Tektronix DAS-1200 Series Users Guide

DAS-1200 Series

User’s Guide

A GREATER MEASURE OF CONFIDENCE

WARRANTY

Hardware

Keithley Instruments, Inc. warrants that, for a period of one (1) year from the date of shipment (3 years for Models 2000,
2001, 2002, 2010 and 2700), the Keithley Hardware product will be free from defects in materials or workmanship. This
warranty will be honored provided the defect has not been caused by use of the Keithley Hardware not in accordance with
the instructions for the product. This warranty shall be null and void upon: (1) any modification of Keithley Hardware that
is made by other than Keithley and not approved in writing by Keithley or (2) operation of the Keithley Hardware outside
of the environmental specifications therefore.

Upon receiving notification of a defect in the Keithley Hardware during the warranty period, Keithley will, at its option,
either repair or replace such Keithley Hardware. During the first ninety days of the warranty period, Keithley will, at its
option, supply the necessary on site labor to return the product to the condition prior to the notification of a defect. Failure
to notify Keithley of a defect during the warranty shall relieve Keithley of its obligations and liabilities under this
warranty.

Other Hardware

The portion of the product that is not manufactured by Keithley (Other Hardware) shall not be covered by this warranty,
and Keithley shall have no duty of obligation to enforce any manufacturers' warranties on behalf of the customer. On those
other manufacturers’ products that Keithley purchases for resale, Keithley shall have no duty of obligation to enforce any
manufacturers’ warranties on behalf of the customer.

Software

Keithley warrants that for a period of one (1) year from date of shipment, the Keithley produced portion of the software or
firmware (Keithley Software) will conform in all material respects with the published specifications provided such Keithley
Software is used on the product for which it is intended and otherwise in accordance with the instructions therefore.
Keithley does not warrant that operation of the Keithley Software will be uninterrupted or error-free and/or that the Keithley
Software will be adequate for the customer's intended application and/or use. This warranty shall be null and void upon any
modification of the Keithley Software that is made by other than Keithley and not approved in writing by Keithley.

If Keithley receives notification of a Keithley Software nonconformity that is covered by this warranty during the warranty
period, Keithley will review the conditions described in such notice. Such notice must state the published specification(s)
to which the Keithley Software fails to conform and the manner in which the Keithley Software fails to conform to such
published specification(s) with sufficient specificity to permit Keithley to correct such nonconformity. If Keithley deter­mines that the Keithley Software does not conform with the published specifications, Keithley will, at its option, provide
either the programming services necessary to correct such nonconformity or develop a program change to bypass such
nonconformity in the Keithley Software. Failure to notify Keithley of a nonconformity during the warranty shall relieve
Keithley of its obligations and liabilities under this warranty.

Other Software

OEM software that is not produced by Keithley (Other Software) shall not be covered by this warranty, and Keithley shall
have no duty or obligation to enforce any OEM's warranties on behalf of the customer.

Other Items

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

Items not Covered under Warranty

This warranty does not apply to fuses, non-rechargeable batteries, damage from battery leakage, or problems arising from
normal wear or failure to follow instructions.

Limitation of Warranty

This warranty does not apply to defects resulting from product modification made by Purchaser without Keithley's express
written consent, or by misuse of any product or part.

Disclaimer of Warranties

EXCEPT FOR THE EXPRESS WARRANTIES ABOVE KEITHLEY DISCLAIMS ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANT­ABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEITHLEY DISCLAIMS ALL WARRANTIES WITH
RESPECT TO THE OTHER HARDWARE AND OTHER SOFTWARE.

Limitation of Liability

KEITHLEY INSTRUMENTS SHALL IN NO EVENT, REGARDLESS OF CAUSE, ASSUME RESPONSIBILITY FOR
OR BE LIABLE FOR: (1) ECONOMICAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, PUNITIVE OR
EXEMPLARY DAMAGES, WHETHER CLAIMED UNDER CONTRACT, TORT OR ANY OTHER LEGAL THEORY,
(2) LOSS OF OR DAMAGE TO THE CUSTOMER'S DATA OR PROGRAMMING, OR (3) PENALTIES OR PENALTY
CLAUSES OF ANY DESCRIPTION OR INDEMNIFICATION OF THE CUSTOMER OR OTHERS FOR COSTS, DAM­AGES, OR EXPENSES RELATED TO THE GOODS OR SERVICES PROVIDED UNDER THIS WARRANTY.

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]
JAPAN: New Pier Takeshiba North Tower 13F • 11-1, Kaigan 1-chome • Minato-ku, Tokyo 105-0022 • 81-3-5733-7555 • Fax: [phone]
KOREA: 2FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-888 • 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

4/02

DAS-1200 Series

User’s Guide

Revision C - November 1999

Part Number: 80930

S

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

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety
precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information
carefully before using the product. Refer to the manual for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product may be impaired.
The types of product users are:

Responsible body

the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately
trained.

