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Model 7052 4 x 5 Matrix Card
Instruction Manual
Contains Operating and Servicing Information
ALNVIIIIVM 40 NOIlVlIWll
AlNV?RlVM
Model 7052 4 x 5 Matrix Card
Instruction Manual
01990, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Document Number: 7052-901-01 Rev. D
Safety Precautions
The following safety precautionsshould be observedbefore "sing this product and any u-
so&ted iosmm~entadon.Akhougb some insmmems and accessorieswould eonnatty be
used with non-hazardousvotwges. there are siluelions where hazardousconditions may be
present.
This product is intended for "se by qualified Qenonnet who recognize shock hazards cod
ure familiar with chcsafery precautionsrequired IO avoid possible injuly. Read the operet-
inp information carefully before using the product.
The rypes of product "sets are:
Responsible body is the individual or group responsiblefor the "se and maintenance of
equipment. and for ensuring thar operatorsare adequarelytrained.
Operators use the product for ix intended function.They m"st be uained in electice, safe-
ty proceduresand proper "se of the instrument.They m"st be Qrotecredfrom elearic shock
and coomct with hazardouslive circuits.
Maintenance personnel perform routine procedures the productto keep icopenring. for
on
example. setting the tine voltage or replacing consumable materials. Meiinrenanceproce-
dures are described in rhe manual. The proceduresexplicitly state if the operator may per-
form rhem. Otherwise, they should be performed only by sewice personnel.
Service Qersouoei ax mined to work on live circuito. and perform safe insratlations and
repairs of products. Only properly trained service Qenonnet may perform installorion and
service procedures.
Exercise extreme caution when a shock hazard is Qresenr.Lethal voltage may be presenton
cebte connectorjacks or test fixtures. The Amedcen Narional Sreodilrds Institute (ANSI)
statesthat a shock hazard exists when voltage levels grearer than 30" RMS. 42.4V peak,
"I 60"DC are present. A good safety practice is to expect thal hazardous voltage is
prevent in any unknown circuit before measuring.
"sen of lhis product m"st b-eprotected from electric shock at all times. The responsible
body ~"SI ensure &et "sea ue prevented accessand/or insulated from every connection
point. In some cases,connectionsmust be exposed10 potential human contec~.Product "s-
en in rhese circ"msm"ce~ roust be tined to Qmtect themselves from the risk of electric
shock. If the circuit is capable of operating at or above too0 volt% no conductive part of
the circuit may be expqsed.
As~describedin the lntemarional Elecuotecbeical Commission (IEC) Standard IEC 664.
digital multimeter measuring circuits kg.. Keitbley Models 17%. 199. ZOOO. 2001.2Mn.
and 2010) mrawring circuits are Installation Category Lt.AtI other iostmmeots signal ter-
minats me lnsrallarion Category Fend must "or be connectedIO mains.
Do "at connect swircbing cards directly IO unlimited power cireuiu. They an: intended to
be "red with impedance limited sources.NEVER connect switching cards direcrly to AC
mnins.When connecringsourcesID swirching cards.install prorecrivedevices IO limir fault
current and voltage to tbe card.
Before oprnting an instiment. make sure the line cord is conneeredm a properly ground-
ed power receptacle. lnspecl rhe connecting cables. lest leads. and jumpers for porribie
wear, cracks, or breaks before each "se.
For maximum safety, do "or touch the product. test cables. or any orher instmments while
power is applied m the circuit under test. ALWAYS remove power from the entire lest sys-
rem and discharge any capacitors before: connecting or disconnectingcables or jumpers.
installing or removing switching cnrds.or making internal changes.such as insralling or m-
moving jumpers.
Do nat touch any object tbnt could provide a current path IO the common side of the circuit
under test "I power line (emth) ground. Always make mea.weme"ts with dry hnndr while
standingon " dry, insulated surface capable of withstanding the voltage being measured.
Do not exceed the maXimum signal levels of the instmmenrsand accessories,psdefined in
the rpecificationsand opemting informarion, and as shown on the insu'"mentor lest fixcure
pmek, or switching card.
When fuses arc used in a product, replace with snme type and raring for continued prorec-
don against fire hazard.
Chassisconnectionsmust only be used as shield connectionsfor measuring circuits. NOT
as snfefery
ea.,,h ground connecdons.
If you an "sing a IW fixture, keep the lid closed while power is applied to the device under
lest. Safe operation requires tie "se of a lid interlock.
If"@ screw ir present,connect it to safety earth ground "sing rhe wire recommendedin
the "ser documentarion.
