Keithley Keithley Instruments 7036 Manual

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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

nstruction Manua

Model 7036

40-Channel Single-Pol

Relay Switch Card

Contains Operating and Servicing Information

7036-901-01 Rev. A / 4-97

WARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of
shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries,
diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will
be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs
will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the origi­nal warranty period, or at least 90 days.

LIMITATION OF W

ARRANTY

This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or misuse of
any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or
problems arising from normal wear or failure to follow instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED HEREIN ARE
BUYER’S SOLE AND EXCLUSIVE REMEDIES.

NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT, INDI­RECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND
SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF
SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL
AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.

CHINA: Keithley Instruments China • Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-62022886 • Fax: [phone]
FRANCE: Keithley Instruments SARL • BP 60 • 3 Allée des Garays • 91122 Palaiseau Cédex • 33-1-60-11-51-55 • Fax: [phone]
GERMANY: Keithley Instruments GmbH • Landsberger Strasse 65 • D-82110 Germering, Munich • 49-89-8493070 • Fax: [phone]
GREAT BRITAIN: Keithley Instruments, Ltd. • The Minster • 58 Portman Road • Reading, Berkshire RG30 1EA • 44-118-9575666 • Fax: [phone]
ITALY: Keithley Instruments SRL • Viale S. Gimignano 38 • 20146 Milano • 39-2-48303008 • Fax: [phone]
NETHERLANDS: Keithley Instruments BV • Avelingen West 49 • 4202 MS Gorinchem • 31-(0)183-635333 • Fax: [phone]
SWITZERLAND: Keithley Instruments SA • Kriesbachstrasse 4 • 8600 Dübendorf • 41-1-8219444 • Fax: [phone]
TAIWAN: Keithley Instruments Taiwan • 1FL., 1, Min Yu First Street • Hsinchu, Taiwan, R.O.C. • 886-35-778462 • Fax: [phone]

Model 7036 40-Channel Single-Pole Relay Switch Card

Instruction Manual

©1997, Keithley Instruments, Inc.

All rights reserved.
Cleveland, Ohio, U.S.A.
First Printing, April 1997

Document Number: 7036-901-01 Rev. A

Manual Print History

The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision
Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revi­sions, contain important change information that the user should incorporate immediately into the manual. Addenda are num­bered sequentially. When a new Revision is created, all Addenda associated with the previous Revision of the manual are
incorporated into the new Revision of the manual. Each new Revision includes a revised copy of this print history page.

Revision A (Document Number 7036-901-01)....................................................................................... April 1997

All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.

Other brand and product names are trademarks or registered trademarks of their respective holders.

Safety Precautions

The following safety precautions should be observed before using
this product and any associated instrumentation. Although some in­struments and accessories would normally be used with non-haz­ardous voltages, there are situations where hazardous conditions
may be present.

This product is intended for use by qualified personnel who recog­nize shock hazards and are familiar with the safety precautions re­quired to avoid possible injury. Read the operating information
carefully before using the product.

The types of product users are:

Responsible body is the individual or group responsible for the use

and maintenance of equipment, and for ensuring that operators are
adequately trained.

Operators use the product for its intended function. They must be

trained in electrical safety procedures and proper use of the instru­ment. They must be protected from electric shock and contact with
hazardous live circuits.

Maintenance personnel perform routine procedures on the product

to keep it operating, for example, setting the line voltage or replac­ing consumable materials. Maintenance procedures are described in
the manual. The procedures explicitly state if the operator may per­form them. Otherwise, they should be performed only by service
personnel.

Service personnel are trained to work on live circuits, and perform

safe installations and repairs of products. Only properly trained ser­vice personnel may perform installation and service procedures.

Exercise extreme caution when a shock hazard is present. Lethal
voltage may be present on cable connector jacks or test fixtures.The
American National Standards Institute (ANSI) states that a shock
hazard exists when voltage levels greater than 30V RMS, 42.4V
peak, or 60VDC are present.

pect that hazardous voltage is present in any un­known circuit before measuring.

A good safety practice is to ex-

Users of this product must be protected from electric shock at all
times. The responsible body must ensure that users are prevented
access and/or insulated from every connection point. In some cases,
connections must be exposed to potential human contact. Product
users in these circumstances must be trained to protect themselves
from the risk of electric shock. If the circuit is capable of operating
at or above 1000 volts,

exposed.

As described in the International Electrotechnical Commission
(IEC) Standard IEC 664, digital multimeter measuring circuits
(e.g., Keithley Models 175A, 199, 2000, 2001, 2002, and 2010)
measuring circuits are Installation Category II. All other instru­ments’ signal terminals are Installation Category I and must not be
connected to mains.

Do not connect switching cards directly to unlimited power circuits.
They are intended to be used with impedance limited sources.
NEVER connect switching cards directly to AC mains. When con­necting sources to switching cards, install protective devices to lim­it fault current and voltage to the card.

Before operating an instrument, make sure the line cord is connect­ed to a properly grounded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible wear, cracks, or breaks
before each use.

For maximum safety, do not touch the product, test cables, or any
other instruments while power is applied to the circuit under test.
ALWAYS remove power from the entire test system and discharge
any capacitors before: connecting or disconnecting cables or jump­ers, installing or removing switching cards, or making internal
changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the
common side of the circuit under test or power line (earth) ground.
Always make measurements with dry hands while standing on a
dry, insulated surface capable of withstanding the voltage being
measured.

no conductive part of the circuit may be

Do not exceed the maximum signal levels of the instruments and ac­cessories, as defined in the specifications and operating informa­tion, and as shown on the instrument or test fixture panels, or
switching card.

When fuses are used in a product, replace with same type and rating
for continued protection against fire hazard

Chassis connections must only be used as shield connections for
measuring circuits, NOT as safety earth ground connections.

If you are using a test fixture, keep the lid closed while power is ap­plied to the device under test. Safe operation requires the use of a
lid interlock.

If a screw is present, connect it to safety earth ground using the
wire recommended in the user documentation.

!

The symbol on an instrument indicates that the user should re­fer to the operating instructions located in the manual.

The symbol on an instrument shows that it can source or mea­sure 1000 volts or more, including the combined effect of normal
and common mode voltages. Use standard safety precautions to
avoid personal contact with these voltages.

The

WARNING heading in a manual explains dangers that might

result in personal injury or death. Always read the associated infor­mation very carefully before performing the indicated procedure.

Instrumentation and accessories shall not be connected to humans.

Before performing any maintenance, disconnect the line cord and
all test cables.

To maintain protection from electric shock and fire, replacement
components in mains circuits, including the power transformer, test
leads, and input jacks, must be purchased from Keithley Instru­ments. Standard fuses, with applicable national safety approvals,
may be used if the rating and type are the same. Other components
that are not safety related may be purchased from other suppliers as
long as they are equivalent to the original component. (Note that se­lected parts should be purchased only through Keithley Instruments
to maintain accuracy and functionality of the product.) If you are
unsure about the applicability of a replacement component, call a
Keithley Instruments office for information

To clean the instrument, use a damp cloth or mild, water based
cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill
on the instrument.

The

CAUTION heading in a manual explains hazards that could

damage the instrument. Such damage may invalidate the warranty.

MODEL 7036 SPECIFICATIONS

RELAY SWITCH CONFIGURATION: 40 independent channels of

1-pole switching.

CONTACT CONFIGURATION: 1 pole Form A.
CONNECTOR TYPE: 96-pin male DIN card connector.
MAXIMUM SIGNAL LEVEL: 60VDC, 30V rms, 42V peak betwen any

two inputs or chassis, 1A switched. 30VA (resistive load).

CONTACT LIFE:

Cold Switching: 108closures.

At Maximum Signal Levels: 105closures.
CHANNEL RESISTANCE (per conductor): <1Ω.
CONTACT POTENTIAL: <4µV per contact.
OFFSET CURRENT: <100pA.
ACTUATION TIME: 3ms.
ISOLATION:

Channel to Channel: >109Ω, <25pF.

Common Mode: >109Ω, <100pF.
CROSSTALK (1MHz,50Ω Load): <–40dB.
INSERTION LOSS (50Ω Source, 50Ω Load): <0.3dB below 1MHz,

<3dB below 10MHz.

RELAY DRIVE CURRENT (per relay): 16mA.
EMC: Conforms with European Union Directive 89/336/EEC

EN 55011, EN 50082-1, EN 61000-3-2 and 61000-3-3, FCC part 15

class B.
SAFETY: Conforms with European Union Directive 73/23/EEC

EN 61010-1, UL 3111-1.

ENVIRONMENT: Operating: 0° to 50°C, up to 35°C at <80% R.H.

Storage: –25°C to 65°C.

Specifications are subject to change without notice.

Each Channel

IN

OUT

Table of Contents

1 General Information

Introduction.......................................................................................................................................................... 1-1

Features ............................................................................................................................................................... 1-1

Warranty information.......................................................................................................................................... 1-1

Manual addenda .................................................................................................................................................. 1-2

Safety symbols and terms ................................................................................................................................... 1-2

Specifications ...................................................................................................................................................... 1-2

Unpacking and inspection................................................................................................................................... 1-2

Inspection for damage................................................................................................................................. 1-2

Shipping contents........................................................................................................................................ 1-2

Instruction manual....................................................................................................................................... 1-3

Repacking for shipment ...................................................................................................................................... 1-3

Optional accessories............................................................................................................................................ 1-3

2 Relay Switching Basics

Introduction......................................................................................................................................................... 2-1

Basic switch configuration (SPST) ..................................................................................................................... 2-1

3 Card Connections and Installation

Introduction......................................................................................................................................................... 3-1

Handling precautions .......................................................................................................................................... 3-1

Multi-pin (mass termination) connections .......................................................................................................... 3-2

Typical connection technique ..................................................................................................................... 3-4

Typical connection scheme......................................................................................................................... 3-6

Model 7036 installation and removal.................................................................................................................. 3-7

Switch card installation............................................................................................................................... 3-7

Switch card removal.................................................................................................................................... 3-7

i

4 Operation

Introduction ......................................................................................................................................................... 4-1

Power limits......................................................................................................................................................... 4-1

Maximum signal levels................................................................................................................................ 4-1

Reactive loads.............................................................................................................................................. 4-1

Mainframe control of relay card.......................................................................................................................... 4-2

Channel assignments ................................................................................................................................... 4-3

