708_901_01B.pdf part of Keithley 708 901 01B 708_901_01B.pdf, Keithley 708 708_901

Text preview for : 708_901_01B.pdf part of Keithley 708 901 01B Keithley 708 708_901_01B.pdf

Back to : 708_901_01B.pdf | Home

Model 708
Switching System
Instruction Manual

Contains Operating and Servicing information
WARRANTY
Keithley Instruments, Inc. warrants this product to bc free from defects in material and workmanship for a period of I year from date of
shipment.

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

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

To cxercisc this warranty, write or call your local Kcithley 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 bc made and the product returned, transportation prepaid. Repaired or replaced products xc warranted for the balance of the origi-
nel warranty period, or at least 90 days.

LIMITATION OF WARRANTY
This warranty dots not apply to defects resulting from product modification without Kcithley's express written consent, or misuse of
any product or part. This warranty also does not apply to fuses, software, non-rcchargcablc batteries, damage from batcry lc&agc, 0~
problems arising from normal wear or failure to follow instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCI.UDING 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, INDI-
RECT, 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. - 28775 Aurora Road-Cleveland, OH 44139 - 216-248-0400 - Fax: 216-248-6168 - http://www.keithley.com
Model 708 Switching System
Instruction Manual

01996, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Second Printing. lunc 1997
Document Number: 708-90-01 Rev. R
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 relcascd between Revi-
sions, contain important change information that the user should incorporate immediately into the manual. Addenda arc num-
bered sequentially. When a new Revision is created, all Addenda associated with the previous Revision of lhc manual are
incorporated into the new Revision of the manual. Each new Revision includes a revised copy of this print history page.

Kcvisim A (DocumentNamhcr708-901-01)....................................................................................14%
Pcbruary
Addendutn (Dncument
A Number X18-901 .......................................................................................
-02) Mily ,996
*ddc"dumA ~""cumentNumber .......................................................................................
708~901-03~. July 1Wh
..........................................................................................
RWiSi"" B (Ihcumcnt Nunlhcr7"%9"1~"1). JU"C,997
Safety Precautions

The following safety precautions should he obsaved before using Users OS his product must be pro,ecwtt from elcclric shock ia illI
this product and any associated instrumcnlation. Although some in- times. The responsible body must c~wrc dun oscr\ xc prcvcwxt
struments and accessories would normally be used with non-baz- access and/or insutaled from every conneclion point. In some CIISLIS.
ardous voltages, there arc situations where huardous conditions connections most bc cxposcd 10 polenlial buman COIIIWI. Product
may bc present. users in these circunx~mccs must he trained to protect thcmsclvcs
from the risk ofelecLTic shock. If Ihc circuit is capable ofopcmling
This product is intended for USCby qualified personnel who rccog- al or above 1000 voids, no conductive part of the circuit may be
nirc shock hazards and are familiar with the safety precautions re- exposed.
quired to avoid possihlc injury. Read Lbc operating information
cardully before using the product.

The types of product users are:

Responsible body is the individual or group responsible for the USC
and maintenance of equipmcnt. and for ensuring that operators are
adequately trained.

