Keithley 7011-C, 7011-S Service manual

Instruction Manual

Models 7011 -S and 701 I-C

Quad 1 x 10 Multiplexer Cards

Contains Operating and Servicing Information

W ARRANTY

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 Keithle y representative, or contact Keithle y 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.

LIMIT A TION 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.

Keithley Instruments, Inc.

Sales Offices: BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]

CHINA: Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: [phone]
FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: [phone] • Fax: [phone]
FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
KOREA: FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-130 • 82-2-574-7778 • Fax: [phone]
NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: [phone]
SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: [phone]

28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]

1-888-KEITHLEY (534-8453) • www.keithley.com

© Copyright 2001 Keithley Instruments, Inc.

Printed in the U.S.A.

11/01

Models 7011 -S and 7011 -C Instruction Manual

01991, Keithley Instruments, Inc.

Test Instrumentation Group

All Rights Reserved

Cleveland, Ohio, U. S. A.

Manual Print History

The print histoxy shown below lists the printing dates

of

all Revisions and Addenda created for this manual. The
Revision Level letter increases alphabetically as the w@ 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.

R&ion A (Dcament Number 7011-90101) ...... .._.............~

Addendum A (Document Number 7011-901-02)

Revision B (Donunmt Number 7011~901-01). ............................................................................... l&1-31 1992

Revision C (Dmment Number 7011-90141) .......................................................................... December 1992

..........................................................................

................................................

November 1991

January 992

Safety Precautions

The following safety precautions should be observed before using
this product and any associaled instrumentation. Although some in-

~tnmen~s and accessories would nomxdly be used with non-haz­ardous voltages, there are situations where hazardous conditions

may be p*esent.
This product is intended for use by qualified personnel who recog-

nize shock hazards and are familiar with the safety precautions re-

quired to avoid possible injury. Read the operating information
carefully before using the product.

The types of product users arc:
Responsible body is tbc 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 instm­ment. 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 proccdurcs explicitly state if the operator may per­form them. Otherwise, they should be performed only by service
perS”lld.

Service personnel 8.n~ 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. A good safety practice is to expect
that hazardous voltage is present in any unknown circuit before

measuring.

Users of this product must be protected from electric shock at all
times. The responsible body must ensure that users are prevcntcd
access and/or insulated from every connection point. In some cases,
connections must be exposed to potendal 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 voks, no conductive part of the circuit may be
exposed.

As described in the International Electrotechnical Commission
(IEC) Standard IEC 664, digital multimeter measuring circuits
(c,g,, Keithley Models 175A, 199, 2000, 2001, 2002, and 2010)
measuring circuits are Installation Category Il. All other instm­merits’ signal terminals are Installation Category I and must not bc

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 lint cord is connect­ed to a properly grounded power receptacle. Inspect the connecting
cables, teat 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.

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 fixturn panels, or
switching card.

When fuses are used in a product. replacc with same type and rating
Car continued protection against fire hazard.

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

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

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

symbol on an instrument indicates that the user should re-

fer to the operating instructions located in the manual.

The A

sure 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.

symbol oo an instrument shows that it can source or mea-

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 inout iacks. must be ourchased from Keithlev lnsm-

mats. Standard fuses, with applicable national safety approvals,
may be used if the rating and type arc 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 sc-

leaed parts should be purchased only through Kcithley Instruments
to maintain accuracy and functionality of the product.) If you arc
unsure about the applicability of a replacement component, call a
Keithley Instruments oflicc for information.

To clean the instrument. USC a dame 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 instmmcnt.

The CAUTION heading in a manual explains hazards that could
damage the instrument. Such damage may invalidate the warranty.

7011SPECIFICATIONS

MOD”, ‘IOU-S Quad 1x10 Multiplew with SaewT.smh&.
MODEL7011-C QuadlxlOMvltiplexerwithMT~~Connector.

MDLTIPLBX CONPIGDRATION Four independent 1x10 2-p& Multi-

plex banks or two independent 1x10 &pole Multiplex banks. Adjjcent
banksenbecomfftedtogether. Jumperscanberemovedtoisolateany
bank from the backplane.

CONTACT CONFIGDRATION: 2-jmle Form A @Ii, Lo).

CONNECTOR TYPE:

7011-5: Screw terminal, #16AWG

mmc

MAXMUM SIGNAL LEVEb

DC Sign& 1lOV DC behveen any two pins, IA witched.
AC Sign& 125V FM5 or 173V AC peak, between any two pins,

COMMON MODE VOLTAGE: 175” peak, my pin to chassis.
CONTACTLIFE

O.D. 28 Conductors
with .062 inch O.D.

%-pin m&Ewxardconnebor. Mates tofem&twistedwire
cable, crimp or solder connedor.

bG.eive load).
1A switched, 60VA ke&tive load).