Front panel control ...................................................................................................................................... 4-5

IEEE-488 bus operation .............................................................................................................................. 4-6

Measurement considerations ............................................................................................................................... 4-7

Path isolation ............................................................................................................................................... 4-7

Magnetic fields ............................................................................................................................................ 4-7

Radio frequency interference ...................................................................................................................... 4-8

Ground loops ............................................................................................................................................... 4-8

Keeping connectors clean............................................................................................................................ 4-9

AC frequency response................................................................................................................................ 4-9

5 Service Information

Introduction ......................................................................................................................................................... 5-1

Handling and cleaning precautions ..................................................................................................................... 5-1

Performance verification ..................................................................................................................................... 5-2

Environmental conditions............................................................................................................................ 5-2

Recommended equipment ........................................................................................................................... 5-2

Switch card connections .............................................................................................................................. 5-2

Channel resistance tests............................................................................................................................... 5-3

Offset current tests....................................................................................................................................... 5-4

Contact potential tests.................................................................................................................................. 5-5

Channel to channel isolation tests ............................................................................................................... 5-5

Common-mode isolation tests ..................................................................................................................... 5-8

Special handling of static-sensitive devices ........................................................................................................ 5-9

Principles of operation......................................................................................................................................... 5-9

Block diagram ............................................................................................................................................. 5-9

ID data circuits .......................................................................................................................................... 5-10

Relay control ............................................................................................................................................. 5-10

Relay power control .................................................................................................................................. 5-10

Power-on safeguard ................................................................................................................................... 5-11

Troubleshooting................................................................................................................................................. 5-11

Troubleshooting equipment....................................................................................................................... 5-11

Troubleshooting access ............................................................................................................................. 5-11

Troubleshooting procedure........................................................................................................................ 5-12

6 Replaceable Parts

Introduction ......................................................................................................................................................... 6-1

Parts lists...............................................................................................................................................................6-1

Ordering information........................................................................................................................................... 6-1

Factory service..................................................................................................................................................... 6-1

Component layouts and schematic diagrams ...................................................................................................... 6-2

Index

ii

List of Illustrations

2 Relay Switching Basics

Figure 2-1 Model 7036 40-channel switch card (simplified schematic) ...................................................................... 2-1

3 Card Connections and Installation

Figure 3-1 Multi-pin connector card terminal identification ........................................................................................ 3-2

Figure 3-2 Typical cable connection technique ............................................................................................................ 3-5

Figure 3-3 Model 7011-KIT-R (cable) assembly ......................................................................................................... 3-5

Figure 3-4 Typical connection scheme for Model 7036 ............................................................................................... 3-6

Figure 3-5 Model 7036 card installation in Model 7001 .............................................................................................. 3-7

4 Operation

Figure 4-1 Limiting inductive reaction voltage ............................................................................................................ 4-2

Figure 4-2 Limiting capacitive reaction current ........................................................................................................... 4-2

Figure 4-3 Model 7001 channel status display (two cards installed)............................................................................ 4-3

Figure 4-4 Model 7002 channel status display (slot 1)................................................................................................. 4-3

Figure 4-5 Display organization for relay card channels.............................................................................................. 4-4

Figure 4-6 Channel assignments ................................................................................................................................... 4-4

Figure 4-7 Path isolation resistance .............................................................................................................................. 4-7

Figure 4-8 Voltage attenuation by path isolation resistance ......................................................................................... 4-7

Figure 4-9 Power line ground loops ............................................................................................................................. 4-8

Figure 4-10 Eliminating ground loops............................................................................................................................ 4-8

5 Service Information

Figure 5-1 Channel resistance testing ........................................................................................................................... 5-3

Figure 5-2 Offset current testing................................................................................................................................... 5-4

Figure 5-3 Contact potential testing.............................................................................................................................. 5-5

Figure 5-4 Channel to channel testing .......................................................................................................................... 5-6

Figure 5-5 Common-mode isolation testing ................................................................................................................. 5-8

Figure 5-6 Model 7036 block diagram ......................................................................................................................... 5-9

Figure 5-7 Start and stop sequences ........................................................................................................................... 5-10

Figure 5-8 Transmit and acknowledge sequence........................................................................................................ 5-10

iii

List of Tables

3 Card Connections and Installation

Table 3-1 Multi-pin connector card terminal designation cross-reference.................................................................. 3-3

Table 3-2 Mass termination accessories...................................................................................................................... 3-4

5 Service Information

Table 5-1 Verification equipment ............................................................................................................................... 5-2

Table 5-2 Channel to channel isolation tests............................................................................................................... 5-7

Table 5-3 Recommended troubleshooting equipment............................................................................................... 5-11

Table 5-4 Troubleshooting procedure ....................................................................................................................... 5-12

6 Replaceable Parts

Table 6-1 Relay card for Model 7036, parts list.......................................................................................................... 6-3

Table 6-2 Mass-terminated connector card for Model 7036, parts list ....................................................................... 6-5

Table 6-3 Model 7011-KIT-R 96-pin Female DIN connector kit................................................................................ 6-7

v

1

General Information

Introduction

This section contains general information about the Model
7036 40-Channel Single-Pole Relay Switch Card.

The Model 7036 switch card consists of a multi-pin (mass
termination) connector card and a relay card. External test
circuit connections to the Model 7036 are made via the 96­pin male DIN connector on the connector card. Keithley
offers an optional Model 7011-MTR bulkhead connector
that can be used to make connections to the connector card.
(See the optional accessories paragraph at the end of this
section.)

The rest of Section 1 is arranged in the following manner:

• Features

• Warranty information

• Manual addenda

• Safety symbols and terms

• Specifications

• Unpacking and inspection

• Repacking for shipment

• Optional accessories

Features

The Model 7036 is a general purpose switch card with 40
independent channels for greater programming fl xibility.
Some of the key features include:

• Low contact potential and offset current for minimal
effects on low-level signals.

• High isolation resistance >1G Ω for minimal load
effects.

• Model 7011-KIT-R connector kit that includes a 96-pin
female DIN connector that will mate directly to the con­nector on the Model 7036 or to a standard 96-pin male
DIN bulkhead connector (see Model 7011-MTR). This
connector uses solder cups for connections to external
circuitry and includes an adapter for a round cable and
the housing.

Warranty information

Warranty information is located on the inside front cover of
this instruction manual. Should your Model 7036 require
warranty service, contact the Keithley representative or
authorized repair facility in your area for further informa­tion. When returning the card for repair, be sure to fill out and
include the service form at the back of this manual in order
to provide the repair facility with the necessary information.

1-1

General Information

Manual addenda

Any improvements or changes concerning the switch card or
manual will be explained in an addendum included with the
card. Addenda are provided in a page-replacement format.
Replace the obsolete pages with the new pages.

Safety symbols and terms

The following symbols and terms may be found on an instru­ment or used in this manual.

!

The symbol on an instrument indicates that the user
should refer to the operating instructions located in the
instruction manual.

The symbol on an instrument shows that high voltage
may be present on the terminal(s). Use standard safety pre­cautions to avoid personal contact with these voltages.

WARNING heading used in this manual explains dan-

The
gers that might result in personal injury or death. Always
read the associated information very carefully before per­forming the indicated procedure.

The CAUTION heading used in this manual explains haz­ards that could damage the switch card. Such damage may
invalidate the warranty.

Specifications

Model 7036 specifications may be found at the front of this
manual. These specifications are exclusive of the
Model 7001/7002 mainframe specifications

Unpacking and inspection

Inspection for damage

The Model 7036 is packaged in a resealable, anti-static bag
to protect it from damage due to static discharge and from
contamination that could degrade its performance. Before
removing the card from the bag, observe the following han­dling precautions.

Handling pr ecautions

1. Always grasp the card by the side edges and shields. Do
not touch the board surfaces or components.

2. When not installed in a Model 7001/7002 mainframe,
keep the card in the anti-static bag and store it in the
original packing carton.

After removing the card from its anti-static bag, inspect it for
any obvious signs of physical damage. Report any such dam­age to the shipping agent immediately.

Shipping contents

The following items are included with every Model 7036
order:

• Model 7036 40-Channel Single-Pole Relay Switch
Card

• Model 7036 Instruction Manual

• Model 7011-KIT-R 96-pin Female DIN Connector Kit

• Additional accessories as ordered

1-2

General Information

Instruction manual

The Model 7036 Instruction Manual is three-hole drilled so
that it can be added to the three-ring binder of the Model
7001 or Model 7002 Instruction Manual. After removing the
plastic wrapping, place the manual in the binder following
the mainframe instruction manual. Note that a manual iden­tification tab is included and should precede the switch card
instruction manual.

If an additional instruction manual is required, order the
manual package, Keithley part number 7036-901-00. The
manual package includes an instruction manual and any per­tinent addenda.

Repacking for shipment

Should it become necessary to return the Model 7036 for
repair, carefully pack the unit in its original packing carton,
or the equivalent, and include the following information:

• Advise as to the warranty status of the switch card.

• Write ATTENTION REPAIR DEPARTMENT on the
shipping label.

• Fill out and include the service form located at the back
of this manual.

Optional accessories

The following accessory is available for use with the Model
7036:

Model 7011-MTR  This 96-pin male DIN bulkhead

connector uses solder cups for connections to external cir­cuitry. It will mate to the Model 7011-KIT-R connector.

1-3

2 -

IN 1

OUT 1

One of 40 Channels

2

Relay Switching Basics

Introduction

This section covers the basic single-pole, single-throw
(SPST) switch configuration

Basic switch configuration (SPST)

A simplified schematic of the Model 7036 switch card is
shown in Figure 2-1. The card consists of 40 independent
channels. Each channel is made up of a single-pole, single­throw (SPST), normally open (NO) switch.

Figure 2-1

Model 7036 40-channel switch card (simplified s hematic)

1

3

Card Connections and Installation

Introduction

WARNING

The procedures in this section are
intended only for qualified ser­vice personnel. Do not perform
these procedures unless qualifie
to do so. Failure to recognize and
observe normal safety precau­tions could result in personal
injury or death.

The information in this section is arranged as follows:

• Handling precautions
that must be followed to prevent contamination to the
switch card. Contamination could degrade the perfor­mance of the card.

Multi-pin (mass termination) connections

•

 Covers the basics for connecting external circuitry to

the connector card.