The A symbol on an instmmem indicates that the "ser should refer 1" the opemting in-
svucdons locnted in Ihe manual.
Them symbolona,, insm,me"tnhows ths,itcBn s""rceormea~"n lwO"olls ormore.
including the cambined effect of normal and cmnm"" mode voltages. "se srandardsafely
pcecaudanrto avoid penonal contact with these voltages.
The WARNING beading in " manual explains dangersthat might res"lt in penonal injury
or death. Always read the associatedinformation very carefully before performing the in-
dialed procedure.
The CAUnON hending in a manual explains hazards thnt could damage the insuument.
Such dam"ge may invalidare the warranty.
Inswmentation and accessories
shall not be connected10 humnns.
Befom performing any ~aimenance. disconnectthe line cord and all test cables.
To maimin protection from elecriic shock and fire. replacement companenu in mains cir-
cuits. including the power transformer. test leads. and input jacks. m"st be purchasedfrom
Keitiey Inammems. SIandad fuses. with applicable national safety approvals. may be
"red if the mdng nnd type we the same. Other componemr that tre not safety related may
be purchasedfrom other suppliersas long BS they we equivalent 10 the original componem.
(Note that selected pmts should be purchasedonly rhmugh Keithley lnstmmenu 10 main-
rain ~ccumey and functionality of the product.) If you M ""~"n about the applicability of
n mplacemenr component, call a Keithley lnstmments office for information.
To clean the inswmem, we a damp cloth or mild. water based cleaner. Clean the exterior
of the instmment only. do "m apply cleaner directly 10 the instmmem or ~IUOWliquids 10
enter or spill on the instmmem.
SPECIFICATIONS
MODEL 7052 4 x 5 MATRIX CARD
CHANNEL CONFIGURATION: 4 x 5.
CONTACT CONFIDURATION: 3-p& Farm A, High, Low and Guard.
CONNECTOR TYPE: Quick Disconnect screw terminals, No. 16 AWG maximum.
RELAY DRIVE CURRENT: 15mA (per relay).
SIGNAL LEVEL: ZOOV.2WmA or 1OVA peak non-inductive load only.
CONTACT LIFE: 1CP closures (cold switching); 10' closures (maximum signal level).
CONTACT RESISTANCE: CONTACT POTENTIAL: <20&V per any contact pair.
ACTUATION TIME: CHANNEL ISOLATION: >113'~fland <5pF; 60dB into 5Ofl @lMHz.
INPUT ISOLATION, DIFF: >109fl and <50pF typical.
INPUT ISOLATION, CM: >lO"lI and OFFSET CURRENT: COMMON MODE VOLTAGE: 2WV peak.
ENVIRONMENTAL, OPERATING: 0' to 5O'C. up to 35'=Cat 70% R.H.
ENVIRONMENTAL, STORAGE: -25' to t65'C.
DIMENSIONS, WEIGHT: 32mm hi b x 114mm wide x 227111111 long(1'~" x 4%",
x 10%"). Net weight 0.61kg (2k .5 oz.).
Spectfications subject to change witbout notice
TABLE OF CONTENTS
SECTION 1 GENERAL INFORMATION ................ ......... 1
1.1 Introduction ................................................ 1
1.2 Warranty Information ........................................ 1
1.3ManualAddenda ............................................ 1
1.4SafetySymbolsandTsrms .................. . ................. 1
SECTION 2 OPERATION ............... .................... ... 3
2.1 Introduction ............................... : ................. 3
2.2Wiring ..................................................... 3
2.3 lnstallotion .................................................. 4
2.4 Operating Considerations, ........... ,J, ....................... 4
2.5 Mainframe Front Panel Operation .............................. 5
2.6 IEEE Bus Operation with the Model 7052 Matrix Card .............. 7
2.7SwitchTerminology.. ....................................... 7
SECTIONJSERVICING INFORMATION ........................ 9
3.1 Introduction ................................................ 9
3.2Handling ................................................... 9
3.3 Required Test Equipment, .................................... 9
3.4 Performance Verification ..................................... 9
SECTION4 REPLACEABLE PARTS., ........................... 11
4.1 Introduction ................................................ 11
4.2ReplsceebleParis ........................................... 11
4.3 Ordering Information ........................................ 11
4.4FactoryService ............................................. 11
4.5 Component Layout and Schematic Diagram ..................... 11
4.6 Special Handling of Static Sensitive Devices ..................... 13
SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
The Model 7052 is a configured 4 x 5 (4 rows by 5 columns) channel cross
point matrix card wth 3-p&? Form A lnormally open) switching for HI, LO
ond GUARD. Designed for general purpose signal switching, the matrix
switching scheme offers the flexibility to connect any one point to another.