IMximllm wire size, with a92 tnch

maxima

30 Conductor madmum

#Z?AWG

typical wire size

3WA

CONTACT POTENTIAL

7011-5: c 500 nv per contact pair Hi, Lo).

< 1.5 pv par single contact

m11-c < 1.5 WV per contact pair m, Lo) eypically < 1 @q.

< 35 p? per single contact oj@zdly c 3 PVL

OPFSET ‘XItRt3iVI: < 100 PA.
ACTUATION TIME: 3 ms.
ISOLATION:

Bank >lC@Q < 25 pF.
CbanneI to channel: >lO%Z, < 50 pF.
Differenti Configured as 1x10 =-l@Q, < 100 pF.

Configured as 1x40 >loSQ, < 200 pF.

Common Mode Configured as 1x10 >lOQ, < 2W pF.

Conftgurect as 1x40 >l@O, < 600 pF.

CROSS TALK OMHz, 500 Load):

Bank <-4OdB.
Channeb <4OdB.

INSERTION LOSS (MS2 Somx,sO Load): < 0.1 dB below 1 MHz, < 3 dB

below 2 MHZ.
RELAYDRNECURRENT (per r&y): 16 mA.
E7WIRONMEN-C

opdi0~ O’C to WC, up to 35-x < 80% Fx.

smagez
spedfieti0ns subjj to change without notice.

-25°C to 65’C

Table of Contents

........................................................................................................................................................................................................................................................

....................................................................................................................................................................................................................

..........................................................................................................................................................................................................................................................................................................................................................

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.7.1

1.7.2

1.7.3

1.7.4

1.8

2.1

2.2

22.1

2.2.2

2.3

2.3.1

2.3.2

2.3.3

2.3.4

2.4

2.4.1

2.4.2

Introduction

Features .............................................................................................................................................................

warranty informaton..

Manual a&km& .............................................................................................................................................

Safety symbols and terms ..............................................................................................................................

specifications ...................................................................................................................................................

Unpacking am.3 inspection

Inspectior, for damage
Shipping axItents..
apron mand..

Repacking for shipment .........................................................................................................................

Optional a~c~soties.. ......................................................................................................................................

Introduct$m

Basic m&ipkxer ca~figurations ..................................................................................................................

Multiplexer bank-to-bank jumpers.. .....................................................................................................

Backplane jumpers

Typical nultiplexer switching schemes.. .....................................................................................................

S&++&xl

Differential switching .............................................................................................................................

sensing. .....................................................................................................................................................

SMIJ co~cxtiq~.

Multiplexer expansmn

Two-card svitching system
Mainframe multiplexer expansion

.....................................................................................................................................................

...................................................................................................................................

..................................................................................................................................

................................................................................................................................

....................................................................................................................................................

..................................................................................................................................

swit&ing

..........................................................................................................................

....................................................................................................................................

..................................................................................................................................

1-l
l-1

l-2
l-2
1-2
1-2
l-2
l-2
l-2

1-3
1-3
l-3

2-1
2-1
2-2
2-5

2-6
2-7
2-7
2-a
2-8

2-10
t:?y

3.1

3.2

3.3

3.3.1

3.3.2

3.3.3

3.3.4

3.4

3.4.1

3.4.2

3.4.3

3.5

~~od,,,&m,

&n,&,g

C~~&i~~. .....................................................................................................................................................

&&-t&m& jumpers
Backplane *pa
Screw te&d KXEE&X card

Multi-pin (mass te

Tyqicd com&icm s&emes ........................................................................................................................

Single card system..
Two-c& system..

Tw~mainfrme system

Model 7011 i,,&&hc,n and remow.,

.....................................................................................................................................................

prxa~tion,s

.....................................................................................................................................

..................

.....................................................................................

rmination) connector

...............................................................................................................................

.................................................................................................................................

........................................................................................................................

......................................................................................................... 3-19

card

3-l

3-l
3-l

3-2
3-3
3-4
3-6

3-11

3-11

3-14
3-14

4.1 Introduction..

4.2

4.3

4.3.1

4.3.2

4.3.3

4.4

4.4.1

4.4.2

4.4.3

4.5

4.5.1

4.52

4.5.3

4.5.4

4.5.5

4.5.6 AC frequency

Power

limits..

Mainframe control

Channel assignments
Front panel control.
IEEE-488 bus operation..

Multiplexer switching examples

Resistor
Transistor
Testing

Measurement considerations

Path isolation..
Magnetic fields
Radio frequency interference..
Ground loops
Keeping connectors clean

....................................................................................................................................................

....................................................................................................................................................

testing .........................................................................................................................................

testing

with matrix cards.. ...................................................................................................................