Operators

of the instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel

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

Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only

properly trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation

Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most mea­surement, control, and data I/O signals are Installation Category I and must not be directly connected to mains voltage
or to voltage sources with high transient over-voltages. Installation Category II connections require protection for high
transient over-voltages often associated with local AC mains connections. Assume all measurement, control, and data
I/O connections are for connection to Category I sources unless otherwise marked or described in the Manual.

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.

age is present in any unknown circuit before measuring.

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

may be exposed.

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

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

is the individual or group responsible for the use and maintenance of equipment, for ensuring that

use the product for its intended function. They must be trained in electrical safety procedures and proper use

perform routine procedures on the product to keep it operating properly, for example, setting

afety Precautions

A good safety practice is to expect that hazardous volt-

no conductive part of the circuit

5/02

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main
input power disconnect device must be provided, in close proximity to the equipment and within easy reach of the
operator.

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.

The instrument and accessories must be used in accordance with its specifications and operating instructions or the
safety of the equipment may be impaired.

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

When fuses are used in a product, replace with same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground con-

nections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation re-

quires the use of a lid interlock.

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

!

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

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

The

WARNING

associated information very carefully before performing the indicated procedure.
The

CAUTION

the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits, including the power

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

To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do
not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist
of a circuit board with no case or chassis (e.g., data acquisition board for installation into a computer) should never
require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected,
the board should be returned to the factory for proper cleaning/servicing.

heading in a manual explains dangers that might result in personal injury or death. Always read the

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

The information contained in this manual is believed to be accurate and reliable. Ho we v er, the
manufacturer assumes no responsibility for its use; nor for any infringements of patents or
other rights of third parties that may result from its use. No license is granted by implication or
otherwise under any patent rights of the manufacturer.

THE MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES RELATED TO THE USE OF THIS PRODUCT. THIS
PRODUCT IS NOT DESIGNED WITH COMPONENTS OF A LEVEL OF RELIABILITY
THAT IS SUITED FOR USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.

DriverLINX, SSTNET, and LabOBJX are registered trademarks and DriverLINX/VB is a
trademark of Scientific Software Tools, Inc.

Microsoft and Windows are registered trademarks and Visual C++ and Visual Basic are trade­marks of Microsoft Corporation.

Borland is a registered trademark and Borland C++, Delphi, and Turbo Pascal are trademarks
of Borland International, Inc.

IBM is a registered trademark of International Business Machines Corporation.
Acrobat is a registered trademark of Adobe Systems Incorporated.
All other brand and product names are trademarks or registered trademarks of their respective

companies.

Copyright © Keithley Instruments, Inc., 1999, 1994.
All rights reserved. Reproduction or adaptation of any part of this documentation beyond that

permitted by Section 117 of the 1979 United States Copyright Act without permission of the
Copyright owner is unlawful.

Table of Contents

Preface

Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii

Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

Overview

1

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

Supporting Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

Functional Description

2

Analog Input Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Differential/Single-Ended Selection . . . . . . . . . . . . . . . . . . . .2-3

Channel Selection in Expanded Configurations . . . . . . . . . . .2-3

Gain Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Conversion Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Clock Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8

Data Transfer Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9

Digital I/O Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

Counter/Timer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11

Wait State Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Setup and Installation

3

Inspecting Your Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Setting Switch-Configurable Options . . . . . . . . . . . . . . . . . . . . .3-2

Setting the Gain Selection Switch. . . . . . . . . . . . . . . . . . . . . .3-3

Setting the Chan 8/16 Switch . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Setting an Alternate Base Address . . . . . . . . . . . . . . . . . . . . .3-5

Setting the Clock Select Switch . . . . . . . . . . . . . . . . . . . . . . .3-6

Setting the Wait State Enable Switch . . . . . . . . . . . . . . . . . . .3-6

Setting the DMA Channel Select Switch . . . . . . . . . . . . . . . .3-6

iii

Installing and Configuring DriverLINX for

DAS-1200 Series Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Installing the DAS-1200 Series Standard

Software Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Before Installing DriverLINX . . . . . . . . . . . . . . . . . . . . . .3-7

Selecting the DriverLINX components to Install. . . . . . . .3-8

Installing DriverLINX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Installing the Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

Configuring the DAS-1200 Board with DriverLINX. . . . . . . . .3-11

Cabling and Wiring

4

Attaching Screw Terminal Connectors and Accessories . . . . . . .4-2

Attaching an STC-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Attaching an STP-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Attaching an STA-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Attaching an STA-U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

Attaching Expansion Accessories . . . . . . . . . . . . . . . . . . . . . . . .4-9