• Model 7036 installation and removal
vides the procedures to install and remove the Model
7036 switch card from the Model 7001/7002 main­frame.

 Explains precautions

 Pro-

Handling precautions

To maintain high impedance isolation, care should be taken
when handling the card to avoid contamination from such for­eign materials as body oils. Such contamination can substan­tially lower leakage resistances and degrade performance.

To avoid possible contamination, always grasp the relay card
and the connector card by the side edges or shields. Do not
touch the board surfaces or components. On connectors, do
not touch areas adjacent to the electrical contacts. Dirt
buildup over a period of time is another possible source of
contamination. To avoid this problem, operate the mainframe
and switch card in a clean environment.

3-1

Card Connections and Installation

If a card becomes contaminated, it should be thoroughly
cleaned as explained in Section 5.

WARNING

The following connection infor­mation is intended to be used by
qualified service personnel. Fail­ure to recognize and observe
standard safety precautions
could result in personal injury or
death.

3231302928272625242322212019181716151413121110987654321

c
b
a

Figure 3-1

Multi-pin connector card terminal identificatio

Multi-pin (mass termination) connections

Since connections to external circuitry are made at the 96-pin
male DIN bulkhead connector, there is no need to separate
the connector card from the relay card. If the connector card
is separated from the relay card, carefully mate them
together and install the supplied 4-40 screw to secure the
cards. Make sure to handle the cards by the edges and shields
to avoid contamination.

Terminal identification for the DIN connector of the multi­pin connector card is provided by Figure 3-1 and Table 3-1.
This connector will mate to a 96-pin female DIN connector.

View pin side
of connector

3-2

Table 3-1

Multi-pin connector card terminal designation cross-reference

Card Connections and Installation

Schemati

c

Connector

Switch

terminal

IN 1 13a 13 IN 17 24a 24 IN 33 12c 76

OUT 1 14a 14 OUT 17 23a 23 OUT 33 11c 75

IN 2 15a 15 IN 18 26a 26 IN 34 4c 68

OUT 2 16a 16 OUT 18 25a 25 OUT 34 3c 67

IN 3 6a 6 IN 19 28a 28 IN 35 28c 92

OUT 3 7a 7 OUT 19 7b 39 OUT 35 6c 70

IN 4 12a 12 IN 20 17a 17 IN 36 9c 73

OUT 4 11a 11 OUT 20 31c 95 OUT 36 10c 74

IN 5 2a 2 IN 21 23b 55 IN 37 2c 66

OUT 5 3a 3 OUT 21 24b 56 OUT 37 1c 65

IN 6 4a 4 IN 22 25b 57 IN 38 14c 78

OUT 6 5a 5 OUT 22 26b 58 OUT 38 13c 77

IN 7 21a 21 IN 23 17b 49 IN 39 16c 80

OUT 7 18a 18 OUT 23 18b 50 OUT 39 26c 90

IN 8 8a 8 IN 24 19b 51 IN 40 20c 84

OUT 8 10a 10 OUT 24 20b 52 OUT 40 30c 94

IN 9 4b 36 IN 25 13b 45 chassis 9a 9

OUT 9 5b 37 OUT 25 14b 46 chassis 9b 41

IN 10 12b 44 IN 26 15b 47 nc 22a 22

OUT 10 11b 43 OUT 26 16b 48 nc 27a 27

IN 11 30a 30 IN 27 27b 59 nc 29a 29

OUT 11 32c 96 OUT 27 28b 60 nc 32a 32

IN 12 20a 20 IN 28 29b 61 nc 6b 38

OUT 12 19a 19 OUT 28 30b 62 nc 8b 40

IN 13 3b 35 IN 29 21c 85 nc 5c 69

OUT 13 2b 34 OUT 29 22c 86 nc 7c 71

IN 14 21b 53 IN 30 23c 87 nc 15c 79

OUT 14 22b 54 OUT 30 24c 88 nc 17c 81

IN 15 10b 42 IN 31 18c 82 nc 19 83

OUT 15 31a 31 OUT 31 8c 72 nc 25c 89

IN 16 1a 1 IN 32 32b 64 nc 27c 91

OUT 16 1b 33 OUT 32 31b 63 nc 29c 93

designator

1a-32c

designato

r

1-96

Switch

terminal

Connector
designator

1a-32c

Schematic

designato

r

1-96

Switch

terminal

Connecto

r

designato

r

1a-32c

Schemati

designato

1-96

c

r

3-3

Card Connections and Installation

Keithley has a variety of cable and connector accessories
available to accommodate connections from the connector
card to test instrumentation and DUTs (devices under test).
In general, these accessories, which are summarized in
Table 3-2, utilize a custom-built cable assembly for
connections.

Table 3-2

Mass termination accessories

Model Description

7011-KIT-R 96-pin female DIN connector and

housing for round cable (provided
with the Model 7036 card).

7011-MTR 96-pin male DIN bulkhead connector.

Typical connection technique

All external circuitry, such as instrumentation and DUTs,
that you want to connect to the switch card must be termi­nated with a single 96-pin female DIN connector. The fol­lowing connection techniques provide some guidelines and
suggestions for wiring your circuitry.

WARNING

Before beginning any wiring pro­cedures, make sure all power is
off and stored energy in external
circuitry is discharged.

WARNING

CAUTION

The 7011-MTC-2 cable is not
intended to be used with the
Model 7036. Pins 1 and 33 in the
cable are internally shorted, but
the Model 7036 uses these pins
for signaling. Using the 7011­MTC-2 cable with the Model 7036
will short out the system and
cause equipment damage.

NOTE

It is recommended that external cir­cuitry be connected (plugged in) after
the Model 7036 is installed in the Model
7001/7002 mainframe. Installation is
covered at the end of this section.

In Figure 3-2, connections are accomplished using a custom­built cable assembly that consists of a Model 7011-KIT-R
connector and a suitable round cable. Hitachi part number
N2807-P/D-50TAB is a round, 50-conductor cable. Two
cables can be used to provide 100 conductors. The connector
has solder cups to accommodate the individual wires of the
unterminated cable. Figure 3-3 provides an exploded view of
the connector assembly and shows how the cable is con­nected. For further Model 7011-KIT-R assembly informa­tion, refer to the packing list provided with the kit. The
connector end of the resultant cable assembly mates directly
to the multi-pin connector card. The unterminated end of the
cable assembly is wired directly to instrumentation and
DUT.

3-4

When wiring a connector, do not
leave any exposed wires. No con­ductive part of the circuit may be
exposed. Properly cover the con­ductive parts, or death by elec­tric shock may occur.

Card Connections and Installation

Multi-Pin

Connector

Card

Figure 3-2

Typical cable connection technique

Wire directly to
instrumentation

and DUT

Cable

7011-Kit-R

Connector Kit

Notes : Figure 3-3 provides an exploded view showing
how the connector (with cable) is assembled.

Cable Hitachi p/n N2807-P/D-50TAB is a
50-conductor round cable. Two of these
cables can be used to supply 100 conductors.

Figure 3-3

Model 7011-KIT-R (cable) assembly

3-5

Card Connections and Installation

Typical connection scheme

This paragraph shows how the Model 7036 could be
connected to a system that activates external devices and
circuits.

Figure 3-4 shows how external connections can be made to
the system using a custom-built cable that is unterminated at
one end. The unterminated end of the cable can be hard­wired directly to the external devices and power supplies.

Indicator

Lamp

Alarm

Relay

The other end will mate to the Model 7036 switch card. Con­nection details are provided in the Multi-pin (mass termina­tion) connections paragraph.

If adding more Model 7036 cards to a system, simply wire
them in the same manner as the first. Remember that
Model 7036 cards installed in the same mainframe are elec­trically isolated from each other.

7036

Custom-built cable

terminated with

7011-KIT-R

12V

30V

5V

5V 12V 30V

7036

IN 1

IN 21

IN 2

IN 22

IN 3

IN 23

Equivalent Circuit

OUT 21

OUT 22

OUT 3

OUT 23

OUT 1

OUT 2

Relay

Alarm

Indicator

Lamp

Figure 3-4

Typical connection scheme for Model 7036

3-6

Card Connections and Installation

Model 7036 installation and removal

The following paragraphs explain how to install and remove
the Model 7036 switch card from the Model 7001/7002
mainframe.

WARNING

Installation or removal of the
Model 7036 is to be performed by
qualified service personnel. Fail­ure to recognize and observe
standard safety precautions
could result in personal injury or
death.

CAUTION

To prevent contamination to the
switch card that could degrade
performance, only handle the
card by the edges and shields.

Switch card installation

stored energy in external circuit­ry is discharged.

1. Mate the connector card to the relay card if they are sep­arated. Install the supplied 4-40 screw to secure the
assembly. Make sure to handle the cards by the edges
and shields to prevent contamination.

2. Facing the rear panel of the Model 7001/7002, select the
slot that you wish to install the card in.

3. Referring to Figure 3-5, feed the switch card into the
desired slot so the edges of the relay card ride in the
rails.

4. With the ejector arms in the unlocked position, push the
switch card all the way into the mainframe until the arms
engage into the ejector cups. Then push both arms
inward to lock the switch card into the mainframe.

WARNING

To avoid electric shock that could
result in injury or death, make
sure to properly install and tight­en the safety ground screw shown
in Figure 3-5.

Perform the following steps to install the switch card in the
Model 7001/7002 mainframe:

WARNING

Turn off power from all instru­mentation (including the Model
7001/7002 mainframe) and dis­connect their line cords. Make
sure all power is removed and any

Screw

Unlock card

5. Install the screw shown in Figure 3-5.

Switch card removal

To remove the switch card, first unloosen the safety ground
screw, unlock the card by pulling the latches outward, and
pull the card out of the mainframe. Remember to handle the

Ejector
Arms (2)

Screw

Lock card

Figure 3-5

Model 7036 card installation in Model 7001

3-7

4

Operation

Introduction

The information in this section is formatted as follows:

• Power limits  Summarizes the maximum power
limits of the Model 7036 switch card.

• Mainframe control of relay card
rizes programming steps to control the relay card from
the Model 7001/7002 Switch System mainframe.

• Measurement considerations
number of considerations when using the Model 7036
to make measurements.

Power limits

CAUTION

To prevent damage to the card,
do not exceed the maximum sig­nal level specifications of the
card. For reactive loads, be sure
to use voltage clamping and cur­rent limiting as explained in the
Reactive loads paragraph.

