Keithley 7169 User manual

Model 7169 General PurposeScannerCard
Instruction Manual
Contains Operating and Servicing Information

WARRANTY
LIMITATION OF WARRANTY
STATEMENT OF CALIBRATION

Model 7169
General Purpose Scanner Card
Instruction Manual
01989, Keithley Instruments, Inc.
All rights reserved.
Cteveland, Ohio, U.S.A.
First Printing, July 1989
Document Number: 716Y-901.01 Rev. A

All Keithley product names are trademarks or registered trade,
marks 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 the
Model 7169 and the associated instruments.
This card is intended for use by qualified personnel who recognize
shock hazards and are familiar with the safety precautions required to
avoid possible injury. Read over this manual carefully before using the
card.
Exercise extreme caution when a shock hazard is present at the test cir-
cuit. User-supplied lethal voltages may be present 011the PC board. The
American National Standards Institute (ANSI) states that a shock haz-
ard exists when voltage levels greater than 30V RMS or 42.4V peak are
present. A good safety practice is to expect that hazardous voltage is
present in any unknown circuit before measuring.
Do not exceed500V peak between any two pins or between any pin and
earth ground.
Inspect the connecting cables and test leads for possible wear, cracks, or
breaks before each use.
For maximum safety, do not touch the test cables or any instruments
while power is applied to the circuit under test. Turn off the power and
discharge any capacitors before connecting or disconnecting cables
from the card.
Do not touch any object which could provide a current path to the com-
mon 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 card, as defined in the
specifications and operation section of this manual.

Model 7169 20 Form C Switch Card
CHANNELS PER CARD: 2.0independent Form C. All poles available
at connectors. Replacement of factory installed jumper allows
current limit resistor in series with common of each channel. On-
card bus allows for addition of jumper to change configuration from
switch to multiplex. Bus also allows channel interconnection.
CONNECTOR TYPE: 3 x 20 pin mass termination.
RELAY DRIVE CURRENT: 3OmA per relay typical.
MAXIMUM SIGNAL LEVEL: 500V peak, 0.5A rms switched, 1A rms
carry, 1OW (resistive load only).
CONTACT LIFE: >108 closures cold switching; >107 closures at
maximum signal levels.
CONTACT RESISTANCE: <2Q to rated life.
CONTACT POTENTIAL: <3OkV, C to NO or NC.
ACTUATION TIME: <lmsec., exclusive of mainframe.
CHANNEL ISOLATION: >109Q, <150pF.
INPUT ISOLATION: >lOgQ <150pF.
COMMON MODE VOLTAGE: 500V peak.
OPERATING ENVIRONMENT: 0” to 55”C, up to 35°C at 70% RH.
STORAGE ENVIRONMENT: -25’ to 65°C.
DIMENSIONS, WEIGHT: 32mm high x 114mm wide x 272mm long
(1.25 in. x 4.5 in. x 10.75 in.). Net weight 0.54 kg (19 oz.).
Specifications subject to change without notice.

Table of Contents
SECTION 1 - General Information
1.1 INTRODUCTION
1.2 WARRANTYINFORMATION
1.3 MANUAL ADDENDA
1.4 SAFETY SYMBOLS AND TERMS
1.5 SPECIFICATIONS
1.6 UNPACKING AND INSPECTION
1.6.1 Inspection for Damage
1.6.2 shipping Contents
1.6.3 Instruction Manual
1.7 REPACKING FOR SHIPMENT
1.8 OM’IONALACCESSOIXES
SECTION 2 - Operation
l-l
1-l
1-l
l-2
l-2
l-2
l-2
l-3
l-3
l-3
l-3
2.1 INTRODUCTION ......................... 2-l
2.2 HANDLING PRECAUTIONS ................ 2-l
2.3 EQUIVALENT CIRCUIT .................... 2-2
2.4 MLKTI-CARD CONFIGURATIONS ........... 2-2
2.5 CONNECTIONS _.., _, ., _.., ..__ __ 2-6
2.5.1 Connections Using Model 7169~KIT 2-6
2.5.2 Connections Using Model 7169-MTC Cable 2-10
25.3 Shielded Cables 2-12
2.6 CARDINSTALLATIONANDREMOVAL 2-12
2.6.1 Scanner Card Installation 2-12
2.6.2 Scanner Card Removal 2-14
2.7 MAINFRAME CONTROL OF SCANNER CARD 2-14
2.7.1 Matrix Mode 2-14
2.7.2 Multi-Channel Svstems 2-18
2.7.3 Scanner Switch&g Control 2-18
2.7.4 ReactiveLoads ,__._.__..,,__,,....._.. 2-19

