 4-11 Figure 4-12. ISense Bussed/Split Interface (Integrated SLU) 4-11 Figure 4-13. USB Cable Connections 4-12 Figure 4-14. Frame Select Interface (Standalone SLU) 4-13 Figure 4-15. Load Box Installed 4-14

5 Using Load Cards and Loads

Figure 5-1. Loads/Sources Conceptual Overview 5-4 Figure 5-2. Pin Assignments on the Card Configuration Jack 5-5

E6198B/E6218A Switch/Load Unit User Manual xi

Figure 5-3. Agilent E6175A 8-Channel High-Current Load Card Block Diagram 5-8 Figure 5-4. Agilent E6175A 8-Channel Load Card Layout 5-9 Figure 5-5. LEM Current Transducer 5-11 Figure 5-6. Component Location for Installing LEM Current Transducer Module 5-12 Figure 5-7. Wiring Options of LEM Model LA25-NP Primary for Various Current

Ranges 5-13 Figure 5-8. 8-Channel Load Card Detail - Flyback Protection Circuit 5-15 Figure 5-9. Agilent E6175A Flyback Protection Polarity 5-15 Figure 5-10. Typical Agilent E6175A Load Card Flyback Protection Circuit 5-16 Figure 5-11. Agilent E6175A Load Examples 5-18 Figure 5-12. Bridge Configuration for Channels 7 and 8 on 8-Channel Load Card 5-19 Figure 5-13. Agilent E6175A Load Mounting Area and CN1/J1 Connectors 5-20 Figure 5-14. Agilent E6175A Load Wiring Schematic and CN1 Pinouts 5-21 Figure 5-15. Agilent E6175A Current Sharing Example 5-22 Figure 5-16. Agilent E6175A 8-Channel High-Current Load Card UUT Connections 5-24 Figure 5-17. Agilent E6176A 16-Channel High-Current Load Card Block Diagram 5-26 Figure 5-18. Agilent E6176A 16-Channel Load Card Layout 5-27 Figure 5-19. 16-Channel Load Card - Flyback Device Polarity Orientation 5-29 Figure 5-20. 16-Channel Load Card - Flyback Circuit Detail 5-30 Figure 5-21. Typical Agilent E6176A Load Card Flyback Protection Circuit 5-31 Figure 5-22. Agilent E6176A Connectors J1/J2 and Mating Connectors CN1/CN2 5-32 Figure 5-23. Agilent E6176A Load Wiring Schematic and CN1/CN2 Pinouts 5-33 Figure 5-24. Agilent E6176A Current Sharing Example 5-34 Figure 5-25. Example: Load Plate with Loads 5-36 Figure 5-26. Agilent E6176A CN2 Connector Pinouts 5-37 Figure 5-27. Agilent E6177A 24-Channel Medium-Current Load Card Block

Diagram 5-39 Figure 5-28. Agilent E6177A 24-Channel Load Card Layout 5-40 Figure 5-29. Using the 24-Channel Load Card Switches as GP Relays 5-42 Figure 5-30. Agilent E6177A Load Mounting Area and CN1/J1 Connectors 5-43 Figure 5-31. Agilent E6177A Load Wiring Schematic and CN1 Pinouts 5-44 Figure 5-32. Agilent E6177A 24-Channel Medium-Current Load Card UUT

Connections 5-46 Figure 5-33. Agilent U7177A 24-Channel Medium-Current Load Card Block

Diagram 5-48 Figure 5-34. The U7177A Layout 5-49 Figure 5-35. Using the 24-Channel Load Card Switches as GP Relays 5-51 Figure 5-36. Agilent U7177A Connector J1 and Mating Connector CN1 5-52 Figure 5-37. Agilent U7177A Load Wiring Schematic and CN1 Pinouts 5-53 Figure 5-38. Agilent U7177A 24-Channel Medium-Current Load Card UUT

Connections 5-54 Figure 5-39. Agilent E6178B 8-Channel Heavy Duty Load Card Block Diagram 5-56 Figure 5-40. Agilent E6178B 8-Channel Heavy Duty Load Card Layout 5-57 Figure 5-41. Typical Agilent E6178B Load Card Flyback Protection Circuit

5-60

xii E6198B/E6218A Switch/Load Unit User Manual

Figure 5-42. Agilent E6178B Load Card Wiring 5-62 Figure 5-43. Agilent U7178A 8-Channel Heavy Duty Load Card Block Diagram 5-64 Figure 5-44. Agilent U7178A 8-Channel Heavy Duty Load Card Layout 5-65 Figure 5-45. Typical Agilent U7178A load card flyback protection circuit 5-68 Figure 5-46. Agilent U7178A load card wiring 5-70 Figure 5-47. Agilent U7179A 16-Channel High-Current Load Card Block Diagram 5-72 Figure 5-48. Agilent U7179A 16-Channel Load Card Layout 5-73 Figure 5-49. Typical Agilent U7179A Load Card Flyback Protection Circuit 5-76 Figure 5-50. Agilent U7179A Connectors J1/J2 and Mating Connectors CN1/CN2 5-77 Figure 5-51. Agilent U7179A Load Wiring Schematic and CN1/CN2 Pinouts 5-78 Figure 5-52. Agilent U7179A Current Sharing Example 5-79 Figure 5-53. Example: Load Plate with loads 5-80 Figure 5-54. Agilent U7179A CN2 Connector Pinouts 5-82 Figure 5-55. Agilent N9377A 16-Channel Dual-Load Load Card Block Diagram 5-84 Figure 5-56. N9377A 16-Channel Load Card Layout 5-85 Figure 5-57. N9377A Load Card - Flyback Locator and Polarity Orientation 5-87 Figure 5-58. N9377A Load Card - Flyback Circuit Detail 5-88 Figure 5-59. Typical Agilent N9377A Load Card Flyback Protection Circuit 5-89 Figure 5-60. Agilent N9377A Connectors J1/J2 and Mating Connectors J1/J2 5-90 Figure 5-61. N9377A Load Wiring Schematic 5-92 Figure 5-62. J1 and J2 Connector Layout 5-93 Figure 5-63. Agilent N9377A Pinout Table (160-pin option) 5-94 Figure 5-64. Agilent N9377A Current Sharing Example 5-95 Figure 5-65. Agilent N9378 24-Channel Low-Resistance Load Card Block Diagram 5-98 Figure 5-66. Agilent N9378A 24-Channel Load Card Layout 5-99 Figure 5-67. Load circuit details 5-100 Figure 5-68. Agilent N9378A Load Mounting Area and CN1/J1 Connectors 5-102 Figure 5-69. Mezzanine Card Pinouts for N9378A 24-Channel Load Card 5-103 Figure 5-70. Agilent N9378A UUT Connector 5-104 Figure 5-71. Agilent N9379A 48-Channel High-Density Load Card Block Diagram 5-106 Figure 5-72. Agilent N9379A Layout 5-108 Figure 5-73. Load Circuit Details 5-109 Figure 5-74. Agilent N9379A Mezzanine Card 5-110

6 Using the Pin Matrix Cards

Figure 6-1. Pin Matrix Cards Conceptual Overview 6-2 Figure 6-2. Agilent E8792A Detailed Block Diagram 6-5 Figure 6-3. Agilent E8793A Detailed Block Diagram 6-6 Figure 6-4. Column Disconnect and Protection Bypass Relays 6-8 Figure 6-5. J1 Pinouts--Instrument and Abus Access 6-10 Figure 6-6. J1 Example Instrument Connections 6-11 Figure 6-7. Instrument BNC Cables 6-12 Figure 6-8. J2 Pinouts--Rear Aux Access 6-13

E6198B/E6218A Switch/Load Unit User Manual xiii

Figure 6-9. P2 Pinouts--Row, Aux, and UUT Common Main Access 6-14 Figure 6-10. Installed 32-Pin Matrix Cards 6-15 Figure 6-11. Pin Matrix Cards Conceptual Overview 6-16 Figure 6-12. Agilent E8782A Detailed Block Diagram 6-19 Figure 6-13. Agilent E8783A Detailed Block Diagram 6-20 Figure 6-14. Column Disconnect and Bypass Protection Relays 6-22 Figure 6-15. J1 Pinouts--Instrument and Abus Access 6-23 Figure 6-16. J2 Pinouts--Rear Aux Access for E8782A 6-25 Figure 6-17. J2 Pinouts--Rear Aux Access for E8783A 6-26 Figure 6-18. P2 Pinouts--Row, Aux, and UUT Common Main Access for E8782A 6-27 Figure 6-19. P2 Pinouts-Row, Aux, and UUT Common Main Access for E8783A 6-28 Figure 6-20. Installed 32-Pin Matrix Cards 6-29

7 Using the Custom Card

Figure 7-1. Custom Card Features 7-3 Figure 7-2. J2 Configuration Lines Pinouts 7-4 Figure 7-3. J3/J4 Breakouts for Agilent E1418 DAC 7-5 Figure 7-4. J3 or J4 Connector Breakouts for Agilent E6174 Event Detector 7-6 Figure 7-5. J5 and J6 Breakouts (32-Pin Matrix Cards) 7-7 Figure 7-6. E8794A Layout 7-8 Figure 7-7. E8794A Component Locator 7-9 Figure 7-8. E8794A Schematic 7-10 Figure 7-9. Status and Control Interface 7-11

A Switch/Load Unit And Card Specifications

B Register Definitions

Figure B-1. Relay controlled by registers Base+03h-Base+09h B-35 Figure B-2. Mezzanine Card Layout B-42 Figure B-3. Mezzanine Card Layout B-53

C Repair Information

Figure C-1. Agilent E6175A Component Locator (Rear View) C-3 Figure C-2. Agilent E6176A 16-Channel Load Card Component Locator (Rear View) C-4

A Glossary Of Terms

xiv E6198B/E6218A Switch/Load Unit User Manual

List of Tables

1 Legal Information

2 Safety and Regulatory Information

3 Switch/Load Unit and Plug-In Cards

4 Configuring the Switch/Load Unit

Table 1-1. Agilent Sales And Support Contact Numbers 1-3

Table 2-1. Environment Requirements 2-4 Table 2-2. Safety Symbols and Regulatory Markings 2-6

Table 3-1. Switch/Load Unit Rating (Electrical) 3-2 Table 3-2. Switch/Load Unit Rating (Mechanical) 3-2 Table 3-3. Backplane Connectors for E6198B 3-12 Table 3-4. Backplane Factory Default Connector Settings 3-13 Table 3-5. Breakout Board Connectors 3-14 Table 3-6. J102 signal definitions 3-19 Table 3-7. Switch/Load Unit J1 Pinout 3-20 Table 3-8. Switch/Load Unit J2 Pinout 3-20 Table 3-9. Switch/Load Unit J3 Pinout 3-20 Table 3-10. Power Supply Input for each Jumpers 3-21 Table 3-11. Fuses Ratings 3-24

5 Using Load Cards and Loads

Table 5-1. Load Card Capabilities 5-2 Table 5-2. Components involved in LEM Module Installation 5-13 Table 5-3. CH1 to CH16 flyback protection 5-75

6 Using the Pin Matrix Cards

7 Using the Custom Card

A Switch/Load Unit And Card Specifications

B Register Definitions

Table B-1. Standard Registers B-2 Table B-2. Standard Registers B-2 Table B-3. Switch/Load Unit Registers B-4 Table B-4. DAC Scaling Examples B-7 Table B-5. OCout

Table B-6. Summary of Load Card Register Definitions B-10

States B-8

E6198B/E6218A Switch/Load Unit User Manual xv

C Repair Information

Table C-1. Measurement Matrix Relays C-5 Table C-2. Instrument Matrix Relays C-7 Table C-3. Bypass and Disconnect Relays C-7 Table C-4. Miscellaneous Relays C-7 Table C-5. Measurement Matrix Relays for E8782A C-8 Table C-6. Measurement Matrix Relays for E8783A C-10 Table C-7. Bypass and Disconnect Relays for E8782A and E8783A C-12

A Glossary Of Terms

xvi E6198B/E6218A Switch/Load Unit User Manual

Agilent TS-5000 E6198B/E6218A Switch/Load Unit User Manual

1 Legal Information

Legal Information 1-2

Warranty 1-2 Technology Licenses 1-2 Restricted Rights Legend 1-2 Service and Support 1-3 Agilent on the Web 1-3 Agilent By Phone 1-3

Agilent Technologies

1-1

1 Legal Information

Legal Information

Warranty

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.