 Summa-

 Reviews a

Maximum signal levels

To prevent overheating or damage to the relays, never exceed
the following maximum signal levels: 60VDC, 30V rms,
42V peak between any two inputs or chassis, 1A switched,
30VA (resistive load).

Reactive loads

Operation is specified for resistive loads. Reactive loads
require voltage clamping (for inductive loads) and current
surge limiting (for capacitive loads) to prevent damage to the
relays and to external circuitry.

4-1

Operation

Inductive loads  Inductive reaction voltage must be

limited to less than 60V in DC circuits or 30V rms, 42V peak
in AC circuits. Also consider the load when determining the
voltage limit. Clamping circuits that can be used are shown
in Figure 4-1.

Capacitive loads  The initial surge current from a

capacitive reactive load must be limited. Figure 4-2 shows
circuits that can be used to limit current surges. To protect the
relay, limit current to 1A. Also consider the load when deter­mining the current surge limit.

IN 1

1A

FUSE

IN 2

A. Resistor Clamped (AC or DC Voltages)

IN 1

1A

FUSE

IN 2

7036

7036

OUT 1

OUT 2

OUT 1

OUT 2

R

Load

+

D

Load

IN 1

IN 2

IN 1

IN 2

1A

FUSE

1A

FUSE

High resistance when cold.

*

Low resistance when hot.
Fast thermal recovery.

7036

OUT 1

OUT 2

A. Resistor Limited R = I Limit

R

V

7036

OUT 1

OUT 2

B. Thermistor Limited Rs = I Limit

Thermistor*

(Rs)

V

Figure 4-2

Limiting capacitive reaction current

Mainframe control of relay card

Load

Load

B. Diode Clamped (DC Voltages)

7036

IN 1

IN 2

1A

FUSE

C. Zener Clamped (AC Voltages)

OUT 1

OUT 2

7036

IN 1

1A

FUSE

IN 2

D. Resistor-Capacitor Clamped (AC Voltages)

OUT 1

OUT 2

Figure 4-1

Limiting inductive reaction voltage

Diode

Zener
Diode

The following information pertains to the Model 7036 relay
card. It assumes that you are familiar with the operation of

Zener
Diode

Diode

Load

the Model 7001/7002 mainframe.

If you are not familiar with the operation of the mainframe,
it is recommended that you proceed to Getting Started (Sec­tion 3) in the Model 7001 or Model 7002 Instruction Manual
after reading the following information.

C

R

Load

4-2

1

2

3

4

1234 6785910

SLOT 1

ROW

COLUMN

= OPEN CHANNEL
= CLOSED CHANNEL

7002 LED DISPLAY

7001 Display

CARD 1 CARD 2

1 2 3456 789101 23456 78910

= Open Channel

= Closed Channel

Figure 4-3

Model 7001 channel status display (two cards installed)

Operation

Channel assignments

The Model 7001 has a channel status display (Figure 4-3)
that provides the real-time state of each available channel.
The left portion of the display is for slot 1 (card 1), and the
right portion is for slot 2 (card 2). With two Model 7036
cards installed in the mainframe, the 40 channels of each
card will be displayed as shown in Figure 4-3. For the Model
7002, channel status LED grids are used for the ten slots. The
LED grid for slot 1 is shown in Figure 4-4.

Figure 4-4

Model 7002 channel status display (slot 1)

4-3

Operation

Relay organization of the channel status display for each slot
is shown in Figure 4-5. The relay card contains 40 channels
as shown in the illustration.

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16

21 22 23 24 25 26

31 32 33 34 35 36

17 18 19 20

28 29 30

27

37 38

39 40

Figure 4-5

Display organization for relay card channels

To control the relay card from the mainframe, each relay
must have a unique channel assignment, which includes the
slot number that the card is installed in. The channel assign­ments for the relay card are provided in Figure 4-6. Each
channel assignment is made up of the slot designator (1 or 2)
and the relay card channel. For the Model 7002, the slot des­ignator can be from 1 to 10 since there are ten slots. To be
consistent with Model 7001/7002 operation, the slot desig­nator and relay card channel are separated by an exclamation
point (!). Some examples of CHANNEL assignments are as
follows:

CHANNEL 1!1 = Slot 1, Channel 1
CHANNEL 1!20 = Slot 1, Channel 20
CHANNEL 2!2 = Slot 2, Channel 2
CHANNEL 2!6 = Slot 2, Channel 6

These channels are displayed and controlled from the normal
display state of the mainframe. If currently in the menu
structure, return to the normal display state by pressing
EXIT.

A. Slot 1

(Card 1)

B. Slot 2

(Card 2)

Figure 4-6

Channel assignments

12345678910

1!1 1!2 1!3 1!4 1!5 1!6 1!7 1!8 1!9 1!10

1!11 1!12 1!13 1!14 1!15 1!16 1!17 1!18 1!19 1!20

1!21 1!22 1!23 1!24 1!25 1!26 1!27 1!28 1!29 1!30

1!31 1!32 1!33 1!34 1!35 1!36 1!37 1!38 1!39 1!40

12345678910

2!1 2!2 2!3 2!4 2!5 2!6 2!7 2!8 2!9 2!10

2!11 2!12 2!13 2!14 2!15 2!16 2!17 2!18 2!19 2!20

2!21 2!22 2!23 2!24 2!25 2!26 2!27 2!28 2!29 2!30

2!31 2!32 2!33 2!34 2!35 2!36 2!37 2!38 2!39 2!40

Examples: 1!18 = Slot 1, Channel 18

2!36 = Slot 2, Channel 36

4-4

Operation

Front panel control

NOTE

For the Model 7002, you can use the light
pen to open and close channels.

Closing and opening channels

A channel is closed from the front panel by simply keying in
the channel assignment and then pressing CLOSE. For
example, to close channel 16 of a relay card installed in slot
2, key in the following channel list and press CLOSE:

SELECT CHANNELS 2!16

The above closed channel can be opened by pressing OPEN
or OPEN ALL. The OPEN key opens only the channels spec­ified in the channel list, and OPEN ALL opens all channels.

The following display is an example of a channel list that
consists of several channels:

SELECT CHANNELS 2!1, 2!3, 2!12-2!15

Notice that channel entries are separated by commas (,). A
comma is inserted by pressing ENTER or the right cursor
key ( '
(-) key to separate the range limits. Pressing CLOSE will
close all the channels specified in the channel list. Pressing
OPEN (or OPEN ALL) will open the channels.

). The channel range is specified by using the hyphen

Scanning channels

Channels are scanned by creating a scan list and configurin
the Model 7001/7002 to perform a scan. The scan list is cre­ated in the same manner as a channel list (see Closing and
opening channels). However, the scan list is specified from
the SCAN CHANNELS display mode. (The SCAN LIST
key toggles between the channel list and the scan list.) The
following shows an example of a scan list:

SCAN CHANNELS 2!1, 2!3, 2!11-2!15

When a scan is performed, the channels specified in the scan
list will be scanned in the order that they are presented in the
scan list.

A manual scan can be performed using the RESET default
conditions of the Model 7001/7002. RESET is selected from
the SAVESETUP menu of the main MENU. When RESET
is performed, the mainframe is configured for an infinit
number of manual scans. The first press of STEP takes the
mainframe out of the idle state. The next press of STEP will
close the first channel specified in the scan list. Each subse­quent press of STEP will select the next channel in the scan
list.

Channel patterns can also be used in a channel list. This
allows you to control specific bit patterns for logic circuits.
Example:

SELECT CHANNELS 2!1, M1

Pressing CLOSE will turn on channel 2!1 and the channels
that make up channel pattern M1. Refer to the mainframe
instruction manual for information on defining channel
patterns.

4-5

Operation

IEEE-488 bus operation

Bus operation is demonstrated using Microsoft QuickBASIC

4.5, the Keithley KPC-488.2 (or Capital Equipment Corpo­ration) IEEE interface, and the HP-style Universal Language
Driver (CECHP). Refer to “QuickBASIC 4.5 Programming”
in the mainframe manual for details on installing the Univer­sal Language Driver, opening driver files, and setting the
input terminal. Program statements assume that the primary
address of the mainframe is 07.

Closing and opening channels

The following SCPI commands are used to close and open
channels:

:CLOSe <list>
:OPEN <list>|ALL

The following program statement closes channels 1!1, 1!4
through 1!6, and the channels that make up channel pattern
M1.

PRINT #1, "output 07; clos (@ 1!1, 1!4:1!6,

M1)"

Notice that the colon (:) is used to separate the range limits.

Either of the following statements opens channels 1!1, 1!4
through 1!6, and the channels of M1:

PRINT #1, "output 07; open (@ 1!1, 1!4:1!6,

M1)"

PRINT #1, "output 07; open all"

Scanning channels

There are many commands associated with scanning. How­ever, it is possible to configure a scan using as little as four
commands. These commands are listed as follows:

Closes specified channels

Opens specified (or all) channels.

The first command resets the mainframe to a default scan
configuration. The second command automatically sets the
channel count to the number of channels in the scan list, the
third command defines the scan list, and the fourth command
takes the Model 7001/7002 out of the idle state.

The following program fragment will perform a single scan
of channels 1 through 4 of slot 1 and the channels that make
up channel pattern M1:

PRINT #1, "output 07; *rst"
PRINT #1, "output 07; trig:coun:auto on"
PRINT #1, "output 07; scan (@ 1!1:1!4, M1)"
PRINT #1, "output 07; init"

The first statement selects the *RST default configurationfor
the scan. The second statement sets channel count to the
scan-list-length (5). The third statement defines the scan list,
and the last statement takes the mainframe out of the idle
state. The scan is configured to start as soon as the :INIT
command is executed.

When the previous program fragment is run, the scan will be
completed in approximately 240msec (3msec delay for
channel closures and 3msec delay for each open), which is
too fast to view from the front panel. An additional relay
delay can be added to the program to slow down the scan for
viewing. The program is modified by adding a statement to
slow down the scan. Also, a statement is added to the begin­ning of the program to ensure that all channels are open
before the scan is started. The two additional statements are
indicated in bold typeface.

PRINT #1, "output 07; open all"

PRINT #1, "output 07; *rst"
PRINT #1, "output 07; trig:coun:auto on"

PRINT #1, "output 07; trig:del 0.5"

PRINT #1, "output 07; scan (@ 1!1:1!4, M1)"
PRINT #1, "output 07; init"

*RST
:TRIGger:COUNt:AUTo ON
:ROUTe:SCAN <list>
:INIT

4-6

The first statement opens all channels, and the fourth state­ment sets a 1/2 second delay after each channel closes.