The card is field installable in an appropriate Keithley mainframe (eg. Model
705 or Model 706). The switching is accomplished in loss than Zmsec lex-
elusive of mainframe) and then specified relay life is 107~lo~~res at maximum
signal levels. Quick disconnect scwv terminals INo. 16 AWG maximum1 we
used to facilitate input and output connections to the matrix scanner card.
The scanner mainframe must be in the matrix mode IProgram 6, number 0,
available in 85 or later software for the Model 705) in order to operate the
Model 7052 matrix card.
1.2 WARRANTY INFORMATION
Warranty information is stated on the inside front cover of the manual. If
there is B need for service. contact the Keithley representative 01 authorized
repair facility in your area. Check the back cover of this manual for ad-
dresses. The service form supplied at the snd of the manual should be used
to provide the repair facility with adequate information concerning any dif-
ficulty.
1.3 MANUAL ADDENDA
Improvements or changes to this manual will be explained on an addendum
included with this manual.
1.4 SAFETY SYMBOLS AND TERMS
The symbol m on the instrument denotes that the user should refer to the
operating instructions.
The symbol fld enotes that a high voltage may be present on the
terminalisl.
The WARNING used in this manual explains dangers that could result in
personal injur, or death.
The CAUTION used in this manual sxplains hazards that could damage the
instrument.
112
SECTION 2
OPERATION
2.1 INTRODUCTION
This section provides information needed to us8 the Model 7052 matrix card
with an wxopriate Keithley scanner mainframe (e.g. Model 705).
2.2 WIRING
Each crosspoint on the Model 7052 matrix card consists of one 3.~01~ Form
A lnormally open) switching relay. The 3.pole relays allow HI, LO and
GUARD to be switched. The matrix of the relays on each card is configured
with four rows and five columns hence. the 4 x 5 matrix. Each Model 705
mainframe can accomodate two cards and each Model 706 mainframe can
accomodate 10 cards. By wiring the rows or columns of one card to the rows
or columns of another card, the matrix can be increased to 4 X 10 or 6 x 5
depending on the wiring (refer to Figures 1 and 2). With the Model 706 much
larger matrixes can be realized, such 8s 4 x 50, 8 x 25, 12 x 15, etc. All
literature pertaining to the Model 7052 will refer to the matrixes by row8 and
columns. Where rows 818 the first number and columns are the second
number.
Since the matrix card is configured 8s B 4 x 5 matrix, the input and output
connections can be configured at the user's discretion (one input with many
outputs, or many inputs with one output). Quick disconnect screw terminals
INo. 18 AWG maximum) are used to facilitate the input and output connsc-
dons.
Flgure 1. Simplified Schematic of a 4 x 10 Matrix
3
NOllWllWlSNI E'Z
Signal Levels-The normal signal levels that the Model 7062 matrix card
operates at are 1OV f2OOV maximumlllOmA 1200mA meximum). The load
should only be resistive and 1OVA is the maximum switching level with a
resistive load. The contact life pf the relays with normal signal 1avels is l@
c!osures. At maximum signal levels the number of closures is degraded by a
factor of 10.
WARNING
When switching signals greater than 30V rrns or 424,
peak teke care fo prevent contact with live circuits which
cpuld cause an electrical shock resulting In injury or
death.
NOTE
Reactsnces in the system will cause switching transients. These
transienfs should not exceed the rating specified. If they do, the
transients can degrade the relay life.
External Conslderstians-The Model 7062 specifications are based on a
resisfivo load; however, external circuit capacitances and reactances can
C~USB excessive currents and voltages to appear awas the relay contacts.
The currents and voltages must be limited to within the contact ratings.
1. Capacitance-Charged capacitance in the circuit can CBUSB excessive
currenfs (surge currents1 to flow through the contac1s. if the source is
sharisd out or the output is switched to cspacitancr, loads. This ~xces&e
current CB" weld the relay contacts together. Therefore, use series
resistors where needed to limit the maximum current that can flow. For
example, a DC power supply specification may indicate that the output
current is limited to 10mA. However. because of internal capacitors con.
netted woss the power supply output, high surge currents c8n easily
flow through the relay contacts. If thsy are shorted or when switched 10
reactive loads a surge may result. The surge current con be very high and
may be only a few microseconds in duration but they can still weld the
relay contacts together. The currents must be limited to within the con-
tact ratings of the relay which are given in the specifications.