4-1

4-1

of multiplexer card..

......................................................................................................

..............................................................................................................................

.................................................................................................................................

.........................................................................................................................

...................................................................................................................

4-l
42
4-4
44
4-5
45

.....................................................................................................................................

49

4-11

.......................................................................................................................

........................................................................................................................................

.......................................................................................................................................

.............................................................................................................

.........................................................................................................................................

.....................................................................................................................

response..

.......................................................................................................................

4-15
415
4-16
4-16
4-17
4-17
4-17

5.1

5.2

5.3

5.3.1

5.3.2

5.3.3

5.3.4

5.3.5

5.3.6

5.3.7

5.3.8

5.4

5.5

5.5.1

5.5.2

5.5.3

5.5.4

5.5.5

5.6

5.6.1

5.6.2

5.6.3

Introduction
Handling and cleaning precautions..

Performance verification

Environmental conditions
Recommended equipment
Multiplexer card connections
Channel resistance tests
Offset current tests
Contact potential tests

......................................................................................................................................................

............................................................................................................

...............................................................................................................................

......................................................................................................................

.....................................................................................................................

................................................................................................................

..........................................................................................................................

...................................................................................................................................

.............................................................................................................................

Bank and channel-to-channel isolation tests
Differential and common-mode isolation tests..

Special handling
Principles of operation

Block diagram
ID data circuits..
Relay control
Relay power
Power-on

Troubleshooting

Troubleshooting equipment
Troubleshooting access
Troubleshooting Procedure

of static-sensitive devices..

..................................................................................................................................

........................................................................................................................................

.....................................................................................................................................

...........................................................................................................................................

control ..............................................................................................................................

safeguard ..............................................................................................................................

.............................................................................................................................................

.................................................................................................................

.........................................................................................................................

..................................................................................................................

.......................................................................................

...............................................................................

..................................................................

.: .........................

5-l
5-l

5-2

5-2
5-2
5-3
5-3

5-5
5-7

5-8
5-12
5-14
5-15
5-15
5-15
5-17
5-17
5-17
5-17
5-17
5-18
5-18

6.1 Introduction

6.2

6.3

6.4

6.5

Parts lists
Ordering
Factory service..

Component

...........................................................................................................................................................

information..

......................................................................................................................................................

6-l

6-l

....................................................................................................................................

................................................................................................................................................

layouts and schematic diagrams..

...........................................................................................

6-1

6-l

6-2

List of Illustrations

Figure 2-l
Figure 2-2
Figure 2-3

Figure 24
Figure 2-5
Figure 2-6
Figure 2-8
Figure 2-7
Figure 2-9
Figure 2-10
Figure 2-11
Figure 2-12
Figure 2-13

Figure 31

Figure 32
Figure 33
Figure 34
Figure 35
Figure 36
Figure 37
Figure 38
Figure 39
Figure 310
Figure 311
Figure 312
Figure 313

Figure 314
Figure 315
Figure 316
Figure 317
Figure 318
Figure 319

Model 7011 simplified schematic.. ........................................................................................................ 2-2

Four 1 x 10 multiplexer configuration (jumpers not installed) ........................................................ 2-3

Two 1 x 20 multiplexer configuration (jumpers installed).

One 1 x 40 multiplexer configuration (jumpers installed) ................................................................ 2-4

Model 7001 analog backplane ............................................................................................................... 2-5

Bank connections to backplane ............................................................................................................. 2-6

Differential switching example

Single-ended switching example .......................................................................................................... 2-7

Sensing example.. .................................................................................................................................... 2-8

SMLJ connectiom ..................................................................................................................................... 2-9

Two separate multiplexer systems ..................................................................................................... 2-10

Multiplexer input expansion example ............................................................................................... 2-11

Mixed card type example ..................................................................................................................... 2-12

Bank-to-bank jumper locations

Bank-to-bank jumper terminal identification .....................................................................................

Bank-to-bank jumper installation

Backplane jumpers.. ................................................................................................................................

Model 7011 screw terminal connector card.. .......................................................................................

Typical screw terminal connections .....................................................................................................

Cable clamp for screw terminal connector card .................................................................................

MI&-pin card terminal identification .................................................................................................

Typical round cable connection techniques ........................................................................................

Model 7011~MTR connector pinout.. ..................................................................................................

Model 7011~KIT-R (with/cable) assembly ........................................................................................

Single card system example (multi-pin connector card).

Single card System example (screw terminal connector card)

Tw-d system example (nxxki-pin connector card).

‘&v-d system example (screw terminal connector card)

Two-mainframe system example (multi-pin connector card).

Two-mainframe system example (screw terminal connector card)

Model 7011-C card jn&lk&m in Model 7001 .................................................................................