Operators use tbc product for its intended function. They most hc Do not connect switching cards dircclty 10 unbmilcd power circuils.
trained in electrical safety procedures and proper use of the inntru- They arc intended LO be used with impcdancc limilctl sourcc~.
ment. They must bc protected from electric shock and contacl with NEVER connect switching cards directly to AC mains. When con-
hazardous live circuils. nccting sources to switching cards. install prolectivc dcviccr 1o tiw
it fault currcn, and votragc to the card.
Maintenance personnel perform routine procedures on the product
to keep it operating, for example. setting tic line voltage or rcplac- Bcforc operating an inswument, make sure lbc lint cord is connccl~
ing consumable materials. Maintenance procedures are described in cd to a properly grounded power reccpt;~lc. Inspect the connecting
the manual. The procedures explicitly state if tbc operator may pw cables, test leads, and jumpers for possible wear. cracks. or breaks
form them Otherwise, they should be pcrformed only by service before each use.
p~IS""d
For maximum safety. do no, louch ,bc product, tcs, abler. or any
Service personnel are trained to work on tivc circuits, and perform other instruments white power is appticd to the circuil under test.
saie installations and repairs of products. Only properly trained ser- ALWAYS remove power from the entire test syswm and discharge
vice personnel may perform installation and service procedures. any capecitars before: connecting or disconnccdng cabtcs or jump-
ers, installing or removing switching cards. or making internal
Exercise cxtrome caution when a shock hazard is present. Lethal changes, such as installing or removing jumpers.
voltage may be present on cable connector jacks or test fixtures. The
American National Standards Institute (ANSI) states that a shock Do not touch any object that could provide a currcn~ petit to tbc
hazard exists when voltage levels greater than 30V RMS, 42.4V common side of tbc circuit under wrl or power line (earth) ground.
peak, or 60VDC are present. A good safety practice is to Expect Always make m~~surcments with dry hands while standing on a
that hazardous voltage is present in any unknown circuit beSore dry, insulated surface capahtc of withslanding the voltapc hciny
measuring. measured.
Do not exceed the maximum signal levels of the inslrumcnt~ and ac- Instrumentation and a~~~~sories shall not be connected LOhumans.
ccssories, as delined in the specilications and operating informa-
tion, and as shown on the instrumenl or at tixtorc pan&, or Beiore performing any maintenance, disconnecl Lhc lint cord and
switching card. all test cables.

TII maintain protection from electric shock and fire, rcplaccmcnt
When fuses are used in a product, replace with same type and rating
components in mains circuits, including the power ~ransCormer, lest
lor continued proteclion agains, lirc hazard.
Icads, and input jacks, must be purchased from Keithley lnstru-
mmts. Standard fuses, wilh applicable national safely approvals,
Chassis connecLions must only be used as shield connections lo1
may hc used if the rating and type are the same. Other components
measuring circuils, NOT as safely cart,, ground connections.
that are not salety related may be purchased from other suppliers as
long as they are equivalent to the original component. (Note that se-
If you ax using a test fixture, keep the lid closed while powcr is ap-
lcclcd parts should bc purchased only through Keithley instruments
plied to the device under test. Safe operation requires the use of a
to maintain accuracy and funclionalily of the product.) If you am
lid intcll"ck.
unsure about the applicability of a replacement componen,, call II
Keithley Instruments oftice for informalion.
Ifa @ LL~CWis prcscnt, connect it to safely earl,, ground using the
"
wire recommended in Ihe user documentation.
To clean the instrument, USC a damp cloth or mild, water based
cleaner. Clean the exterior or Lhe insLIumcnt only. Do not apply
The A ! symbol on an instrument indicates Ihat the user should rc-
cleaner directly to the instnun~nl or allow liquids to enter or spill
fcr t" the upcrating instructions located in the manual.
on the inslrument.
Then symbol on an instrument shows Iha, it can source or me&
sure 1000 dolts or more. including the combincd effect of normal
and commrln mode ""Itages. "se standard safety precautions LO
avoid personal contact with thcsc voltages.

The WARNING heading in a manual explains dangers that might
result in personal injury or death. Always read Lhe associated infor-
mation wry carefully before performing the indicated procedure.

The CAUTION heading in a manual explains hands tia~ could
damage the instrument. Such damage may invalidate the warranty.
Specifications
Table of Contents
1 General information
1.1 Introduction.. ........................................................................................................................................................ I I
1.2 Features ................................................................................................................................................................ I I
1.3 Warranty information ........................................................................................................................................... I -I
1.4 Manual addenda ................................................................................................................................................... I I
1.5 Safety symbols and tams .................................................................................................................................... I I
1.6 Specifications ....................................................................................................................................................... I-2
1.7 Unpacking and inspection.. .................................................................................................................................. I-?
1.7.1 Inspection ror damage ................................................................................................................................ I-2
1.7.2 Shipment contents ...................................................................................................................................... I-2
1.X Repacking for shipment ....................................................................................................................................... I-2
1.9 Optional acCeSSorieS.. ........................................................................................................................................... I-2

2 Card Installation
2.1 Introduction .......................................................................................................................................................... 2-l
2.2 Changing card installation access ....................................................................................................................... .2-l
2.3 .....................................................................................................................................
Card ~nstallatlonlremoval.. 2-2