Restricted Rights Legend

If software is for use in the performance of a U.S. Government prime contract or subcontract, Software is delivered and licensed as “Commercial computer software” as defined in DFAR 252.227-7014 (June 1995), or as a “commercial item” as defined in FAR 2.101(a) or as “Restricted computer software” as defined in FAR 52.227-19 (June 1987) or any equivalent agency regulation or contract clause. Use, duplication or disclosure of Software is subject to Agilent Technologies’ standard commercial license terms, and non-DOD Departments and Agencies of the U.S. Government will receive no greater than Restricted Rights as defined in FAR 52.227-19(c)(1-2)(June

1987). U.S. Government users will receive no greater than Limited Rights as defined in FAR 52.227-14 (June 1987) or DFAR 252.227-7015 (b)(2)(November 1995), as applicable in any technical data.

1-2 E6198B/E6218A Switch/Load Unit User Manual

Service and Support

Agilent on the Web

Agilent By Phone

Legal Information 1

Any adjustment, maintenance, or repair of this product must be performed by qualified personnel. Contact your customer engineer through your local Agilent Technologies Service Center.

You can find information about technical and professional services, product support, and equipment repair and service on the Web: http://www.agilent.com/

Double-click the link to Test & Measurement. Select your country from the drop-down menus. The Web page that appears next has contact information specific for your country.

If you do not have access to the Internet, call one of the numbers in Table 1-1

Table 1-1 Agilent Sales And Support Contact Numbers

Americas Canada (877) 894-4414

Latin America 305 269 7500

United States (800) 829-4444

Asia Pacific Australia 1 800 629 485

China 800 810 0189

Hong Kong 800 938 693

India 1 800 112 929

Japan 0120 (421) 345

Korea 080 769 0800

Malaysia 1 800 888 848

Singapore 1 800 375 8100

Taiwan 0800 047 866

Thailand 1 800 226 008

E6198B/E6218A Switch/Load Unit User Manual 1-3

1 Legal Information

Table 1-1 Agilent Sales And Support Contact Numbers (continued)

Europe & Middle East Austria 01 36027 71571

Belgium 32 (0) 2 404 93 40

Denmark 45 70 13 15 15

Finland 358 (0) 10 855 2100

France 0825 010 700*

*0.125 €/minute

Germany 07031 464 6333**

**0.14 €/minute

Ireland 1890 924 204

Israel 972-3-9288-504/544

Italy 39 02 92 60 8484

Netherlands 31 (0) 20 547 2111

Spain 34 (91) 631 3300

Sweden 0200-88 22 55

Switzerland 0800 80 53 53

United Kingdom 44 (0) 118 9276201

Other European Countries:

www.agilent.com/find/ contactus

Manufacturing Address

Agilent Technologies Microwave Products (Malaysia) Sdn. Bhd.

Bayan Lepas Free Industrial Zone,

11900 Penang,

Malaysia.

1-4 E6198B/E6218A Switch/Load Unit User Manual

Agilent TS-5000 E6198B/E6218A Switch/Load Unit User Manual

2 Safety and Regulatory Information

Declaration of Conformity 2-2 Safety Information 2-3

End of Life: Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC 2-8

Agilent Technologies

2-1

2 Safety and Regulatory Information

NOTE

Declaration of Conformity

The Declaration of Conformity (DoC) for this product is available on the Agilent Technologies website. You can search for the DoC by its product model or description at the following web address:

http://regulations.corporate.agilent.com/DoC/search.htm

If you are unable to locate the DoC, please contact your local Agilent representative.

2-2 E6198B/E6218A Switch/Load Unit User Manual

Safety Information

CAUTION

WARNING

Safety Summary

Safety Notice

Safety and Regulatory Information 2

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 elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies, Inc. assumes no liability for the customer's failure to comply with these requirements.

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.

General Safety Information

This product is provided with a protective earth terminal. The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE. Do not operate the product in the presence of flammable gases or flames.

E6198B/E6218A Switch/Load Unit User Manual 2-3

2 Safety and Regulatory Information

WARNING

CAUTION

Environmental Conditions

DO NOT REMOVE RACK PANELS OR INSTRUMENT COVERS. Operating personnel must not remove any rack panels or instrument covers. Component replacement and internal adjustments must be made only by qualified service personnel. Products that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by a qualified service personnel.

The protection provided by the Agilent TS-5000 system may be impaired if the system is used in a manner not specified by Agilent.

The Automotive Electronics Functional Test System is designed for indoor use only. Table 2-1 shows general environmental requirements.

Table 2-1 Environment Requirements

Environment Conditions Requirements

Maximum Altitude 2000 meters

Temperature (Operation) 5 °C to 40 °C

Maximum Relative Humidity The test system is designed to

operate in the range from 5% to 80% relative humidity (non-condensing).

This product is designed for use in Installation Category II and Pollution Degree 2, per IEC 61010-1.

Before Applying Power

Verify that the product is set to match the available line voltage and all safety precautions are taken. Note the external markings of the instruments described in “Safety Symbols and Regulatory

Markings”.

2-4 E6198B/E6218A Switch/Load Unit User Manual

Ground the System

WARNING

To minimize shock hazard, the instrument chassis and cover must be connected to an electrical protective earth ground. The instrument must be connected to the ac power 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 personal injury.

Fuses

Use only fuses with the required rated current, voltage, and specified type (normal blow, time delay). Do not use repaired fuses or short-circuited fuse holders. To do so could cause a shock or fire hazard.

For AC inlet fuse, use only 5A/250 Vac fuse with Time-Lag and Low Breaking capacity. For other fuse ratings, refer Table 3-11.

Safety and Regulatory Information 2

In order to avoid electrical hazards, all system internal fuses must be replaced by trained and qualified personnel.

Operator Safety Information

Module connectors and Test Signal cables connected to them cannot be operator accessible.

Cables and connectors are considered inaccessible if a tool (e.g. screwdriver, wrench, socket, etc.) or a key (equipment in a locked cabinet) is required to gain access to a conductive surface connected to any cable conductor (High, Low or Guard).

Assure the equipment under test has adequate insulation between the cable connections and any operator-accessible parts (doors, covers, panels shields, cases, cabinets, etc.)

Verify there are multiple and sufficient protective means (rated for the voltages you are applying) to assure the operator will NOT come into contact with any energized conductor even if one of the protective means fails to work as intended. For

E6198B/E6218A Switch/Load Unit User Manual 2-5

2 Safety and Regulatory Information

Safety Symbols and Regulatory Markings

example, the inner side of a case, cabinet, door cover or panel can be covered with an insulating material as well as routing the test cables to the front panel connectors of the module through non-conductive, flexible conduit such as that used in electrical power distribution.

Symbols and markings on the system, in manuals and on instruments alert you to potential risks, provide information about conditions, and comply with international regulations.

Table 2-2 defines the symbols and markings you may find in a

manual or on an instrument.

Table 2-2 Safety Symbols and Regulatory Markings

Symbols Description

Safety symbols

Warning: risk of electric shock.

Caution: refer to accompanying documents.

Alternating current.

Both direct and alternating current.

Earth (ground) terminal

Protective earth (ground) terminal

Frame or chassis terminal

Terminal is at earth potential. Used for measurement and control circuits designed to be operated with one terminal at earth potential.

Switch setting indicator. O = Off, | = On.

2-6 E6198B/E6218A Switch/Load Unit User Manual

Safety and Regulatory Information 2

Table 2-2 Safety Symbols and Regulatory Markings (continued)

Symbols Description

Standby (supply); units with this symbol are not completely disconnected from ac mains when this switch is off. To completely disconnect the unit from ac mains, either disconnect the power cord, or have a qualified electrician install an external switch.

Regulatory markings

This text indicates that the ISM device complies with Canadian ICES-001.

Cet appareil ISM est conforme à la norme NMB-001 du Canada.

The CSA mark is a registered trademark of the Canadian Standards Association. A CSA mark with the indicators “C” and “US” means that the product is certified for both the U.S. and Canadian markets, to the applicable American and Canadian standards.

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.

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.

E6198B/E6218A Switch/Load Unit User Manual 2-7

2 Safety and Regulatory Information

End of Life: Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC

This product complies with the WEEE Directive (2002/96/EC) marking 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 a “Monitoring and Control Instrumentation” product.

Do not dispose in domestic household waste

To return unwanted products, contact your local Agilent office, or see:

http://www.agilent.com/environment/product

for more information.

2-8 E6198B/E6218A Switch/Load Unit User Manual

Agilent TS-5000 E6198B Switch/Load Unit User Manual

3 Switch/Load Unit and Plug-In Cards

E6198B Standalone/Integrated Switch/Load Unit Rating 3-2 E6198B Standalone Switch/Load Unit Description 3-3 E6198B Integrated Switch/Load Unit Description 3-9 Backplane And Breakout Board Connectors and LEDs 3-10 Differentiating E6198B Standalone Option and System Integrated

Option 3-22

This chapter gives an overview of the Agilent E6198B (Standalone and Integrated) Switch/Load Unit (SLU), load cards, and other associated equipment.

Agilent Technologies

3-1

3 Switch/Load Unit and Plug-In Cards

E6198B Standalone/Integrated Switch/Load Unit Rating

Electrical

Tab le 3- 1 Switch/Load Unit Rating (Electrical)

Parameter Value

Input Voltage 100–240 VAC nominal

Frequency 50/60 Hz

Power 325 W maximum

Mechanical

Tab le 3- 2 Switch/Load Unit Rating (Mechanical)

Parameter Value

Width 484.64 mm

Height 373.61 mm

Depth 520.52 mm

Weight 15.0 kg

3-2 E6198B/E6218A Switch/Load Unit User Manual

Switch/Load Unit and Plug-In Cards 3

E6198B Standalone Switch/Load Unit Description

The Switch/Load Unit (Figure 3-1) consists of a standard VME type enclosure, a custom high current backplane, and slots for up to 21 optional Agilent plug-in cards. The following plug-in cards are available:

• Agilent E6175A 8-channel load card

• Agilent E6176A 16-channel load card

• Agilent E6177A 24-channel load card

• Agilent U7177A 24-channel load card with current sense

• Agilent E6178B 8-channel heavy duty load card

• Agilent N9377A 16-channel dual-load load card

• Agilent N9378A 24-channel low resistance load card

• Agilent N9379A 48-channel high-density load card

• Agilent E8792A 32-pin matrix card with instrumentation

support

• Agilent E8793A 32-pin matrix card

• Agilent E8782A 40-pin matrix card with 24 instrumentation

support

• Agilent E8783A 64-pin matrix card

• Agilent E8794A custom card

• Agilent U7178A 8-channel heavy duty load card

• Agilent U7179A 16-channel high current load card

Load cards are described in detail in Chapter 5 and Appendix A to Appendix C of this manual. The pin matrix cards are described in Chapter 6. The E8794A custom card is discussed in

Chapter 7.

E6198B/E6218A Switch/Load Unit User Manual 3-3

3 Switch/Load Unit and Plug-In Cards

Figure 3-1 Agilent E6198B Standalone Switch/Load Unit Front View

Figure 3-2 Agilent E6198B Standalone Switch/Load Unit Back View

3-4 E6198B/E6218A Switch/Load Unit User Manual

USB Interface

Switch/Load Unit and Plug-In Cards 3

In addition to holding load cards, pin matrix cards, and custom cards, the Switch/Load Unit also provides the following capabilities:

• Built-in USB interface

• Digital I/O

• Current Sense

• Power Bus Sense

• Two DAC Channels

• +5, +12V, –12V, and Spare Power

Each of the above features is described in detail in the following sections.

The Switch/Load Unit switching and data transfer is controlled by a built-in USB interface. Figure 4-13 shows the location of the USB interface.