7011-S card inst&dion in Model 7001.. .............................................................................................

.............................................................................................................

. .........................................................................................................

...

......................................................................................................... 33

...............................................................

................................................................ 312

........................................................ 3-13

...................................................................

.......................................................... 316

....................................................... 317

............................................... 318

2-3

2-7

32
33

34
3-4

3-5

35
37

39
310
310

3-15

3-20
321

Figure 4-I
Figure 4-2

Figure 4-3
Figure 4-4

Channel status display
Display o*ganization

Model 7011 progr

2-tie resistance testing.. .......................................................................................................................

...........................................................................................................................

for multiplexer channels

amming channel assignments.. ..............................................................................

..................................................................................

4-2
4-3

4-3
4-6

iii

Figure 45
Figure 4-6
Figure 4-7
Figure 48

Figure 49
Figure 4-10
Figure 4-11
Figure 412
Figure 413
Figure 414
Figure 415

Four-wire resistance testing..

Low *&stance testing.. ...........................................................................................................................

Configuration for current gain and common-emitter
Typical common-emitte~ characteristics

Conmcting multiplexer and ma&ix cards together

Resktitity test configuration ...............................................................................................................

Measurement required for resistivity test.. ........................................................................................

Path isolation resistance ........................................................................................................................

Voltage attenuation by path isolation resistance..
Power line ground loops

Eliminating ground loops ....................................................................................................................

................................................................................................................. 4-7

48

test.. ............................................................. 4-10

............................................................................................

411

......................................................................... 4-12

4-13
4-14
4-15

............................................................................ 4-16

......................................................................................................................

4-17
4-17

Figure 5-l
Figure 5-2
Figure 5-3

Figure 5-4
Figure 5-5
Figure 56
Figure 5-7
Figure 5-8
Figure 5-9
Figure S-10

Pati *esistance test connections ............................................................................................................

Differadial offset current test connections ..........................................................................................

Contact potential test comwciions ........................................................................................................

Bank i&&ion test connections.. ............................................................................................................

Channel-to-channel isolMio* test connections ..................................................................................

Differential isolation test connections ................................................................................................

Co-on-mode i.solation test connections.. .......................................................................................

Model 7011 block diagram

................................................................................................................... 5-15

SM and stop sequences.. .....................................................................................................................

T-tit and acknowkdge sequence.. ...............................................................................................

5-4
5-6
5-7

5-8
S-10
5-12
5-14

5-16
5-16

iv

List of Tables

Table 3-1
Table 3-2

Table 4-l

Table 5-1
Table 5-2

Table 5-3
Table 5-4
Table 5-5
Table 5-6

Bank-to-bank jumpers (refer to Figure 3-Z)

Mass termination ~ccessori~

Pa&d Cha.r,r,els in 4-p& Operation . . . . . . .._.._...t...................................................................................

verification equipment.. .........................................................................................................................

Bank is&.tic,n test s-q
Channel-to-channel isolation test mmmary

Differential and ~~-~~-nd.e &&ion &ding. ............................................................................

&co-end& ~~~bk&xdzing equipment..
Troubleshooting procedux

................................................................................................................

.................................................................................................................

.................................................................................................................

.........................................................................................

.....................................................................................

....................................................................................

3-3
3-6

4-6

5-2
5-9

5-11

5-13

5-17

5-19

v/vi

General Information

1.1

This section contains general information about the
Model 7011 Quad 1 x 10 Multiplexer card.

There are two basic versions of this multiplexer card;
the Model 7011-S and the Model 7011-C. The Model
7011-S assembly consists of a screw terminal connector
card and a relay card. External test circuits are wired
directly to the saew terminals of the connector card.
Also available from Keithley is the Model 7011-ST. This
is an extra screw terminal connector card. With an extra

connector card, you can wire a second test system
without disturbing the wiring con@uration of the first
test system.

The Model 7011-C assembly consists of a multi-pin

bmss te

Fxtemal test circuit connedions to the multiplexer are

made via the 96-pin male DIN connector on the con­nector card. Keithley offers a variety of optional acces­sories that can be used to make conneciiom to the
connector card (see paragraph 1.9).

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

1.2 Features

Introduction

rmination) connector card and the relay card.

1.4

Manual addenda

1.5

Safety symbols and terms

1.6

Specifications

1.7

Unpacking and inspection

1.8

Repacking for shipment

1.9

Optional accessories

1.2 Features

The Model 7011 is a low voltage, two-pole, quad, 1 x 10
multiplexer card. Some of the key features in&de:

l

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

l

The connector board detaches from the relay board

allowing easy access to the saew terminals (Model
7011-S) and jumpers.

l

Easy jumper cotiguration of one, two, three or
four multiplexer banks.

l

Backplane jumpers. Cutting jumpers disconnects
multiplexer bank outputs from the Model 7001 an-

alog backplane.