3 Getting Started
3.1 Introduction.. ........................................................................................................................................................ 3. I
3.2 Front panel famdmnzatlon..
..................................................................................................................................... 3-I
3.2.1 LED matrix ................................................................................................................................................ 3-2
3.2.2 Light pen connection.. ................................................................................................................................ 3-3
3.2.3 LED indicators ........................................................................................................................................... 3-3
3.2.4 Switches/connections.. ............................................................................................................................... 3-3
3.3 Rear panel familiarization.. .................................................................................................................................. 3-4
3.4 Card connections.. ................................................................................................................................................ 3-6
3.4.1 Overview - matrix design considerations ................................................................................................ 3-h
3.4.2 Connections - mstruments to rows ......................................................................................................... .3-6
3.4.3 ConnectIons - mstmments to columns .................................................................................................... 3-X
3.4.4 Connections -partial matrix expansion ................................................................................................... 3-X
3.4.5 Multiple application cards .......................................................................................................................... 3-8
,,
3.5 Expandmg matrix SIX.. ...................................................................................................................................... 3.10
3.5.1 Overview ~ multiple matrix expansion.. ............................................................................................... .3 IO
3.5.2 Backplane row expansion ........................................................................................................................ 3- I4
3.5.3 External expansion ................................................................................................................................... 3- 14
3.5.4 Control expansion using master/slave configuration ............................................................................... 3- I.5
3.5.5 System expansion issues. ......................................................................................................................... 3.18
3.5.6 Documenting system configuration ......................................................................................................... 3.18
3.5.7 Analog backplane cable construction. ..................................................................................................... 3.20
35.8 Sample expanded matrices ...................................................................................................................... 3.20
3.6 Bask?watching overview .................................................................................................................................. 3.24
3.6.1 Power-up.. ................................................................................................................................................ 3-24
3.6.2 Selecting make/break and break/make rows ............................................................................................ 3.24
3.6.3 Modifying a relay setup ........................................................................................................................... 3.24
3.6.4 Storing relay setup and applying setup to relays ..................................................................................... 3.24

4 Operation
4.1 Introduction.. ........................................................................................................................................................ 4 -I
4.2 Setup date paths.. ................................................................................................................................................. 4-l
4.3 Power-up procedure.. ........................................................................................................................................... 4-2
4.3. I Line power connections ............................................................................................................................. 4-2
4.3.2 Power switch.. ............................................................................................................................................ 4-2
4.3.3 Power-up self-test and error condltlons.. ..................................................................................................... 4-2
4.3.4 Power-up c"nCigurati"n ............................................................................................................................. 4-3
4.3.5 Master/slave power-up ............................................................................................................................... 4-3
4.4 Display.. ............................................................................................................................................................... 4.4
4.4.1 Error LED .................................................................................................................................................. 4-4
4.4.2 IEEE-4X8 statns indicators ........................................................................................................................ 4-4
4.4.3 Crosspoint display LEDs ........................................................................................................................... 4-S
4.4.4 Light pen .................................................................................................................................................... 4-S
4.5 Crosspoint display ............................................................................................................................................... 4-6
4.5. I Modifying.. ................................................................................................................................................ 4-6
4.52 Copying ...................................................................................................................................................... 4-h
4.6 Operation control ................................................................................................................................................. 4-7
4.6. I Digital I/O ports.. ....................................................................................................................................... 4-7
4.6.2 External trigger.. ........................................................................................................................................ 4-X
4.6.3 Matrix ready "utput ................................................................................................................................... 4-X
4.6.4 Stand-alonc and master/slave .................................... ................................................................................ 4-9
4.6.5 IEEE-488 bus address.. ............................................................................................................................ 4.10
4.6.6 Hardware relay settling times .................................................................................................................. 4.10
4.6.7 Self-test.. .................................................................................................................................................. 4.10
4.6.8 Factory delaults ....................................................................................................................................... 4.10
4.7 Selecting switching parameters ......................................................................................................................... 4.10
4.7.1 Programmed settling times ...................................................................................................................... 4-l I
4.7.2 Make/break and break/make rows ........................................................................................................... 4-l I
4.8 Triggering .......................................................................................................................................................... 4-I I
4.x.1 Sources.. ................................................................................................................................................... 4-12
4.X.2 Overnm conditions .................................................................................................................................. 4.12
4.8.3 External trigger input ............................................................................................................................... 4.14
4.8.4 Matrix ready output ................................................................................................................................. 4.14
4.8.S IEEE-48X bus triggering .......................................................................................................................... 4.15
4.9 Reset .................................................................................................................................................................. 4.15