Digital I/O

Digital Input

The Switch/Load Unit provides 8-bits of digital input, 8-bits of digital output (Open Drain Out), and 8-bits of TTL-level digital output (Spare Digital Out). There is no handshaking capability in the digital I/O. Typical usage of the digital I/O includes:

• Automation control

• Digital control of circuitry on the Agilent E8794A Custom

Card

• Digital switches (for example, to indicate door open/closed)

• Actuator control

• Fixture ID

The digital input bits have TTL thresholds (0.55 Vdc for low,

3.0 Vdc for high) and are protected to ±24 Vdc. These includes the Fixture IDs that also use standard TTL inputs, but are not protected to ±24 Vdc. Figure 3-3 is a typical example showing the usage of a digital input bit.

E6198B/E6218A Switch/Load Unit User Manual 3-5

3 Switch/Load Unit and Plug-In Cards

Open Drain Digital Output

Figure 3-3 Digital Input Example

The digital output bits use open drain drive circuitry designed for pull-ups up to +24 Vdc. The output port FET can sink up to 250 mA. Figure 3-4 shows one digital output bit controlling a relay.

Figure 3-4 Digital Output Example

3-6 E6198B/E6218A Switch/Load Unit User Manual

DAC Channels

NOTE

The two 14-bit channels of DAC provide ±16 V at 10 mA each. To provide this voltage swing, a charge pump is used to step-up the ±12 V supply. The DAC channels are typically used for controlling differential input, voltage-controlled power supplies.

+5 Vdc, +12 Vdc, –12 Vdc, Spare Power

+5 V, +12 V, and –12V from the Switch/Load Unit Power Supply. The +5 V supply can deliver 7.5 A to 30 A, +12 V supply can deliver 2.5 A to 12.5 A, and the –12 V supply can deliver 700 mA to 1 A. You can also connect an additional (spare) power supply to the Switch/Load Unit backplane, see “Connecting an

Additional (Spare) Power Supply for details.

Power supplies +5 V, +12 V, and –12 V for E6198B have non-resettable fuses. (Non-resettable fuses need to be replaced, refer to Table 3-11 for fuse ratings.)

Switch/Load Unit and Plug-In Cards 3

Spare supply has resettable fuse. If an overload occurs, the fuse(s) open. To reset the fuse(s), remove power from the Switch/Load Unit for approximately 20 seconds. The fuse(s) reset when power is re-applied.

Current Sense

The Isense+ and Isense– lines sense current on a selected load card channel. They connect to the current sense bus on the SLU backplane. Current sense lines of each channel are multiplexed. Only one channel can connect to the current sense bus at one time.

Power Bus Sense

Power Bus Sense lines 1-4 remotely sense power supplies connected to power buses 1-4. This sensing compensates the losses in the system wiring to ensure that the set voltage is applied to the sense point.

Switch/Load Unit Block Diagram

Figure 3-5 shows a block diagram of the SLU. All plug-in cards

are optional so your system will have a different mix of cards from that shown here. The Test System Interface or Mass Interconnect are also optional — you can also interface directly to the Switch/Load Unit. See Chapter 4 for details.

E6198B/E6218A Switch/Load Unit User Manual 3-7

3 Switch/Load Unit and Plug-In Cards

Load Card #2

Pin Matrix Card #2

Load Card #1

Pin Matrix Card #1

Custom Card

Agilent E6198B Switch/Load Unit

Load Card #n

Pin Matrix Card #n

Digital In, Power Bus Sense ,

Isense

Switch/Load Unit

Circuitry

Digital Out, DAC, +12 V, -12V

Power Bus

Power

Supply #1

Power

Supply #2

Power

Supply #3

An alog B us

Test System Interface or Mass Interconnect

Note : All plug -in car ds are opti onal - -the m ix and numbers of car ds in your system w i l l be di ffer ent than shown here .

To/From

UUT

Figure 3-5 Switch/Load Unit Block Diagram

3-8 E6198B/E6218A Switch/Load Unit User Manual

E6198B Integrated Switch/Load Unit Description

Sense Bussed/Split PB Sense Remote/Local Frame SelectSense Bussed/Split

The Agilent E6198B now comes as a system integrated unit or as a standalone unit. The features and functionality remains the same as the previous E6198A. Differences between the two are in the cabling and function selection panel.

Figure 3-6 E6198B Integrated SLU Back View

Switch/Load Unit and Plug-In Cards 3

E6198B/E6218A Switch/Load Unit User Manual 3-9

3 Switch/Load Unit and Plug-In Cards

BACKPLANE SLU

T4 T8 T9 T1 T5 T10 T11 T2 T6 T12 T13 T3 T7 T14

J102

J101

J803

J801

J802

214

J201

J202J203

J204

J205

J206J207

J208J209

J210J211

J212

J213

J214J215

J216

J217

J218J219

J220

J221

J104

J111 J110

J109

J106 J107

J105 J108

Backplane And Breakout Board Connectors and LEDs

Figure 3-7 Switch/Load Unit Backplane Connectors (USB port adaptor board Not Shown)

3-10 E6198B/E6218A Switch/Load Unit User Manual

Switch/Load Unit and Plug-In Cards 3

BREAKOUT BOARD (External Board)

BACK

J_5

J_6

J_7

J_3

FRONT

J_1

J_8

S3A-S3F

S1A-S1D

S2A-S2H

Figure 3-7 shows the locations of the various backplane

connectors and LEDs. These components are described on the following pages. See Table 3-3 for more detail.

Figure 3-8 Switch/Load Unit Breakout Board Connectors (Standalone

only)

Figure 3-8 shows connector locations on the breakout board

(external board). Refer Table 3-5 for the detailed descriptions.

The breakout panel is available with the E6198B Standalone option and is easily accessible from the SLU rear.

E6198B/E6218A Switch/Load Unit User Manual 3-11

3 Switch/Load Unit and Plug-In Cards

Backplane Connector Name

Table 3-3 lists the connectors on a E6198B backplane.

Tab le 3- 3 Backplane Connectors for E6198B

E6198B Reference

Designator

J2 SLU Current Sense: Bussed/Split

J3 SLU Power Bus Sense Select: Local/Remote

J1 Frame Select

T1-T14 SLU Logic Power Supply Connector

J101 To USB Controller Connector

J102 Utility Connector

J104 External Reset (reserved)

J105 +5 V Indicator (+5 V Status)

J106 +12 V Indicator (+12 V Status)

J107 –12 V Indicator (–12 V Status)

J108 READY Indicator (Control Status)

J109 +12 V Output For Fan

J110 +12 V Output For Fan

J111 +12 V Output For Fan

J201-J221 Load Card Slots Connector

Description

J801 & J802 Power Busses PB1-PB4

J803 Sense For PB1-PB4

3-12 E6198B/E6218A Switch/Load Unit User Manual

Backplane J1, J2 and J3 Connectors

Table 3-4 shows the factory default configuration for the

backplane connectors.

Tab le 3- 4 Backplane Factory Default Connector Settings

Switch/Load Unit and Plug-In Cards 3

Connector

J1 0 (Zero)

J2 Bussed Switch/Load Unit Current-Sense Bus

J3 Local

Default Setting

Description

Frame Select address 0-7. When using multiple

Switch/Load Units in your test system, Connector

J1 provides a unique address for each

Switch/Load Unit. Factory default (one

Switch/Load Unit) is 0.

Switch/Load Unit Power Bus Sense select:

Local/Remote

E6198B/E6218A Switch/Load Unit User Manual 3-13

3 Switch/Load Unit and Plug-In Cards

NOTE

Breakout Board Connector Name (for E6198B Standalone option)

Breakout board extends the connection from backplane to SLU rear. Table 3-5 lists the description of each connector.

Tab le 3- 5 Breakout Board Connectors

Connector Description

J_1 Utility Connector (J102 extension connector)

J_3 Utility Connector (J102 internal connector)

J_5

J_6

J_7

J_8 Spare Supply Connector

S1A-S1D Toggle switches for Local/Remote

S2A-S2H Toggle switches for Frame Select

S3A-S3F Toggle switches for Isense Bussed/Split

The breakout board is not available with E6198B System Integrated

Frame Select & Spare Supply (Connect to J1 of

backplane internal connector)

Power Bus Sense Local/Remote (Connect to J3 of

backplane internal connector)

Isense Bussed/Split (Connect to J2 of backplane

internal connector)

option. See Figure 3-6.

3-14 E6198B/E6218A Switch/Load Unit User Manual

Backplane Connectors

The following connector descriptions are referenced to

Figure 3-9.

T1-T14 are the Switch/Load Unit power supply connectors. The supply provides the required +5 V and ±12 V for powering the backplane and Load Cards. These power supply lines are protected by fuses.

J102 connects the signals that are cabled between the Switch/Load Unit and the mass interconnect. These signals include:

Eight-bit fixture ID pins allow the user to configure a unique ID for each mass interconnect fixture and read it back. Address 0 of the backplane is used for the fixture ID and to read back the status of reset and busy state of the backplane.

Switch/Load Unit and Plug-In Cards 3

Digital In/Digital Out eight bits each (TTL level).

Open Drain Outputs eight bits each.

Four pairs of current sense busses correspond to the

current sense pairs from slots 1-5, 6-10, 11-15, and 16-21. These busses may be connected together to form a single bus, or split into independent current sense busses using jumpers on SLU backplane J2 connector (Integrated) or switches S3A-S3F on breakout board (Standalone). Factory default connects all sense busses to a single bus. Find more information on when should you split the busses and how in

Chapter 3.

Four remote power bus sense pins remotely sense the power busses at the UUT. Remote or local sensing for power bus PB1-PB4 can be set using jumpers on SLU backplane J3 connector or S1A-S1D on breakout board (Standalone). Factory default is remote sense.

DAC 1 and DAC 2 outputs.

J201-J221 are the slot connectors for Pin Matrix Card or

Load Card, slots 1-21 respectively. The top half of each slot connector is used to provide slot power, address, data, and control lines. The bottom half of each connector is used to connect the power busses to the Load Cards.

E6198B/E6218A Switch/Load Unit User Manual 3-15

3 Switch/Load Unit and Plug-In Cards

Backplane LEDs

J801 and J802 provide the high power connections to power busses PB1-PB4. Three supplies with a common connection to PB1 or two independent supplies can be configured on the four power busses. Bulk bypassing between power busses may be desirable in certain applications.

J803 provides the sense connections for the four power busses.

Two sets of LEDs are provided on the backplane for a visual indication that the Switch/Load Unit is functioning:

Power LEDs. The +5V, +12V and –12V LEDs indicate the status of the corresponding voltage lines from the Switch/Load Unit power supply and READY LED indicate the status of SLU ready to operate. If one or more LEDs is NOT illuminated, the most likely problem was an overcurrent situation that opened the non-resettable fuse(s). To change fuse(s), remove power from the Switch/Load Unit for approximately 20 seconds. The fuse(s) will reset when power is re-applied. (Non-resettable fuses need to be replaced rather than power off to reset, refer to Table 3-11 for fuse ratings.)

Frame LEDs. The Frame Access LED flashes to indicate a data access has occurred to that Switch/Load Unit. The five Slot Address LEDs indicate the slot currently being addressed.

J102 Pinouts

Switch/Load Unit backplane connector J102 carries signals such as the Digital I/O, DAC 1 and 2, and ISense (current sense) lines. When configured as part of a standard Agilent system, J102 of the Switch/Load Unit is connected via cable to a mass interconnect panel. User connections to the UUT are then made from the mass interconnect panel. Refer to the appropriate mass interconnect wiring guide for connection details.

You can also make connections directly to J102 or to the exposed end of an Agilent E3750-61607, Agilent E6170-61610, or Agilent E6198-61625 cable connected to J102. Figure 3-9 is a J102 connector pinout and Figure 3-10 shows the pinouts for the exposed cable connector end. Table 3-6 defines the signals available on J102.