Measurement considerations

R

E

DUT

DUT

R

PAT H

E

OUT

R

PAT H

R

DUT

R

PAT H

+

=

E

DUT

Many measurements made with the Model 7036 are subject
to various effects that can seriously affect low-level measure­ment accuracy. The following paragraphs discuss these
effects and ways to minimize them.

Path isolation

The path isolation is simply the equivalent impedance
between any two test paths in a measurement system. Ideally,
the path isolation should be infinite, but the actual resistance
and distributed capacitance of cables and connectors results
in less than infinite path isolation alues for these devices.

Operation

Path isolation resistance forms a signal path that is in parallel
with the equivalent resistance of the DUT, as shown in Fig­ure 4-7. For low-to-medium device resistance values, path
isolation resistance is seldom a consideration; however, it
can seriously degrade measurement accuracy when testing
high-impedance devices. The voltage measured across such
a device, for example, can be substantially attenuated by the
voltage divider action of the device source resistance and
path isolation resistance, as shown in Figure 4-8. Also, leak­age currents can be generated through these resistances by
voltage sources in the system.

R

DUT

R

PATH

E

DUT

DUT

7036
Card

= Source Resistance of DUT

R

DUT

E

= Source EMF of DUT

DUT

R

= Path Isolation Resistance

PATH

R

= Input Resistance of Measuring Instrument

IN

R

IN

Measure
Instrument

V

Figure 4-7

Path isolation resistance

Figure 4-8

Voltage attenuation by path isolation resistance

Any differential isolation capacitance affects DC measure­ment settling time as well as AC measurement accuracy.
Thus, it is often important that such capacitance be kept as
low as possible. Although the distributed capacitance of the
switch card is generally fi ed by design, there is one area
where you do have control over the capacitance in your sys­tem: the connecting cables. To minimize capacitance, keep
all cables as short as possible.

Magnetic fields

When a conductor cuts through magnetic lines of force, a
very small current is generated. This phenomenon will fre­quently cause unwanted signals to occur in the test leads of a
relay switching system. If the conductor has sufficien
length, even weak magnetic fields like those of the earth can
create sufficient signals to a fect low-level measurements.

Two ways to reduce these effects are: (1) reduce the lengths
of the test leads, and (2) minimize the exposed circuit area.
In extreme cases, magnetic shielding may be required. Spe­cial metal with high permeability at low flux densities (such
as mu metal) is effective at reducing these effects.

Even when the conductor is stationary, magnetically induced
signals may still be a problem. Fields can be produced by
various signals such as the AC power line voltage. Large
inductors such as power transformers can generate substan­tial magnetic fields, so care must be taken to keep the switch­ing and measuring circuits a good distance away from these
potential noise sources.

4-7

Operation

At high current levels, even a single conductor can generate
significant fields. These effects can be minimized by using
twisted pairs, which will cancel out most of the resulting
fields

Radio frequency interference

Radio Frequency Interference (RFI) is a general term used to
describe electromagnetic interference over a wide range of
frequencies across the spectrum. Such RFI can be particu­larly troublesome at low signal levels, but it can also affect
measurements at high levels if the problem is of sufficien
severity.

RFI can be caused by steady-state sources such as radio or
TV signals or some types of electronic equipment (micropro­cessors, high speed digital circuits, etc.), or it can result from
impulse sources, as in the case of arcing in high-voltage envi­ronments. In either case, the effect on the measurement can
be considerable if enough of the unwanted signal is present.

RFI can be minimized in several ways. The most obvious
method is to keep the equipment and signal leads as far away
from the RFI source as possible. Shielding the Model 7036
switch card, signal leads, sources, and measuring instru­ments will often reduce RFI to an acceptable level. In
extreme cases, a specially constructed screen room may be
required to sufficiently attenuate the troublesome signal

shown in Figure 4-9, the resulting ground loop causes cur­rent to fl w through the instrument LO signal leads and then
back through power line ground. This circulating current
develops a small, but undesirable, voltage between the LO
terminals of the two instruments. This voltage will be added
to the source voltage, affecting the accuracy of the measure­ment.

Figure 4-10 shows how to connect several instruments to­gether to eliminate this type of ground loop problem. Here,
only one instrument is connected to power line ground.

Signal Leads

Instrument 1 Instrument 2 Instrument 3

Ground Loop

Current

Power Line Ground

Figure 4-9

Power line ground loops

Instrument 1 Instrument 2 Instrument 3

Many instruments incorporate internal filtering that may
help to reduce RFI effects in some situations. In some cases,
additional external filtering may also be required. Keep in
mind, however, that filtering may have detrimental effects on
the desired signal.

Ground loops

When two or more instruments are connected together, care
must be taken to avoid unwanted signals caused by ground
loops. Ground loops usually occur when sensitive instru­mentation is connected to other instrumentation with more
than one signal return path such as power line ground. As

Power Line Ground

Figure 4-10

Eliminating ground loops

4-8

Operation

Ground loops are not normally a problem with instruments
having isolated LO terminals. However, all instruments in
the test setup may not be designed in this manner. When in
doubt, consult the manual for all instrumentation in the test
setup.

Keeping connectors clean

As is the case with any high-resistance device, the integrity
of connectors can be damaged if they are not handled prop­erly. If connector insulation becomes contaminated, the insu­lation resistance will be substantially reduced, affecting
high-impedance measurement paths.

Oils and salts from the skin can contaminate connector insu­lators, reducing their resistance. Also, contaminants present
in the air can be deposited on the insulator surface. To avoid

these problems, never touch the connector insulating mate­rial. In addition, the Model 7036 card should be used only in
clean, dry environments to avoid contamination.

If the connector insulators should become contaminated,
either by inadvertent touching or from airborne deposits,
they can be cleaned with a cotton swab dipped in clean meth­anol. After thorough cleaning, they should be allowed to dry
for several hours in a low-humidity environment before use,
or they can be dried more quickly using dry nitrogen.

AC frequency response

The AC frequency response of the Model 7036 is important
in test systems that switch AC signals. Refer to the specif ca­tions at the front of this manual.

4-9

5

Service Information

WARNING

The information in this section is
intended only for qualified service per­sonnel. Some of the procedures may
expose you to hazardous voltages that
could result in personal injury or death.
Do not attempt to perform these proce­dures unless you are qualified to do so.

Introduction

This section contains information necessary to service the
Model 7036 switch card and is arranged as follows:

• Handling and cleaning precautions  Discusses han­dling procedures and cleaning methods for the switch
card.

• Performance verificatio  Covers the procedures
necessary to determine if the card is operating properly.

• Special handling of static-sensitive devices  Re­views precautions necessary when handling static-sen­sitive devices.

• Principles of operation  Briefly discusses circuit op­eration.

• Troubleshooting  Presents some troubleshooting
tips for the switch card.

Handling and cleaning precautions

Because of the high impedance circuits on the Model 7036,
care should be taken when handling or servicing the card to
prevent possible contamination that could degrade perfor­mance. The following precautions should be taken when
handling the switch card.

Do not store or operate the card in an environment where
dust could settle on the circuit board. Use dry nitrogen gas to
clean dust off the card if necessary.

Handle the card only by the side edges and shields. Do not
touch any board surfaces, components, or connectors. Do not
touch areas adjacent to electrical contacts. When servicing
the card, wear clean cotton gloves.

If making solder repairs on the circuit board, use an
OA-based (organic activated) flux. Remove the flux from
these areas when the repair is complete. Use pure water
along with plenty of clean cotton swabs to remove the flux
Take care not to spread the flux to other areas of the circuit
board. Once the flux has been removed, swab only the
repaired area with methanol, then blowdry the board with
dry nitrogen gas.

After cleaning, the card should be placed in a 50 ° C low
humidity environment for several hours.

5-1

Service Information





Performance verification

The following paragraphs discuss performance verificatio
procedures for the Model 7036, including channel resis­tance, offset current, contact potential, and isolation.

CAUTION

Contamination will degrade the perfor­mance of the switch card. To avoid con­tamination, always grasp the card by
the side edges and shields. Do not touch
the connectors, and do not touch the
board surfaces or components. On
plugs and receptacles, do not touch
areas adjacent to the electrical contacts.

NOTE

Failure of any performance verification
test may indicate that the switch card is
contaminated. See the Handling and
cleaning precautions paragraph to clean
the card.

Environmental conditions

All verification measurements should be made at an ambient
temperature between 18 ° and 28 ° C, and at a relative humid­ity of less than 70%.

Recommended equipment

Table 5-1 summarizes the equipment necessary for perfor­mance verification, along with an application for each unit.

Switch card connections

The following information summarizes methods that can be
used to connect test instrumentation to the connector card.
Detailed connection information is provided in Section 3.

Table 5-1

Verification equipmen

Description Model Specification Applications

DMM Keithley Model 2000 100 Ω ; 0.01% Path resistance

Electrometer w/voltage source Keithley Model 6517A 20pA, 200pA; 1%

100V source; 0.15%

Sensitive Digital Voltmeter Keithley Model 182 3mV; 60ppm Contact potential

Triax cable (unterminated) Keithley Model 7025

Low thermal cable
(unterminated)

Keithley Model 1484

Offset current, path isola­tion

Offset current

Contact potential

5-2

Service Information

One method to make instrument connections to the switch
card is to hard-wire a 96-pin female DIN connector and then
mate it to the connector on the Model 7036. Shorting con­nections can also be done at the connector. The connector in
the Model 7011-KIT-R connection kit (see Table 3-2) can be
used for this purpose. Pin identification for the multi-pin
connector for the relay card is provided by Figure 3-1 and
Table 3-1.

WARNING

When wiring a connector, do not leave
any exposed wires. No conductive part
of the circuit may be exposed. Properly
cover the conductive parts, or death by
electric shock may occur.

CAUTION

After making solder connections to a
connector, remove solder flux as
explained at the beginning of this sec­tion. Failure to clean the solder connec­tions could result in degraded
performance, preventing the card from
passing verification tests.