Attaching an EXP-16 or EXP-16/A Expansion Accessory. .4-10

Attaching an EXP-GP Expansion Accessory . . . . . . . . . . . .4-11

Attaching Multiple Expansion Accessories . . . . . . . . . . . . .4-12

Attaching an ISO-4 Accessory. . . . . . . . . . . . . . . . . . . . . . . . . .4-14

Attaching SSH Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15

Attaching an SSH-4/A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

Attaching an SSH-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

Attaching an MB Series Backplane . . . . . . . . . . . . . . . . . . . . . .4-19

Attaching an MB01 Backplane. . . . . . . . . . . . . . . . . . . . . . .4-20

Attaching an MB02 Backplane. . . . . . . . . . . . . . . . . . . . . . .4-21

Connecting Analog Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23

Precautions for Using the DAS-1201 Board at High Gains .4-23

Additional Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24

Connecting a Signal to a Single-Ended Analog Input. . . . . .4-25

Connecting a Signal to a Differential Analog Input . . . . . . .4-26

Common Connection Schemes for Differential Inputs . .4-26

Avoiding Ground Loops with Differential Inputs . . . . . .4-27

DriverLINX Analog I/O Panel

5

Test Panel Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

iv

6

Calibration

Equipment Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Potentiometers and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Calibration Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2

Troubleshooting

7

Problem Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1

Identifying Symptoms and Possible Causes . . . . . . . . . . . . . .7-1

Using the DriverLINX Event Viewer . . . . . . . . . . . . . . . . . . .7-1

Device initialization error messages . . . . . . . . . . . . . . . . . . . .7-2

Testing the Board and Host Computer . . . . . . . . . . . . . . . . . .7-4

Testing the Accessory Slot and I/O Connections . . . . . . . . . .7-5

Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6

Specifications

A

Connector Pin Assignments

B

Main I/O Connector (J1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

PIO Cable Connector (J4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Register-Level Address Map

C

Register Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

ADC Registers (Base Address +0h and +1h). . . . . . . . . . . . . . . C-3

MUX Scan Register (Base Address +2h). . . . . . . . . . . . . . . . . . C-4

Unidirectional Digital Input and Output Registers

(Base Address +3h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5

Status Register A (Base Address +8h) . . . . . . . . . . . . . . . . . . . . C-6

Control Register (Base Address +9h). . . . . . . . . . . . . . . . . . . . . C-8

Counter Enable/Burst Length Register (Base Address +Ah). . C-10

Burst Rate Register (Base Addresses +Bh) . . . . . . . . . . . . . . . C-12

82C54 Programmable Interval Counter/Timer

(Base Addresses +Ch, +Dh, +Eh, +Fh) . . . . . . . . . . . . . . . . . . C-14

Generating Square Waves of Programmed Frequency . . . . C-16

Measuring Frequency and Period . . . . . . . . . . . . . . . . . . . . C-17

Using Counter 0 for Generating Programmable

Time Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-18

v

82C54 Counter/Timer Control Register

(Base Address +Fh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-19

Readback Command Byte

(Returned when SC1 & SC0 are 1) . . . . . . . . . . . . . . . . C-22

Status Byte Format (Returned if STA =0) . . . . . . . . . . . C-23

Bidirectional Digital Ports A, B, CL, and CH 8255A-5
Programmable Peripheral Interface

(Base Address +400h to +403h). . . . . . . . . . . . . . . . . . . . . . . . C-24

Control Register (Base Address +403h) . . . . . . . . . . . . . . . C-25

Conversion Disable Register (Base Address +404h) . . . . . . . . C-28

Burst Mode Enable Register (Base Address +405h) . . . . . . . . C-29

1600 Mode Enable Register (Base Address +406h) . . . . . . . . C-29

Status Register B (Base Address +407h). . . . . . . . . . . . . . . . . C-29

Index

List of Figures

Figure 2-1 Functional Block Diagram. . . . . . . . . . . . . . . . . . .2-2

Figure 2-2 Expanding the Analog Inputs of DAS-1200

Series Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Figure 2-3 Timing Relationships of Conversion Modes . . . . .2-7

Figure 3-1 Default Switch Configuration for DAS-1200

Series Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Figure 3-2 Gain Selection Switch as Viewed Through

Mounting Flange . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Figure 3-3 Base Address, Clock Select, and Wait State

Enable Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

Figure 4-1 Attaching an STC-37 Screw Terminal

Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

Figure 4-2 Pin Assignments of the Main I/O

Connector (J1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Figure 4-3 Attaching an STP-37 . . . . . . . . . . . . . . . . . . . . . . .4-5

Figure 4-4 Cabling and Connections for Attaching

an STA-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Figure 4-5 STA-16 Terminal Names. . . . . . . . . . . . . . . . . . . .4-7

Figure 4-6 Cabling and Connections for Attaching

an STA-U. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Figure 4-7 STA-U Terminal Names . . . . . . . . . . . . . . . . . . . .4-8

Figure 4-8 Pin Assignments of PIO Cable Connector (J4) . . .4-9

vi

Figure 4-9 Attaching an EXP-16 or EXP-16/A Expansion

Accessory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

Figure 4-10 Attaching an EXP-GP Expansion Accessory . . .4-12

Figure 4-11 Attaching Multiple Expansion Accessories. . . . .4-13

Figure 4-12 Attaching Multiple Expansion Accessories

with an STA-16 or STA-U. . . . . . . . . . . . . . . . . .4-14

Figure 4-13 Attaching an ISO-4 Accessory . . . . . . . . . . . . . .4-15

Figure 4-14 A Typical SSH-8 Application . . . . . . . . . . . . . . .4-15

Figure 4-15 Attaching an SSH-4/A Accessory . . . . . . . . . . . .4-16

Figure 4-16 Attaching SSH-8 Accessories . . . . . . . . . . . . . . .4-17

Figure 4-17 Attaching SSH-8 and STA-16 Accessories. . . . .4-18

Figure 4-18 Typical Measurement and Control Application. .4-19

Figure 4-19 Attaching an MB01 Backplane . . . . . . . . . . . . . .4-20

Figure 4-20 Attaching Multiple MB02 Backplanes . . . . . . . .4-21

Figure 4-21 MB02 I/O Connections . . . . . . . . . . . . . . . . . . . .4-22

Figure 4-22 Connections for Wiring a Signal Source to a

DAS-1200 Series Board Configured for

Single-Ended Inputs. . . . . . . . . . . . . . . . . . . . . . .4-25

Figure 4-23 Three Methods for Wiring Differential Inputs . .4-26
Figure 4-24 A Differential Input Configuration that Avoids

a Ground Loop. . . . . . . . . . . . . . . . . . . . . . . . . . .4-27

Figure 4-25 Differential Input Configuration with a

Ground Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-28

Figure B-1 Pin Assignments of Main I/O Connector (J1)

on DAS-1200 Series. . . . . . . . . . . . . . . . . . . . . . . B-1

Figure B-2 Pin Assignments of PIO Cable Connector (J4) . . B-2

List of Tables

Table 1 Finding Information. . . . . . . . . . . . . . . . . . . . . . . . xii

Table 2 Related Documents . . . . . . . . . . . . . . . . . . . . . . . .xiii

Table 2-1 DAS-1201 Gains, Ranges, and

Throughput Rates. . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Table 2-2 DAS-1202 Gains, Ranges, and

Throughput Rates. . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Table 3-1 Gain Selection Switch Positions . . . . . . . . . . . . . .3-4

Table 3-2 I/O Address Map (000H to 3FFH). . . . . . . . . . . .3-11

Table 4-1 EXP-16 and EXP-16/A Terminal Names . . . . . .4-10

Table 4-2 EXP-GP Terminal Names . . . . . . . . . . . . . . . . . .4-11

Table 4-3 MB Series Backplanes. . . . . . . . . . . . . . . . . . . . .4-20

Table 7-1 Troubleshooting Information. . . . . . . . . . . . . . . . .7-3

Table A-1 Analog Input Specifications. . . . . . . . . . . . . . . . . A-1

vii

Table A-2 Digital I/O Specifications (8-bits on Main I/O

Connector) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table A-3 Digital I/O Specifications (24-bits on

PIO Cable Connector) . . . . . . . . . . . . . . . . . . . . . A-4

Table A-4 Programmable Counter/Timer Specifications . . . A-4

Table A-5 Power Supply Requirements . . . . . . . . . . . . . . . . A-5

Table A-6 Environmental Specifications . . . . . . . . . . . . . . . A-5

Table C-1 Register-Level Address Map . . . . . . . . . . . . . . . . C-2

Table C-2 Logic State of Status Register A: MUX Bit 5 . . . C-7
Table C-3 Control Register: Pacer Clock Source Selection . C-8
Table C-4 Control Register:

Interrupt Level Selection Bits 4, 5, & 6. . . . . . . . C-9

Table C-5 Counter/Timer Address Map . . . . . . . . . . . . . . . C-14

Table C-6 82C54 Counter/Timer Control Register:

Selecting Functionality . . . . . . . . . . . . . . . . . . . C-20

Table C-7 82C54 Counter/Timer Control Register:

Bits 4 and 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-20

Table C-8 82C54 Counter/Timer Control Register:

Readback Command . . . . . . . . . . . . . . . . . . . . . C-22

Table C-9 Counter Status Byte Selection: Bits 0, 1, & 2 . . C-23

Table C-10 PPI Register Address Map . . . . . . . . . . . . . . . . . C-24

Table C-11 Mode Selection for Ports A and CH . . . . . . . . . C-26

Table C-12 PIO Control Word . . . . . . . . . . . . . . . . . . . . . . . C-27

viii

Preface

This guide is for persons needing to understand the installation, interface
requirements, functions, and operation of the DAS-1201 and DAS-1202
boards. This manual uses the term DAS-1200 Series boards to refer to
both boards.

To follow the information and instructions contained in this manual, you
must be familiar with the operation of an IBM PC or compatible in the
Windows 95/98 or Windows NT environment. You must also be familiar
with data acquisition principles and their applications.

ix

Manual Organization

Table 1 lists the topics that this guide focuses on and indicates where you
can find information about a topic.

Table 1. Finding Information

To learn more about: See:

The capabilities of DAS-1200 Series boards Chapter 1
What software is available for the boards Chapter 1
What accessories are available for the boards Chapter 1
Functionality of DAS-1200 Series boards Chapter 2
Setting up DAS-1200 Series board switch-configurable options Chapter 3
Installing DriverLINX software Chapter 3
Installing the DAS-1200 Series boards Chapter 3
Configuring the DAS-1200 Series board using DriverLINX Chapter 3
Attaching accessories Chapter 4
Precautions to observe when connecting signals Chapter 4
Using the DriverLINX Control Panel for test and data acquisition Chapter 5
Calibrating the board Chapter 6
Troubleshooting and obtaining technical support Chapter 7
DAS-1200 Series specifications Appendix A
I/O connector pin assignments Appendix B
The register-level I/O map Appendix C

x

Related Documents

You can find more information on DAS-1200 Series software and
accessories in the related documents listed in Table 2.

DriverLINX Installation and Configuration Guide
DriverLINX Appendix F: Configuration and Implementation. Notes for

Keithley DAS-16/1600

boards).

DriverLINX Analog I/O Programming Guide
DriverLINX Digital I/O Programming Guide
DriverLINX Counter/Timer Programming Guide
EXP-16 & EXP-16A Expansion Multiplexer/Amplifier System User’s

Guide

Table 2. Related Documents

Document

(this manaul also includes DAS-1200 Series

EXP-GP Signal Conditioning Multiplexer User’s Guide
MB Series User’s Guide
SSH-4/A Simultaneous Sample & Hold Module User’s Guide
SSH-8 User’s Guide
ISO-4 User’s Guide

xi

1

Overview

The DAS-1200 Series is a family of high-performance analog and digital
I/O boards with DriverLINX software that requires:

●

an IBM PC or compatible AT (386 or Pentium CPU) with minimum
of 2 MB of memory

at least one floppy disk drive and one fixed disk drive

●

Microsoft Windows 95/98, or Windows NT 4.0 or higher

●

●

a compiler supporting Microsoft Windows development

●

a mouse is highly recommended.

This section describes the features of the DAS-1200 Series boards, the
software that supports them, and available accessories.

Features

The DAS-1200 Series features are as follows:

●

Boards are switch-configurable for 16 single-ended or eight
differential analog input channels.

Analog inputs are bipolar with a maximum range of ±5 V.

●

The gain applied to analog input channels is switch-configurable. The

●

DAS-1201 has switch-configurable gains of 1, 10, 100, and 500. The
DAS-1202 has switch-configurable gains of 1, 2, 4, and 8.

1-1

Analog inputs are sampled with 12-bit resolution at a maximum of

●

50 ksamples/s for the DAS-1201 and 100 ksamples/s for the
DAS-1202.

●

The base I/O address and Direct Memory Address (DMA) channel
are switch-configurable; interrupt levels are software-configurable.

●

Burst mode sampling capability emulates simultaneous
sample-and-hold (SSH) operation.

Analog-to-digital (A/D) conversions can be started through an y of the

●

following methods:

– software command

– onboard pacer clock

– external pacer clock

●

External Simultaneous Sample-and-Hold (SSH) hardware is
supported.

Data transfers can be performed by any of the following methods:

●

– program control

– interrupt service routines

– DMA transfer

The boards perform 8-bit data transfers on the ISA bus.

●

●

A 3-channel programmable counter/timer (82C54) provides timing
for analog input operations or generation of output pulses at any rate
from 1 pulse/hour to 100 kHz. The 82C54 counter/timer can also be
used to measure frequency, period, and pulse width.

1-2 Overview

The DAS-1200 Series boards provide a total of 32 bits of digital I/O.

●

Four unidirectional digital inputs and four unidirectional digital
outputs are provided on the main I/O connector; 24 bits of
bidirectional digital I/O are provided on the PIO cable connector (J4).
These 24 bits are configured as two 8-bit ports and two 4-bit ports
that can be set independently for input or output.

The 24-bits of bidirectional digital I/O are compatible with the
Keithley PIO-12 board. You can use these ports to gate the
counter/timer, control multiplexers, and read the status of external
devices.

●

The boards are backward compatible with the DAS-16 and DAS-16F
boards. Programs for the DAS-16 and DAS-16F run on the
DAS-1200 Series without modification.

For more information on these features, refer to the functional description
in Section 2.

Supporting Software

This section describes how to install the DAS-1200 Series standard
software package and supporting software packages. The contents of
these software packages are described as follows:

DAS-1200 Series standard software package

●

— Shipped with
DAS-1200 Series boards. Includes DriverLINX for Microsoft
Windows 95/98 or Windows NT and function libraries for writing
application programs under W indows in a high-le vel language such as
Microsoft Visual C++, Microsoft Visual Basic, Borland Delphi
support files, LabVIEW, utility programs, and language-specific
example programs.

●

DriverLINX —

the high-performance real-time data-acquisition

device drivers for Windows application development includes:

DriverLINX API DLLs

●

and drivers supporting the DAS-1200

Series hardware.

1-3

Analog I/O Panel —

●

A DriverLINX program that verifies the
installation and configuration of DriverLINX to your DAS-1200
Series board and demonstrates several virtual bench-top
instruments.

●

Learn DriverLINX —

an interactive learning and demonstration
program for DriverLINX that includes a Digital Storage
Oscilloscope.

Source Code —

●

●

DriverLINX Application Programming Interface files —

for the sample programs.

DAS-1200 Series.

●

DriverLINX On-line Help System —

provides immediate help as

you operate DriverLINX.

●

LabVIEW —

●

Supplemental Documentation —

support for DriverLINX.

on DriverLINX installation and
configuration, analog and digital I/O programming, counter/timer
programming; technical reference, and information specific to the
DAS-1200 Series hardware.

●

DAS-1200 Series utilities —

The following utilities are provided as

part of the DAS-1200 Series standard software package:

●

Analog I/O

Utility —

DriverLINX utility used for data acquisition

and testing board operation.

●

Test Utility —

DriverLINX utility used for testing board

operation.

for the

●

Calibration Utility —

DriverLINX utility used for calibration.

1-4 Overview

Accessories

The following accessories are av ailable for use with the DAS-1200 Series
boards.

●

STA-16 — Screw terminal adapter accessory. You can use this

accessory to connect signals from the main I/O connector (J1) to
screw terminals.

●

STA-U —

Universal screw terminal accessory. You can use this
accessory to connect interface signals from the PIO cable connector
(J4) to screw terminals.

STC-37 —

●

Direct DAS-1200 Series board to screw terminal

interface.

●

STP-37 —

●

ISO-4 —
SSH-4/A —

●

●

SSH-8 — 8-channel simultaneous sample-and-hold accessory.

●

MB Series modules and backplanes —

Screw terminal panel with a 37-pin D-type connector.

4-channel isolated expansion multiplexer.

4-channel simultaneous sample-and-hold accessory.

Plug-in, isolated,

signal-conditioning modules and the backplanes that hold them.

EXP-16 and EXP-16/A —

●

16-channel expansion multiplexer and
signal conditioning accessory; requires the S-1600 cable and the
PG-408A option.

●

EXP-GP —

8-channel signal conditioning accessory with

Wheatstone bridge and RTD interface; requires the S-1600 cable.

1-5

2

Functional Description

This section describes the following features of D AS-1200 Series boards:

●

Analog input features

●

Digital I/O features

●

82C54 counter/timer features

Wait state selection

●

●

Power

Together with the DAS-1200 Series block diagram shown in Figure 2-1,
these descriptions are offered to familiarize you with the operating
options and to enable you to make the best use of your board.

2-1

Ch 0/0

Ch 7/15

8 or 16

Analog

Input

Channels

Diff./S.E.
Selection

Instrumentation

Gain Select

Switch

Data

Buffers

Amplifier

Mux Increment

& Control Logic

Internal Data Bus

Control
Register

Address Decode

& Select

Sampling

12-bit ADC

ADC & Mux
Data Register

Status

Register

Clock
Select

Logic
Timer

Enable

Register

Control Logic

DMA

Level Select

DMA

Port A
Port B

Port Cl
Port Ch

Output

Register

Register

100 kHz

Interrupt Control

Logic

4-bit

4-bit

Input

16-bit
Counter

16-bit
Counter

16-bit
Counter

1 MHz

8 Bits
8 Bits
4 Bits

4 Bits

OP3
OP2

OP1
OP0

IP3
IP2/CNTR 0 Gate
IP1/XTRIG
IP0/TRIG

XPCLK0/

CNTR 0

Out

Programmable
Interval Timer

CNTR 2

Out

CNTR 0
CLK In

10 MHz

ISA PC AT, PC/XT BUS

.