5 IEEE-488 Programming
5.1 Introduction .......................................................................................................................................................... 5-l
5.2 IEEE-488 quick start.. .......................................................................................................................................... 5-l
5.3 Bus cable connections .......................................................................................................................................... 5.3

ii
5.4 Interface function codes ....................................................................................................................................... 5-S
5.5 Primary address programming.. ........................................................................................................................... 5-S
5.6 QuickBASIC programming ................................................................................................................................. 5-6
5.7 Indicator and c"ntrol aspects "f IEEE-488 "pcration .......................................................................................... S-7
5.7. I Error LED .................................................................................................................................................. s-7
5.7.2 Stetus indicators ......................................................................................................................................... S-X
5.7.3 I,OCAL/DIGITAL I/O key.. ...................................................................................................................... S-9
5.7.4 Concurrent front panel and bus operation .................................................................................................. S-LJ
5.8 Gcncral bus command pmgramming ................................................................................................................... S-5.8. I Ovcrvicw.. .................................................................................................................................................. S-9
5.8.2 REN (remote enable) ................................................................................................................................. 5.`)
5.8.3 IFC (intcrfacc clear) ................................................................................................................................. S-IO
5.8.4 LLO (local lockout) ................................................................................................................................. S-10
5.8.5 GTL, (go t" local) ..................................................................................................................................... 5-10
5.8.6 DCL (dcvicc clear). .................................................................................................................................. s-10
5.x.7 SDC (selective dcvicc clear) .................................................................................................................... 5~IO
5.X.X GET (group execute trigger) ................................................................................................................... .S~IO
5.x.9 SPE, SPD (serial polling) ......................................................................................................................... 5~10
5.9 Device-depcndcnt command (DDC) programming.. ......................................................................................... S-I I
5.9.1 -0vcrvicw .................................................................................................................................................. 5-l I
5.9.2 A . External trigger ................................................................................................................................ 5.15
5.9.3 B - Matrix ready .................................................................................................................................... S- I6
5.9.4 c - Close crosspoint .............................................................................................................................. 5-I 7
5.9.5 D - Digital Output .................................................................................................................................. S-17
5.9.6 E-Edit pointer.. .................................................................................................................................... S-IX
5.9.7 F - Enable/disable triggers.. ................................................................................................................... 5 I8
5.9.8 G - Data l'ormat ...................................................................................................................................... 5 I9
5.9.9 I -Insert blank setup.. ............................................................................................................................ S-24
5.9.10 J -Self-test.. ........................................................................................................................................... 5-24
5.9.11 K . EOI and hold-off.. ........................................................................................................................... S-24
5.9.12 L - Download setups.............................................................................................................................. S-25
5.9.13 M - SRQ and serial poll byte ................................................................................................................. S-26
5.9.14 N ~ Open crosspoint.. ............................................................................................................................. S-28
5.9. IS 0 - Digital output .................................................................................................................................. S-28
59.16 P - Clear crosspoints .............................................................................................................................. S-29
5.9.17 Q - Delete setup ..................................................................................................................................... S-29
5.9.18 R -Restore defaults ............................................................................................................................... S-30
5.9.19 S - Programmed settling time.. .............................................................................................................. S-30
S.9.20 T - Trigger ............................................................................................................................................. S-3 I
5.9.21 u . status.. .............................................................................................................................................. 5-32
5.9.22 V - Make/Break ..................................................................................................................................... S-36
5.9.23 W -Break/Make.. .................................................................................................................................. S-37
5.9.24 X - Exccutc ............................................................................................................................................. 5-38
5.9.25 Y - Terminator.. ..................................................................................................................................... S-38
5.9.26 z - copy setup ....................................................................................................................................... s-39
5.10 Relay command combinations ........................................................................................................................... S-40
5.1 I Timing conslderatmns ........................................................................................................................................ s-41