1.3 warranty information

1-l

1.3

Warranty information

1.6

Specifications

Warranty

information

is Located on the inside front

cover of this instruction manual. Should you Model

7011

require warranty service, contact the Keithley rep-

resentative or authorized repair fxility in your area for

further information. When returning the multiplexer

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.

1.4 Manual addenda

Any improvements or changes concerning the multi­plexer card or manual will be explained in an adden­dum inchxded with the card. Addenda are provided in

a page replacement format. Simply replace the obsolete
pages with the new pages.

1

.S Safety symbols and terms

The following symbols and terms may be found on an

ins!mmwnt or used in this manual.

Model 7011 specifications are found at the front of this
manual. These specifications are exclusive of the mul­tiplexer mainframe speci6cation.3.

1.7 Unpacking and inspection

1.7.1 Inspection for damage

The Model 7011 is packaged in a z-sealable, 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 precautions on handling.

Handling Precautions:

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 mainframe,
keep the card in the anti-static bag and store it in the

original packing carton.

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

$

The

symbol on an instrument shows :, nigh
voltage may be present on the terminal(s). L* stan­dard safety precautions to avoid personal contact with
these voltages.

The WARNING heading used in this manual explains

dangers 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 multiplexer card. Such
damage may invalidate the warranty.

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.

1.7.2 Shipping contents

The following items are included with every Model
7011 order:

l

Model 7011 Quad 1 x 10 Multiplexer Card

l

Model 7011 Instruction Manual

l

Additional accessoties as ordered

1-2

1.7.3 Instruction manual

1.8 Optional accessories

The Model 7011 Instruclion Manual is three-hole
driBad so that it can be added to the three-ring binder
of the Model 7001 Inshwtion h4anuaI. 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 pr+
cede the multiplexer card instruction manual.

If an additional instruction manual is required, order
the manual package, KeithIey part number 7011-901-

00. The manual package indudes an instruction manu­aI and any pertinent addenda.

1.7.4 Repacking for shipment

Should it become necessary to return the Model 7011

for repair, carefully pack the unit in ik original packing
carton or the equivalent, and include the following in­formation:

l

Advise as to the warranty status of the multiplexer
card.

The following accessories are available for use with the
Model 7011:

Model 70ll-ST - This screw

terminal

connector card
is identical to the one provided with the Model 7011-S
assembly. An extra screw terminal connector card al­lows you to wire a second test system without disturb­ing the wiring coniiguration of the fist connector card.

Model 7011~KIT-R - This connection kit includes a
96-pin female DIN connector that wiU mate directly to
the connector on the Model 7011-C or to a standard 9&
pin male DIN bulkhead connector (see Model 7011­MTR). This connector uses solder cups for connections
to external circoi~ It includes an adapter for a round
cable and the housing.

Model 7Oll-WC-2 - This 2-meter round cable as­sembly is terminated with a 96-pin female DIN connec­tor on each end. It wiII mate directly to the connector
on the Model 7011-C and to a standard 96-pin male
DIN buIIchead connector (see Model 7011~MTR).

l

Write ATENTION REPAIR DEPARTMENT on the
shipping label.

l

FiII out and include the service form located at the
back of this manuaL

Model 7011-m-This 96pin male DIN buIkhead
connector uses solder cups for connections to external

circu.i&y. It will mate to the Model 7011~KIT-R connec­tor, and Model 7011~MTC-2 cable assembly.

l-3

2

Multiplexing Basics

2.1 Introduction

This section covers the basics for multiplex switching
and is arranged as follows:

Basic multiplex conBgurations: Covers the basic

2.2
multiplex configurations; quad 1 x 10 con+ra­tion, dual 1 x 20 configuration and single 1 x 40
cotiguration. The significance of the backplane
jumpers is also covered here.

2.3

Typical multiplex switching schemes: Explains
some of the basic ways a multiplexer cam be used
to source or measure. Covers single-ended
switching, differential (floating) switching and
sensing.

24 System expansion: Discusses the various config-

urations that are possible by using multiple
cards.

2.2 Basic multiplexer configurations

A simplified schematic of the Model 7011 multiplexer
is shown in Figure 2-l. It is organized as four 1 x 10
multiplexer banks. Each bank has 10 inputs and one
output. Two-pole switching is provided for each multi­plexer input, with HI and LO switched. Two or more
banks can be jumpered together to expand multiplexer
inputs, and backplane jumpers provide bank connec­tions to a second card installed in Model 7001 main­frame.