Channel resistance tests

Referring to Figure 5-1, perform the following steps to verify
that each contact of every relay is closing properly and that
the resistance is within specification

1. Turn the Model 7001/7002 off if it is on.

2. Set the Model 2000 to the 100 Ω range and connect four
test leads to the INPUT and SENSE Ω 4 WIRE input.

3. Short the four test leads together and zero the Model

2000. Leave zero enabled for the entire test.

4. Connect INPUT HI and SENSE Ω 4 WIRE HI of the
Model 2000 to the input (IN) terminal of Channel 1 as
shown in Figure 5-1.

5. Connect INPUT LO and SENSE Ω 4 WIRE LO to the
output (OUT) terminal of Channel 1.

6. With the card installed in slot 1 (CARD 1) of the main­frame, turn on the Model 7001/7002 and program it to
close channel 1!1 (Slot 1, Channel 1). Verify that the
resistance of this channel is <1 Ω .

7. Repeat the basic procedure of steps 1 through 6 to test
the rest of the channels of the Model 7036 relay switch
card. Remember to close the channel that the Model
2000 is connected to.

Before pre-wiring any connector plugs, study the following
test procedures to fully understand the connection
requirements.

Sense Ω 4 Wire HI

HI

LO

POWER

Model 2000

(Measure 4-Wire Ohms)

Sense Ω 4 Wire LO

Path Resistance Test

Figure 5-1

Channel resistance testing

Input HI

Input LO

Each Channel:

7036

IN

OUT

5-3

Service Information

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

Offset current tests

These tests check leakage current from input (IN) and output
(OUT) to chassis (common-mode) for each channel. In gen­eral, these tests are performed by simply measuring the leak­age current with an electrometer. In the following procedure,
the Model 6517A is used to measure leakage current.

Referring to Figure 5-2, perform the following procedure to
check offset current:

1. Turn off the Model 7001/7002 if it is on.

2. Connect the Model 6517A electrometer to channel 1 as
shown in Figure 5-2. Note that electrometer HI is con­nected to input (IN) of channel 1. Electrometer LO is
connected to chassis ground, which is accessible at the
rear panel of the mainframe.

Model 7025
Unterminated

90-110V

!

180-220V

105-125V

210-250V

115V

!

3. Install the switch card in slot 1 (CARD 1) of the
Model 7001/7002 if it is not already installed.

4. On the Model 6517A, select the 200pA range and
enable zero check and zero correct the instrument.
Leave zero correct enabled for the entire procedure.

5. Turn on the Model 7001/7002.

6. Program the Model 7001/7002 to close channel 1!1.

7. On the Model 6517A, disable zero check and verify that
it is <100pA. This measurement is the common-mode
leakage current of the channel.

8. On the Model 6517A, enable zero check.

9. Repeat the basic procedure in steps 1 through 8 to check
the other channels. Remember to close the channel that
the electrometer is connected to.

HI

Each Channel:

IN

LO

7036

Model 6517A

(Measure Current)

Figure 5-2

Offset current testing

Chassis ground can be
accessed at the rear
panel of the 7001/7002

OUT

5-4

Service Information

Contact potential tests

These tests check the EMF generated by each relay contact
for each channel. The tests simply consist of using a sensitive
DVM (Model 182) to measure the contact potential.

Perform the following procedure to check contact potential
of each path:

1. Turn off the Model 7001/7002 if it is on.

2. Set the Model 182 to the 3mV range, short the input
leads, and press REL READING to null out internal off­set. Leave REL enabled for the entire procedure.

3. Connect the Model 182 to channel 1 as shown in Figure
5-3.

4. Install the switch card in slot 1 (CARD 1) of the
Model 7001/7002 if it is not already installed.

5. Turn on the Model 7001/7002.

6. Program the Model 7001/7002 to close channel 1!1.

Model 1484

Low Thermal Cable

(Unterminated)

7. Verify that the reading on the Model 182 is <4 µ V. This
measurement is the contact potential of the channel.

8. Repeat the basic procedure in steps 1 through 7 to test
the rest of the channels of the Model 7036.

Channel to channel isolation tests

These tests check the leakage resistance (isolation) between
adjacent channels. A channel is simply the circuit from the
input (IN) to the output (OUT) that results by closing the
channel relay.

In general, the test is performed by applying a voltage
(+42V) across two adjacent channels and then measuring the
leakage current across the channels. The isolation resistance
is then calculated as R = V/I. In the following procedure, the
Model 6517A functions as both a voltage source and an
ammeter. In the R function, the Model 6517A internally cal­culates the resistance from the known voltage and current
levels and displays the resistance value.

KEITHLEY 182 SENSITIVE DIGITAL VOLTMETER

Figure 5-3

Contact potential testing

Model 182

TRG
SRQ
REM
TAL K

LSTN

HI

LO

Each channel:

IN

OUT

7036

5-5

Service Information

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

Ground Link
Removed

!

Banana to
Banana Cable

90-110V
105-125V

!

Model 7025
Unterminated
Triax Cable

Each Adjacent Channel Pair:

180-220V
210-250V

115V

HI

(Red

7036

IN

Model 6517A

Source V and
Measure V/I

Unterminated
Banana Cables

Figure 5-4

Channel to channel testing

Refer to Figure 5-4 and perform the following steps to test
channel to channel isolation:

1. Turn off the Model 7001/7002 if it is on.

2. Connect the Model 6517A to channels 1 and 2 as shown
in Figure 5-4. Make sure the voltage source is off.

3. Install the Model 7036 in slot 1 (CARD 1) of the
Model 7001/7002 if it is not already installed.

4. On the Model 6517A, select the ohms function and
choose the 2G Ω range.

5. On the Model 6517A, set the voltage source for +42V.
Make sure the voltage source is off.

6. Place the Model 6517A in the R measurement function.

7. Turn on the Model 7001/7002, and program it to close
channels 1!1 and 1!2 (channels 1 and 2).

8. On the Model 6517A, turn on the output of the voltage
source.

9. After allowing the reading on the Model 6517A to settle,
verify that it is >1G Ω . This measurement is the channel
to channel leakage resistance (isolation) between chan­nels 1 and 2.

HI

OUT

IN

OUT

10. Turn off the Model 6517A voltage source.

11. Turn off the Model 7001/7002.

12. Disconnect the Model 6517A from channels 1 and 2,
and, in a similar manner, reconnect it to channels 2 and
3 (electrometer high to channel 2, and voltage source
high to channel 3).

13. Install the card in slot 1 (CARD 1) of the
Model 7001/7002 if it is not already installed.

14. Turn on the Model 7001/7002 and program it to close
channels 1!2 and 1!3.

15. On the Model 6517A, turn on the voltage source.

16. After allowing the reading on the Model 6517A to settle,
verify that it is >1G Ω . This is the isolation between
channels 2 and 3.

17. Using Table 5-2 as a guide, repeat the basic procedure of
steps 11 through 16 for the rest of the path pairs (starting
with test 3).

5-6

Table 5-2

Channel to channel isolation tests

Test no. Isolation test Test equipment location Channels closed

1 Channel 1 to Channel 2 Channels 1 and 2 1!1 and 1!2

2 Channel 2 to Channel 3 Channels 2 and 3 1!2 and 1!3

3 Channel 3 to Channel 4 Channels 3 and 4 1!3 and 1!4

4 Channel 4 to Channel 5 Channels 4 and 5 1!4 and 1!5

5 Channel 5 to Channel 6 Channels 5 and 6 1!5 and 1!6

6 Channel 6 to Channel 7 Channels 6 and 7 1!6 and 1!7

7 Channel 7 to Channel 8 Channels 7 and 8 1!7 and 1!8

8 Channel 8 to Channel 9 Channels 8 and 9 1!8 and 1!9

9 Channel 9 to Channel 10 Channels 9 and 10 1!9 and 1!10

10 Channel 10 to Channel 11 Channels 10 and 11 1!10 and 1!11

11 Channel 11 to Channel 12 Channels 11 and 12 1!11 and 1!12

12 Channel 12 to Channel 13 Channels 12 and 13 1!12 and 1!13

13 Channel 13 to Channel 14 Channels 13 and 14 1!13 and 1!14

14 Channel 14 to Channel 15 Channels 14 and 15 1!14 and 1!15

15 Channel 15 to Channel 16 Channels 15 and 16 1!15 and 1!16

16 Channel 16 to Channel 17 Channels 16 and 17 1!16 and 1!17

17 Channel 17 to Channel 18 Channels 17 and 18 1!17 and 1!18

18 Channel 18 to Channel 19 Channels 18 and 19 1!18 and 1!19

19 Channel 19 to Channel 20 Channels 19 and 20 1!19 and 1!20

20 Channel 20 to Channel 21 Channels 20 and 21 1!20 and 1!21

21 Channel 21 to Channel 22 Channels 21 and 22 1!21 and 1!22

22 Channel 22 to Channel 23 Channels 22 and 23 1!22 and 1!23

23 Channel 23 to Channel 24 Channels 23 and 24 1!23 and 1!24

24 Channel 24 to Channel 25 Channels 24 and 25 1!24 and 1!25

25 Channel 25 to Channel 26 Channels 25 and 26 1!25 and 1!26

26 Channel 26 to Channel 27 Channels 26 and 27 1!26 and 1!27

27 Channel 27 to Channel 28 Channels 27 and 28 1!27 and 1!28

28 Channel 28 to Channel 29 Channels 28 and 29 1!28 and 1!29

29 Channel 29 to Channel 30 Channels 29 and 30 1!29 and 1!30

30 Channel 30 to Channel 31 Channels 30 and 31 1!30 and 1!31

31 Channel 31 to Channel 32 Channels 31 and 32 1!31 and 1!32

32 Channel 32 to Channel 33 Channels 32 and 33 1!32 and 1!33

33 Channel 33 to Channel 34 Channels 33 and 34 1!33 and 1!34

34 Channel 34 to Channel 35 Channels 34 and 35 1!34 and 1!35

35 Channel 35 to Channel 36 Channels 35 and 36 1!35 and 1!36

36 Channel 36 to Channel 37 Channels 36 and 37 1!36 and 1!37

37 Channel 37 to Channel 38 Channels 37 and 38 1!37 and 1!38

38 Channel 38 to Channel 39 Channels 38 and 39 1!38 and 1!39

39 Channel 39 to Channel 40 Channels 39 and 40 1!39 and 1!40

Service Information

5-7

Service Information

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

Common-mode isolation tests

These tests check the common-mode isolation (leakage
resistance) between the input (IN) and chassis ground of
every channel.