3-16 E6198B/E6218A Switch/Load Unit User Manual

Figure 3-9 Switch/Load Unit J102 Connector Pinouts

Open Drain Out (7)

Open Drain Out (5)

Open Drain Out (1)

Open Drain Out (3)

Open Drain Out (6)

Open Drain Out (2)

Open Drain Out (0)

Open Drain Out (4)

DAC2

DAC1

No Connection

System Gnd

Spare Supply

+12 Vdc Supply

Power Bus Sense 4

Power Bus Sense 2

ISense+ (4)

ISense+ (3)

ISense+ (2)

ISense+ (1)

Spare_DigOut (7)

Spare_DigOut (5)

Spare_DigOut (3)

Spare_DigOut (1)

Digital In (7)

Digital In (5)

Digital In (3)

Digital In (1)

System Gnd

Fixture ID (7)

Fixture ID (5)

Fixture ID (3)

Fixture ID (1)

System Gnd System Gnd

Fixture ID (0)

Fixture ID (2)

Fixture ID (4)

Fixture ID (6)

System Gnd

Digital In (0)

Digital In (2)

Digital In (4)

Digital In (6)

Spare_DigOut (0)

Spare_DigOut (6)

Spare_DigOut (4)

Spare_DigOut (2)

ISense- (1)

ISense- (4)

ISense- (3)

ISense- (2)

Power Bus Sense 1

Power Bus Sense 3

System Gnd

No Connection

-12 Vdc Supply

+12 Vdc Supply

93 90

91 888785

84 81

82 79

75 72

73 706967

66 63

64 61

57 54

55 525149

48 45

46 43

39 36

37 343331

30 27

28 25

24 21

22 19

15 12

13 1097

NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

Row 1

Row 2

Row 3

Row 4

Row 5

Row 6

Row 7

Row 8

Row 9

Row 10

Row 11

Row 12

Row 13

Row 14

Row 15

Row 16

Row 17

Row 18

Row 19

Row 20

Row 21

Row 22

Row 23

Row 24

Row 25

Row 26

Row 27

Row 28

Row 29

Row 30

Row 31

Row 32

NOTE

Switch/Load Unit and Plug-In Cards 3

For E6198B Standalone option, connector J102 is extended from the backplane to the breakout board. See Figure 3-8.

E6198B/E6218A Switch/Load Unit User Manual 3-17

6 4

9 7 12 10 15 13 18 16 21 19

27 25 30 28 33 31 36 34 39 37 42 40 45 43

51 49 53 52 57 55 60 58 63 61 66 64 69 67

Open Drain Out (6)

Open Drain Out (2)

Open Drain Out (0)

Open Drain Out (4)

System Gnd Fixture ID (0) Fixture ID (2) Fixture ID (4) Fixture ID (6)

System Gnd

Digital In (0) Digital In (2) Digital In (4) Digital In (6)

Spare_DigOut (0)

Spare_DigOut (6)

Spare_DigOut (4)

Spare_DigOut (2)

ISense- (1)

ISense- (4)

ISense- (3)

ISense- (2)

Power Bus Sense 1 Power Bus Sense 3

System Gnd

No Connection

-12 Vdc Supply

+12 Vdc Supply

Open Drain Out (7)

Open Drain Out (5)

Open Drain Out (1) Open Drain Out (3)

DAC2

DAC1

No Connection

System Gnd

Spare Supply

+12 Vdc Supply

Power Bus Sense 4

Power Bus Sense 2

ISense+ (4)

ISense+ (3)

ISense+ (2)

ISense+ (1)

Spare_DigOut (7)

Spare_DigOut (5)

Spare_DigOut (3)

Spare_DigOut (1)

Digital In (7)

Digital In (5)

Digital In (3)

Digital In (1)

System Gnd

Fixture ID (7)

Fixture ID (5)

Fixture ID (3)

Fixture ID (1)

System Gnd

75 73 78 76 81 79 84 82 87 85 90 88 93 91

24 22

48 46

72 70

96 94

ABC

Cable Connector Endand Front View

(Center Column Not Used)

Row 24

Row 23

Row 21 Row 22

Row 32

Row 31

Row 30

Row 29

Row 28

Row 27

Row 26

Row 25

Row 20

Row 19

Row 18

Row 17

Row 16

Row 15

Row 14

Row 13

Row 12

Row 11

Row 10

Row 9

Row 8

Row 7

Row 6

Row 5

Row 4

Row 3

Row 2

Row 1

3 Switch/Load Unit and Plug-In Cards

Figure 3-10 Cable Connector Pinouts

3-18 E6198B/E6218A Switch/Load Unit User Manual

Tab le 3- 6 J102 signal definitions

Switch/Load Unit and Plug-In Cards 3

+12Vdc, –12Vdc Supply

Spare Supply Connection for a user installed power supply not included in the standard system. Refer

DAC1 DAC2

Digital In 0 - 7 Open Drain Out 0 - 7 Spare_DigOut

Fixture ID (0 - 7) The Fixture ID lets you configure a unique ID for each mass interconnect fixture and

Isense+ (1 - 4) Isense– (1 - 4)

+12V and –12V from the Switch/Load Unit Power Supply. The +12V supply can deliver

12.5A, the –12V supply can deliver 2.1A.

to “Connecting an Additional (Spare) Power Supply" for details.

The Switch/Load Unit provides two 14-bit channels of DAC which supply ±16 V at 10 mA each.

The Switch/Load Unit provides 8-bits of digital input, 8-bits of open drain digital output, and 8-bits of TTL-level digital output (Spare_DigOut). There is no handshaking capability.

read it back. ID sent as TTL level bits.

These lines connect to the current sense bus on the Switch/Load Unit backplane. These lines are used for sensing current on a selected load card channel. The 8-channel and 16-channel load cards are designed to connect to the current sense bus. Each load card channel’s current sense lines are multiplexed so that on each card only one channel at a time can be connected to the current sense bus. The current sense lines and the slots they connect to are:

Isense lines (1) connect to Switch/Load Unit slots 1 - 5. Isense lines (2) connect to Switch/Load Unit slots 6 - 10. Isense lines (3) connect to Switch/Load Unit slots 11 - 15. Isense lines (4) connect to Switch/Load Unit slots 16 - 21.

Two or more sets of the above lines can be bussed together select from toggle switches. Refer to page 12 for details.

Power Bus Sense 1 - 4 The remote sense lines for the power supplies connected to power buses 1 - 4.

Gnd Chassis ground of the Switch/Load Unit.

E6198B/E6218A Switch/Load Unit User Manual 3-19

3 Switch/Load Unit and Plug-In Cards

J1 Pinout

Tab le 3- 7 Switch/Load Unit J1 Pinout

FS1 FS3 FS5 FS7 NC GND SS

FS0 FS2 FS4 FS6 FRAME GND SS

J2 Pinout

Table 3-7 shows pinout of J1 Frame Select & Spare Supply (SS).

Frame 0 is selected if FS0 and FRAME are both are connected; Frame 1 is selected if FS1 and FRAME are both are connected, and so on. Default setting is frame 0 (zero). More detail about SS (Spare Supply), please refer “Connecting an Additional (Spare)

Power Supply" .

Table 3-8 show pinouts of J2 ISENSE Bussed/Split. Default

setting for J2 is ISENSE Bussed.

Tab le 3- 8 Switch/Load Unit J2 Pinout

J3 Pinout

Tab le 3- 9 Switch/Load Unit J3 Pinout

IS(-2) IS(+2) IS(-3) IS(+3) IS(-4) IS(+4) NC

IS(-1) IS(+1) IS(-2) IS(+2) IS(-3) IS(+3) NC

Table 3-9 shows pinouts of Power Bus Sense Local/Remote.

Local 1 is selected if LOC_S1 is connected with PB1; Remote 1 is selected if REM_S1 is connected with PB1, and so on. Default setting for J3 is Local.

LOC_S1 PB2 REM_S2 LOC_S3 PB4 REM_S4 LOC_S1

PB1 REM_S1 LOC_S2 PB3 REM_S3 LOC_S4 PB1

3-20 E6198B/E6218A Switch/Load Unit User Manual

T1-T14 SLU Logic Power Supply Connector

T1-T14 provides the required +5 V and ±12 V for powering the backplane and Load Cards. Table 3-10 lists each jumper and its corresponding input voltage.

Table 3-10 Power Supply Input for each Jumpers

Jumper Input Voltage

T1 +5 V

T2 +5 V

T3 +5 V

T4 –12 V

T5 +12 V

T6 +12 V

T7 +12 V

Switch/Load Unit and Plug-In Cards 3

T8 GND

T9 GND

T10 GND

T11 GND

T12 GND

T13 GND

T14 GND

E6198B/E6218A Switch/Load Unit User Manual 3-21

3 Switch/Load Unit and Plug-In Cards

Differentiating E6198B Standalone Option and System Integrated Option

The key differences between the standalone and system integrated option can be found at the SLU rear cover.

On a standalone unit, the backplane connectors are extended to the breakout board attached to the SLU rear cover. At the SLU rear, you will find toggle switches for SLU configuration, and power and sense buses connectors protected by a cable enclosure. (See Figure 3-11.)

On a system integrated unit, you will find cut-outs on the SLU rear cover to allow cable routing from the SLU backplane. Jumpers are used for SLU configuration.

Figure 3-11 Switch/Load Unit Rear View (Standalone Option)

3-22 E6198B/E6218A Switch/Load Unit User Manual

Figure 3-12 Switch/Load Unit Rear View (System Integrated Option)

Switch/Load Unit and Plug-In Cards 3

E6198B/E6218A Switch/Load Unit User Manual 3-23

3 Switch/Load Unit and Plug-In Cards

Fuse Ratings

Fuses are incorporated inside E6198B Switch/Load Unit. There are 10 fuses and 7 fuses for Standalone SLU and Integrated SLU respectively. Please refer Table 3-11 for more detail.

Table 3-11 Fuses Ratings

Standalone Integrated Description

Fuse1 Fuse1 1 A, –12 V

Fuse2 Fuse2 6 A, +12 V_1

Fuse3 Fuse3 6 A, +12 V_2

Fuse4 Fuse4 Not Used

Fuse5 Fuse5 15 A, +5 V_1

Fuse6 Fuse6 15 A, +5 V_2

Fuse7 Fuse7 Not Used

Fuse8 - 30 A, PB2

Fuse9 - 30 A, PB3

Fuse10 - 30 A, PB4

DC Power Bus Connections

PB1 to PB4 are the DC power bus connections as seen in

Figure 3-11 for the standalone unit. Notice the protective cable

enclosure covering both the power bus cabling and power sense cabling for better protection.

For the integrated unit, there is no protective cable enclosure, and you will need to configure the cabling directly onto the backplane, behind the SLU backcover.

3-24 E6198B/E6218A Switch/Load Unit User Manual

Agilent TS-5000

WARNING

CAUTION

E6198B Switch/Load Unit User Manual

4 Configuring the Switch/Load Unit

Card Location Recommendations 4-2 Connecting an Additional (Spare) Power Supply 4-5 Configuring the Power Busses 4-6 Connecting E6198B to the Computer via USB Interface or Parallel

Port 4-12 Adding a Second Switch/Load Unit 4-13 Load Box Installation 4-14

This chapter shows you how to configure the Switch/Load Unit.

SHOCK HAZARD. Only service-trained personnel who are aware of the hazards involved should install, remove, or configure the Switch/Load Unit or plug-in cards. Before you remove any installed card, disconnect AC power from the mainframe and from other cards that may be connected to the cards.

STATIC ELECTRICITY

Static electricity is a major cause of component failure. To prevent damage to electrical components, observe anti-static techniques whenever installing or removing a card in the Switch/Load Unit or whenever working on a card.

Agilent Technologies

4-1

4 Configuring the Switch/Load Unit

Card Location Recommendations

Slot 1 to 21 of a Switch/Load Unit are identical and able to take any supported Pin Matrix or Load Cards. This sections provides an example on card installation guideline to maintain consistency between test systems. Your test system may use a different guideline that fits your application.

For a single Agilent E6198B Switch/Load Unit installed in the system

Install matrix cards first. Slots 15 through 21 are reserved for the matrix and custom modules. Starting from slot 21 and working down, install matrix modules and custom modules in the following order:

• Agilent Pin Matrix and Instrument Multiplexer Card (E8792A or E8782A)

• Agilent Pin Matrix Card(s) (E8793A and/or E8783A)

• Agilent E8794A Custom Card(s)

Install the load cards using the following rules:

• Agilent N9379A 48-Channel Load Cards

Install any N9379A cards first, starting at slot #1.

• Agilent E6177A 24-Channel Load Cards

Install any E6177A cards next.

• Agilent U7177A 24-Channel Load Cards with Current Sense

Install any U7177A cards next.

• Agilent N9378A 24-Channel Load Cards

Install any N9378A cards next. To allow for future expansion, leave an open slot after the last N9378A card.

• Agilent E6176A 16-Channel Load Cards

Install any Agilent E6176A cards next.

• Agilent N9377A 16-Channel Load Cards

Install any Agilent N9377A cards next. To allow for future expansion, leave an open slot after the last N9377A card.

• Agilent E6178B 8-Channel Heavy Duty Load Cards

Agilent E6178B 8 channel Heavy Duty cards require two slots each. These cards are installed in even slot locations only. Install E6178B cards starting with the first available even slot following the 16 channel cards.

4-2 E6198B/E6218A Switch/Load Unit User Manual

Configuring the Switch/Load Unit 4

CAUTION

Slot:

E8792A 32-Pin

Matrix and Instrument Multiplexer

Card

E6175A

8-Channel

Agilent E6176A 16-Channel Load Cards

N9379A

48-Channel

Switch/Load Unit Slot Front View

Agilent E8794A

Custom Card

Empty

E6177A

24-Channel

Empty

N9378A

24-Channel

Empty

N9378A

24-Channel

Empty

1 2 3

4 5 6

7 8 9

11 12

14 15

17 18 19

20 21

• Agilent E6175A 8-Channel Load Cards

Agilent E6175A 8 channel cards require two slots each. These cards are installed in even slot locations only. Install E6175A cards in first available even slot following the E6178B 8-Channel Heavy Duty cards.

Please close the gap for rear side of the connector if using own fabricated cable with connector.

For example, Figure 4-1 shows the standard locations for matrix and load cards for a system which contains three matrix cards, a custom card, two 24 channel, four 16 channel, one 8 channel, and one 8 channel heavy duty load card. If using this configuration, be sure to leave the slots open between the cards, as shown in the figure.

Figure 4-1 Example of Load/Matrix/Custom Cards Loading Order

E6198B/E6218A Switch/Load Unit User Manual 4-3

4 Configuring the Switch/Load Unit

Load Card Types and IDS

Each card is assigned a different type and has a 10-pin connector that lets you assign a unique binary code ID number to each card. See“Load Card Type and Configuration ID" for more information.

4-4 E6198B/E6218A Switch/Load Unit User Manual

Configuring the Switch/Load Unit 4

C507

100uF

50V

HP 0180-3334

RT505

700m

HP 0837-0440

Raytheon P/N

SMD100 or

equivalent

V+24V

To J102

SS ( +ve Polarity)

Connecting an Additional (Spare) Power Supply

The Spare Supply pinout located at SLU backplane connector J1 (Integrated) allows you to add an additional power supply such as a +24 V power supply for powering higher voltage relays. It is necessary to remove the SLU rear cover to access this connector. Figure 4-2 shows the placement and orientation on the backplane for the power supply components. Both Connector J1 and Capacitor C507 are loaded at the factory. Capacitor C507 is to minimize high-frequency noise on the supply line. The auxiliary supply output (Spare Supply) appears on Switch/Load Unit connector J102 pin 79.

Figure 4-2 Component Location/Schematic for User-Installed External Power Supply

For SLU Standalone option, you can connect to the Spare Supply Input directly from SLU rear. See Figure 4-3.

Figure 4-3 Spare Supply (Input) Connector on SLU rear (SLU standalone)

E6198B/E6218A Switch/Load Unit User Manual 4-5

4 Configuring the Switch/Load Unit

J801 J802

PB1 PB2 PB3 PB4

PC Board Traces

Configuring the Power Busses

The UUT power supplies are connected to the power busses PB1-PB4. Figure 4-4 shows the power bus connectors J801 and J802 located on the Switch/Load Unit backplane for integrated option. These connectors use screw terminations for high current. The J801 connectors are shorted on board, providing a common connection for up to three supplies. Example A and B below show the two most common ways of configuring the power busses.

Figure 4-4 Power Bus Connectors J801 and J802

The following examples A and B show the two most common ways of configuring the power busses.

Example A shows three separate supplies attached to the busses, with all three sharing a common ground on Power Bus 1 (PB1). This is the factory default configuration. The grounds for all three supplies are connected together on connector J801.

4-6 E6198B/E6218A Switch/Load Unit User Manual

Configuring the Switch/Load Unit 4

+5V-12V+12V

PB1

PB2

PB3

PB4

BATT

PB1

PB2

PB3

PB4

UUT

Figure 4-5 Example A: Three Separate Supplies on PB1 - PB4

Example B (available only as a special configuration) shows two isolated power supplies with separate grounds connected to the power bus. This configuration can be used if, for example, one supply requires local sensing, while the other requires remote sensing at the UUT.

Figure 4-6 Example B: Isolated Power Supplies

For the standalone SLU, users can directly connect to the external connector “DC Power Bus Connection”. (See

Figure 4-7.)

E6198B/E6218A Switch/Load Unit User Manual 4-7

4 Configuring the Switch/Load Unit

Power Bus 1

Power Bus 2 Power Bus 3 Power Bus 4

PB Sense 1

PB Sense 2

PB Sense 3

PB Sense 4

Figure 4-7 DC Power Bus Connector Of Standalone SLU

Setting the UUT Power Supply Remote/Local Sense Jumpers

The UUT power supplies can be configured for either remote sense or local sense. In local sense, the voltage across the load equals the power supply voltage less the voltage drop across the cables between the load and power supply. In remote sense, the voltage across the load equals the selected power supply voltage. In this configuration, the power supply automatically increases the voltage output to compensate for the voltage drop across the cables. A conceptional view of both types of sensing is shown in Figure 4-8.

4-8 E6198B/E6218A Switch/Load Unit User Manual

Configuring the Switch/Load Unit 4

Figure 4-8 Conceptional View of Local/Remote Sensing

Set the power supply sense jumpers in the LOCAL position for sensing the power supply outputs at the PB1 - PB4 terminals.

For Standalone, toggle PB Sense Remote/Local switches to select either Remote or Local mode. See Figure 4-9.

E6198B/E6218A Switch/Load Unit User Manual 4-9

4 Configuring the Switch/Load Unit

Figure 4-9 PB Sense Remote/Local Interface (Standalone SLU)

For Integrated, use Jumper to select the mode on PB Sense Remote/Local. See Figure 4-10.

Figure 4-10 PB Sense Remote/Local and Frame Select Interface

(Integrated SLU)

Configuring the Current-Sense Jumpers

The Switch/Load Unit is shipped from the factory with the current-sense jumpers J2 installed in the BUSSED position forming one continuous current-sense bus along the Switch/Load Unit backplane. These three jumpers have been included so that, if necessary, the existing single current-sense bus can be split up into as many as four independent current-sense busses by changing the jumper location to SPLIT. Each independent current-sense bus provides one reading, so up to four simultaneous current-sense readings can be made at a time.

The hardware allows each card to perform current-sense measurements on only one channel at a time. However, it is possible to command two cards sharing a common current-sense bus to attempt simultaneous current-sense readings. This can lead to a power bus to power bus short, causing confused and incorrect readings.

4-10 E6198B/E6218A Switch/Load Unit User Manual

Configuring the Switch/Load Unit 4

NOTE

Figure 4-11 shows the ISense Bussed/Split interface for

Standalone SLU. Toggle the switch to choose either Bussed or Split mode.

Figure 4-11 ISense Bussed/Split Interface (Standalone SLU)

For system integrated SLU, jumpers are used to select between Bussed/Split, see Figure 4-12.

Figure 4-12 ISense Bussed/Split Interface (Integrated SLU)

Ensure Load Cards that will be accessed simultaneously for current-sense readings are located in slots that do not share a common current-sense bus.

E6198B/E6218A Switch/Load Unit User Manual 4-11

4 Configuring the Switch/Load Unit

Connecting E6198B to the Computer via USB Interface or Parallel Port

USB interface is introduced in E6198B, on top of parallel port interface which is available on the older version on SLU. The USB interface connects to the PC controller using a standard USB cable. See Figure 4-13.

Figure 4-13 USB Cable Connections

4-12 E6198B/E6218A Switch/Load Unit User Manual

Adding a Second Switch/Load Unit

You can add a second Switch/Load Unit to the system as the load and switching requirements increase. Connection to the PC controller can be made to any existing USB port or via an externally powered USB hub.

For Standalone SLU, the Frame Select toggle switches, sets the address of each Switch/Load Unit (see Figure 4-14). The toggle switches can be set for any address from zero to seven.

However, for the Integrated SLU, jumpers must be used for frame select. For each system, no two Switch/Load Units can have the same address. The factory default position is Address

0. As an example, you can leave the address of the first Switch/Load Unit set to 0 and set the address of the second Switch/Load Unit to 1.

Configuring the Switch/Load Unit 4

Figure 4-14 Frame Select Interface (Standalone SLU)

E6198B/E6218A Switch/Load Unit User Manual 4-13

4 Configuring the Switch/Load Unit

Load Box Installation

Figure 4-15 Load Box Installed

• Install 4 tinnermans (0590-0804) at the proper locations on the back of the rack.

• From the back of the rack, position the load box onto the rails and secure to the rack using 4 spacers (0380-0317

) and

4 dress screws (0570-1272).

• Spacers are only required for the first loadbox (to clear the door latch).

• Check the build list for the number of load boxes (E6198B) required. If a second load box (Option E6198B-FG) is required, another set of rails will need to be installed. Allow space for the first load box and 1 EIA space for venting between the two load boxes.

• Secure the second loadbox (if required) with 4 dress screws (E9900-06001).

* This is the standard spacer. For E8972 (TS-5400), use 0380-4697 spacers.

4-14 E6198B/E6218A Switch/Load Unit User Manual

Agilent TS-5000 E6198B Switch/Load Unit User Manual

5 Using Load Cards and Loads

Load Card Capabilities 5-2 Loads Overview 5-4 Using the Load Cards 5-5 Using the Agilent E6175A 8-Channel Load Card 5-7 Using the Agilent E6176A 16-Channel Load Card 5-25 Using the Agilent E6177A 24-Channel Load Card 5-38 Using the Agilent U7177A 24-Channel Load Card 5-47 Using the Agilent E6178B 8-Channel Load Card 5-55 Using the Agilent U7178A 8-Channel Heavy Duty Load Card 5-63 Using the Agilent U7179A 16-Channel High Current Load Card 5-71 Using the Agilent N9377A 16-Channel Dual-Load Load Card 5-83 Using the Agilent N9378A 24-Channel Low Resistance Load Card 5-97 Using the Agilent N9379A 48-Channel High-Density Load Card 5-105

This chapter discusses how to configure load cards and how to use loads with the various load cards.

Agilent Technologies

5-1

5 Using Load Cards and Loads

Load Card Capabilities

Tab le 5- 1 Load Card Capabilities

No. of

Function Slot Size

E6175A 2 8 4

E6176A 1 16 16

E6177A 1 24 24 2 A No No No

E6178B 2 8 8 30 A No Yes Yes

N9377A 1 16 dual load 16

N9378A 1 24 dual load 24 2 A No No No

N9379A 1 48 dual load 48 2 A No No No

U7177A 1 24 24 2 A Yes No No

U7178A 2 8 8 40 A No Yes Yes

U7179A 2 16 16 15 A Yes No Yes

Channels

(Max.)

No. of

Channels -

Unshared

Relays

Maximum

Current per

Channel

7.5 A

(15 A peak)

7.5 A

(15 A peak)

7.5 A

(15 A peak)

Current

Measuring

with Sense

Resistor

Yes Ye s Yes

Yes No Yes

Current

Measuring

with Current

Transducer

Flyback

Protection

Available

(User

Installed)

• The Agilent E6175A 8-Channel High Current Load Card, with integral current sensing, is intended to be used with loads mounted on the card. A 9-inch by 4-inch area of sheet metal is open on the front of the card for mounting loads. The card is two slots wide to allow mounting of larger loads.

• The Agilent E6176A 16-Channel High Current Load Card is a single-slot design, requiring externally mounted loads. This load card offers high load density for high current loads where current transducers and bridge drive configuration are not required.

• The Agilent E6177A 24-Channel Medium Current Load Card (for non-inductive loads) is intended to be used with loads mounted on the card. A 9-inch by 4-inch area of sheet metal is open on the front of the card for mounting small loads. This card is one slot wide and capable of up to 2A continuous carry current.

5-2 E6198B/E6218A Switch/Load Unit User Manual

Using Load Cards and Loads 5

• The Agilent U7177A 24-Channel Medium Current Load Card (for non-inductive loads), with integral current sensing, is intended to be used with externally mounted loads. This card is one slot wide and capable of up to 2A continuous carry current.

• The Agilent E6178B 8-Channel Heavy Duty Load Card is designed for very high current applications of up to 30A per channel.

• The N937xA load cards support multiple loads per channel, either dual loads (two loads per channel) or quad loads (four loads per channel).

• The Agilent U7178A 8-Channel Heavy Duty Load Card is designed for very high current applications of up to 40 A per channel.

• The Agilent U7179A 16-Channel High Current Load Card is designed for high current applications, requiring externally mounted loads. This card is capable of up to 15 A continuous carry current.

E6198B/E6218A Switch/Load Unit User Manual 5-3

5 Using Load Cards and Loads

Unit Under Test

V+

GND

Simplified Load Card

Power Bus 1

External Loads and Shorts

Power

Supply

Power Bus 2

Loads Overview

Figure 5-1 shows a conceptual block diagram of a typical load

application having these four main areas:

• Power Supply

• Load Card

• Loads

• Unit Under Test (UUT)

Figure 5-1 Loads/Sources Conceptual Overview

5-4 E6198B/E6218A Switch/Load Unit User Manual

Using the Load Cards

Load Card Type and Configuration ID

Using Load Cards and Loads 5

This section describes how to configure and use the load cards.

Each load card type is assigned a card type number as follows:

Agilent E6175A 8-Channel: Card Type is 1

Agilent E6176A 16-Channel: Card Type is 2

Agilent E6177A 24-Channel: Card Type is 3

Agilent U7177A 24-Channel: Card Type is 24

Agilent E6178B 8-Channel Heavy Duty: Card Type is 4

Agilent N9378A 24-Channel Low Resistance: Card Type is 5

Agilent N9379A 48-Channel High Density: Card Type is 6

Agilent N9377A 16-Channel Dual Load: Card Type is 7

Agilent U7178A 8-Channel Heavy Duty: Card Type is 25

Agilent U7179A 16-Channel High Current: Card Type is 32

Except for the N9378A and N9379A, each load card is equipped with a 10-pin connector to allow assignment of a unique binary code ID number to each card. This is useful for verifying a particular configuration of the cards in the SLU. Refer to

Figure 5-2.

Figure 5-2 Pin Assignments on the Card Configuration Jack

• Pin 1 is used for bit 8 on the N9377A card only

• Pins 2-5 correspond to bits 0-3, respectively

• Pins 7-10 correspond to bits 4-7, respectively

E6198B/E6218A Switch/Load Unit User Manual 5-5

5 Using Load Cards and Loads

• See “Connecting Loads" for more information on addressing loads on the N9378A load card.

• See “Connecting Loads" for more information on addressing loads on the N9379A load card.

The configuration pins are normally high with a 10 KΩ pull-up resistor resident on the load card, producing a value of FF

Grounding selected pins creates binary codes which can be read back through the interface using the

loadCardGetInfo action. See

the TS-5000 System Software User’s Guide for more information.

5-6 E6198B/E6218A Switch/Load Unit User Manual

Using the Agilent E6175A 8-Channel Load Card

The Agilent E6175A 8-channel high-current load card, with current sensing, is intended to be used with loads mounted inside the Switch/Load Unit. This card provides great flexibility, low series resistance, and high current-carrying capability.

Figure 5-3 shows a block diagram of the Agilent E6175A

8-Channel Load Card. The card layout is shown in Figure 5-4.

• The card is two slots wide (4 cm./1.6 inches) to allow mounting of larger loads. Due to its high current capability, it is recommended that you mount it on the left side (slots 1-4) of the Agilent E6198B Switch/Load Unit enclosure, closest to the incoming power buses. “Card Location

Recommendations"

Using Load Cards and Loads 5

• The card type is 01

• The factory default is to load a 0.05Ω, 0.1% Isense resistor in

each channel. If you prefer to use a current transducer, you

must

remove the Isense resistor and add the current

transducer described in “Selecting a Current-Sense Method".

• A nine-inch by four-inch area of sheet metal is left open on the front of the card for mounting loads. You provide the load mounting hardware, drilling holes in the sheet metal as needed. “Connecting Loads".

• Each channel is capable of up to 7.5 amperes continuous carry current or up to 15 amperes with a two percent duty cycle.

• There is a slow blow fuse on each channel to protect the card traces against extended high current operation.

. “Load Card Type and Configuration ID".

E6198B/E6218A Switch/Load Unit User Manual 5-7

5 Using Load Cards and Loads

Figure 5-3 Agilent E6175A 8-Channel High-Current Load Card Block Diagram

5-8 E6198B/E6218A Switch/Load Unit User Manual

Figure 5-4 Agilent E6175A 8-Channel Load Card Layout

Using Load Cards and Loads 5

Selecting a Power Supply Configuration

Each channel pair connects to the power bus via a Form C SPDT (single-pole, double-throw) relay. This relay has an NO (normally-open) and an NC (normally-closed) terminal. Each NO terminal is connected to a pin on J3, and each NC terminal is connected to a pin on J4. Each pin on J3 or J4 can be connected to any of the four power bus lines on J5 via jumper wires. This arrangement allows convenient pull-up or pull-down of the various inputs. It also allows for terminating a UUT load at a different voltage than ground.

E6198B/E6218A Switch/Load Unit User Manual 5-9

5 Using Load Cards and Loads

Selecting a Current-Sense Method

The factory default is to provide two jumper combs, one that ties all the pins on J3 together and one that ties all the pins on J4 together. The NO pins are jumpered to power bus 2, and the NC pins are jumpered to power bus 1. The jumper combs for J3 and J4 can be easily cut to provide bus or pin isolation between the various input/power bus connections. For example, if you use one of the channel pairs in a bridge configuration, you would probably disconnect that channel from the J4 jumper comb to eliminate possible power bus interaction.

There are two ways to measure current on the Agilent E6175A 8-Channel Load Card; using a sense resistor, or using a LA 25-NP current transducer from LEM Inc. relationship between the sense resistor (Rs) and the LEM module current transducer (only one or the other is used, never both).

Figure 5-5 shows the

Sense Resistors

The card comes factory loaded with a 3-watt, 0.05 Ω, 0.1% sense resistor already installed. This is the lowest value sense resistor that can safely be installed. If lower value currents are being measured, requiring a larger resistance value to make the sense voltage readable, then this sense resistor can be replaced by a four-wire resistor of higher value. The sense resistor should suffice for most measurements except those that require that the measurement be isolated from high common-mode voltage transients.

Current Transducers

The load card is designed to accept a LEM current transducer (LEM module) to be inserted in the circuit in place of the current-sense resistor.

* This module was tested with a LEM Model LA25-NP Current Transducer from LEM USA, Inc. 6643 West

Mill Road, Milwaukee, WI, 53218. (414) 353-0711

5-10 E6198B/E6218A Switch/Load Unit User Manual

Figure 5-5 LEM Current Transducer

CAUTION

Using Load Cards and Loads 5

Installing a LEM Current Transducer

Figure 5-6 shows the component location of the current-sense

section of the first two channels on the load card. The location of the components listed in Table 5-2 are silk-screened on the load card's printed circuit board. Installing a current transducer involves both elements of a channel pair. For example, if the LEM module were to be installed across channels 1-2:

1 Remove the 0.05Ω current-sense resistor (R1).

The current-sense resistor must be removed from the Agilent E6175A PC board.

2 Install the LEM module.

3 Install the measuring resistor, R2 (preferably a 100Ω, 0.1%

resistor).

4 Install the shorting jumper from R2 to ground, TP41 to

TP42.

E6198B/E6218A Switch/Load Unit User Manual 5-11

5 Using Load Cards and Loads

NOTE

5 Install two bypass capacitors, C41 and C42, both 0.01 μF.

6 Install the appropriate primary-coil range jumpers. See

Figure 5-7.

Use a wire gauge appropriate for the current through the load.

Figure 5-6 Component Location for Installing LEM Current Transducer Module

5-12 E6198B/E6218A Switch/Load Unit User Manual

Using Load Cards and Loads 5

Figure 5-7 Wiring Options of LEM Model LA25-NP Primary for Various

Current Ranges

Table 5-2 details the components that need to be

installed/replaced for each of the two channel pairs of the Agilent E6175A 8-Channel Load Card.

Tab le 5- 2 Components involved in LEM Module Installation

Channel(s) Isense

Resistor

(Rmvd)

1, 2 R1 R2 TP41 to

3, 4 R3 R4 TP43 to

5, 6 R5 R6 TP45 to

7, 8 R7 R8 TP47 to

Measuring

Resistor

Shorting

Jumper

TP42

TP44

TP46

TP48

Capacitors

(0.01 μf)

C41 and C42 U1 See LEM module

C43 and C44 U2 See LEM module

C45 and C46 U3 See LEM module

C47 and C48 U4 See LEM module

The board was tested with a LEM Model LA25-NP information about the use of this current transducer is available from the manufacturer.

Bypass

LEM

Module

LEM Tap

Connection

Spec. Sheet

. Additional

* This load card was tested with a LEM Model LA25-NP Current Transducer from LEM USA, Inc. 6643 West

Mill Road, Milwaukee, WI, 53218. (414) 353-0711

E6198B/E6218A Switch/Load Unit User Manual 5-13

5 Using Load Cards and Loads

CAUTION

Selecting and Loading Flyback Protection

Coils used as loads may have large flyback voltages which have the potential to damage other electronic components. Generally, the UUTs are equipped with flyback protection, so flyback protection on the load cards is redundant but provides additional back-up protection in case a defective UUT is tested. The system integrator is responsible for ensuring flyback protection devices are installed on the load cards.

The load cards are designed to handle a maximum of 500 V

flyback voltage. Operating the load cards without

peak

flyback protection installed on the appropriate channels, or with flyback voltages in excess of 500 V

, may results in

peak

damage to the load card or SLU.

The Agilent E6175A 8-Channel Load Card comes with provisions for user-installed flyback voltage protection.

Figure 5-9 is a detail of the first channel pair, channels 1 and 2,

on the component locator diagram of the 8-Channel Load Card. It shows the location and polarity orientation for channel 1's (RT1 and RT2) and channel 2's (RT3 and RT4) flyback protection devices. This pattern is repeated for the other three channel pairs.

As an example, in Figure 5-8 Chan1 has two potential input lines connected to the input Form C switch K11. RT1 connects input line J4 and RT2 connects alternate input line J3, to the output of Load1. When a voltage spike occurs on the UUT that exceeds the rating on the flyback device, the device clamps the surge voltage to the device’s predetermined value.

5-14 E6198B/E6218A Switch/Load Unit User Manual

Figure 5-8 8-Channel Load Card Detail - Flyback Protection Circuit

Using Load Cards and Loads 5

The flyback protection devices should be installed with the positive side towards the UUT. On each of the four channel pairs the high (+) side should be located as shown in the component locator diagram, Figure 5-9.

Figure 5-9 Agilent E6175A Flyback Protection Polarity

E6198B/E6218A Switch/Load Unit User Manual 5-15

5 Using Load Cards and Loads

16V

Protection Devices

MOV (Metal Oxide Varistor), or back-to-back zener diodes are recommended for flyback voltage protection.