6 Principles of Operation
6.1 Introduction.. ........................................................................................................................................................ h-l
6.2 Overview .............................................................................................................................................................. 6-l
6.3 Microcomputer ..................................................................................................................................................... 6-2
6.3. I .................................................................................................................................................
Reset c,rcu,t 6-3
6.3.2 Address decoding ....................................................................................................................................... 6-3
6.3.3 Memory ...................................................................................................................................................... 6-3
6.4 Relay control c,rcu,try ......................................................................................................................................... 6-4
6.4.1 Switching card interface ............................................................................................................................ 6-4
6.4.2 Switching card logic .................................................................................................................................. 6-6
6.5 Display crcutry .................................................................................................................................................. 6-8
6.5. I Display data ............................................................................................................................................. 6-l I
h.S.2 Front pilncl keys ....................................................................................................................................... 6-11
65.3 Display interface ........................................................................................................................... ........... 6-l I
6.5.4 Refresh display/read keyboard ................................................................................................................ 6-I I
6.6 Light pen interface.. ........................................................................................................................................... 6-12
6.7 Master/slave arcutry ........................................................................................................................................ 6-13
6.7.1 Serial cOmmu"lcat*"" .............................................................................................................................. h-13
6.7.2 Control signals ......................................................................................................................................... h- I4
6.8 Digital I/O .......................................................................................................................................................... 6 I4
6.9 IEEE-48X bus interface.. .................................................................................................................................... 6.14
6.10 Power supplies.. ................................................................................................................................................. 6.14

7 Maintenance
7.1 Introduction.. ........................................................................................................................................................ 7-l
7.2 ...........................................................................................................................................
Fixed rack mstallatmn. 7-l
7.3 Cover removal ..................................................................................................................................................... 7-4
7.4 Fuse replaccmcnt ................................................................................................................................................. 7-S
7.5 Battery replacement ............................................................................................................................................. 7-h
7.6 Digital I/O power selection (jumper W 101) ........................................................................................................ 7-7
7.7 Disassembly ......................................................................................................................................................... 7-X
7.8 Static sensitive devices ........................................................................................................................................ 7-8
7.9 Switching System troubleshooting .................................................................................................................... 7-10
7.9. I Recommended tat equipment.. .................................................. ............................................................. 7 IO
7.9.2 Power-up selGtest .................................................................................................................................... 7-10
7.9.3 Power supply checks ................................................................................................................................ 7-l I
7.9.4 Mother board checks ................................................................................................................................ 7.11
7.9.5 Display checks.. ....................................................................................................................................... 7- I5
7.9.6 Using an extender card ............................................................................................................................ 7 I5
7.10 Handling and cleaning ....................................................................................................................................... 7 I5

8 Replaceable Parts
8.1 Introduction .......................................................................................................................................................... 8-l
8.2 Parts lists .............................................................................................................................................................. 8-l
8.3 Ordering information ........................................................................................................................................... 8-l
8.4 Factory service ..................................................................................................................................................... 8-l
8.5 Component layouts and schematics ..................................................................................................................... 8-I

A Card Configuration Worksheet

8 I/O Connections
B.I Typical output connection schemes ,.,,..,.......................,.......................,.....................,,,...................................... B-l
8.2 Typical input connection scheme ,,,,,.,..,............................................,.........................,,...................................... B-2

iv
C IEEE-488 Bus Overview
C.I Introduclion.. ....................................................................................................................................................... C-I
c.2 Bus description.. .................................................................................................................................................. C-I
C.3 Bus lines .............................................................................................................................................................. c-3
c.3.1 Data lines.. ................................................................................................................................................. C-3
C.3.2 Bus management lines .............................................................................................................................. C-3
c.3.3 Handshake lines ........................................................................................................................................ (`~3
c.4 Bus commands.. .................................................................................................................................................. C4
c.4. I Unilinc commands .................................................................................................................................... C-J
C.4.2 Universal mulLilinc commands ................................................................................................................. C-5
c.4.3 commands.. ..............................................................................................................
c.4.4 ...................................................................................................................................
c.4.5
C.4.6
c.4.7
C.4.8
C.5 Intcrhcc Cunction codes ...................................................................................................................................... C-R

"
List of Illustrations
2 Card Installation
Figure 2-l Model 708 switching system - changing switch card installation ,.............................................................. 2-2
Figure 2-2 Matrix card installalion T-3
.._................................................................................................................... _