2-l

Figure 2-l
Mode/ 707 7 simplified schematic

2.2.1 Multiplexer bank-to-bank jumpers

Jumpers are installed on the connector card to connect
multiplexer banks together to form a multiplexer of 1 x

40. Each jum:~ :- set connects two adjacent banks to­gether. These j;-nper sets are included with the Model

7011.

The bank-to-bank jumpers allow you to configure the
multiplexer card in a variety of ways. Typical multi­plexer coniigwations include:

l

Four 1 x 10 rxtitiplexers; no jumpers installed (Fig-

ure 2-2).

Backplane Jumpers

(to 7001 Analog

Bank to Bank

Jumpers

l

Two 1 x 20 multiplexers; Bank A jumpered to Bank

Backplane)

B, Bank C jumpered to Bank D (Figure 2-3).

l

One 1 x 40 multiplexer; all bank-to-bank jumpers
installed (Figure 2-4).

Other combinations are possible, including multiplex-

ers of various sizes (in multiples of 10 channels). For
example, you could install jumpers to configure the
card as one 1 x 30 and one 1 x 10 multiplexer.

Refer to Section 3 for information on installing bank-to­bank jumpers.

2-2

2

Bank A

10. ,

Bank B

Bank C

Bank D

10, ,

Figure 2-2
Four 1 x 10 multiplexer configuration (jumpers not installed)

‘*

1. .’

‘12

,I i ~~--z+O”,utD

Figure 2-3

Two 7 x 20

1. ,x2

Bank 6

109 ,x2 l

1. ,z2

Bank C

10. :2 l

1. ,*2

Bank D

10. ,*2 l

multiplexer configuration (jumpers installed)

.
.

.
.

.

.

2-3

Bank A

inputs

10 ,’

10. ,

,:

;I- Output A

1. ,*2

Bank B

10. ;2

1. ;2

Bank C

10. ./Z

1. ,,2

Bank D

100 ,‘2

One 1 x 40 multiplexer configuration (jumpers

Jumpers

Jumpers

JUllp~S

installedl

2-4

2.2.2 Backplane jumpers

There are four pairs of backplane jumpers located on
the relay card. With the jumpers installed, the banks of

the multiplexer card are connected to the analog back­plane of the Model 7001 allowing expansion

with a sec-

ond 7001 card installed in the mainframe. With the
jumpers removed (cut), the multiplexer card is isolated
from another card installed in the mainframe.

Model 7001

The three-pole analog backplane of the Model 7001
nminframe is shown in Fieure 2-5. Throwh this analog
backplane the banks of a kodel7011 muitplexer car&
installed in one slot, can be connected to the banks (or
rows) of a compatible card installed in the other slot of
the mainframe.

r----

I
I

I
I

I

I

I
I
I

I

Card 1

----

1

I

HS

I I

L

““IG

Ht
L+-----4~L

Analog

Backplane

ROW 1 or Bank A

Row2OrBa”kB I H

L>I

Q-----f

I

ROW 4 or Bank D

9

:A

r----

I

kti

L

‘<G

L

I<
g

Card 2

_---

1

I

I
I

I
I
I

I

L--------l

Figure 2-5

Model 7001 analog backplane

,?-----f”

H = High

L= LOW

G = Guard

L--------l

ROW = Matrix Card (7012)
ea"!i = MUX Card (7011)

2-s

Figure 2-6 shows how each bank of the Model 7011 is
connected to the backplane. Notice that since the Mod-

el 7011 is a twopole card, there is no connection made
to the Guard terminal of the backplane. The Model
7011 is shipped from the factory with the backplane
jumpers installed.

Removing (cutting) the backplane jumpers isolates the
card from the backplane, and subsequently, any card
installed in the other slot. For information on removing
the @mpers, refer to section 3.

NOTE

The Model 7001 does not provide an
analog backplane for the non-701X se­ries cards. As a result, any of these
cads installed in one slot in the main­frame is electrically isolated from any
card installed in the other slot. The
only way to connect a Model 7011 to
one of these cards is to wire them to­gether.

7011
Bank Analog

(1 Of 4)

H\> H
L>

H = High
L=Lcw
G = Guard

Figure 2-6
Bank connections to backplane

Backplane
Jumpers

Backplane

>

7001

L

G

<

<
<

2.3 Typical multiplexer switching schemes

The following paragraphs describe some basic switch­ing schemes that are possible with a two-pole switch­ing multiplexer. These switching schemes include
some various shielding configurations to help mini-

mize noise pick up in sensitive measurement applica­tions. These shields are shown connected to chassis
ground. For some test

prove to be more effective connected to circuit com­mon. Chassis ground is accessible at the rear panel of
the Model 7001.

configurations,

shielding may

2-6

2.3.1 Single-ended switching

2.3.2 Differential switching

In the single-ended switching configuration, the source
or measure instrument is connected to the DLJT
through a single pathway as shown in Figure 2-7. The
insinJml?nt is connectd to the output of one of the
banks and the DUT is shown connect4 to one of the
inputs for that bank.