SECTION 3 - Applications
3.1 INTRODUCTION 3-l
3.2 COUPON TESTING 3-l
3.3 CABLING INSULATION TESTING 3-2
SECTION 4 - Service Information
4.1 INTRODUCTION 4-l
4.2 HANDLING AND CLEANING PRECAUTIONS 4-l
4.3 PERFORMANCE ~RIFICATION 4-2
4.3.1 Environmental Conditions 4-2
4.3.2 Recommended Equipment 4-2
4.3.3 Connector Preparation 4-2
4.3.4 Channel Isolation Tests 4-3
4.3.5 Input Isolation Tests 4-8
4.3.6 Path Resistance Tests 4-10
SECTION 5 - Replaceable Parts
5.1 INTRODUCTION .......................
5.2 PARTSLISTS ..........................
5.3 ORDERING INFORMATION ..............
5.4 FACTORY SERVICE .....................
5.5 COMPONENT LAYOUT AND SCHEMATIC
DIAGRAM ............................
5-l
5-1
5-l
5-l
5-2

List of Illustrations
SECTION 2 - Operation
Figure 2-I
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Figure 2-6
Figure 2-7
Figure 2-8
Figure 2-9
Figure 2-10
Model 7169 Simplified Schematic
Multi-Card Configuration
Separate Outputs Configuration
Connectors on Scanner Card
(Pin Side Shown)
Female Connector Pin Identification
(Terminal Crimp Side Shown)
Model 7169-MTC-10
Card Installation in Model 705
Card Installation in Model 706
Limiting Capacitive Reaction Current
Limiting Inductive Reaction Voltage
SECTION 3 -Applications
Figure 3-l Coupon Insulation Resistance Testing 3-2
Figure 3-2 Cabling Insulation Testing 3-3
SECTION 4 - Service Information
Figure 4-1
Figure 4-2
Figure 4-3
Channel Isolation ...............
Input Isolation ............ ....
Path Resistance .................
2-2
2-4
2-5
2-6
2-7
2-10
2-13
2-14
2-19
2-21
4-5
4-9
4-11

List of Tables
SECTION 2 - Operation
Table 2-l
Table 2-2
Table 2-3
Table 2-4
Connector Pin Identification 2-8
Model 7169-MTC Conductor Identification 2-11
Scanner Control of Model 7169 Matrix
Mode (O-Pole) 2-16
Model 705 Channel Assignments in O-Pole
Mode . . . . . . . . . . . . ..t............. 2-18
SECTION 4 - Service Information
Table 4-l Verification Equipment 4-3
Table 4-2 Connector Pin Identification 4-6

SECTION 1
General Information
1.1 INTRODUCTION
Thissectioncontainsgenerali~~formationabouttheModel7169 General
Purpose Scanner Card.
1.2 Warranty Information
1.3 Manual Addenda
1.4 Safety Symbols and Terms
1.5 Specifications
1.6 Unpacking and Inspection
1.7 Repacking for Shipment
1.8 Optional Accessories
1.2 WARRANTY INFORMATION
Warranty information is located on the inside front cover of this instruc-
tion manual. Should your Model 7169 require warranty service, contact
the Keithley representative or authorized repair facility in your area for
further information. When returning the scanner card for repair, be sure
to fill out and include the service form at theback of this manual in order
to provide the repair facility with the necessary information.
1.3 MANUAL ADDENDA
Any improvements or changes concerning the scanner card or mar\ual
will be explained in an addendum included with the unit. Be sure to
note these changes and incorporate them into the manual.
l-l

SECTION 1
Genend Infomntion
1.4 SAFETY SYMBOLS AND TERMS
The following symbols and ternx may be found on an instrument or
used in this manual.
The symbol A 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.
The WARNING heading used in this ~nanual explains dangers that
nxight result in personal injury or death. Always read the associated in-
formation very carefully before performing the indicated procedure.
The CAUTION heading used in this manual explains hazards that
could damage the scanner card. Such damage may invalidate the war-
ranty.
1.5 SPECIFICATIONS
Model 7169 specifications may be found at the front of this manual.
These specifications are exclusive of the scanner mainframe specifica-
tions.
1.6 UNPACKING AND INSPECTION
1.6.1 Inspection for Damage
The Model 7169 is packaged in a resealable bag to protect it frown con-
tamination that could degrade performance. Before removing the card
from the bag, observe the following precautions on handling.
1-2

1
2
Always grasp the card by the side edges. Do not touch the edge con-
nector, board surfaces or components.
When not installed in the mainframe, keep the card in the bag and
store in the original packing carton. After removing the card from
the bag, inspect if for any obvious signs of physical damage. Report
any such damage to theshippingagent immediately. Save the origi-
nal packing carton for possible fuhue reshipment.
1.6.2 Shipping Contents
The following items are included with every Model 7169 order:
l Model 7169 Scanner Card
l Model 7169 Instruction Manual
* Additional accessories as ordered
1.6.3 Instruction Manual
If an additional instruction manual is required, order the manual pack-
age,Keithleypart~~utnber7169-901-00.Themanualpackageincludesan
instruction manual and any pertinent addenda.
1.7 REPACKING FOR SHIPMENT
Should it become necessary to return the Model 7169 for repair, care-
fully pack the unit in its original packing carton or the equivalent, and
include the following information:
. Advise as to the warranty status of the scanner card.
l Write ATTENTION REPAIR DEPARTMENT on the shipping label.
a Fill out and include the service form located at the back of this man-
ual.
1.6 OPTIONAL ACCESSORIES
The following accessories are available from Keithley for use with the
Model 7169:
1-3