In general, the test is performed by applying a voltage (42V)
and then measuring the leakage current. The isolation resis­tance is then calculated as R = V/I. In the following proce­dure, the Model 6517A functions as a voltage source and an
ammeter. In the R function, the Model 6517A internally cal­culates the resistance from the known voltage and current
levels and displays the resistance value.

Refer to Figure 5-5 and perform the following steps to test
common-mode isolation.

1. Turn off the Model 7001/7002 if it is on.

2. Connect the Model 6517A to channel 1 as shown in
Figure 5-5. Make sure the voltage source is off. Note
that the voltage source HI is connected to the input (IN).
Electrometer HI can be connected to chassis ground at
the rear panel of the Model 7001/7002.

3. Install the Model 7036 in slot 1 (CARD 1) of the
Model 7001/7002 if it is not already installed.

4. On the Model 6517A, select the ohms function and
choose the 2G Ω range.

5. On the Model 6517A, set the voltage source for +42V.
Make sure the voltage source is still off.

6. Place the Model 6517A in the R measurement function.

7. Turn on the Model 7001/7002 and program the main­frame to close channel 1!1 (slot 1, channel 1).

8. On the Model 6517A, turn on the voltage source.

9. After allowing the reading on the Model 6517A to settle,
verify that it is >1G Ω . This measurement checks the
common-mode isolation of channel 1.

10. Turn off the Model 6517A voltage source.

11. Repeat the basic procedure in steps 1 through 10 to
check differential isolation of the other Model 7036
channels. Remember to close the relay of the channel
being checked.

12. Turn off the Model 6517A voltage source and the Model
7001/7002.

Ground Link
Removed

!

Figure 5-5

Common-mode isolation testing

Banana to
Banana Cable

105-125V

!

Model 6517A

Model 7025
Unterminated
Triax Cable

90-110V

180-220V
210-250V

115V

Source V and
Measure V/I

Unterminated
Banana Cables

HI

(Red)

HI

HI

Chassis ground
is accessible at
7001/7002
rear panel

Each channel:

7036

IN

OUT

5-8

Service Information

Special handling of static-sensitive devices

CMOS and other high-impedance devices are subject to pos­sible static discharge damage because of the high-impedance
levels involved. The following precautions pertain specif ­cally to static-sensitive devices. However, since many
devices in the Model 7036 are static-sensitive, it is recom­mended that they all be treated as static-sensitive.

1. Such devices should be transported and handled only in
containers specially designed to prevent or dissipate
static buildup. Typically, these devices will be received
in anti-static containers made of plastic or foam. Keep
these parts in their original containers until ready for
installation.

2. Remove the devices from their protective containers
only at a properly grounded work station. Also, ground
yourself with a suitable wrist strap while working with
these devices.

3. Handle the devices only by the body; do not touch the
pins.

4. Any printed circuit board into which the device is to be
inserted must f rst be grounded to the bench or table.

5. Use only anti-static type de-soldering tools and
grounded-tip soldering irons.

Principles of operation

The paragraphs below discuss the basic operating principles
for the Model 7036 and can be used as an aid in troubleshoot­ing the switch card. The schematic drawings of the switch
card are shown on drawing numbers 7036-106 and 7036-176
located at the end of Section 6.

Block diagram

Figure 5-6 shows a simplif ed block diagram of the
Model 7036. Key elements include the relay drivers and
relays, as well as the ROM, which contains card ID and con­f guration information. These various elements are discussed
in the following paragraphs.

To Mainframe

To Mainframe

Figure 5-6

Model 7036 block diagram

CLK

Data

Strobe

Enable

ID CLK

ID DATA

+6V,

+15V

Relay

Drivers

U101­U105

ROM

U107

Relays

User connections

+3.5V (Steady State)
+5.7 (≈ 100 msec during
relay actuation)

Relay

Power

Control

Q101, Q102
U106, U108

5-9

Service Information

ID data circuits

Upon power-up, card identif cation information from each
card is read by the mainframe. This ID data includes such
information as card ID, hardware settling time, and relay
conf guration information.

ID data is contained within an on-card EEPROM (U107). In
order to read this information, the sequence described below
is performed on power-up.

1. The IDDATA line (pin 5 of U107) is set from high to low
while the IDCLK line (pin 6 of U107) is held high. This
action initiates a start command to the ROM to transmit
data serially to the mainframe (Figure 5-7).

ID CLK

ID DATA

Start Bit Stop Bit

Figure 5-7

Start and stop sequences

4. Once all data is received, the mainframe sends a stop
command, which is a low-to-high transition of the
IDDATA line with the IDCLK line held high
(Figure 5-7).

Relay control

Card relays are controlled by serial data transmitted via the
relay DATA line. A total of f ve bytes for each card are
shifted in serial fashion into latches located in the card relay
driver ICs. The serial data is clocked in by the CLK line. As
data overf ows one register, it is fed out the Q’s line of the
register down the chain.

Once all f ve bytes have shifted into the card, the STROBE
line is set high to latch the relay information into the Q out­puts of the relay drivers, and the appropriate relays are ener­gized (assuming the driver outputs are enabled, as discussed
below). Note that a relay driver output goes low to energize
the corresponding relay.

Relay power control

A relay power control circuit, made up of Q101, Q102,
U106, U108, and associated components, keeps power dissi­pated in relay coils at a minimum, thus reducing possible
problems caused by thermal EMFs.

2. The mainframe sends the ROM address location to be
read over the IDDATA line. The ROM then transmits an
acknowledge signal back to the mainframe, and it then
transmits data at that location back to the mainframe
(Figure 5-8).

3. The mainframe then transmits an acknowledge signal,
indicating that it requires more data. The ROM will then
sequentially transmit data after each acknowledge sig­nal it receives.

ID CLK

189

I DD ATA
(Data output
from mainframe
or ROM)

I DD ATA
(Data output
from mainframe
or ROM)

Start

Figure 5-8

Transmit and acknowledge sequence

During steady-state operation, the relay supply voltage, +V,
is regulated to +3.5V to minimize coil power dissipation.
When a relay is f rst closed, the STROBE pulse applied to
U106 changes the parameters of the relay supply voltage reg­ulator, Q101, allowing the relay supply voltage, +V, to rise to
+5.7V for about 100msec. This brief voltage rise ensures that
relays close as quickly as possible. After the 100msec period
has elapsed, the relay supply voltage (+V) drops back down
to its nominal steady-state value of +3.5V.

Acknowledge

5-10

Service Information

Power-on safeguard

NOTE

The power-on safeguard circuit dis­cussed below is actually located on the
digital board in the Model 7001/7002
mainframe.

A power-on safeguard circuit, made up of U114 (a D-type
f ip-f op) and associated components, ensures that relays do
not randomly energize on power-up and power-down. This
circuit disables all relays (all relays are open) during power­up and power-down periods.

The PRESET line on the D-type f ip-f op is controlled by the
68302 microprocessor, while the CLK line of the D-type
f ip-f op is controlled by a port line on the 68302 processor.
The Q output of the f ip-f op drives each switch card relay
driver IC enable pin (U101-U105, pin 8).

When the 68302 microprocessor is in the reset mode, the
f ip-f op PRESET line is held low, and Q out immediately
goes high, disabling all relays (relay driver IC enable pins are
high, disabling the relays.) After the reset condition elapses
( ≈ 200msec), PRESET goes high while Q out stays high.
When the f rst valid STROBE pulse occurs, a low logic level
is clocked into the D-type f ip-f op, setting Q out low and
enabling all relay drivers simultaneously. Note that Q out
stays low, (enabling relay drivers) until the 68302 processor
goes into a reset condition.

Troubleshooting

Troubleshooting equipment

Table 5-3 summarizes recommended equipment for trouble­shooting the Model 7036.

Table 5-3

Recommended troubleshooting equipment

Manufacturer

Description

Multimeter Keithley 2000 Measure DC voltages

Oscilloscope TEK 2243 View logic waveforms

Troubleshooting access

In order to gain access to the relay card top surface to mea­sure voltages under actual operation conditions, perform the
following steps:

1. Disconnect the connector card from the relay card.

2. Remove the Model 7001/7002 cover.

3. Install the relay card in the CARD 1 slot location.

4. Turn on Model 7001/7002 power to measure voltages
(see following paragraph).

and model Application

5-11

Service Information

Troubleshooting procedure

Table 5-4 summarizes switch card troubleshooting.

WARNING

Lethal voltages are present within the
Model 7001/7002 mainframe. Some of
the procedures may expose you to haz­ardous voltages. Observe standard
safety precautions for dealing with live
circuits. Failure to do so could result in
personal injury or death.

CAUTION

Observe the following precautions when
troubleshooting or repairing the switch
card:

To avoid contamination, which could
degrade card performance, always han­dle the card only by the handle and side
edges. Do not touch edge connectors,
board surfaces, or components on the
card. Also, do not touch areas adjacent
to electrical contacts on connectors.

Use care when removing relays from the
PC board to avoid pulling traces away
from the circuit board. Before attempt­ing to remove a relay, use an appropri­ate de-soldering tool such as a solder
sucker to clear each mounting hole
completely free of solder. Each relay pin
must be free to move in its mounting
hole before removal. Also, make certain
that no burrs are present on the ends of
the relay pins.

Table 5-4

Troubleshooting procedure

Step Item/component Required condition Comments

1 GND test point (C114) All voltages referenced to digital ground

(GND pad).

2 +6V pad (Q101, pin 2) +6VDC Relay voltage.

3 +5V pad (C103) +5VDC Logic voltage.

4 +15V pad (R101) +15VDC Relay bias voltage.

5 +V pad (C114) +3.5VDC* Regulated relay voltage.

6 U107, pin 6 ID CLK pulses During power-up only.

7 U107, pin 5 ID DATA pulses During power-up only.

8 U101, pin 7 STROBE pulse End of relay update sequence.

9 U101, pin 2 CLK pulses During relay update sequence only.

10 U101, pin 3 DATA pulses During relay update sequence only.

11 U101-U105, pins 10-18 Low with relay energized; high

with relay de-energized.

Relay driver outputs.

*+3.5VDC present at +V pad under steady-state conditions. This voltage rises to +5.7VDC for about 100msec when relay conf guration is changed.

5-12

6

Replaceable Parts

Introduction

This section contains replacement parts information, sche­matic diagrams, and component layout drawings for the
Model 7036.