Refer to

Figure 5-10. Zener Diode, MOV (Metal-Oxide Varistor) or

Transzorb

devices mounted at RTx or RTy (2 required per load

- 1 at NC and 1 at NO) provide current path for the inductive

load flyback. Select the protection device so that it conducts at a voltage higher than the UUT's internal protection. If the device's internal protection fails, then the added external protection conducts to protect the UUT and the load card.

Figure 5-10 Typical Agilent E6175A Load Card Flyback Protection Circuit

Typical small MOV (3mm) axial lead mounted specifications are:

Continuous DC voltage: 220 V Transient energy (10/1000mS) Transient peak current (8/20mS)

†

: 0.90 Joules (watt-seconds)

‡

: 100 Amperes Varistor voltage @ 1.0mA DC: 300 Vdc Max Maximum Clamping Voltage (8/20mS): 450 volts Capacitance: 17 pF

Typical Transzorb

specifications are:

Breakdown voltage: 300 V max at 1mA Reverse Standoff voltage: 250 volts Maximum reverse leakage: 5 mA Maximum peak pulse current: 5 A Maximum Clamping voltage: 400 volts Maximum temperature coefficient: 0.110%/°C

* The card was tested using a General Electric GE MOV II, MA series MOV.

† 10/1000mS refers to a standard pulse of 10mS rise and 1000mS to 50% decay of peak value.

‡ 8/20mS refers to a standard pulse of 8mS rise and 20mS to 50% decay of peak value.

5-16 E6198B/E6218A Switch/Load Unit User Manual

Selecting a Load Fuse

The load fuses used are IEC 5x20 mm, 5-ampere slow-blow. These fuses may be replaced by larger fuses if required by your equipment, but not to exceed 8 amperes. In any event, the maximum fuse rating must not exceed an I

Sample Load Configurations

Four sets of tandem loads, each set sharing a current-sense resistor, may be mounted on the Agilent E6175A Load Card. You may need to drill holes in the sheet metal to attach the loads. On the eight-channel load card, the pairs are labeled 1 through 4 on the PC board silkscreen. For example, the load card could be configured to supply a power source and power ground to a module and measure the total current consumed by the module.

Figure 5-3 shows four other examples of how loads could be

configured.

Using Load Cards and Loads 5

T value of 102-126.

In the NPN Pull-up example #1 (Figure 5-11, top), power switch one (PwrSw1), in its normally-closed state, supplies power to the first load. When the load switch connected to the NPN transistor output driver is closed, the current can be sensed at the external DMM when the corresponding Isense MUX relays are closed. The ground return in this example is assumed to be switched through another load card or connected directly to the UUT.

In the multiplex load example #2 (Figure 5-11, middle), a single load is shared by three load switches and may be configured as either a pull-up or pull-down through jumpers to J3 or J4 to J5. The solder-in jumpers are installed by the system integrator to allow the sharing of a load. The multiplexed load switches may be closed individually or in tandem as required to perform the test.

In the PNP pull-down example #3 (Figure 5-11, middle), power switch three (PwrSw3), in its normally closed state, supplies a switched ground to the PNP transistor. The positive source to the transistor is assumed to be switched through another load card to the UUT.

In bridge load example #4 (Figure 5-11, bottom), both load switches and power switch four (PwrSw4) through the bridge configuration jumper J7, provide a sensed current path for pin-to-pin loads on the UUT. Each channel pair (1-4) is shown

* The I2T figure is an industry standard term. If, for example, a fuse with a rating of I2T = 100 experiences a

current surge of 10A, it can maintain that current for 1 second before its capacity is exceeded. (10A * 10A * 1 Second = 100)

E6198B/E6218A Switch/Load Unit User Manual 5-17

5 Using Load Cards and Loads

Load

Switches

UUT

Loads

Load

Sheet Metal

Mounted

Loads

ISense- *1

ISense+ *2

PwrSw1

J6-1

Flyback Protection

Mother Board

Interface

Relay Timer

Relay Slot

Decode Logic

Configuration Connector

Current Sense

Control

Address

Data

Power

+5, ±12V

PB1

PB2

PB3

PB4

PS #1

PS #2

PS #3

Load

ISense- *1

ISense+ *2

PwrSw3

J1 odd # rows

Flyback Protection

J1 even # rows

GPIB

Load

ISense- *1

ISense+ *2

PwrSw2

J6-2

Flyback Protection

J7-3

Load

ISense- *1

ISense+ *2

PwrSw4

J7-4

Flyback Protection

Example

NPN Pull-up Example #1

PNP Pull-down

Example #3

Bridge Load

Example #4

Multiple

Loads

Example #4

Solder-In

Jumpers

*1 are connected together

*2 are also connected together

by J6-1, J6-2, J7-3 and J7-4. Both the power source and return are assumed to be switched through another load card to the UUT.

Figure 5-11 Agilent E6175A Load Examples

5-18 E6198B/E6218A Switch/Load Unit User Manual

Using Load Cards and Loads 5

Setting up a Bridge Configuration

In the bridge configuration the power bus power supplies are not used. The power for the bridge is supplied by the module; the connection to the UUT power supply is effectively bypassed. See Figure 5-12.

Figure 5-12 Bridge Configuration for Channels 7 and 8 on 8-Channel Load Card

Use the following table to determine the appropriate pins on J6 and J7 to jumper to create a bridge circuit on the indicated channels.

E6198B/E6218A Switch/Load Unit User Manual 5-19

5 Using Load Cards and Loads

J1P1

Load Mounting Area

Connecting Loads

Figure 5-13 Agilent E6175A Load Mounting Area and CN1/J1 Connectors

Bridge Circuit on: Jumper Pins:

Channels 1 and 2 J6, 1 and 2

Channels 3 and 4 J6, 3 and 4

Channels 5 and 6 J7, 1 and 2

Channels 7 and 8 J7, 3 and 4

Bridge load flyback protection may be installed to power busses as a normal load if jumpered, or channel to channel by installing protection devices across the bridged channels.

Loads are mounted on the Agilent E6175A’s sheet-metal mounting area. The loads are wired to connector CN1 which mates to the Agilent E6175A’s J1 connector. Figure 5-13 shows the Agilent E6175A’s load mounting area and connectors J1 and CN1.

5-20 E6198B/E6218A Switch/Load Unit User Manual

Load Wiring

CAUTION

Row 16

CN1 Connector

(Wiring Terminal View)

Row 15

Row 14

Row 13

Row 12

Row 11

Row 10

Row 9

Row 8

Row 7

Row 6

Row 5

Row 4

Row 3

Row 2

Row 1

Channel 1

Power 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Channel 8

Power 2

Power 3

Power 4

Power 5

Power 6

Power 7

Power 8

Load 1

Load 2

Load 3

Load 4

Load 5

Load 6

Load 7

Load 8

Load 1

Power 1

15 A

15 C

15 E

Load 2

Power 2

13 A

13 C

13 E

Load 3

Power 3

11 A

11 C

11 E

Load 4

Power 4

9 A

9 C

9 E

Load 5

Power 5

7 A

7 C

7 E

Load 6

Power 6

5 A

5 C

5 E

Load 7

Power 7

3 A

3 C

3 E

Load 8

Power 8

1 A

1 C

1 E

CN1

Odd # RowsEven # Rows

16 C

16 A

16 E

Channel 1

14 C

14 A

14 E

Channel 2

12 C

12 A

12 E

Channel 3

10 C

10 A

10 E

Channel 4

8 C

8 A

8 E

Channel 5

6 C

6 A

6 E

Channel 6

4 C

4 A

4 E

Channel 7

2 C

2 A

2 E

Channel 8

CN1

Figure 5-14 is a simplified schematic and CN1 connector pinout

showing how loads are connected to CN1. Load 1 connects to Channel 1 (CN1 row 16) and Power 1 (CN1 row 15); Load 2 connects to Channel 2 (CN1 row 14) and Power 2 (CN1 row 13), and so on.

To prevent premature pin failure from excessive current flow, when connecting high-current (>3 amp) loads to CN1, wire across all three pins in each row (see Figure 5-15 on page 22).

Figure 5-14 Agilent E6175A Load Wiring Schematic and CN1 Pinouts

Using Load Cards and Loads 5

E6198B/E6218A Switch/Load Unit User Manual 5-21

5 Using Load Cards and Loads

Row 1

Row 16

Load 1

Load 2

Load 7

Load 8

CN1 Connector

(Wiring Terminal View)

Current Sharing

Notice in the wiring schematic (Figure 5-14) that pins A, C and E in each row of J1 are connected together on the PC board. When connecting high-current (>3 amp) loads, wire across all three pins in each row of CN1 (see Figure 5-15). This ensures current sharing across all pins and prevents premature pin failure from excessive current flow.

Figure 5-15 Agilent E6175A Current Sharing Example

5-22 E6198B/E6218A Switch/Load Unit User Manual

UUT Connections

CAUTION

Using Load Cards and Loads 5

When configured as part of a standard Agilent system, CN2 of the load card is typically connected via cables to a mass interconnect panel. User connections to the UUT are then made from the mass interconnect panel. Refer to the appropriate mass interconnect wiring guide for connection details.

You can also make connections directly to CN2. Figure 5-16 is a CN2 connector pinout showing the details. Each even-numbered row of CN2 represents a single load card channel. The three pins in each row are connected together on the PC board for current sharing. When making UUT connections, wire across all three pins in each even-numbered row. This ensures current sharing across all pins and prevents premature pin failure from excessive current flow.

Connecting high-current (>4 amp) loads without wiring across all three pins in the row can cause premature pin failure.

E6198B/E6218A Switch/Load Unit User Manual 5-23

5 Using Load Cards and Loads

*NC = No Connection.

P2 Connector

(Front View)

Channel 8

Channel 7

Channel 6

Channel 5

Channel 4

Channel 3

Channel 2

Channel 1

E11

E13

E15

ACE

Figure 5-16 Agilent E6175A 8-Channel High-Current Load Card UUT Connections

5-24 E6198B/E6218A Switch/Load Unit User Manual

Using the Agilent E6176A 16-Channel Load Card

A block diagram of the Agilent E6176A 16-Channel High-Current Load Card is shown in Figure 5-17. The load card layout is shown in Figure 5-18. The single-slot design offers high load density for high-current loads where current transducers and bridge drive configurations are not required.

• The card is one slot wide. “Card Location Recommendations"

Using Load Cards and Loads 5

• The card type is 02

• The factory default configuration is explained in “Selecting a

Power Supply Configuration".

• The factory default is to load a 0.05Ω, 0.1% Isense resistor in each channel. “Selecting a Current-Sense Resistor Value"

• The flyback protection is connected from both the normally open (NO) and normally closed (NC) power switch connections. “Selecting and Loading Flyback Protection"

• Loads are mounted externally and interface to the card using two load connectors, J1 and J2. “Connecting Loads"

. “Load Card Type and Configuration ID"

E6198B/E6218A Switch/Load Unit User Manual 5-25

5 Using Load Cards and Loads

Figure 5-17 Agilent E6176A 16-Channel High-Current Load Card Block Diagram

5-26 E6198B/E6218A Switch/Load Unit User Manual

Figure 5-18 Agilent E6176A 16-Channel Load Card Layout

Using Load Cards and Loads 5

Selecting a Power Supply Configuration

Each channel connects to the power bus via a Form C SPDT (single pole, double throw) relay. This relay has a NO (normally-open) and a NC (normally-closed) terminal. Each NO terminal is connected to a pin on J4-J7, and each NC terminal is connected to a pin on J8-J11. Each pin on J8-J11 can be connected to any of the four power bus lines on J12 via jumper wires. See Figure 5-27.

The terminal block jumper allows convenient connection of pull-up or pull-down voltages to the various inputs. It also allows for terminating a UUT load at a different voltage than ground. For example, the channel could be connected to +12 volts on one side, and +5 volts on the other.

E6198B/E6218A Switch/Load Unit User Manual 5-27

5 Using Load Cards and Loads

CAUTION

Selecting a Current-Sense Resistor Value

Selecting a Load Fuse

The factory default is to provide two jumper combs, one that ties all the pins on J4-J7 (NO) together and one that ties all the pins on J8-J11 (NC) together. The NO pins are jumpered to power bus 2, and the NC pins are jumpered to power bus 1. The jumper combs for J4-Jll can be easily cut to provide bus or pin isolation between the various input/power bus connections.

The card comes factory loaded with a three watt, 0.05Ω, 0.1% sense resistor already installed. This is the lowest value sense resistor that can be installed safely. If lower value currents are being measured, requiring a larger resistance value to make the sense voltage readable, then replace the sense resistor with a four wire resistor of higher value.

The load fuses used are IEC 5x20 millimeter, 5-amp slow-blow. These fuses may be replaced by fuses with a higher value, but not to exceed 8 amps.

The maximum fuse rating must not exceed an I2T value of

1 The I2T figure is an industry standard term. For example, if a fuse with a rating of I2T =

100 experiences a current surge of 10A, it can maintain that current for 1 second before its capacity is exceeded. (10A * 10A * 1 Second = 100)

102-126.

Selecting and Loading Flyback Protection

Coils used as loads may have large flyback voltages which have the potential to damage other electronic components. Generally the UUTs are equipped with flyback protection, so flyback protection on the load cards is redundant but provides backup protection in case a defective UUT is tested. The system integrator is responsible for ensuring the flyback protection devices are installed on the load cards.

5-28 E6198B/E6218A Switch/Load Unit User Manual

Using Load Cards and Loads 5

CAUTION

The load cards are designed for a maximum of 500 V

peak

flyback voltage. Operating the load cards without flyback protection installed on the appropriate channels, or with flyback voltages in excess of 500 V

, may results in

peak

damage to the load card or SLU.

The Agilent E6176A Load Card comes with provisions for user-installed flyback voltage protection. Figure 5-40 is a detail of the first two channels on the component locator diagram of the load card. It shows the location and polarity orientation for channel 1's (RT1 and RT2) and channel 2's (RT3 and RT4) flyback protection devices when they are installed. This pattern is repeated for the other fourteen channels.

Figure 5-19 16-Channel Load Card - Flyback Device Polarity Orientation

The flyback protection devices function exactly the same as for the 8-Channel Load Card; one flyback protection from the output to the normally open side of the power switch, and one flyback protection from the output to the normally closed side of the power switch.

In Figure 5-41, Channel 1 has two input lines connected to the input Form C switch. RT1 connects input line J4-J7, and RT2 connects alternate input line J8-J11, to the output of Load1. When a voltage spike occurs on the UUT that exceeds the rating on the flyback device, the device clamps the surge voltage to the devices predetermined value. The flyback protection is installed similarly on each input line.

E6198B/E6218A Switch/Load Unit User Manual 5-29

5 Using Load Cards and Loads

Figure 5-20 16-Channel Load Card - Flyback Circuit Detail

The flyback protection devices should be installed with the positive side towards the UUT. On each of the 16 channels the high (+) side should be located as shown in the component locator diagram, Figure 5-41. MOV (Metal Oxide Varistor), or back-to-back zener diodes are recommended for flyback voltage protection.

Protection Devices

Zener Diodes, MOVs (Metal-Oxide Varistor) or Transzorbs® devices mounted at RTx or RTy (2 required per load - 1 at NC and 1 at NO) provide current path for the inductive load flyback. Select the protection device so that it conducts at a voltage higher than the UUT's internal protection. If the device's internal protection fails, then the added external protection conducts to protect the UUT and the load card.

* The card was tested using a General Electric GE MOV II, MA series MOV

5-30 E6198B/E6218A Switch/Load Unit User Manual

Using Load Cards and Loads 5

16V

Figure 5-21 Typical Agilent E6176A Load Card Flyback Protection Circuit

Typical small MOV (3mm) axial lead mounted specifications are:

Continuous DC voltage: 220 V

Transient energy (10/1000mS Transient peak current (8/20mS

): 0.90 Joules (watt-seconds)

†

): 100 Amperes Varistor voltage @ 1.0mA DC: 300 Vdc Max Maximum Clamping Voltage (8/20mS): 450 volts Capacitance: 17 pF

Typical Transzorb

specifications are:

Breakdown voltage: 300V max at 1mA Reverse Standoff voltage: 250 volts Maximum reverse leakage: 5mA Maximum peak pulse current: 5A Maximum Clamping voltage: 400 volts Maximum temperature coefficient: 0.110%/°C

* 10/1000mS refers to a standard pulse of 10mS rise and 1000mS to 50% decay of peak value.

† 8/20mS refers to a standard pulse of 8mS rise and 20mS to 50% decay of peak value.

E6198B/E6218A Switch/Load Unit User Manual 5-31

5 Using Load Cards and Loads

CN1, Mating

Connector

for J 1

CN2,

Mating

Connector

for J 2

CAUTION

Connecting Loads

Figure 5-22 Agilent E6176A Connectors J1/J2 and Mating Connectors CN1/CN2

Loads are mounted externally and connected to the load card via wires or cables. The loads are wired to connectors CN1 and CN2 which mate to the Agilent E6176A’s J1 and J2 connectors, respectively. Figure 5-13 shows these connectors.

Load Wiring

Figure 5-23 is a simplified schematic and connector pinouts

showing how loads are connected to CN1/CN2. Loads 1 through 8 connect to CN1 and loads 9 through 16 connect to CN2.

To prevent premature pin failure from excessive current flow, when connecting high-current (>3 amp) loads to CN1, wire across all three pins in each row (see Figure 5-24

on page 34).

5-32 E6198B/E6218A Switch/Load Unit User Manual

Row 16

CN1 Connect or

(Wiring Terminal View )

Row 15

Row 14

Row 13

Row 12

Row 11

Row 10

Row 9

Row 8

Row 7

Row 6

Row 5

Row 4

Row 3

Row 2

Row 1

Channel 1

Power 1

Channel 2

Channel 3

Channel 4

Channel 5

Channel 6

Channel 7

Channel 8

Power 2

Power 3

Power 4

Power 5

Power 6

Power 7

Power 8

Load 1

Load 2

Load 3

Load 4

Load 5

Load 6

Load 7

Load 8

Load 1

Powe r 1

15 A 15 C

15 E

Load 2

Powe r 2

13 A 13 C

13 E

Load 3

Powe r 3

11 A 11 C

11 E

Load 4

Powe r 4

9 A 9 C

9 E

Load 5

Powe r 5

7 A

7 C

7 E

Load 6

Powe r 6

5 A 5 C

5 E

Load 7

Powe r 7

3 A 3 C

3 E

Load 8

Powe r 8

1 A

1 C

1 E

J1CN1

Odd # RowsEven # Row s

16 C

16 A

16 E

Channel 1

14 C

14 A

14 E

Channel 2

12 C

12 A

12 E

Channel 3

10 C

10 A

10 E

Channel 4

8 C

8 A

8 E

Channel 5

6 C

6 A

6 E

Channel 6

4 C

4 A

4 E

Channel 7

2 C

2 A

2 E

Channel 8

CN1

Row 16

CN2 Connect or

(Wiring Terminal View )

Row 15

Row 14

Row 13

Row 12

Row 11

Row 10

Row 9

Row 8

Row 7

Row 6

Row 5

Row 4

Row 3

Row 2

Row 1

Channel 9

Power 9

Channel 10

Channel 11

Channel 12

Channel 13

Channel 14

Channel 15

Channel 16

Power 10

Power 11

Power 12

Power 13

Power 14

Power 15

Power 16

Load 9

Load 10

Load 11

Load 12

Load 13

Load 14

Load 15

Load 16

Load 9

Powe r 9

15 A 15 C

15 E

Load

Powe r 10

13 A 13 C

13 E

Load

Powe r 11

11 A 11 C

11 E

Load

Powe r 12

9 A 9 C

9 E

Load

Powe r 13

7 A 7 C

7 E

Load

Powe r 14

5 A 5 C

5 E

Load

Powe r 15

3 A 3 C

3 E

Load

Powe r 16

1 A 1 C

1 E

J1CN2

Odd # RowsEven # Row s

16 C

16 A

16 E

Channel 9

14 C

14 A

14 E

Channel 10

12 C

12 A

12 E

Channel 11

10 C

10 A

10 E

Channel 12

8 C

8 A

8 E

Channel 13

6 C

6 A

6 E

Channel 14

4 C

4 A

4 E

Channel 15

2 C

2 A

2 E

Channel 16

CN2

Using Load Cards and Loads 5

Figure 5-23 Agilent E6176A Load Wiring Schematic and CN1/CN2 Pinouts

E6198B/E6218A Switch/Load Unit User Manual 5-33

5 Using Load Cards and Loads

CAUTION

Load 9

Load 10

Load 15

Load 16

CN2 Connector

(Wiring Terminal View)

Load 1

Load 2

Load 7

Load 8

CN1 Connector

(Wiring Terminal View)

Row 1

Row

Row 1

Row

Current Sharing

Notice in the wiring schematic (Figure 5-23) that pins A, C and E in each row of J1/J2 are connected together on the PC board. When connecting high-current (>3 amp) loads, wire across all three pins in each row of CN1/CN2 (see Figure 5-24). This ensures current sharing across all pins and prevents premature pin failure from excessive current flow.

Connecting high-current (>4 amp) loads without wiring across all three pins in the row can cause premature pin failure.

Figure 5-24 Agilent E6176A Current Sharing Example

5-34 E6198B/E6218A Switch/Load Unit User Manual

HP 5000 schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Legal Information 1-2

Legal Information

Warranty

Technology Licenses

Restricted Rights Legend

Service and Support

Agilent on the Web

Agilent By Phone

Manufacturing Address

Declaration of Conformity

Safety Information

Safety Summary

Safety Notice

General Safety Information

Environmental Conditions

Before Applying Power

Ground the System

Fuses

Operator Safety Information

Safety Symbols and Regulatory Markings

End of Life: Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC

E6198B Standalone/Integrated Switch/Load Unit Rating

Electrical

Mechanical

E6198B Standalone Switch/Load Unit Description

Figure 3-1 Agilent E6198B Standalone Switch/Load Unit Front View

Figure 3-2 Agilent E6198B Standalone Switch/Load Unit Back View

USB Interface

Digital I/O

Digital Input

Open Drain Digital Output

Figure 3-3 Digital Input Example

Figure 3-4 Digital Output Example

DAC Channels

+5 Vdc, +12 Vdc, –12 Vdc, Spare Power

Current Sense

Power Bus Sense

Switch/Load Unit Block Diagram

Figure 3-5 Switch/Load Unit Block Diagram

E6198B Integrated Switch/Load Unit Description

Figure 3-6 E6198B Integrated SLU Back View

Backplane And Breakout Board Connectors and LEDs

Figure 3-7 Switch/Load Unit Backplane Connectors (USB port adaptor board Not Shown)

Backplane Connector Name

Backplane J1, J2 and J3 Connectors

Breakout Board Connector Name (for E6198B Standalone option)

Backplane Connectors

Backplane LEDs

J102 Pinouts

Figure 3-9 Switch/Load Unit J102 Connector Pinouts

Figure 3-10 Cable Connector Pinouts

J1 Pinout

J2 Pinout

J3 Pinout

T1-T14 SLU Logic Power Supply Connector

Differentiating E6198B Standalone Option and System Integrated Option

Figure 3-11 Switch/Load Unit Rear View (Standalone Option)

Figure 3-12 Switch/Load Unit Rear View (System Integrated Option)

Fuse Ratings

DC Power Bus Connections

Card Location Recommendations

For a single Agilent E6198B Switch/Load Unit installed in the system

Load Card Types and IDS

Connecting an Additional (Spare) Power Supply

Configuring the Power Busses

Setting the UUT Power Supply Remote/Local Sense Jumpers

Configuring the Current-Sense Jumpers

Connecting E6198B to the Computer via USB Interface or Parallel Port

Adding a Second Switch/Load Unit

Load Box Installation

Load Card Capabilities

Loads Overview

Figure 5-1 Loads/Sources Conceptual Overview

Using the Load Cards

Load Card Type and Configuration ID