Figure 2-1. Functional Block Diagram

2-2 Functional Description

Analog Input Features

The analog input section of a DAS-1200 Series board multiplexes all the
active input channels (up to 16 single-ended or eight dif ferential) do wn to
a single, 12-bit sampling analog-to-digital converter (ADC).

DAS-1200 Series boards operate in bipolar input mode only. Bipolar
signals can swing up and down between negative and positive peak
values. The DAS-1200 Series boards have a maximum range of
+5 V and use left-justified, offset binary to represent signals.

Other features of this section include input configurations, gain selection,
conversion modes, triggers, clock sources, and data transfer modes. These
features are described in the following sections.

Differential/Single-Ended Selection

Using configuration switches, you can select either eight differential or 16
single-ended inputs. Differential inputs measure the difference between
two signals. Single-ended inputs are referred to a common ground.

-

5 V to

Generally , you want to use differential inputs for low-level signals whose
noise component is a significant part of the signal or for signals that have
non-ground common mode. You want to use single-ended inputs for
high-level signals whose noise component is not significant.

The specific level at which input configurations work best is dependent
upon the application. However, you generally use differential inputs for
voltage ranges of 100 mV and less.

Channel Selection in Expanded Configurations

As previously mentioned, the D AS-1200 Series supports 16 single-ended
or eight differential analog input channels. If you require additional
analog input channels or signal conditioning for transducer inputs, you
can use any combination of up to eight 16-channel EXP-16 or EXP-16/A
expansion accessories, and/or eight 8-channel EXP-GP expansion
accessories to increase the number of available channels to 128.

2-3

When you daisy-chain expansion accessories from the analog inputs, it is
recommended that the first expansion accessory multiplex onboard use
channel 0, the next expansion accessory multiplex channel 1, and so on.
Selection of an onboard channel is made via jumper settings on the
expansion accessory.

You can access any unused onboard channels by including an STA-16
screw terminal accessory in the daisy-chain configuration. Figure 2-2
illustrates how expansion boards and accessories interface with the analog
channels of DAS-1200 Series boards.

DAS-1200
Series Boards

ch 0
ch 1

ch 2

Transducer

16 multiplexed
input channels

8 multiplexed
input channels

.

.

ch 7

digital output

port

Expansion Channel
Select Lines (OP0 to 3)

Figure 2-2. Expanding the Analog Inputs of DAS-1200 Series Boards

You can also use up to four MB02 backplanes to increase the number of
available channels to 64 isolated or 12 non-isolated. For more information
about connecting channel expansion boards, refer to Section 4.

EXP-16 or EXP-GPSTA-16
EXP-16/A

2-4 Functional Description

Gain Selection

Notes:

You must specify a single-ended input configuration for all

onboard channels associated with channels on MB02 backplanes.

If you are using EXP-16, EXP-16/A, or EXP-GP expansion accessories
or MB Series backplanes, the digital output lines of the DAS-1200 Series
board select a particular channel on the expansion accessory or backplane
to read.

The switch-configurable gain that you select is applied to an incoming
signal as a multiplication factor; gain allows you to amplify a signal to a
range that the ADC can accurately measure.

For example, if the ADC handles signals in the ±5 V range and you want
to measure a signal in the range of ±0.5 V, you would use a gain of 10 to
amplify the signal to the ±5 V range. Similarly, if you wanted to measure
a signal that was already in the ±5 V range, you would select a gain of 1.

The available gains, their corresponding input ranges, and throughput
rates are listed in Table 2-1 for the DAS-1201 and Table 2-2 for the
DAS-1202.

Table 2-1. DAS-1201 Gains, Ranges, and Throughput Rates

Maximum
Throughput

Gain Input Range

1 ± 5.0 V 50 ksamples/s

10 ±0.5 V 50 ksamples/s
100 ±50 mV 50 ksamples/s
500 ±10 mV 10 ksamples/s

Rate

2-5

Table 2-2. DAS-1202 Gains, Ranges, and Throughput Rates

Conversion Modes

DAS-1200 Series boards support the following conversion modes:

●

Paced mode

is the mode best-suited for continuous scanning of multiple channels
at a constant rate. In paced mode, the conversion rate equals the pacer
clock rate. The sample rate, which is the rate at which a single
channel is sampled, is the pacer clock rate divided by the number of
channels being sampled.

Maximum
Throughput

Gain Input Range

1 ± 5.0 V 100 ksamples/s
2 ±2.5 V 100 ksamples/s
4 ±1.25 V 100 ksamples/s
8 ±0.625 V 100 ksamples/s

Rate

— Paced mode is the default data conversion mode and

Burst mode

●

— In burst mode, each pulse from the pacer clock begins
a scan of one to sixteen channels. The conversion rate during a burst
mode scan is equal to the rate of the burst mode conversion clock.
The sample rate, which is the rate at which a single channel is
sampled, is equal to the pacer clock rate.