3 Getting Started
Figure 3-l Model 708 front panel switches.. ................................................................................................................ .3-l
Figure 3-2 Setup data transfers ...................................................................................................................................... 3-2
Figure 3-3 Digital 110 status display.. ............................................................................................................................ 3-2
Figure 3-4 Front panel ................................................................................................................................................... 3-4
Figure 3-5 Model 708 rear panel ................................................................................................................................... 3-5
Figure 3-6 Connecting instruments to rows - single switching system ........................................................................ 3.7
Figure 3-7 Connecting instruments to rows - multiple (two) switching systems ......................................................... 3-7
Figure 3-8 Connecting instruments t" columns - multiple (two) switching systems.. .................................................. 3~Y
Figure 3-9 Partial matrix expansion example.. ........................................................................................................... .3 IO
Figure 3.10 Sample backplane expansion .................................................................................................................... .3 -1 I
Figure 3-l I Sample cxtcmal (I" backplane) expansion ................................................................................................. 3-12
Figure 3. I2 Sample of master/slave interconnect cables five Model 708 switching systems.. .................................. 3 I6
Figure 3-I 3 Mastcdslave column locations.. ................................................................................................................. 3 I7
Figure 3-14 Analog backplane expansion connectors ................................................................................................... 3-20
Figure 3-15 Backplane expansion cable - five Model switching systems .................................................................... 3-21
Figure 3.16 External row expansion two stand-alone Model 708's.. ......................................................................... 3-22
Figure 3- 17 Sample backplane expansion ..................................................................................................................... 3-23
Figure 3. I8 Partial matrix expansion example .............................................................................................................. 3-24

4 Operation
Figure 4. I Paths for relay setup data ............................................................................................................................. 4 -I
Figure 4-2 IEEE-488 status indicators.. ......................................................................................................................... 4-4
Figure 4-3 Crosspoint display LEDs .......................................................................................................................... ...4-5
Figure 4-4 Light pen ...................................................................................................................................................... 4-6
..
Figure 4-S Pinouts dtgltel I/O ports ............................................................................................................................ 4-7
Figure 4-6 1nputl0utput conr,gurat1ons .......................................................................................................................... 4.7
Figure 4-7 Rear panel BNC jacks .................................................................................................................................. 4-8
Figure 4-8 Sample cxtemal trigger pulses ..................................................................................................................... 4-8
Figure 4-9 Sample matrix ready pulses ......................................................................................................................... 4-x
Figure 4. IO Master/sIavc connectors ............................................................................................................................ ...4- 9
Figure 4-11 Rear panel IEEE-488 address switches ..................................................................................................... 4-Y
Figure 4- I2 IEEE-488 bus connector and rotary selection switches ............................................................................. 4-10
Figure 4-13 Timing without make/break and break/make rows.. ................................................................................. .4-12
Figure 4. I4 Timing with either makclbrcak or break/make rows ................................................................................. 4-13
Figure 4-15 Timing with both make/break and break/make rows ................................................................................. 4- 14

vii
5 IEEE-488 Programming
Figure 5. I Flowchart ol'cxamplc program .................................................................................................................... 5-2
Figure S-2 IEEE-488 connector.. ................................................................................................................................... 5-3
Figure S-3 IEEE-48X connections ................................................................................................................................. S-3
Figure 5-4 IEEE-488 connector location ........................................................................................................................ 5-4
Figure 5-5 Contacl assignments .................................................................................................................................... 5-4
t'igurc 5-6 IEEE-488 bus connector and rotary sclcction switchcs.. ............................................................................. S-6
Figure 5-7 IEEE-488 indicllrors ..................................................................................................................................... 5-8
Figure s-x Digital I/O status display mode .................................................................................................................... 5-9
Figurc 5-9 External trigger pulse.. ............................................................................................................................... 5 I5
Figure 5. IO Matrix reedy pulse ..................................................................................................................................... S- I6
Figurc 5-11 GO and Cl full output formats.. ................................................................................................................. S-21
Figurc 5-12 G2 and G3 inspect output Cormats............................................................................................................. S-22
Figurc 5. I3 G4 and G5 condensed output formats ....................................................................................................... 5-22
Figure S- I4 G6 and G7 binary output formats .............................................................................................................. S-23
Figure 5. IS SRQ mask and serial poll byte format.. ..................................................................................................... S-26
Figurc S- I6 KEADY and MATRIX READY signal timing ......................................................................................... 5-3 I
Figurc 5-17 UO machine status word ............................................................................................................................. 5-33
Figure 5-18 Ul error status word .................................................................................................................................. 5-33
Figure 5-19 U3 relay step pointer .................................................................................................................................. 5-34
Figure S-20 U4 number ot" slaves .................................................................................................................................. 5-35
Figure S-21 U5 card idcn(lfxatmn
................................................................................................................................... 5-35
Figure 5-22 U6 relay setthng tmx..
................................................................................................................................ 5-3s
Figure 5-23 U7 digital input .......................................................................................................................................... 5-36