The differential or floating switching configl.lration is
shown in Figure 2-8. The advantage of using this con­figuration is that the terminals of the scarce or measure
instrument are not confined to the same pathway. Each
terminal of the instrument can be switched to any
available input in the test system.

Figure 2-7
Sing/e-ended switching example

Figure 2-8

Differential switching example

Input l-10

2-7

2.3.3 Sensing
.

Figure 2-9 shows how the multiplexer card can be con-

figured to use instruments that have sensing capability.
The main advantage of using sensing is to cancel the ef­facts of switch card path resistance (43) and the resis-

tame of external cabling. Whenever path resistance is a

consideration, sensing should be used.

2.3.4 SMU connections

Figure 2-10 shows how to connect a Keithley Model

236,237 or 238

Source Measure Unit

to

the multiplexer
card. By wing lkxx cables that are unterminated at one
end, the driven guard and chassis ground are physical­ly extended all the way to the card.

Figure 2-9

Sensing example

Bank C, D

Input l-10

2-8

7011

Lb-

Input l-10

Figure 2- 10
SMU connections

Output LO TriaX

iIT-

WARNING

WARNING

: Hazardous v&ages may be present on

: Hazardous v&ages may be present on

GUARD. Make sure all cable shields are

GUARD. Make sure all cable shields are
properly insulated before applying power.

properly insulated before applying power.

Cables (3)

\

2-9

2.4 Multiplexer expansion

With the use of additional

switching

cards and main­frames, larger systems can be configured. Each Model
7001 Switch System mainframe will accommodate up
to two cards, and up to six mainframes can be connect-

ed together. Thus, a switch system using as many as 12

cards can be configured.

2.4.1 Two-card switching systems

Each Model 7001 Switch System mainframe can ac­commodate two cards to allow the following switching

configurations.

Separate switching systems

Two singie-card systems can be configured by remov-

ing the backplane jumpers from one of the cards. The

two cards will be controlled by the same mainframe,
but they will be electrically isolated from each other.
Figure 2-11 shows an example using two Model 7011
niultiplexer cards.

Multiplexer input expansion
You can double the number of multiplexer inputs by

simply installing two “as shipped” Model 7011s in the
Model 7001 mainframe. By leaving the backplane
jumpers installed, the banks of the multiplexer card in­stalled in slot 1 (CARD 1) are automatically connected
to the banks of the multiplexer card installed in slot 2
(CARD 2) through the analog backplane.

Figure 2-12 shows an example of input expansion.
Each Model 7011 card is configured as four 1 x 10 mul­tiplexers. By connecting the banks together (via Model
7001 analog backplane), the resultant multiplexer sys­tern has 20 inputs for each of the four banks. Notice

that if all the bank-to-bank jumpers (for both cards)

were installed, the result would be a single 1 x 80 mul-

tiplexer.

Card 1

r----

h”kB -

Bankc -

i sm­I-------------

Figure Z- 11

Two separate multiplexer systems

----------

Four 1x10 Muniplexers

7011

._

1

7031 Analog

&.CkplCl”e

/ r---------I-~

L-----------A

Four 1x10 Multiplexers

Card 2

2-l 0

r-------

Card 1

7011

-----,

7Wl Analog

BX.kph”e

Card 2

-----

-------- ----­Quad 1x10 Multiplexers

Quad 1 x20 Multiplexer

Figure 2- 12

Mdripkxer input expansion exampk

Mixing card types
Different types of cards can be used together to create

some unique switching systems. For example, you
could have a Model 7011 multiplexer card installed in
one slot and a Model 7012 matrix card installed in the
other slot.

Figure 2-13 shows a possible switching system using a
matrix card and a multiplexer card. The backplane
jumpers for both the matrix and multiplexer cards
must be installed. This allows matrix rows to be con­neded to multiplexer banks. On the multiplexer card,

the bank-to-bank jumpers must be removed to main-

_-----_---

Quad 1x10 Multiplexers

tain isolation between matrix rows. See the instmction

manual for the Model 7012 for complete information

on the mati card.

2.4.2 Mainframe multiplexer expansion

Multiplexer systems using up to 12 multiplexer cards
are possible by using six Model 7001 mainframes to­gether. Each Model 7011 added to the system provides
40 additional inputs. Paragraph 3.4.3 explains how to

connect a test system using two mainframes.