DAS-1200 Series software allows you to program the pacer clock to
adjust the interval between burst mode scans. This software also
allows you to adjust the burst mode conversion rate. The burst mode
conversion clock frequency is programmable for a range of 3.94 kHz
to 100 kHz.

Burst mode can also be used for pseudo-simultaneous
sample-and-hold in conjunction with DMA or interrupt operations.

2-6 Functional Description

The sample rate (pacer clock rate) should be set for no more than the
burst mode conversion clock rate divided by the number of channels
in the burst. The maximum burst mode conversion clock rate is
gain-sensitive, as shown in Table 2-1 and Table 2-2.

Figure 2-3 shows the timing relationships of the paced and burst modes
for analog input channel 4 to channel 7.

Pacer Clock
Paced Mode Conversions
Burst Mode Conversions

Burst Mode Conversion Clock

Figure 2-3. Timing Relationships of Conversion Modes

ch4
ch4

ch5 ch6 ch7 ch4 ch5 ch6 ch7

ch5

Clock Sources

The following clock sources are available for conversions on DAS-1200
Series boards:

●

Software

— DAS-1200 Series boards allow you to acquire single or

multiple samples under program control.

●

Hardware (internal clock source)

— The internal pacer clock is
derived from the onboard 82C54 counter/timer and a
switch-configurable, crystal-controlled 1 MHz or 10 MHz timebase.
The pacer clock uses two cascaded counters of the 82C54. The
maximum allowable rate is 100 ksamples/s (for the DAS-1202) or
50 ksamples/s (for the DAS-1201).

2-7

The minimum conversions per hour is determined as follows:

10MHz

------------------ 2 .328 103–¥ 8.38==

32

2

1MHz

--------------- 2 .328 104–¥ 0.838==

32

2

When not used to pace the analog input, the internal clock source can
pace other events, such as digital I/O, through the use of interrupts.

●

Hardware (external clock source)

— The external pacer clock
source must be an externally applied, TTL-compatible, rising-edge
signal attached to the IP0/TRIG 0/XPCLK pin (25) of the main I/O
connector (J1).

An external clock source is useful if you want to pace at rates not
available with the 82C54 counter/timer, if you want to pace at uneven
intervals, or if you want to pace on the basis of an external event. An
external clock also allows you to synchronize multiple boards with a
common timing source.

Notes:

The ADC on the DAS-1202 acquires samples at a maximum of
100 ksamples/s (one sample every 10.0 µs); the ADC on the DAS-1201
acquires samples at a maximum of 50 ksamples/s (one sample every

20.0 µs). If you are using an external clock, make sure that it does not
initiate conversions at a faster rate than the ADC can handle.

If you are acquiring samples from multiple channels, the maximum
sampling rate for each channel is equal to 100 ksamples/s divided by the
number of channels (for the DAS-1202) or 50 ksamples/s divided by the
number of channels (for the DAS-1201).

Triggers

A trigger starts an analog input operation. The polarity of external triggers
in the DAS-1200 Series boards is software-configurable. You can use one
of the following trigger sources to start an analog input operation:

●

Internal

begin immediately.

2-8 Functional Description

— When you enable the analog input operation, con versions

External Analog

●

— While an analog trigger is not a hardware feature
of the DAS-1200 Series boards, you can program an analog trigger
using one of the analog input channels as the trigger channel.
DriverLINX provides functions for an analog trigger; refer to the

DriverLINX Appendix F: Configuration and Implementation. Notes
for Keithley DAS-16/1600

(this manual also includes DAS-1200

Series boards).

External Digital

●

— While a digital trigger is not a hardware feature
of the DAS-1200 Series boards, you can program a digital trigger
using one of the digital input channels as the trigger channel.
DriverLINX provides functions for an analog trigger; refer to the

DriverLINX Appendix F: Configuration and Implementation. Notes
for Keithley DAS-16/1600

(this manual also includes DAS-1200

Series boards).

Connect the digital trigger to the digital input IP1/XTRIG pin (6) of
the main I/O connector (J1). Trigger types are as follows:

–

Positive-edge trigger

- Conversions begin on the rising edge of

the trigger signal.

–

Negative-edge trigger

- Conversions begin on the falling edge of

the trigger signal.

–

Positive-level trigger

- Conversions begin when the signal is

above a positive level.

–

Negative-level trigger

- Conversions begin when the signal is

below a negative level.

Data T ransfer Modes

You can transfer data from the DAS-1200 Series boards to the computer
using the following data transfer modes:

●

Single mode

acquires a single sample from a single channel; you cannot perform
any other operation until the single-mode operation is complete.

— In single-mode operation, a data acquisition board

2-9