Model 7169-MTC-10-Tl~eModel7169-MTC-10is a lo-foot, cable that
allows connection between the 7169 and the supplied mating connec-
tors (7169-KIT)
Model 7169-KIT-The Model 7169XIT mates to the scanner card con-
nectors.
Model 7169-MTR -The Model 7169-MTR is a bulkhead mount con-
nector that mates to the Model 7169-MTC-10.
1-4

SECTION 2
Operation
2.1 INTRODUCTION
This section contains information on aspects of scanner card operation
and is arranged as follows:
2.2 Handling Precautions: Details precautions that should be observed
when handling the scanner card to ensure that its performance is not de-
graded due to contamination.
2.3 Equivalent Circuit: Provides the simplified scanner card circuit for
the Model 7169.
2.4 Multi-Card Configurations: Explains two basic methods for using
multiple cards; common OUTPUT and separate OUTPUTS.
2.5 Connections: Explains the various methods and techniques that
can be used to make connections to the xanner card.
2.6 Card Installation and Removal: Covers the basic procedure for in-
stalling and removing the card from the scanner mainframe.
2.7 Mainframe Control of Scanner Card: Covers operating aspects
specific to the Model 7169.
2.2 HANDLING PRECAUTIONS
To maintain high impedance isolation, care should be taken when han-
dling the scanner card to avoid contamination from foreign materials
such as body oils. Such contamination can substantially increase leak-
age currents, degrading performance.
2-1

SECTION2
Operation
To avoid possible contamination, always grasp the card by the side
edges, Do not touch the edge connectors of the card and do not touch
board surfaces or components. When not installed in a mainframe, keep
the card in the bag and store in the original packing carton.
Dirt build-up over a period of time is another possible source of con-
tamination. To avoid this problem, operate the mainframe and scanner
card only in a clean environment.
If the card should become contaminated, it should be thoroughly
cleaned as explained in paragraph 4.2.
2.3 EQUIVALENT CIRCUIT
Figure 2-l shows the equivalent circuit of the Model 7169.
Each channel is a single-pole, double throw (l-Form C) isolated switch.
The factory installed jumper in series with the COMMON terminal can
be removed if a limiting resistor is required. Two undedicated on card
buses are available for intracard connections
Figure 2-l. Model 7169 Simplified Schematic
2.4 MULTI-CARD CONFIGURATIONS
Typically, multi-card systems are configured by connecting one or more
of the terminal blocks of all the scanner cards together. An example of
2-2

SECTION 2
Operatimi
this type of configuration is shown in Figure 2-2, which connects the
common and normally closed pins of a three-card system together. This
common output system allows a single piece of equipment to operate all
60 channels.
Another possible way to configure a multi-channel system is with sepa-
rate outputs. Figure 2-3 shows a two-card system with separate out
puts. With this type of configuration, more than one test system can be
controlled by the master mainframe.
2-3

SECTION 2
Opemtion
Ch40
Ch41
Ch60
CXd
2 c 0
NC 0
Cd
3 C
NC
=I I
Figure 2-2. Multi-Card Configuration
2-4

SECTION 2
Opemiotr
Ch21
Card
CL
2 c
NC o”tp”t2
NO
Ch40
Figure 2-3. Sepnrate Outputs Configurntion
2-5

SECTION 2
Operation
2.5 CONNECTIONS
CAUTION
Contamination will degrade the performance of the scan-
ner card. To avoid contamination, always grasp the card by
the side edges. Do not touch the board surfaces or compo-
nents.
Figure 2-4 shows the connectors on the scanner card. Table 2-l refer-
ences scanner card terminals to connector pins and channel numbers.
For example, Channel 1common is connected to pin A of J102 and Chan-
nel 1 normally-open is connected to pin B of J103.
?I
l- PC
Board
%wre 2-4. Connectors on Scanner Card (Pin SideShown)
The connector on the scanner card will mate to either a connector
(Model 7169~KIT) or to an optional mass terminated cable (Model
7169-MTC-10).
The following procedure explains how to mate the connector to the
Model 7169.
1. Mate the female connector to the male connector on the PC board.
2. Tighten the jackscrew finger tight. This is the locked position and
secures the connectors together.
2.51 Connections Using Model 7169.KIT
The Model 7169-KIT is a connector that mates to the connector on the
back panel of the Model 7169. Cabling from instrumentation and DUTs
2-b