6 Principles of Operation
Figure 6. I Model 708 block diagram ............................................................................................................................ 6-I
Figurc 6-2 Digital board block diagram.. ...................................................................................................................... 6-2
Figure 6-3 RAM and battery backup ............................................................................................................................. 6-4
Figure 6-4 Matrix card interface simplified schematic ................................................................................................. 6-S
Figure 6-S Matrix card interlaw timing diagram.. ........................................................................................................ 6-6
Figure 6-6 Typical matrix card logic block diagram ..................................................................................................... 6-7
Figure 6-7 IDDATA timing diagram ............................................................................................................................ 6-7
Figure 6-X Display board block diagram ....................................................................................................................... 6-9
Figure 6-9 Display interface simplified schematic ........................................................................................................ 6-9
..
IFigure 6-10 Light pen interface simph~xd schematic ................................................................................................... 6.12
..
Figure 6. I I Master/slave interface simphfied schematic .............................................................................................. 6- I3
Figure 6. I2 Digital l/O interlace simplified schematic ................................................................................................. 6 I5

7 Maintenance
Figure 7. I ............................................................................................................................................
Rack mstalla~~on 7-2
Figure 7-2 Screw and dress panel removal .................................................................................................................... 7-4
Figure 7-3 Fuse FAA250location.. .................................................................................................................................. 7-5
Figure 7-4 Shield removal ............................................................................................................................................. 7-6
Figure 7-5 W 101 jumper location ................................................................................................................................. 7-7
Figure 7-6 Model 708 exploded view ........................................................................................................................... l-9
Figure 7-7 Troubleshooting programs. ........................................................................................................................ 7-IO
Figure 7-8 Relay control wavcCorms ........................................................................................................................... 7-14
Figure 7-9 Display interface waveforms ..................................................................................................................... 7 I4
8 I/O Connections
Figure B-I Digital output, solenoid control .................................................................................................................. IS- I
Figure B-2 Digital output, r&y control ........................................................................................................................ IS- I
Figure B-3 Digital output, motor control ...................................................................................................................... B-2
Figure B-4 Digital output, logic dcvicc control.. ........................................................................................................... B-2
....
Figure B-5 Digital input, momtonng micro-swtchcs ................................................................................................... B-2

C IEEE-488 Bus Overview
Figure C-l IEEE-488 bus configuration. ....................................................................................................................... C~?
Figure C-2 IEEE-48X handshake sequcncc ................................................................................................................... C3
Figure C-3 Command codes.. ........................................................................................................................................ C-6

ix
List of Tables
3 Getting Started
Table 3-l Digital input display formats.. ...................................................................................................................... 3-3
Table 3-2 Digital output display Ibrmats ...................................................................................................................... 3-3
Table 3-3 IEEE-488 address switches. ......................................................................................................................... 3-5
Table 3-4 Matrix and multiplexer cards ....................................................................................................................... 3-6
Table 3-S Row-column and column-column paths ...................................................................................................... 3-X
Table 3-6 Matrix expansion.. ....................................................................................................................................... J-13
Table 3-7 Model 708 external expansion cables ........................................................................................................ 3 I5
Table 3-X Rcsponsc time comparison ......................................................................................................................... 3 IX
Table 3-9 Model 708 switching system card configuration worksheet ...................................................................... 3 IY

4 Operation
Table 4. I Setup data paths ........................................................................................................................................... J- I
Table 4-2 Power-up, reset, and factory defaults ........................................................................................................... J-3
Table 4-3 Error conditions.. ........................................................................................................................................ ..J~J
Table 4-4 Slave unit controls, indicators, and connections.. ........................................................................................ 4-9
Table 4-5 Make/break and break/make operation.. ................................................................................................... .4 -I I

5 IEEE-488 Programming
Ta