Parts lists

Parts lists for the various circuit boards are included in tables
integrated with schematic diagrams and component layout
drawings for the boards. Parts are listed alphabetically in
order of circuit designation.

Ordering information

To place an order, or to obtain information concerning
replacement parts, contact your Keithley representative or
the factory (see inside front cover for addresses). When
ordering parts, be sure to include the following information:

1. Card model number 7036

2. Card serial number

3. Part description

4. Circuit description, if applicable

5. Keithley part number

Factory service

If the card is to be returned to Keithley Instruments for repair,
perform the following:

1. Complete the service form at the back of this manual
and include it with the card.

2. Carefully pack the card in the original packing carton or
the equivalent.

3. Write ATTENTION REPAIR DEPT on the shipping
label.

NOTE

It is not necessary to return the main­frame with the card.

6-1

Replaceable Parts

Component layouts and schematic diagrams

Component layout drawings and schematic diagrams are
included on the following pages integrated with the parts
lists:

Table 6-1  Parts List, Relay Card for Model 7036.

7036-100  Component Layout, Relay Card for

Model 7036.

7036-106  Schematic, Relay Card for Model 7036.

Table 6-2  Parts List, Mass-Terminated Connector Card

for Model 7036.

7035-170  Component Layout, Mass-Terminated

Connector Card for Model 7036.

7036-176  Schematic, Mass-Terminated Connector Card

for Model 7036.

Table 6-3  Parts List, Model 7011-KIT-R 96-pin Female

DIN Connector Kit.

6-2

Table 6-1

Relay card for Model 7036, parts list

Replaceable Parts

Circuit
designation Description

2-56X3/16 PHILLIPS PAN HEAD SCREW (RELAY BOARD
TO SHIELD)
2-56X5/8 PHILLIPS PAN HEAD FASTENER FA-245-1
2-56X5/8 PHILLIPS PAN HEAD SCREW 2-56X5/8PPH
2-56X5/16 PHILLIPS PAN HEAD SEMS SCREW (CONNEC­TOR TO SHIELD)
4-40X3/16 PHILLIPS PAN HEAD SEMS SCREW 4-40X3/16PPHSEM
4-40 PEM NUT FA-131
EJECTOR ARM 7011-301B
IC, SERIAL EPROM, 24C01P IC-737
ROLL PIN (FOR EJECTOR ARMS) DP-6-1
SHIELD 7011-305C

STANDOFF, 2 CLEARANCE ST-204-1
C101-107, 112,
114,116,123,125
C108,113,115 CAP, 150pF, 10%, 1000V, CERAMIC C-64-150P
C109,111 CAP, 1µF, 20% 50V, CERAMIC C-237-1
C110 CAP, 0.001µF, 20%, 500V, CERAMIC C-22-.001
C122,124 CAP, 10µF, -20+100% 25V, ALUM ELEC C-314-10

J1002,1003 CONN, 48-PIN, 3-ROW CS-736-2

K101-140 RELAY, ULTRA-SMALL POLARIZED, TF2E-5V RL-149

CAP, 1µF, 20% 50V, CERAMIC C-365-.1

Keithley
part no.

2-56X3/16PPH

2-56X5/16PPHSEM

P2001 CONN, 32-PIN, 2-ROW CS-775-1

Q101 TRANS, NPN PWR, TIP31 (T0-220AB) TG-253

Q102 TRANS, N CHAN MOSPOW FET, 2N7000 (T0-92) TG-195

R101,102 RES, 560, 10%, 1/2W, COMPOSITION R-1-560
R103 RES, 1K, 1%, 1/8W, METAL FILM R-88-1K
R104 RES, 2.49K, 1%, 1/8W, METAL FILM R-88-2.49K
R105 RES, 1.15K, 1%, 1/8W, METAL FILM R-88-1.15K
R106 RES, 10K, 5%, 1/4W, COMPOSITION OR FILM R-76-10K
R107 RES, 220K, 5%, 1/4W, COMPOSITION OR FILM R-76-220K

S107 SOCKET S0-72

ST101 4-40X0.812 STANDOFF ST-137-20

U101-105 IC, 8-BIT SERIAL-IN LATCH DRIVER, 5841A IC-536
U106 IC, RETRIG MONO MULTIVIB, 74HC123 IC-492
U107 PROGRAM 7036-800A01
U108 IC, AJD SHUNT REGULATOR, TL431CLP IC-677

6-3

Table 6-2

Mass-terminated connector card for Model 7036, parts list

Replaceable Parts

Circuit
designation Description

2-56X3/16 PHILLIPS PAN HEAD SCREW (FOR SHIELD) 2-56X3/16PPH

2-56X3/8 PHILLIPS PAN HEAD SCREW (FOR BRACKET) 2-56X3/8PPH

2-56X7/16 PHILLIPS PAN HEAD SCREW (FOR SHIELD AND

SHIMS)

4-40X1/4 PHILLIPS PAN HEAD SEMS SCREW (RELAY

BOARD TO CONNECTOR BOARD)

BRACKET 7011-307

CONNECTOR SHIM 7011-309A

SHIELD 7011-311A

STANDOFF ST-203-1

J1004 CONN, 96-PIN, 3-ROW CS-514

P1002,1003 CONN, 48-PIN, 3-ROW CS-748-3

Keithley
part no.

2-56X7/16PPH

4-40X1/4PPHSEM

6-5

43 2

7035-170

NO.

A

1

DATEENG.REVISIONECA NO.LTR.

D

D

WARNING: USER SUPPLIED

C

J1004

P1003

LETHAL VOLTAGE MAY BE
PRESENT ON CONNECTORS
OR P.C. BOARD.

!

REFER TO MANUAL FOR
MAXIMUM VOLTAGE
RATING OF CONNECTORS.

P1002

C

B

NOTE: FOR COMPONENT INFORMATION, PLEASE REFER TO PRODUCT STRUCTURE.

B

A

A

QTY.NEXT ASSEMBLYMODEL

1 OF 1

SCALEDATE

KEITHLEY

KEITHLEY INSTRUMENTS INC.

CLEVELAND, OHIO 44139

DIM ARE IN IN. UNLESS OTHERWISE NOTED

DIM. TOL. UNLESS OTHERWISE SPECIFIED

XX=+.01
XXX=+.005

ANG.=+1
FRAC.=+1/64

2/18/97

CAB

DO NOT SCALE THIS DRAWING

1:1

APPR.DRN

TITLE

C

NO.

43 2

USED ON

COMPONENT LAYOUT

CONNECTOR BOARD

7035-170

1

PG

Table 6-3

Model 7011-KIT-R 96-pin Female DIN connector kit

Replaceable Parts

Circuit
designation Description

96-PIN FEMALE DIN CONNECTOR CS-787-1

BUSHING, STRAIN RELIEF BU-27

CABLE ADAPTER, REAR EXIT (INCLUDES TWO CABLE

CLAMPS)

CONNECTOR HOUSING CS-788

Keithley
part no.

CC-64

6-7

Index

A

AC frequency response, 4-9

B

Basic switch configuration (SPST),

2-1

Block diagram, 5-9

C

Card connections and installation, 3-1
Channel assignments, 4-3
Channel to channel isolation tests, 5-5
Channel resistance tests, 5-3
Closing and opening channels, 4-5, 4-6
Common-mode isolation tests, 5-8
Component layouts and schematic dia-

grams, 6-2

Contact potential tests, 5-5

E

Environmental conditions, 5-2

F

Factory service, 6-1
Features, 1-1
Front panel control, 4-5

G

General information, 1-1
Ground loops, 4-8

H

Handling and cleaning precautions,

5-1

Handling precautions,1-2, 3-1

I

ID data circuits, 5-10
IEEE-488 bus operation, 4-6
Inspection for damage, 1-2
Instruction manual, 1-3

K

Keeping connectors clean, 4-9

M

Magnetic fields, 4-7
Mainframe control of relay card, 4-2
Manual addenda, 1-2
Maximum signal levels, 4-1
Measurement considerations, 4-7
Model 7036 installation and removal,

3-7

Multi-pin (mass termination)

connections, 3-2

O

Offset current tests, 5-4
Operation, 4-1
Optional accessories, 1-3
Ordering information, 6-1

P

Parts lists, 6-1
Path isolation, 4-7
Performance verification, 5-2
Power limits, 4-1
Power-on safeguard, 5-11
Principles of operation, 5-9

R

Radio frequency interference, 4-8
Reactive loads, 4-1
Recommended equipment, 5-2
Relay control, 5-10
Relay power control, 5-10
Repacking for shipment, 1-3
Replaceable parts, 6-1

S

Safety symbols and terms, 1-2
Scanning channels, 4-5, 4-6
Service information, 5-1
Shipping contents, 1-2
Specifications, 1-2
Special handling of static-sensitive de-

vices, 5-9
Switch card connections, 5-2
Switch card installation, 3-7
Switch card removal, 3-7

i-1

T

Troubleshooting, 5-11
Troubleshooting access, 5-11
Troubleshooting equipment, 5-11
Troubleshooting procedure, 5-12
Typical connection scheme, 3-6
Typical connection technique, 3-4

U

Unpacking and inspection, 1-2

W

Warranty information, 1-1

i-2

Service Form

Model No. Serial No. Date

Name and Telephone No.

Company

List all control settings, describe problem and check boxes that apply to problem.

Intermittent

❏

❏

IEEE failure
Front panel operational

❏

Display or output (check one)

Drifts

❏
❏

Unstable

❏

Overload

❏

Calibration only

❏

Data required

(attach any additional sheets as necessary)

Show a block diagram of your measurement system including all instruments connected (whether power is turned on or not).
Also, describe signal source.

Analog output follows display

❏

❏

Obvious problem on power-up
All ranges or functions are bad

❏

Unable to zero

❏
❏

Will not read applied input

❏

CertiÞcate of calibration required

Particular range or function bad; specify

❏

❏

Batteries and fuses are OK
Checked all cables

❏

Where is the measurement being performed? (factory, controlled laboratory, out-of-doors, etc.)

What power line voltage is used? Ambient temperature? °F

Relative humidity? Other?

Any additional information. (If special modiÞcations have been made by the user, please describe.)

Be sure to include your name and phone number on this service form

.

Keithley Instruments, Inc.

28775 Aurora Road
Cleveland, Ohio 44139

Printed in the U.S.A.