2-1 ,l

r---- -------

---..--------__

Figure 2- 73

Mixed card type example

Card 1

7012

r------------

Card 2

701

1

------_-__

4xlOMatrix Quad 1 x 10 MUX

Bank A

Bank C

Bank D

---

2-12

3

Card Connections & Installation

3.1

The information in this section is arranged as follows:

3.2

3.3

introduction

WARNING

The procedures in this section are in­tended only for qualified service per-

sonnel. Do not perform these

procedures unless qualified to do so.
Failure to recognize and observe “or­mal safety precautions could result

in personal injury or death.

Handling precautions: Explains precautions that
must be followed to prevent contamination to the
multiplexer card assembly. Contamination could
degrade the performance of the multiplexer card.

Conmxtions: Covers the basics for connecting

extecd circuitry to the two available connector
cards for the multiplexer; the screw terminal con­nector card and the multi-pin connector card.

3.2 Handling precautions

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

To avoid possible contamination, always grasp the re­lay and connector cards 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 build-up over a period of time is another
possible source of contamination. To avoid this prob­lem, operate the mainframe and multiplexer card in a

clean environment.

If a card becomes contaminated, it should be thorough­ly cleaned as explained in paragraph 5.2.

Typical connection schemes: Provides some typ-

3.4

ical connection schemes for single card, two-card

and two-mainframe system configurations.

Model 7Oll ixkallation: Provides a procedure to

3.5

install the multiplexer card assembly in the

Model 7001 mainframe.

3.3 Connections

This paragraph provides the basic information needed

to connect your external teSt circuitry to the multiplex­er. It includes the installation of the bank-to-bank
jumpers on the connector card, insta.Ilation/removal of
backplane jumpers on the relay card, and detailed in-

3-1

fcmnaiion on making external connections tcl the two
available connector cards.

WARNING

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

:~ 3.3.1 Bank-to-bank jumpers

As explained in paragraph 22.1, the banks of the mul-

tiplexer card can be connected together (using plug-in

jumpers) to form larger mukiplexers. The locations of

the bank-to-bank jumper terminals for both connector

cards are

shown in

Figure 3-l.

A. Screw Terminal Connector

Card

Figure 3- 1
Bank-to-bank jumper locations

3-2

6. Multi-pin Connector Card

Terminal identification is provided by Figure 32. On
the drawing, the six terminal pairs are labeled WlOO
through W105. The top three terminal pairs (WlOl,
W103 and W105) are used to connect the LO terminals
of the banks together. The bottom terminal pairs

(WlOO, WI02 and W104) are used to connect the HI ter­minals of the banks together. Table 3-1 summarizes the
effects of each jumper.

Jumper

u--

I I

Jumper Terminal

Lt-

Pair

Bank

AtoB

IFzl

LO

L-A

WlOl

l-S-3

HI

xitir

Figure 3-2
Bank-to-bank jumper terminal identification

Table 3-7

Bank-to-bank jumpers (refer to Figure 3-Z)

,nstalled
jumper Effect

WlOl Connect Bank A LO to Bank B LO
WlOO

w103

w102

ConnectBankAHItoBankBHI
Connect Bank B LO to Bank C LO

ConmxtBmkBHItoBankCHl

Bank

BtoC

h-3

L-2

w103

rr-Tl
m6F

Bank

ctocJ

E--G-l

L-4

w105

r&--a

L-d

WI04

Figure 3-3
Bank-to-bank jumper installation

3.3.2 Backplane jumpers

The Model 7001 mainframe has an analog backplane
that allows the banks of a Model 7011 multiplexer to be
internally connected to a compatible
stalled in the other slot (see paragraph 2.4.1 for details).

The backplane jumpers for the multiplexer card
assembly are located on the relay card as shown in
Figure 3-4. The card is shipped from the factory with

the jumpers installed.

Jumper removal
Perform the following steps to remove backplane

jumpers:

switching

card in-

w105 Connect Bank C LO to Bank D LO
w104 ConnectBankCHItoBankDHl

Referring to Figure 3-l for jumper locations, perform
the following steps to install bank-to-bank jumpers:

1. If mated together, separate the relay card from the
comector card by removing the mounting screw
and pulling the two cards away from each other.
Remember to only handle the cards by the edges
and shields to avoid contamination.

2. Refer to Figure 32 and Table 31 to determine
which jumpers to install.

3.

Using Figure 3-3 as a guide, install the jumpers on
the appropriate terminal pairs.

1. If mated together, separate the relay card from the
connector card by removing the mounting screw
and pulling the two cards away from each other.
Remember to only handle the cards by the edges
and shields to avoid contamination.

2. Use Figure 3-4 to locate the jumper(s) that are to be
removed.

3. It is not necessary to physically remove the jump­ers from the PC board. Using a pair of wire cutters,
cut one lead of each jumper.

3-3