2. Inductance-The inductance of cables can produce high vokags and
arcing across die relay contacts when switching. The peak transiarts
must be limited to within the contact ratings which are given in the
specifications.
3. Cables-Shielded cables should be used with the Model 7052 card when
switching signals greater than SOV. The shield should be connected to the
circuit LO or GUARD. This helps prevent excess/w radiation from the
cables from interfering with any equipment.
2.6 MAINFRAME FRONT PANEL OPERATION
Using the Model 7052 matrix card with an appropriate Keithley mslnframe
lag. Model 706 or Model 7061 requires that the matrix mode be eciivsted. To
activate the matrix mode, press the following buttons on the mainframe's
front panel:
1. Press PRGM. 6
2. Press 0, ENiER
After the ENTER button Is presed, the mslnframe is placed in the matrix
mode. In the matrix mode the display uses the followlng format:
nn m 0 or C (Model 705 display1
where the Model 705 display is:
nn = two digit number displaying the column, card and unit number.
m = the row from 1 to,4
0 or C denotes crosspoint is open or closed
nnn m o or c (Model 706 display)
where the Model 706 display is:
nnn = three digit number displaying the column, card and unit number.
m = the row from 1 to 4
o or c denotes the crosspoint is open or closed.
2.6.1 Model 705 Matrix Operation
For example the following display on the Model 705 means:
L_or.~-~~T,
where:
04 denotes first unit 101- 10 denotes unit #ll
04 also denotes first card 101-05 denotes card #I. top card)
04 also denotes fourth column of above card 101-05 denotes columns of
card #l I
3 denotes third row
C denotes the crosspoint is closed
Therefore, the display 04 3 C means that the crosspoint on unit #l, card #l.
column b'4, row #3 is closed.
As another example, the following display on the Model 705 means:
m-r_l
where:
07 denotes first unit (01-10 denotes unit h'll
07 also denotes second card (06-10 denotes card #2. bottom card1
07 also denotes second column IOB-10 denotes columns of card #21
2 denotes second row
C denotes crosspoint is closed
Therefore, the display 07 2 C means that the crosspoint on unit #l, card #2.
column n2. row #2 is closed.
As another example, assume there are five daisy chained Model 705s and
each unit has two matrix cards. In this case the following display means:
I3201
where:
43 denotes fifth unit 141-50 denotes unit #5l
43 81~0 denotes card #l (top card1 I41 -45 df
43 ho denotes column #3 (41-45 denotes columns of card #l)
2 denotes row n2
a denotes the crosspoint is open
Therefore, the display 43 2 0 mesns that the crosSpoint af unit #6, card #l,
column #3. row#2is open.
6
NOTE
In the example of the five daisy chained Model 705s the
display is taken from the master unit of the daisy chain
configuration. Refer to the mainframe's instruction manual
for complete details of daisy chain operation.
To select the desired crosspoint press the digit corresponding to the desired
unit, card, column and row. To open the selected crosspoint press the OPEN
button. To close the selected crosspoint press the CLOSE button. Far com-
plete front panel mainframe operation refer to the mainframe's instruction
manual.
2.5.2 Model 706 Matrix Operation
As an oxample of the Model 706 matrix display consider the following
display.
where:
005 denotes unit #l (001-050 denotes unit #11 Refer to Table 2-19 of
Model 706 Instruction Manual.
005 illso denotes card slot #l foot-010 denotes card slot 111 Refer to Table
2.20 of Model 706 instruction Manual.
005 also denotes column #5 (001-005 denotes columns of card #tl
2 denotes row #2
o denotes the crosspoint is open
Therefore, the Model 70Gdisplay 005 2 o means that the crosspoint of unit
#t. card slot #l, column #5, row #2 is open.
As another oxample.of the Model 706 matrix display consider the following
display.
Lp-;II~~.-. ~,,
where:
027 denotes unit #l 1001-050 denotes unit #lb Refer to Table 2-19 of
Model 706 Instruction Manual.
027 also denotes card slot #6 (026-030 denotes card slot #Gl Refer to
Table 2.20 of Model 706 instruction Manual.
027 also denotes column #2 lO26-030 denotes columns of card #I31
3 denotes row n3
c denotes the crosspoint is closed
Therefore, the Model 706 display 027 3 c metms that the crosspoint of unit
Ill, card slot #6, column #2. row #3 is closed.
As another example of the Model 706 matrix display assume that there are
five daisy chained Model 706% The following display is defined 0s:
where: