Tektronix DAS-1600/1400 Series Users Guide

DAS-1600/1400 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-1600/1400 Series

User’s Guide

Revision C - December 1998

Part Number: 80940

The information contained in this manual is believed to be accurate and reliable. However, 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 DAMA GES RELATED TO THE USE OF THIS PR ODUCT. THIS PRODUCT IS
NOT DESIGNED WITH COMPONENTS OF A LEVEL OF RELIABILITY THAT IS SUITED FOR
USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.

All brand and product names are trademarks or registered trademarks of their respective companies.

Copyright Keithley Instruments, Inc., 1998, 1996, 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.

Keithley Instruments, Inc.

28775 Aurora Road, Cleveland, OH 44139

FAX: [phone]

Telephone: [phone]

●

http://www.keithley.com

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

Table of Contents

Preface

1

Overview

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

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

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

Functional Description

2

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

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

Unipolar/Bipolar 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

Analog Output Features (DAS-1600 Series Only) . . . . . . . . . .2-10

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

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

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

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

3

Setup and Installation

Unwrapping and Inspecting Your Board . . . . . . . . . . . . . . . . . . .3-1

Installing and Configuring DriverLINX for DAS-1600/1400

Series Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Installing the DAS-1600/1400 Series Standard

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

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

Selecting the DriverLINX components to Install . . . . . . .3-4

Installing DriverLINX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Configuration with DriverLINX . . . . . . . . . . . . . . . . . . . . . . .3-5

Setting Switch-Configurable Options . . . . . . . . . . . . . . . . . . . . . 3-6

Setting the DAC Bipolar/Unipolar Switch

(DAS-1600 Series Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

iv

Setting the DAC0 and DAC1 Reference Voltage Switches

(DAS-1600 Series Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Setting the ADC Bipolar/Unipolar Switch . . . . . . . . . . . . . . .3-8

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

Setting a Base Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Setting the Clock Select Switch . . . . . . . . . . . . . . . . . . . . . .3-10

Setting the Wait State Enable Switch . . . . . . . . . . . . . . . . . .3-10

Setting the DMA Channel Select Switch . . . . . . . . . . . . . . .3-10

Installing the Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Configuring DriverLINX . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

4

Cabling and Wiring

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

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

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

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 an EXP-1600 Accessory . . . . . . . . . . . . . . . . . . .4-12

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

Attaching SSIO-24 and ERB-24 Accessories . . . . . . . . . . . . . .4-14

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

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 MB01/05 Backplane . . . . . . . . . . . . . . . . . . . .4-20

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

Attaching an STA-MB . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22

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

Connecting a Signal to a Single-Ended Analog Input. . . . . 4-24

Connecting a Signal to a Differential Analog Input . . . . . . .4-25

Avoiding a Ground Loop Problem . . . . . . . . . . . . . . . . . . . . . .4-26

Connecting Analog Output Signals . . . . . . . . . . . . . . . . . . . . . .4-28

Precautions for Operating at High Gains . . . . . . . . . . . . . . . . .4-28

Additional Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-29

5

DriverLINX Analog I/O Panel

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

v

Calibration

6

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

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

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

7

Troubleshooting

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

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

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

Identifying Symptoms and Possible Causes . . . . . . . . . . . . .7-2

Testing the Board and Host Computer . . . . . . . . . . . . . . . . . .7-5

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

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

A

Specifications

Connector Pin Assignments

B

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

PIO Cable Connector (J2) (DAS-1600 Series Only) . . . . . . . . B-2

C

Register-Level Address Map

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

DAC Output Registers (Base Address +4h to +7h)

(DAS-1600 Series Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

DAC0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7

DAC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7

DAC Controller Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8

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

Control Register (Base Address +9h) . . . . . . . . . . . . . . . . . . . C-11

Counter Enable/Burst Length Register (Base Address +Ah) . C-13

Gain Selection/Burst Rate Register (Base Address +Bh) . . . . C-15

Programmable Interval Counter/Timer

(Base Addresses +Ch, +Dh, +Eh, +Fh) . . . . . . . . . . . . . . . . . . C-17

Generating Square Waves of Programmed Frequency . . . . C-20

Measuring Frequency and Period . . . . . . . . . . . . . . . . . . . . C-21

vi

Using Counter 0 for Generating

Programmable Time Delays . . . . . . . . . . . . . . . . . . . . . . . . C-21

82C54 Counter/Timer Control Register

(Base Address +Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-23

Readback Command Byte

(Returned when SC1 and SC0 are 1) . . . . . . . . . . . . . . C-26

Status Byte Format (Returned if STA =0) . . . . . . . . . . . C-27

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

(Base Address +400h to +403h) . . . . . . . . . . . . . . . . . . . . . . . C-27

Control Register (Base Address +403h) . . . . . . . . . . . . . . . C-29

Conversion Disable Register (Base Address +404h) . . . . . . . C-31

Burst Mode Enable Register (Base Address +405h) . . . . . . . . C-32

1600/1400 Mode Enable Register (Base Address +406h) . . . C-32

Status Register B (Base Address +407h) . . . . . . . . . . . . . . . . C-33

CE Mark Information

D

Limitation of Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

List of Figures

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

Figure 2-2. Expanding the Analog Inputs of DAS-1600/1400

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

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

Figure 3-1. Default Switch Configuration for DAS-1600

Series Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-2. Default Switch Configuration for

DAS-1400 Series Boards . . . . . . . . . . . . . . . . . . .3-7

Figure 3-3. Base Address, Clock Select,

and Wait State Enable Switch . . . . . . . . . . . . . . . .3-9

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 to the Main I/O Connector .4-5

Figure 4-4. 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 (J2) . .4-9

vii

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 an EXP-1600 to a DAS-1600/1400

Series Board . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12

Figure 4-12. Attaching Multiple EXP-16, EXP-16/A,

and /or EXP-GP Accessories . . . . . . . . . . . . . . . 4-13

Figure 4-13. Attaching Multiple EXP-1600 Accessories . . . .4-14

Figure 4-14. Attaching an SSIO-24 or ERB-24 Accessory . . . 4-14

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

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

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

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

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

Figure 4-20. Attaching an MB01/05 Backplane . . . . . . . . . . .4-20

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

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

Figure 4-23. Cabling and Connections for

Attaching an STA-MB . . . . . . . . . . . . . . . . . . . . 4-23

Figure 4-24. Connections for Wiring a Signal Source

to a DAS-1600/1400 Series Board Configured for

Single-Ended Inputs . . . . . . . . . . . . . . . . . . . . . .4-24

Figure 4-25. Three Methods of Wiring Differential Inputs . . . 4-25
Figure 4-26. A Differential Input Connection that Avoids

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

Figure 4-27. Differential or Single-Ended Input Connection

that Introduces a Ground Loop Problem . . . . . .4-27

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

on DAS-1600/1400 Series . . . . . . . . . . . . . . . . . B-1

Figure B-2. Pin Assignments of PIO Cable Connector (J2) . B-2

Figure C-1. Programmable Timer Configuration . . . . . . . . . C-17

List of Tables

Table 2-1. DAS-1601/1401 Gains, Ranges, and

Throughput Rates for Unipolar and

Bipolar Selections . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Table 2-2. DAS-1602/1402 Gains, Ranges, and

Throughput Rates for Unipolar and

Bipolar Selections . . . . . . . . . . . . . . . . . . . . . . . . .2-5

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

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

viii

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

Table 4-4. DAC Input and Output Connections . . . . . . . . . .4-28

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

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

Table A-2. Analog Output Specifications . . . . . . . . . . . . . . . A-4

Table A-3. Digital I/O Specifications

(8-bits on Main I/O Connector). . . . . . . . . . . . . . A-5

Table A-4. Digital I/O Specifications (24-bits on

PIO Cable Connector) . . . . . . . . . . . . . . . . . . . . . A-5

Table A-5. Programmable Counter/Timer

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Table A-6. Power Supply Requirements . . . . . . . . . . . . . . . . A-6

Table A-7. Environmental Specifications . . . . . . . . . . . . . . . A-7

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

Table C-2. DAC Bipolar Output Modes . . . . . . . . . . . . . . . . C-8

Table C-3. DAC Unipolar Output Modes . . . . . . . . . . . . . . . C-9

Table C-4. Logic State of Status Register A; MUX (Bit 5). C-10
Table C-5. Logic State of Status Register A; UB (Bit 6) . . C-10
Table C-6. Control Register: Pacer Clock Source Selection C-11
Table C-7. Control Register: Interrupt Level Selection

Bits 4, 5, and 6. . . . . . . . . . . . . . . . . . . . . . . . . . C-12

Table C-8. Gain Selection/Burst Rate Register:

Gain Selection Bits 0 and 1 . . . . . . . . . . . . . . . . C-15

Table C-9. Counter/Timer Address Map. . . . . . . . . . . . . . . C-18

Table C-10. 82C54 Counter/Timer Control Register:

Selecting Functionality . . . . . . . . . . . . . . . . . . . C-23

Table C-11. 82C54 Counter/Timer Control Register:

Bits 4 and 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-24

Table C-12. 82C54 Counter/Timer Control Register:

Readback Command . . . . . . . . . . . . . . . . . . . . . C-25

Table C-13. Counter Status Byte Selection: Bits 0, 1, and 2. C-26

Table C-14. PPI Register Address Map. . . . . . . . . . . . . . . . . C-28

Table C-15. Mode Selection for Ports A and CH . . . . . . . . . C-30

Table C-16. PIO Control Word . . . . . . . . . . . . . . . . . . . . . . . C-30

ix

Preface

This guide describes how to set up, install, and operate the following
Keithley products:

0

The DAS-1601 and DAS-1602 boards, which are referred to

as

collectively
The DAS-1401 and DAS-1402 boards, which are referred to

0

collectively as DAS-1400 Series boards.

DAS-1600 Series boards.

Unless this manual refers specifically to a particular board,
models collectively as the DAS-1600/1400 Series boards.

To

follow the information and instructions contained in this manual, you

must be familiar with the operation of an

(3.x,

computer in the WindowsTM
also be familiar with data acquisition principles and the requirements of
your applications.

95/98,

IBM@

or

PC

NT)

environment.

AT@, or equivalent

it

refers

You

to

must

all

X

Manual Oraanization

The following table lists the topics this guide focuses on and indicates
where you can find information about a topic.

1

Installing the DAS-1600/1400 Series standard software package

I

1

Setting up switch-selectable options

Chapter

I

Chapter

3

3

I

Installing your boards

I/O

Using the DriverLINX Analog
and data acquisition

I

Calibrating the board

I

Troubleshooting and obtaining technical support

I

DAS-

1600/1400

1

I/O

connector pin assignments

The register level

CE

Mark information

xi

Series specifications Appendix A

-

VO

map

Panel software for test

Chapter

1

Chapter

Chapter

I

Chapter

1

Appendix

j

Appendix
Appendix

3

5

6

7

B

C

D

I

I

Related Documents

You can find more information on

accessories in the related documents listed in the following table.

I

EXP-

16

&

EXP-

16/A

Expansion Multiplexer/Amplifier System User’s Guide

I

EXP-GP

1

SSH-4/A Simultaneous Sample & Hold Module User’s Guide

SSH-8

I

ISO-4

EXP-800/1600

Signal Conditioning Multiplexer User’s Guide

User’s Guide

User’s Guide

User’s Guide

DAS-1600/1400

Document

Series software and

I

I

I
I

xii

1

Overview

The DAS-1600/1400 Series is a family of high-performance analog
and digital I/O boards with DriverLINX software requiring:

an IBM PC or compatible AT (386, or Pentium CPU) with 2 MB

●

of memory.

●

at least one floppy disk drive, and one fixed disk drive.

●

MS-DOS/PCDOS 3.1 or higher.

●

Microsoft Windows 3.x or Windows 95/98.
a compiler supporting Microsoft Windows development.

●

a mouse is highly recommended.

●

The DAS-1601 and D AS-1401 are high-gain boards, while the D AS-1602
and DAS-1402 are low-gain boards.

This chapter describes features of the DAS-1600/1400 Series boards, the
software that supports them, and available accessories.

Features

Features shared by the DAS-1600 Series and DAS-1400 Series are
as follows:

Boards are switch-configurable for 16 single-ended or eight

●

differential analog input channels.

●

Analog inputs are switch-configurable for either unipolar (0 to
10 V) or bipolar (±10 V) signals.

Features 1-1

Analog input channels are individually programmable for gain. The

●

DAS-1601/1401 boards have programmable gains of 1, 10, 100, and

500. The DAS-1602/1402 boards ha v e programmable gains of 1, 2, 4,
and 8.

Analog input sampling is a maximum of 100 ksamples/s with

●

12-bit resolution.
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 run by any of the

●

following methods:
– software command
– onboard pacer clock
– external pacer clock
External SSH hardware is supported.

●

Data transfers can run 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.

The boards have four unidirectional digital inputs and four

●

unidirectional digital outputs.

●

The boards are backward compatible with the DAS-16G1 and
DAS-16G2 boards.

Programs for the DAS-16G1 and DAS-16G2 boards run on the
DAS-1600 Series without modification. The DAS-1400 Series
maintains backward compatibility with the analog input section
of the DAS-16G1.

1-2 Overview

DAS-1600 Series boards provide the following additional features:

Two 12-bit digital-to-analog converter (DAC) channels. The

●

outputs of these channels have switch-configurable output ranges of
0 to 5 V, 0 to 10 V, ±5 V, and ±10 V full scale. In addition, you can
apply an external reference to provide analog outputs in other
ranges or to use the DACs as programmable attenuators.

An additional 24 bits of bidirectional digital I/O by way of the PIO

●

cable connector (J2). These 24 bits are configured as two 8-bit ports
and two 4-bit ports that you can set independently for input or output.

The 24-bit digital port is compatible with the Keithley MetraByte
PIO-12 board. You can use these ports to gate the counter/timer,
control multiplexers, and read the status of external devices.

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

Supporting Software

The following software is available for operating DAS-1600/1400
Series boards:

DAS-1600/1400 Series standard software package

●

- Shipped with
DAS-1600/1400 Series boards. Includes DriverLINX® for
Microsoft® Windows and function libraries for writing application
programs under Windows™ in a high-level language such as
Microsoft Visual C++; Microsoft Visual Basic; Borland Delphi

®

;

utility programs; and language-specific example programs.

●

DriverLINX-

the high-performance real-time data-acquisition device

drivers for Windows application development including:
–

DriverLINX API DLLs

and drivers supporting the

DAS-1600/1400 Series hardware

–

Analog I/O Panel -

A DriverLINX program that verifies the
installation and configuration of DriverLINX to your
DAS-1600/1400 Series board and demonstrates several virtual
bench-top instruments

Supporting Software 1-3

–

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

for the

DAS-1600/1400 Series compiler

–

DriverLINX On-line Help System -

provides immediate help as

you operate DriverLINX

–

Supplemental Documentation -

on DriverLINX installation and
configuration; analog and digital I/O programming; counter/timer
programming; technical reference; and information specific to the
DAS-1600/1400 Series hardware.

DAS-1600/1400 Series utilities -

●

The following utilities are provided

as part of both the DAS-1600/1400 Series standard software package:
– Calibration Utility
– Test Utility

1-4 Overview

Accessories

The following accessories are available for use with the DAS-1600/1400
Series boards.

●

STA-16 - Screw-terminal adapter accessory that connects to the main

I/O connector of a DAS-1600/1400 Series board through a C-1800
cable.

●

STA-U

- Universal scre w-terminal accessory that connects to the PIO

cable of a DAS-1600/1400 Series board through a C-1800 cable.

●

STC-37

- Direct DAS-1600/1400 Series board to screw

terminal interface.

●

STP-37

- Screw-terminal panel that connects to the main I/O

connector of a DAS-1600/1400 Series board through a C-1800 cable.

●

ISO-4

- 4-channel isolated expansion multiplexer.

●

SSH-4/A

- 4-channel simultaneous sample-and-hold accessory that
connects to the main I/O connector of a DAS-1600/1400 Series board
through a C-1800 cable. You can cascade additional SSH4/A
accessories through CACC-2000 cables.

●

SSH-8 - 8-channel simultaneous sample-and-hold accessory that

connects to the main I/O connector of a DAS-1600/1400 Series board
through a C-1800 cable.

●

MB Series modules and backplanes

- Plug-in, isolated,
signal-conditioning modules and the backplanes that hold them.
Supported backplanes include the MB01, MB02, and MB05.

●

STA-MB

- Screw terminal accessory for MB Series modules. The
STA-MB connects to a DAS-1600/1400 Series board through a
C-1800 cable and contains mounting holes for up to four MB Series
modules. The STA-MB brings all signal lines from the
DAS-1600/1400 Series board and all inputs and outputs from the MB
Series modules out to external screw terminals.

STA-SCM16

●

- Screw terminal accessory that attaches to the main
I/O of a DAS-1600/1400 Series board through a C-1800 cable and
attaches to up four MB02 backplanes through C-2600 cables.

●

EXP-16 and EXP-16/A

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

Accessories 1-5

●

PG-408A

is a snap-in DC/DC converter module for an EXP-16 or

EXP-16/A used with a DAS-1600/1400 Series board.

●

EXP-1600

to DAS-1600 Series boards. Refer to the

- 16-channel expansion accessory that connects directly

EXP-1600 User’s Guide

more information.

●

SSIO-24

- 24-channel mounting panel for up to 24 solid-state,
miniature I/O modules with functions of DC input, DC output, AC
input, and AC output. The SSIO-24 connects to the PIO cable of a
DAS-1600/1400 Series board through a C-1800 cable.

for

●

ERB-24

- electrical relay board. This accessory provides 24
electromechanical double-pole, double-throw relays for controlling
and switching up to 3 A at 120 V

. The ERB-24 connects to the PIO

rms

cable of a DAS-1600/1400 Series board through a C-1800 cable.

●

C-1800

- Cable for attaching the main I/O connector of a
DAS-1600/1400 Series board to an STA-16, ST A-MB, STA-SCM-16,
STP-37, SSH8, or SSH4/A accessory. This cable can also be used to
connect the PIO cable of a DAS-1600 Series board to an STA-U,
SSIO-24, ERB-24 accessory, or to cascade additional EXP-GP,
EXP-16, or ISO-4 accessories.

S-1800

●

●

CACC-2000

●

S-1600

- Shielded version of the C-1800 cable.

- Cable for cascading additional SSH-4/A accessories.

- Cable for attaching an STA-16 or STA-MB to an EXP-16,

EXP-GP, or ISO-4 accessory.

●

CAB-3740

- Cable for attaching the main I/O connector of a

DAS-1600/1400 Series board to an EXP-1600 accessory.

●

CAB-40/1
C-16MB1

●

- Cable for cascading additional EXP-1600 accessories.

- Cable for attaching the main I/O connector of a

DAS-1600/1400 Series board to an MB01/05 backplane.

●

C-2600

- Cable for attaching an STA-SCM16 to an MB02 backplane.

1-6 Overview

2

Functional Description

This chapter describes the following features of DAS-1600/1400
Series boards:

Analog input

●

Analog output

●

●

Digital I/O

●

82C54 counter/timer
Wait state selection

●

●

Power

These descriptions are offered to familiarize you with the operating
options and to enable you to make the best use of your board. The block
diagram in Figure 2-1 represents both the DAS-1600 and DAS-1400
Series boards.

2-1

diff./S.E.

ch 0/0

ch 7/15

DAS1600 Series only

D/A 0

ref in

D/A 0

out

D/A 1

out

D/A 1

ref in

selection

8 or 16

analog

input

channels

10 V, 5 V or user

selection

DAC 0 12-bit

multiplying D/A

unipolar/bipolar

selection

DAC 1 12-bit

multiplying D/A

10 V, 5 V or user

selection

unipolar/bipolar

selection

instrumentation

amplifier

gain

selection

data

buffers

mux increment
& control logic

internal data bus

control

register

address decode

& select

sampling

12-bit ADC

ADC & mux
data register

register

clock
select

logic
timer

enable

register

control logic

DMA

level select

status

DMA

DAS1600 Series only

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 0/xpclk

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

Analog Input Features

The analog input section of a DAS-1600/1400 Series board multiplexes
all the active input channels (up to 16 single-ended or eight differential)
into a single, 12-bit, sampling, analog-to-digital converter (ADC).

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 subsections.

2-2 Functional Description

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.

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
nonground 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 depends on the
application. However, you generally use differential inputs for voltage
ranges of 100 mV and less.

Unipolar/Bipolar Selection

Using configuration switches, you can set the DAS-1600/1400 Series
boards to operate in either unipolar or bipolar input mode. A unipolar
signal is always positive (0 to 10 V, for example), while a bipolar signal
can swing up and down between negati ve and positi v e peak v alues (
to +10 V, for example).

−

10 V

The DAS-1600/1400 Series boards use left-justified, offset binary to
represent signals. In a given input range with the same peak-voltage
capacity for both modes, unipolar mode doubles the converter’s
resolution.

Channel Selection in Expanded Configurations

As previously mentioned, the DAS-1600/1400 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 attach EXP-16, EXP-16/A, EXP-GP, or EXP-1600
expansion accessories. Attaching any combination of up to eight
16-channel EXP-16 or EXP-16/A accessories, and/or eight 8-channel
EXP-GP accessories can increase the number of available channels to

128. Attaching up to sixteen 16-channel EXP-1600 accessories can
increase the number of available channels to 256.

Analog Input Features 2-3

When you daisy-chain expansion boards from the analog inputs, you are
advised to make the first expansion board multiplex onboard channel 0,
the next expansion board multiplex channel 1, and so on. You select an
onboard channel using jumper settings on the expansion board.

You can access any unused onboard channels by placing an ST A-16 screw
terminal accessory first in the daisy-chain configuration. Figure 2-2
illustrates how expansion boards and accessories interface with the analog
channels of DAS-1600/1400 Series boards.

DAS-1600/1400
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-1600/1400 Series Boards

EXP-16,
EXP-16/A
EXP-1600

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

EXP-GPSTA-16

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, EXP-GP, or EXP-1600 expansion
accessories or MB Series backplanes, the digital output lines of the
DAS-1600/1400 Series board select a particular channel on the expansion
board or backplane to read.

2-4 Functional Description

Gain Selection

The programmable gain 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 ±10 V range and you want
to measure a signal in the range of ±1.0 V, you would use a gain of 10 to
amplify the signal to the ±10 V range. Similarly, if you wanted to measure
a signal that was already in the ±10 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-1601/1401 and Table 2-2 for the
DAS-1602/1402.

Table 2-1. DAS-1601/1401 Gains, Ranges, and Throughput

Rates for Unipolar and Bipolar Selections

Maximum

Gain Unipolar Range Bipolar Range

Throughput

Rate

1 0.0 to +10.0 V

10 0.0 to +1.0 V
100 0.0 to +100 mV
500 0.0 to +20 mV

−

10.0 to +10.0 V 100 ksamples/s

−

1.0 to +1.0 V 100 ksamples/s

−

100 to +100 mV 70 ksamples/s

−

20 to +20 mV 30 ksamples/s

Table 2-2. DAS-1602/1402 Gains, Ranges, and Throughput

Rates for Unipolar and Bipolar Selections

Maximum

Gain Unipolar Range Bipolar Range

1 0.0 to +10.0 V
2 0.0 to +5.0 V
4 0.0 to 2.5 V
8 0.0 to 1.25 V

Analog Input Features 2-5

−

10 to +10 V 100 ksamples/s

−

5.0 to +5.0 V 100 ksamples/s

−

2.5 to + 2.5 V 100 ksamples/s

−

1.25 to +1.25 V 100 ksamples/s

Throughput

Rate

Conversion Modes

DAS-1600/1400 Series boards support the following conversion modes:

Paced mode

●

- Paced mode is the default data con v ersion mode and 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 sampled.

●

Burst mode

- In burst mode, each pulse from the pacer clock begins a
scan of one to 16 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-1600/1400 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.
DAS-1600/1400 Series boards support burst mode only during DMA

operations. You can also use burst mode for pseudo-simultaneous
sample-and-hold in conjunction with DMA operations.

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.

2-6 Functional Description

Pacer Clock

Paced Mode Conversions

Burst Mode Conversions

Burst Mode Conversion Clock

Figure 2-3. Timing Relationships of Conversion Modes

Clock Sources

CH4

CH4

CH5

CH6

CH7

CH5

CH4 CH5

CH6

CH7

The following clock sources are available for conversions on
DAS-1600/1400 Series boards:

●

Software

- DAS-1600/1400 Series boards allo w 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, and 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 and analog outputs (on the
DAS-1600 Series boards), through the use of interrupts.

●

Hardware (external clock sour ce)

- 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).

Analog Input Features 2-7

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.

Triggers

Notes:

The ADC acquires samples at a maximum of 100 ksamples/s (one
sample every 10.0 µs). If you are using an external clock, make sure 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.

A trigger starts an analog input operation. The polarity of external triggers
in the DAS-1600/1400 Series boards is software-configurable. You can
use one of the following trigger sources to start an analog input operation:

●

Internal

- When you enable the analog input operation, conversions

begin immediately.

●

External Analog

- While an analog trigger is not a hardware feature
of the DAS-1600/1400 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 Installation and Configuration Guide

and

Appendix F:
Configuration and Implementation Notes—for Keithley MetraByte
DAS-16/1600

manuals for more information.

●

External Digital

- While a digital trigger is not a hardware feature of
the DAS-1600/1400 Series boards, you can apply a digital trigger to
the digital input IP1/XTRIG pin (6) of the main I/O connector (J1).
Refer to the

DriverLINX Installation and Configuration Guide

and

Appendix F: Configuration and Implementation Notes—For Keithley
MetraByte DAS-16/1600

manuals.
Trigger types are as follows:
–

Positive-edge trigger

- Conversions begin on the rising edge of

the trigger signal.

2-8 Functional Description

–

Negative-edge trigger

the trigger signal.

–

Positive-level trigger

is above a positive level. See Table A-3 on page A-5 for
logic levels.

–

Negative-level trigger

is below a negative level. See Table A-3 on page A-5 for
logic levels.

Data T ransfer Modes

You can transfer data from the DAS-1600/1400 Series boards to the
computer using the following data transfer modes:

- Conversions begin on the falling edge of

- Conversions begin when the signal

- Conversions begin when the signal

Single mode

●

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

Synchronous

●

- In a synchronous-mode operation, a data acquisition
board acquires one or more samples from one or more channels; you
cannot perform any other operation until the synchronous-mode
operation is complete.

Interrupt

●

- You can program the board to acquire data, then generate
an interrupt when data is available for transfer. When interrupt mode
is used, data is transferred by an interrupt service routine; you can
perform other operations while an interrupt mode operation is in
progress. The interrupt level is software-configurable.

Unpredictable interrupt latencies in the W indo ws en vironment tend to
make maximum board speeds unachievable in the interrupt mode.
When in the Windows environment, you are advised to use DMA
mode instead of interrupt mode.

DMA

●

- DMA is a method of bypassing the CPU to transfer data
directly between an I/O device and computer memory. In the IBM PC
family, DMA is directed by the DMA controller and executes
independently while the CPU is executing other instructions.
Therefore, you can perform other operations while a DMA mode
operation is in progress. The ability to run independently of the CPU
and at high-transfer rates makes DMA an attractive method for
transferring data in data acquisition systems.

Analog Input Features 2-9

DAS-1600/1400 Series boards can use either DMA channel 1 or 3
to perform single-cycle DMA transfers of A/D data from the board
to memory.

Analog Output Features (DAS-1600 Series Only)

The analog output section of DAS-1600 Series boards consists of two
digital-to-analog converters (D A Cs) with 12-bit resolution and a precision
voltage source. Both DACs have switch-configurable output ranges of 0
to 5 V, 0 to 10 V, ±5 V, ±10 V. In addition, you can use external references
to generate analog outputs in other ranges. The DACs power up to 0 V
at reset.

The two DACs have a capacitive load drive up to 100 µF and an output
current drive of up to ±5 mA.

You can pace the analog output with interrupts generated by the onboard
pacer clock when the analog inputs are disabled.

You can write single values to the DACs using synchronous mode or
single mode. You can write multiple values to the DACs using
synchronous mode or interrupt mode.

The DAS-1600 Series provides a
voltage that is derived from the DAC reference voltage. Typical
applications for precision voltages are providing a DC reference input for
the DACs and providing offsets and bridge excitation to user-supplied
input circuits.

5 V (±0.05 V) precision reference

−

Digital I/O Features

DAS-1600/1400 Series boards contain four digital inputs (IP0 to IP3) and
four digital outputs (OP0 to OP3) that are accessible through the main I/O
connector (J1).

Logic 1 on an I/O line indicates that the input/output is high; logic 0 on an
I/O line indicates that the input/output is low (see Table A-3 on page A-5
for logic levels). The digital inputs are compatible with TTL-le vel signals.

2-10 Functional Description

These inputs are provided with 10 kΩ pull-up resistors to +5 V; therefore,
the inputs appear high (logic 1) with no signal connected.

The DAS-1600 Series boards have an additional 24 bits of bidirectional
digital I/O available on the PIO cable connector (J2). These 24 bits are
configured as two 8-bit ports (A and B) and two 4-bit ports (CL and CH);
you can set each port independently for input or output.

You can use the digital inputs and outputs for any general-purpose tasks
except the following:

If you are using an external digital trigger or gate, you must use

●

digital input line IP1/XTRIG to attach the trigger and digital input
line IP2/CTR 0 GATE to attach the counter 0 gate signal. In either of
these cases, you cannot use the corresponding bit for general-purpose
digital input.

●

If you are using an external pacer clock, you must use digital input
line IP0/TRIG 0/XPCLK to attach the external pacer clock signal; in
this case, you cannot use IP0/TRIG 0/XPCLK for general-purpose
digital input.

When the analog inputs are disabled, you can pace the digital I/O with
interrupts generated by the onboard pacer clock.

You can read or write a single value from or to a DAS-1600/1400 Series
board using synchronous mode or single mode. You can read or write
multiple values from or to a DAS-1600/1400 Series board using
synchronous mode or interrupt mode.

Counter/Timer Features

The DAS-1600/1400 Series includes an 82C54 with three programmable
counters. Counters 1 and 2 are permanently cascaded and are used as the
internal A/D pacer clock.

Counter 0 is not used by the board, but can be used for functions such as
waveform generation, measuring frequency and period, and generating
time delays. You access counter 0 functions through the board’s I/O
registers or through DriverLINX.

Counter/Timer Features 2-11

Note:

functions with DriverLINX programming can produce unexpected
results.

You can use software to select IP0/TRIG 0/XPCLK (pin 25) of the main
I/O connector for use as a hardware gate. The gate provides a means of
holding off clock pulses (from counters 1 and 2) to the ADC until
IP0/TRIG 0/XPCLK goes high.

Attempts to combine register-level programing of counter/timer

Wait State Selection

Although most current-generation PCs and compatibles extend bus cycles
during 8-bit data transfers, the DAS-1600/1400 Series provides a
switch-configurable option that allows you to enable or disable wait states
that extend bus cycles during 8-bit data transfers.

Inclusion of this option maintains backward compatibility with
DAS-16Gx Series boards that may be used in early generation machines.

Power

+5 V power is available from the main I/O connector. The +5 V supply is
brought out from your host computer.

2-12 Functional Description

3

Setup and I

Read this chapter and all related DriverLINX documentation before you
attempt to install and use your DAS-1600/1400 Series board.

nstallation

Unwrapping and Inspecting Your Board

After you remove the wrapped board from its outer shipping carton,
proceed as follows:

1. Your board is packaged at the factory in an anti-static wrapper that
must not be removed until you have discharged any static electricity
by either of the following methods:

– If you are equipped with a grounded wrist strap, you discharge

static electricity as soon as you hold the wrapped board.

– If you are not equipped with a grounded wrist strap, discharge

static electricity by holding the wrapped board in one hand while
placing your other hand firmly on a metal portion of the computer
chassis (your computer must be turned off but grounded).

2. Carefully unwrap your board from its anti-static wrapping material.
(You may wish to store the wrapping material for future use.)

3. Inspect the board for signs of damage. If damage is apparent, arrange
to return the board to the factory (see “Technical Support” on page
7-6).

4. Check the remaining contents of your package against the packing list
to be sure your order is complete. Report any missing items,
immediately.

5. When you are satisfied with the inspection, proceed with the software
and hardware setup instructions.

Unwrapping and Inspecting Your Board 3-1

Note:

no further adjustment prior to installation. If at a later time you decide to
re-calibrate the board, refer to Chapter 6 for instructions.

DAS-1600/1400 Series boards are factory calibrated; they require

Installing and Configuring DriverLINX for DAS-1600/1400
Series Boards

Important:

As a precaution against a system crash the first time
you install and test any new hardware, you should exit all other
programs and, if you use a disk cache, disable write caching. If
the system does crash and you’re using disk compression
software or a disk cache utility, as a precaution after any crash,
run the utility that checks the directory structures.

This section describes how to install the DAS-1600/1400 Series standard
software package. The contents of these software packages are described
as follows:

●

DAS-1600/1400 Series standard software package

DAS-1600/1400 Series boards. Includes DriverLINX® for
Microsoft® Windows and function libraries for writing application
programs under Windows™ in a high-level language such as
Borland® C/C++, Borland Turbo Pascal®, and Mircrosoft Visual
Basic; Delphi®, T est Point®, LabVIEW® support files; utility
programs; and language-specific example programs.

DriverLINX-

●

drivers for Windows application development includes:
–

DriverLINX API DLLs

DAS-1600/1400 Series hardware

the high-performance real-time data-acquisition device

and drivers supporting the

- Shipped with

–

Analog I/O Panel -

installation and configuration of DriverLINX to your
DAS-1600/1400 Series board and demonstrates several virtual
bench-top instruments

–

Learn DriverLINX -

program for DriverLINX that includes a Digital
Storage Oscilloscope

3-2 Setup and Installation

A DriverLINX program that verifies the

an interactive learning and demonstration

–

Source Code -

–

DriverLINX Application Programming Interface files -

for the sample programs

for the

DAS-1600/1400 Series compiler

–

DriverLINX On-line Help System -

provides immediate help as

you operate DriverLINX

–

Supplemental Documentation -

on DriverLINX installation and
configuration; analog and digital I/O programming; counter/timer
programming; technical reference; and information specific to the
DAS-1600/1400 Series hardware.

●

DAS-1600/1400 Series utilities -

The following utilities are provided

as part of both the DAS-1600/1400 Series standard software package:
– Calibration Utility
– Test Utility

LV-1600 -

●

LabVIEW driver for the DAS-1600/1400 Series boards.

Installing the DAS-1600/1400 Series Standard
Software Package

Important—

DAS-1600/1400, read the

Guide

and the

DAS-16/1600 Series

software. They are accessed from the DriverLINX CD-ROM after you
have installed Adobe Acrobat®.

Before Installing DriverLINX

1. Inventory your DAS-1600/1400 board’s configuration settings.

2. Determine the resources your DAS-1600/1400 Series board requires.

3. Inventory your computer’s resources already allocated to other
installed devices.

4. Determine whether your computer has sufficient resources for your
DAS-1600/1400 board.

Before you begin installing any hardware or software for the

DriverLINX Installation and Configuration

Using DriverLINX with your Hardware—Keithley

manuals that are packaged with the DriverLINX

Unwrapping and Inspecting Your Board 3-3

5. Determine whether your DAS-1600/1400 board can use your
computer’s free resources.

6. Set any jumpers/switches to configure your DAS-1600/1400 board to
use your computer’s free resources.

7. Set any other jumpers/switches to configure your DAS-1600/1400
board the way you want.

8. Install your DAS-1600/1400 board into an appropriate free slot in
your computer.

Selecting the DriverLINX components to Install

For your convenience in installing and uninstalling just the DriverLINX
components you need, the DriverLINX CD Browser will assist you in
selecting the components to install:

Install Drivers—

●

need for configuring your hardware and running third-party
data-acquisition applications that require DriverLINX.

Install Interfaces—

●

example programs that you will need to develop custom applications
for DriverLINX using C/C++, Visual Basic, Delphi, and LabVIEW.

●

Install Documentation—

documentation for DriverLINX that you can read, search, and print
using the Adobe Acrobat Reader.

●

Install Acrobat—

Acrobat Reader for the DriverLINX electronic documentation.

Installing DriverLINX

1. Insert the DriverLINX CD-ROM into your computer’s
CD-ROM Drive.

2. Start the DriverLINX setup program. On most systems, wait a few
seconds for automatic startup. Otherwise, run the setup.exe program
from the CD-ROM.

3. The DriverLINX CD-ROM Browser Map window appears on the
screen. Click ‘Install Drivers,’ and follow the series of
on-screen instructions.

This required component installs only the files you

This optional component installs the files and

This optional component installs electronic

This optional component installs the Adobe

3-4 Setup and Installation

Note:

browser map that appears next and on subsequent setup screens, place the
mouse pointer over the menu item. A star next to a menu item means that
the item was selected previously.

4. Select ‘Read Me First,’ and follow the instructions.

5. Select ‘Install Documentation.’ If you do not have Adobe Acrobat

6. Open the manuals appropriate to the DAS-1600/1400 installation

T o display an e xplanation of a menu option on the Driv erLINX CD

installed on your computer, install it by selecting ‘Install
Adobe Acrobat. ’

and read them before installing your DAS-1600/1400 board or
configuring DriverLINX:

– Installation and Configuration
– Appendix F: Configuration and Implementation Notes—for

Keithley DAS-16/1600
– DriverLINX Technical Reference Manual
– DriverLINX Analog I/O Programming Guide
– DriverLINX Digital I/O Programming Guide
– DriverLINX Counter/Timer Programming Guide
– Appendix, I/O Port, Interrupt, and DMA Channel Usage
– Other manuals appropriate to your installation.

Configuration with DriverLINX

Follow the DriverLINX on-screen instructions for installation of drivers
and interfaces. Refer to the

Guide

and

Appendix F: Configuration and Implementation Notes—for

Keithley DAS-16/1600

Note:

installations for Windows NT and Windows 95/98.

Unwrapping and Inspecting Your Board 3-5

Be sure to note and follow all programming differences between

DriverLINX Installation and Configuration

manuals.

Before you configure DriverLINX for operation with the D AS-1600/1400
Series board, you must specify the base address, interrupt level, and input
configuration by setting switches on the board.

Setting Switch-Configurable Options

This section contains information and illustrations that you can use to
verify default switch configurations and reconfigure switch-configurable
options. Chapters 1 and 2 contain information about product features that
help you determine the board configuration that best suits the needs of
your application.

Be sure to make note of the configuration of all switches and jumpers on
the board. You will use this information to enter the correct configuration
parameters using DriverLINX. Also locate any information or notes about
the interrupt and DMA channels used by the other hardware devices in
your computer system.

Figure 3-1 shows the switches for DAS-1600 Series boards; Figure 3-2
shows the switches for the DAS-1400 Series boards. The remaining
subsections describe the switches and how to configure them.

3-6 Setup and Installation

UNI0 BIP0 G0 UNI1 BIP1 G1 UNIA BIPA GA

TP 1

TP 2

o
n

BIP

DAC

UNI

S1

1 2

0 1

10

DAC0

S2

J2

5

5

U

in the ON position

U

10

DAC1

S3

Note that a switch

outputs a logic 0

BASE ADDRESS

987654
12345678

o
n

BIP

RT0 RT1

UNI

S4

location of TP2 on
boards prior to rev D2

CLK SEL
WAITEN

S6

CHAN

S5

J1

S7

13

DMA SEL

Figure 3-1. Default Switch Configuration for DAS-1600 Series Boards

UNIBIP

GN

TP 1

BIP UNI

TP 2

RT1RT0

S1

16 8

S2

16 8

CHAN

location of TP2 on
boards prior to rev C

S3

BASE
ADDR

Note that a switch

in the ON position

outputs a logic 0

12345678

o
n

987654

DMA SEL

13

C

W

S4

J1

Figure 3-2. Default Switch Configuration for DAS-1400 Series Boards

Setting Switch-Configurable Options 3-7

Setting the DAC Bipolar/Unipolar Switch
(DAS-1600 Series Only)

Switch S1 is a 2-position switch that sets DAC 0 and DAC 1 for unipolar
(UNI) or bipolar (BIP) mode. The left switch (labeled 0) is for DAC 0; the
right switch (labeled 1) is for DA C 1. Switch either section On for bipolar
or Off for unipolar. The default is bipolar.

Setting the DAC0 and DAC1 Reference Voltage Switches
(DAS-1600 Series Only)

Switches S2 and S3 are 3-position switches offering 10, 5, and U
selections. When you set up a DAC for bipolar (BIP), the 5 and 10
positions select ±5 V and ±10 V , respectively . When you set up a DA C for
unipolar, the 5 and 10 positions output 0 to 5 V and 0 to 10 V, respectiv ely.

The U position on both switches selects the external reference voltage that
you connect to D/A 0 REF IN (pin 10) and D/A 1 REF IN (pin 26). The
default setting selects a +5 V reference signal for both DAC 0 and DA C 1.

For additional information on user-supplied reference voltages, see Vin
definitions given in Table C-2 and Table C-3.

Setting the ADC Bipolar/Unipolar Switch

Switch S4 on the DAS-1600 Series board (S2 on the DAS-1400 Series) is
a 2-position switch that sets A/D operation to bipolar (BIP) or unipolar
(UNI) mode. The default setting is bipolar (BIP).

Setting the Chan 8/16 Switch

Switch S5 on the DAS-1600 Series board (or switch S1 on the DAS-1400
Series board) is a 2-position switch that configures the A/D inputs as eight
differential or 16 single-ended inputs. The default setting is eight
differential inputs.

3-8 Setup and Installation

Setting a Base Address

Switch S6 on the DAS-1600 Series board (S3 on the DAS-1400 Series) is
a single, 8-position DIP switch that accommodates the base address, the
clock select, and the wait state enable parameters. The default base
address setting is 300h (786 decimal).

Figure 3-3 shows the default switch positions for the base address, clock
select, and wait state enable switches.

Address

A4
A5
A6
A7
A8
A9

Hex

Value Line

10 16
20 32
40 64
80 128
100 256
200 512

Decimal

Value

12345678

o
n

CLK SEL

WAITEN

On = 1 MHz
Off = 10 MHz

On = No
Off = Yes

Note that a switch in the ON
position outputs a logic 0.

Figure 3-3. Base Address, Clock Select, and Wait State Enable Switch

987654

BASE ADDRESS

CW

The base address is read from the 8-position DIP switch located as shown
in Figure 3-1 for a DAS-1600 Series board and Figure 3-2 for a
DAS-1400 Series board. The base address switch on DAS-1600/1400
Series boards is preset at the factory for a hexadecimal value of 300h (768
decimal). If this address conflicts with the address of another device in the
computer (including another DAS-1600/1400 Series board), you must
reconfigure the base address switch.

Setting Switch-Configurable Options 3-9

To reconfigure this switch for another address, perform the
following steps:

1. Select an alternate address that does not conflict with another
installed device.

2. Make note of this address for configuration using DriverLINX.

3. Set up the base address switch to match the new base address.

Note:

that are configured in DriverLINX.

The settings for the base-address switch must match the settings

Setting the Clock Select Switch

Position number 7 of the base address switch (see Figure 3-3) selects
either a 1 MHz or 10 MHz clock for the internal pacer clock. The default
is 10 MHz (Off).

Setting the Wait State Enable Switch

Position number 8 of the base address switch (see Figure 3-3) enables
wait states. The default setting is NO (On). If you experience intermittent
errors, you may correct the problem by setting this option to YES (Off).

Setting the DMA Channel Select Switch

Switch S7 (S4 on the DAS-1400 Series) is a 2-position slide switch that
selects DMA channel 1 or 3. The default setting is 3.

3-10 Setup and Installation

Installing the Board

Caution:

your computer.

After reviewing your computer manufacturer’s documentation for
accessing computer internals, use the following steps to install a
DAS-1600/1400 Series board in an accessory slot of your computer:

1. Turn off power to the computer and all attached equipment.

2. Remove the computer chassis cover.

3. Select an unoccupied accessory slot, and remove the corresponding

4. If you are installing a DAS-1600 Series board and your application

Installing or removing a board while power is on can damage

Note:

You must observe the current-capacity limits of the PC supply;
allow for the power used by any other boards that may be in use. See
Table A-6. for DAS-1600/1400 Series power requirements.

blank plate and retaining screws from the I/O connector panel. Save
the retaining screws for re-use in later steps.

uses the additional 24-bit digital I/O, remove the blank plate and
retaining screws of the adjacent slot. Save the retaining screws for
re-use in later steps.

5. Make sure the option switch settings match the settings shown in the
configuration-utility switch diagram.

6. Insert the board in the selected slot and secure the main I/O connector
mounting flange with the retaining screws.

7. When using the additional 24-bit digital I/O of a DAS-1600 Series
board, connect the board end of the PIO cable to the PIO cable
connector (J2) on the board. When connecting the cable, align the
raised arrow of the PIO cable with the arrow imprinted on the PIO
cable connector (J2). Secure the mounting flange on the PIO cable to
the connector panel next to the main I/O connector (J1) with the
retaining screws.

8. Replace the computer cover.

9. Turn on power to the computer.

Installing the Board 3-11

Configuring DriverLINX

After you have successfully installed the DAS-1600/1400 Series board in
your computer, start Windows to install DriverLINX. For detailed
instructions on installing DriverLINX, see the documentation provided on
the DriverLINX CD-ROM; especially the

Configuration Guide
Notes—for Keithley DAS-16/1600

DriverLINX Installation and

and

Appendix F: Configuration and Implementation

manuals.

Run “Learn DriverLINX”
program group to tell DriverLINX how you configured your
DAS-1600/1400 Series board and to verify that everything is properly
installed and configured.

1. Start Windows as you normally would and select the Program
Manager window. Install DriverLINX if you have not previously
done so.

2. Either select the “Learn DriverLINX” icon created when you installed
DriverLINX or enter “<drive>:/DRVLNX/LEARNDL” in the

Command Line

selecting
hard disk drive where DriverLINX is installed.

3. Immediately after loading Learn DL, the Open DriverLINX DLL
dialog box appears. Select the name of the hardware-specific DLL
from the list for your DAS-1600/1400 board. The name is an
abbreviation of the board’s model number.

4. From the main menu bar of Learn DL, select the Device menu and
choose Select...

5. Select the Logical Device you wish to configure and then click on the
OK button (return).

edit box. The Command Line edit box is activated by

Run... option from the File menu. <dri v e> is the letter of the

(LearnDL.exe)

from the DriverLINX

6. Again select the Device menu and then choose the Configur e... option
to display the Device Configuration Dialog Box.

7. From the Model list, select the model name for your DAS-1600/1400
Series board you are configuring.

8. If the value displayed in the Address edit box is not correct, type the
correct value into the box. You may enter the address in decimal or
hexadecimal using the c-notation for hex, (that is, 768 decimal =
0x300 hexadecimal).

3-12 Setup and Installation

9. Choose the correct options for the Analog, Digital, and
Counter/Timer Sections by first clicking on the appropriate radio

button in the middle of the dialog box and then completing the group
of dialog fields in the lower third of the dialog box. Be sure to click on
both the Input and Output radio buttons for the Analog and Digital
groups to see all the dialog fields.

10. After you have made your selections, save the configuration
parameters by clicking on the OK button. This will create or update
the configuration file, KMBDAS16.INI, in the Windows directory.

11. Repeat the preceding steps starting at step 5, for each Logical Device
you wish to configure.

You can use DriverLINX to verify board operation:

1. To physically initialize the DAS-1600/1400, select Device/Initialize
from the main menu in Learn DriverLINX.

2. The first time the DAS-1600/1400 is initialized, or after a
configuration change, DriverLINX runs a diagnostic program to
verify the operation and accuracy of the configuration settings.

You are now ready to make I/O connections. Refer to Chapter 4
for descriptions of common I/O accessories and connections for
DAS-1600/1400 Series Boards

You can use the control panel (see Chapter 5) to verify board operation.

Installing the Board 3-13

4

Cabling and Wiring

In most applications, you use accessories to connect external I/O devices
to the DAS-1600/1400 Series boards. K eithley accessories extend signals
from the main I/O connector (J1) and the PIO cable connector (J2) to
corresponding screw terminals of the accessory.

In the case of DAS-1600 Series boards, 24 bits of parallel bidirectional
digital I/O is channeled to the rear panel of the host PC by a flat ribbon
cable known as the PIO cable. The board end of the PIO cable attaches to
the PIO cable connector (J2) on the board. The other end of the PIO cable
is fitted with a standard 37-pin D-type connector and a mounting flange
that installs in the connector panel next to the main I/O connector (J1).
The PIO cable comes with all DAS-1600 Series boards.

This chapter describes the cabling and accessories required for attaching
field wiring to your DAS-1600/1400 Series boards.

Caution:

any attached accessories before making connections to DAS-1600/1400
Series boards.

To avoid electrical damage, turn off power to the computer and

4-1

Attaching Screw Terminal Accessories

You can use the following screw terminal connectors and accessories to
simplify connection of field wiring to DAS-1600/1400 Series boards:

●

STC-37 screw terminal connector; when using a DAS-1600 Series
board, your application may require two connectors

●

STP-37 screw terminal panel; when using a DAS-1600 Series board,
your application may require two panels

●

STA-16 screw terminal accessory
STA-U universal screw terminal accessory

●

The following sections describe how to attach these accessories to
DAS-1600/1400 Series boards.

Attaching an STC-37

The screw terminals on the STC-37 screw-terminal connector allow you
to connect field wiring to a DAS-1600/1400 Series board. The screw
terminals accept wire sizes 12-22 AWG.

To connect an STC-37 to the main I/O connector (J1) of a
DAS-1600/1400 Series board, attach the 37-pin connector on the STC-37
directly to the main I/O connector (J1). Figure 4-1 illustrates the
connection of an STC-37 to a DAS-1400 Series board.

Note:

Your application may require connections to the main I/O
connector (J1) and connections to the PIO cable connector (J2). When
two STC-37 connectors are required, you should consider wire sizes and
service area requirements. These considerations may suggest the use of an
alternate accessory.

4-2 Cabling and Wiring

STC-37 Screw Terminal

Connector

21

17

16

DAS-1400 Series board

J1

5

4

pin 1

1

strain relief

Figure 4-1. Attaching an STC-37 Screw Terminal Connector

37

34

33

22

The screw terminals are labeled from 1 to 37 and correspond directly to
the functions of the pins on the main I/O connector (see Figure 4-2). For
example, since pin 25 is assigned to IP0/TRIG 0/XPCLK, use screw
terminal 25 to attach a digital signal to bit 0 of the standard digital
input port.

Attaching Screw Terminal Accessories 4-3

Rear View

LL GND Pin 19
Ch0 LO IN / Ch8 HI IN Pin 18

Ch1 LO IN / Ch9 HI IN Pin 17
Ch2 LO IN / Ch10 HI IN Pin 16
Ch3 LO IN / Ch11 HI IN Pin 15
Ch4 LO IN / Ch12 HI IN Pin 14

Ch5 LO IN / Ch13 HI IN Pin 13
Ch6 LO IN / Ch14 HI IN Pin 12
Ch7 LO IN / Ch15 HI IN Pin 11
D/A 0 REF IN* Pin 10

D/A 0 OUT* Pin 9
VREF (-5)* Pin 8

POWER GND Pin 7

IP 1 / XTRIG Pin 6

IP 3 Pin 5

OP 1 Pin 4
OP 3 Pin 3

CTR 0 OUT Pin 2

+5 V PWR Pin 1

* Not connected in DAS-1400 Series

Pin 37 Ch0 HI IN
Pin 36 Ch1 HI IN
Pin 35 Ch2 HI IN

Pin 34 Ch3 HI IN
Pin 33 Ch4 HI IN
Pin 32 Ch5 HI IN
Pin 31 Ch6 HI IN

Pin 30 Ch7 HI IN
Pin 29 LL GND

Pin 28 LL GND
Pin 27 D/A 1 OUT*
Pin 26 D/A 1 REF IN*
Pin 25 IP 0 / TRIG 0 / XPCLK
Pin 24 IP 2 / CTR 0 GATE
Pin 23 OP 0
Pin 22 OP 2
Pin 21 CTR 0 CLOCK IN
Pin 20 CTR 2 OUT

Figure 4-2. Pin Assignments of the Main I/O Connector (J1)

When using an STC-37 to make connections to the bidirectional digital
I/O, first attach the board end of the PIO cable to the PIO cable connector
(J2) on the DAS-1600/1400 board, then install the 37-pin D-type
connector of the PIO cable in the connector panel next to the main I/O
connector (J1) of the DAS-1600/1400 Series board, and finally attach the
second STC-37 to the 37-pin D-type connector of the PIO cable. For more
information about making field connections, see “Connecting Analog
Input Signals” on page 4-23.

4-4 Cabling and Wiring

Attaching an STP-37

The screw terminals on the STP-37 screw terminal panel allow you to
connect field wiring to DAS-1600/1400 Series boards. The STP-37
contains the following components:

●

A 37-pin male connector for cabling to the main I/O connector of a
DAS-1600/1400 Series board.

●

Labeled screw terminals for connecting sensor outputs and test
equipment. These terminals accept wire sizes 12-22 AWG.

You attach an STP-37 screw terminal panel to the main I/O connector (J1)
on the DAS-1600/1400 Series board with a C-1800 or S-1800 cable. The
C-1800 is the unshielded version of the cable; the S-1800 is the shielded
version of the cable. Figure 4-3 shows how to attach an STP-37 to a
DAS-1400 Series board.

1

19

20

38

DAS-1400 Series board

J1

C-1800 / S-1800 cable

J1

STP-37

Figure 4-3. Attaching an STP-37 to the Main I/O Connector

The screw terminals are labeled 1 to 38 and correspond directly to the
functions of the main I/O connector. See Figure 4-2 for the pin
assignments of the main I/O connector (J1).

Attaching Screw Terminal Accessories 4-5

When using an STP-37 to make connections to the bidirectional digital
I/O, first attach the board end of the PIO cable to the PIO cable connector
(J2) on the DAS-1600/1400 Series board, then install the 37-pin D-type
connector of the PIO cable in the connector panel next to the main I/O
connector (J1) of the DAS-1600/1400 Series board, and finally attach the
STP-37 to the 37-pin D-type connector of the PIO cable. See Figure 4-8
for the pin assignments of the 37-pin D-type connector of the PIO cable.

Attaching an STA-16

The screw terminals on the STA-16 screw terminal accessory allow you to
connect field wiring to DAS-1600/1400 Series boards. The STA-16
contains the following components:

Two 37-pin male connectors. One for cabling to the main I/O

●

connector of a DAS-1600/1400 Series board and a second for
daisy-chaining additional accessories.

Labeled screw terminals for connecting sensor outputs and test

●

equipment. These terminals accept wire sizes 12-22 AWG.

●

A breadboard area for user-installed circuitry.

Attach an STA-16 screw terminal accessory to the main I/O connector
(J1) on the DAS-1600/1400 Series board with a C-1800 or S-1800 cable.
The C-1800 is the unshielded version of the cable; the S-1800 is the
shielded version of the cable. Figure 4-4 shows how to attach an STA-16
to a DAS-1400 Series board.

DAS-1400 Series board

J1

C-1800 / S-1800 cable

pin 1

pin 1

J1

J2

STA-16

Figure 4-4. Attaching an STA-16

4-6 Cabling and Wiring

J2J1

HI

CH 0

Figure 4-5 shows the screw terminal names on the STA-16.

12 HI

HILLGND

13 HI

0 LO /

8 HI

LL

GND

9 HI

CH 1HI1 LO /

HILLGND

CH 2

10 HI

2 LO /

LL

GND

11 HILLGND

CH 3HI3 LO /

CH 4HI4 LO /

CH 5

5 LO /

LL

GND

HI

CH 6

14 HILLGND

6 LO /

15 HILLGND

CH 7HI7 LO /

+5 V

OP 3

OP 2

OP 1

OP 0

GND

Attaching an STA-U

The screw terminals on the STA-U universal screw terminal accessory
allow you to connect field wiring to the DAS-1600 Series PIO cable
connector (J2). The STA-U contains the following components:

A 37-pin male connector for cabling to the PIO cable connector (J2)

●

on a DAS-1600 Series board.

●

Labeled screw terminals for connecting digital inputs and outputs.
These terminals accept wire sizes 12-22 AWG.

A breadboard area for user-installed circuitry.

●

First, attach the board end of the PIO cable to the PIO cable connector
(J2) on the DAS-1600/1400 board. Next, install the 37-pin D-type
connector of the PIO cable in the connector panel next to the main I/O
connector (J1) of the DAS-1600/1400 Series board. Finally, attach
connector J2 on the STA-U screw terminal accessory to the 37-pin D-type
connector of the PIO cable with a C-1800 or S-1800 cable. The C-1800 is
the unshielded version of the cable; the S-1800 is the shielded version of
the cable.

IP 3

IP 3

IP 3

IP 3

GND

OUT

CTR 2

OUT

CTR 0

GND

IN

CTR

1

USER

2

USER

Figure 4-5. STA-16 Terminal Names

0

LL

GND

D/A 0

OUT

D/A 0

VREF

-5 V

REF IN

REF IN

D/A 1

OUT

D/A 1

GND

Attaching Screw Terminal Accessories 4-7

Figure 4-6 shows how to attach an STA-U to a DAS-1600 Series board.

J2 PIO cable

DAS-1600 Series board

C-1800 / S-1800 cable

pin 1

J1

pin 1

Figure 4-6. Cabling and Connections for Attaching an STA-U

Figure 4-7 shows the screw terminal names on an STA-U. The screw
terminals map directly to the pins of the PIO cable connector (J2) shown
in Figure 4-8.

37

36

35

34

33

32

31

30

29

28

27

26

user breadboard connections

25

J2 J3

STA-U

J2J1

J3

1

2

6

534

7

8

9

10

11

12

13

14

15

16

17

18

1920212223

24

Figure 4-7. STA-U Terminal Names

4-8 Cabling and Wiring

Rear View

DIG.COM. Pin 19
+5 V Pin 18

DIG. COM. Pin 17
not connected Pin 16
DIG. COM. Pin 15
not connected Pin 14

DIG. COM. Pin 13
not connected Pin 12
DIG.COM. Pin 11
PB 0 Pin 10

PB 1 Pin 9
PB 2 Pin 8

PORT B

PB 3 Pin 7

PB 4 Pin 6
PB 5 Pin 5
PB 6 Pin 4
PB 7 Pin 3

not connected Pin 2

not connected Pin 1

Figure 4-8. Pin Assignments of PIO Cable Connector (J2)

Attaching Expansion Accessories

Pin 37 PA 0
Pin 36 PA 1
Pin 35 PA 2
Pin 34 PA 3
Pin 33 PA 4
Pin 32 PA 5
Pin 31 PA 6

Pin 30 PA 7
Pin 29 PC 0

Pin 28 PC 1
Pin 27 PC 2
Pin 26 PC 3
Pin 25 PC 4

Pin 24 PC 5

Pin 23 PC 6
Pin 22 PC 7
Pin 21 DIG. COM.

Pin 20 +5 V

PORT A

PORT CL

PORT CH

You can use the following expansion accessories to increase the number
of channels available and add signal conditioning to your application:

●

EXP-16
EXP-16/A

●

EXP-GP

●

●

EXP-1600

The following section describes how to attach these e xpansion accessories
to DAS-1600/1400 Series boards.

Attaching Expansion Accessories 4-9

Attaching an EXP-16 or EXP-16/A Expansion Accessory

Each expansion multiplexer/amplifier accessory provides up to 16 analog
input channels (labeled 0 to 15). Table 4-1 lists the terminal names used
on EXP-16 and EXP-16/A expansion accessories.

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

Terminal Name Signal

LL GND low-level ground
CHn HI positive input; where n indicates the channel number
CHn LO negative input; where n indicates the channel number

To connect an EXP-16 or EXP-16/A to a DAS-1600/1400 Series board,
you must first connect an STA-16 or STA-MB accessory, as shown in
Figure 4-9.

DAS-1600/1400

Series board

J1

C-1800

or

S-1800

STA-16

or

STA-MB

S-1600

EXP-16 or
EXP-16/A

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

Note:

The S-1600 cable must be used to connect the first EXP to the
DAS-1600/1400 Series board.

4-10 Cabling and Wiring

Refer to the EXP-16 and EXP-16/A expansion board documentation for
more information about these accessories and instructions for installing
the PG-408A option on the board.

Caution:

Do not attach an EXP-16 or EXP-16/A to the PIO cable

connector (J2) on the DAS-1600 Series board.

Attaching an EXP-GP Expansion Accessory

Each EXP-GP expansion multiplexer/signal conditioner board provides
up to eight analog input channels (labeled 0 to 7). Table 4-2 lists the
terminal names used on each EXP-GP channel.

Table 4-2. EXP-GP Terminal Names

Terminal Name Signal

+IEXC positive current excitation
+SENSE positive input

P

−

−

IEXC

−

SENSE

+P positive voltage excitation

negative voltage excitation
negative current excitation
negative input

To connect an EXP-GP to a DAS-1600/1400 Series board, attach one end
of an S-1600 cable to the DAS-1600/1400 Series main I/O connector (J1)
and the other end of the cable to the J1 connector on the EXP-GP.
Figure 4-10 illustrates the connection of an EXP-GP to a DAS-1400
Series board.

Attaching Expansion Accessories 4-11

DAS-1600/1400

Series board

J1

C-1800

or

S-1800

S-1600

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

Refer to the EXP-GP expansion board documentation for more
information about this expansion accessory.

Attaching an EXP-1600 Accessory

Before connecting an EXP-1600 to a DAS-1600/1400 Series board,
configure the channels of the DAS board as single-ended inputs. An
EXP-1600 connects directly to the main I/O connector of a
DAS-1600/1400 Series board through a CAB-3740 cable, as shown in
Figure 4-11.

FWA-EXP Input

J1

FWA-37U Input

P4

STA-16

or

STA-MB

EXP-GP

DAS-1600/1400 Series Board

P2

P3

CAB-3740

Cable

Figure 4-11. Attaching an EXP-1600 to a DAS-1600/1400 Series Board

4-12 Cabling and Wiring

Attaching Multiple Expansion Accessories

You can cascade up to eight EXP-16, EXP-16/A, and/or EXP-GP
expansion accessories to provide up to 128 analog input channels, or you
can attach up to 16 EXP-1600 expansion accessories to provide up to 256
analog input channels.

Figure 4-12 shows how to attach multiple EXP-16, EXP-16/A, and
EXP-GP accessories to a DAS-1600/1400 Series board.

Notes:

In a mix of EXP-16, EXP-16/A, and EXP-GP accessories,
the EXP-16 and EXP-16/A accessories must be placed ahead of the
EXP-GP accessories.

All multiple EXP-16 and EXP-16/A accessories attached to a
DAS-1600/1400 Series board, as shown in Figure 4-12, must contain a
PG408A accessory.

DAS-1600/1400

Series board

Figure 4-12. Attaching Multiple EXP-16, EXP-16/A, and /or EXP-GP Accessories

J1

C-1800

or

S-1800

STA-16

or

STA-MB

S-1600

C-1800 or
S-1800

EXP-16 or
EXP-16/A
with PG408

C-1800 or
S-1800

EXP-16 or
EXP-16/A
with PG408

EXP-GP

Notes:

Each EXP-16, EXP-16/A, or EXP-GP expansion accessory is
associated with an analog input channel on a DAS-1600/1400 Series
board. You specify the associated DAS-1600/1400 input channel by
setting a jumper on each expansion accessory. Use a unique jumper
setting for each expansion accessory you are using. Refer to your
expansion board documentation for more information.

Attaching Expansion Accessories 4-13

Figure 4-13 shows how to attach multiple EXP-1600 expansion
accessories to a DAS-1600/1400 Series board.

CAB-40/1

Cable

P3

FWA-37U Input

P2

FWA-EXP Input

CAB-40/1

Cable

FWA-37U Input

FWA-EXP Input

Figure 4-13. Attaching Multiple EXP-1600 Accessories

Attaching SSIO-24 and ERB-24 Accessories

Figure 4-14 shows how to attach an SSIO-24 or ERB-24 accessory to a
DAS-1600/1400 Series board. Refer to SSIO-24 and ERB-24
documentation for more information.

P3

P2

CAB-3740 cable to

DAS-1600/1400

Series board

DAS-1600/1400

Series board

J2

PIO

Cable

C-1800 or
S-1800 Cable

SSIO-24 or
ERB-24

Figure 4-14. Attaching an SSIO-24 or ERB-24 Accessory

4-14 Cabling and Wiring

Attaching an ISO-4 Accessory

The ISO-4 is a high speed, universal expansion interface and isolation
amplifier. The ISO-4 contains four fully isolated, differentially measured
input channels supporting seven jumper-selectable gains of 1, 2, 10, 50,
100, 200, and 1000 on a per channel basis. You can further customize
gains to meet your specific requirements with user-installable resistors.

Refer to the
features and applications.

To connect an ISO-4 accessory to a DAS-1600/1400 Series board, attach
one end of an S-1600 cable to the DAS-1600/1400 Series main I/O
connector (J1) and the other end of the cable to the J1 connector on the
ISO-4 accessory. Figure 4-15 illustrates the connection of an ISO-4
accessory to a DAS-1400 Series board.

DAS-1400 Series board

Figure 4-15. Attaching an ISO-4 Accessory

ISO-4 User’s Guide

S-1600 Cable

J1

for more information about ISO-4

CJC channel

J2

J1

output channel

ISO-4

Attaching SSH Accessories

Simultaneous sample-and-hold (SSH) accessories allow you to acquire
analog input data from multiple inputs simultaneously. SSH accessories
available for DAS-1600/1400 Series boards are the SSH-4/A and
the SSH-8.

Attaching an ISO-4 Accessory 4-15

The following subsections describe how to attach SSH-4/A and SSH-8
boards to DAS-1600/1400 Series boards.

Attaching an SSH-4/A

The SSH-4/A is a 4-channel simultaneous sample-and-hold board whose
functions and capabilities are described in the
SSH-4/A serves as a front-end analog interface for DAS-1600/1400
Series boards.

Figure 4-16 shows how to attach the SSH-4/A to a DAS-1400
Series board through a C-1800 cable.

SSH-4/A User Guide

. The

J1

DAS-1400 Series board

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

Additional SSH-4/A accessories are attached in daisy-chain fashion with
CACC-2000 cable.

Attaching an SSH-8

The SSH-8 is a high performance 8-channel simultaneous
sample-and-hold board whose functions and capabilities are described in
the

SSH-8 User’s Guide

for DAS-1600/1400 Series boards.

C-1800 Cable

J4

J2

J1

SSH-4/A

. The SSH-8 serves as a front-end analog interface

Analog Inputs

4-16 Cabling and Wiring

Figure 4-17 and Figure 4-18 show how to attach SSH-8 boards to a
DAS-1600/1400 Series board.

DAS-1600/1400

Series board

S-1800 or

C-1800

SSH-8

Optional +5 V power and ground.

Analog Inputs plus optional
external pacer clock (EXT
CLK IN)

STC-SSH-8 or user-supplied cable

DAS-1600/1400

Series board

SSH-8-DC

S-1800 or

C-1800

SSH-8

SSH-8

MANDATORY +5 V
power and ground

STC-SSH-8 or user-supplied
cable for analog Inputs plus
optional external pacer clock
(EXT CLK IN)

STC-SSH-8 or user-supplied
cable for analog Inputs

Figure 4-17. Attaching SSH-8 Accessories

When you use the cabling shown in Figure 4-17, observe the
following rules:

For best results, the length of any cable should not exceed 30 inches.

●

The length of two cables should not exceed 36 inches. Total length for
all cables in series should not exceed 50 inches. Total cable length
does not include analog input cables.

●

You can use the STC-SSH-8 screw terminal interface instead of
a cable.

●

Use eight feet maximum of #18 AWG wire (or heavier) for optional
external power and ground.

When daisy-chaining two SSH-8 accessories to a DAS-1600/1400

●

Series board, put the first in master mode and the second in
slave mode.

●

Optional channel jumpers are 0 to 7 for the first SSH-8 accessory and
8 to 15 for the second.

Attaching SSH Accessories 4-17

● Where the S-1800 cable is called out, other options include C-1800,

S-1801, and C-1801. Crosstalk, shielding, and cost trade-offs are
factors in the selection of these options.

DAS-1600/1400

Series board

S-1800 or

C-1800

DAS-1600/1400

Series board

SSH-8-DC

S-1800 or
C-1800

Digital I/O

S-1800 or

C-1800

SSH-8

S-1800 or

C-1800

STA-16 accessory

SSH-8

SSH-8

STA-16 accessory

Optional +5 V power and
ground

Analog Inputs plus optional
external pacer clock (EXT
CLK IN)

STC-SSH-8 or user-supplied cable

MANDATORY
+5 V power and ground

STC-SSH-8 or user-supplied
cable for analog Inputs plus
optional external pacer clock
(EXT CLK IN)

STC-SSH-8 or user-supplied
cable for analog Inputs

Note that only one EXT CLK IN
source is usable

Digital I/O

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

Caution: Do not connect analog inputs to STA-16 pins that are driven by

SSH-8 outputs.

Refer to the SSH-8 User’s Guide for more information.

4-18 Cabling and Wiring

Attaching an MB Series Backplane

MB Series modules are ideally suited to applications where monitoring
and control of temperature, pressure, flow, and other analog signals are
required. Figure 4-19 shows a block diagram of a typical MB Series
measurement and control application.

mV , V, Thermocouple,

RTD, Strain Gauge,
4–20 mA / 0–20 mA

Sensors,

Monitors

Process or
Equipment

Controls

(Valves, etc.)

Figure 4-19. Typical Measurement and Control Application

Input

Module

MB SERIES

MODULES

Output Module

4–20 mA / 0–20 mA

0 to +5 V / ±5 V

A/D

Analog I/O

D/A

0 to +5 V / ±5 V

Computer

Table 4-3 provides a brief summary the backplanes available for use with
MB Series modules.

Attaching an MB Series Backplane 4-19

Table 4-3. MB Series Backplanes

Model Description

MB01 Holds up to 16 modules and mounts in a 19-inch equipment rack.

Provides direct channel-to-channel connection to a
DAS-1600/1400 Series board.

MB02 Holds up to 16 modules and mounts in a 19-inch equipment rack.

Up to four MB02s can be multiplexed together, providing a total
of 64 channels. This makes it suitable for larger systems.

MB05 Functionally equivalent to half an MB01, the MB05 backplane

accepts eight modules. Provides direct channel-to-channel
connection to a DAS-1600/1400 Series board.

STA-MB Holds up to four modules and provides general-purpose screw

terminal connections for all other signals on the DAS1600/1400
Series board.

Attaching an MB01/05 Backplane

Use the C16-MB1 cable to connect a DAS-1600/1400 Series board to an
MB01/05 backplane. This cable connects MB01/05 channels 0 through
15 to analog input channels 0 through 15 on the DAS-1600/1400 Series
board. Refer to Figure 4-20 for a cabling diagram.

DAS-1600

Series

C16-MB1

MB01/05

Use connector P1 or P2
(identical pinouts)

Figure 4-20. Attaching an MB01/05 Backplane

4-20 Cabling and Wiring

Note: The channel connections are single-ended. Make sure that

the DAS-1600/1400 Series board is set for 16-channel,
single-ended operation.

Attaching an MB02 Backplane

Figure 4-21 shows how to connect a DAS-1600/1400 Series board to up
to four MB02 backplanes. The STA-SCM16 interface connects one
MB02 board to one analog input channel of the DAS-1600/1400 Series
board. One C-2600 cable connects each MB02 to the STA-SCM16, and
the C-1800 cable connects the STA-SCM16 to the DAS-1600/1400
Series board.

DAS-1600/1400

Series board

C-1800

MB02

MB02

STA-SCM16

MB02

C-2600 (four
cables)

MB02

Figure 4-21. Attaching Multiple MB02 Backplanes

Figure 4-22 shows how the STA-SCM16 connects DAS-1600/1400 Series
boards with MB02 backplanes.

Attaching an MB Series Backplane 4-21

A/D CH 0 IN

D/A CH 0 OUT

A/D CH 1 IN

D/A CH 1 OUT

A/D CH 2 IN
A/D CH 3 IN

MB02 Backplane Interfaces

Vread

Vwrite

Vread

Vwrite

Vread

Vread

DAS-1600 Series board

Figure 4-22. MB02 I/O Connections

The four digital output lines on the DAS-1600/1400 Series boards select
one of the 16 MB02 channels. For example, if you set the digital output
lines to 1000 (8 decimal), MB02 channel 8 is selected on all four
backplanes. Analog input channels 0 to 3 on the DAS-1600/1400 Series
board map directly to the connectors labeled 0 to 3 on the STA-SCM16.
In this arrangement, the channel connections are single-ended. Make sure
that the DAS-1600/1400 Series board is set for single-ended, 16-channel
operation. Refer to the MB Series User’s Guide for more information.

Attaching an STA-MB

The screw terminals on the STA-MB screw-terminal accessory accept
field wiring to up to four MB Series modules whose outputs are brought
through an C-1800/S-1800 cable to the main I/O connector of a
DAS-1600/1400 Series board.

0123

Backplane Connectors

STA-SCM16

4-22 Cabling and Wiring

The STA-MB contains the following components:

● Two 37-pin male connectors. One for cabling to the main I/O

● Labeled screw terminals for connecting sensor outputs and test

● Mounts for up to four MB Series modules.

Attach an STA-MB screw terminal accessory to the main I/O connector
(J1) on the DAS-1600/1400 Series board with a C-1800 or S-1800 cable.
The C-1800 is the unshielded version of the cable; the S-1800 is the
shielded version of the cable. Figure 4-23 shows how to attach an
STA-MB to a DAS-1400 Series board.

DAS-1400 Series board

J2

connector of a DAS-1600/1400 Series board and a second for
cascading additional accessories.

equipment. These terminals accept wire sizes 12-22 AWG.

C-1800 / S-1800 cable

J1

J2 J3

pin 1

pin 1

STA-MB

Figure 4-23. Cabling and Connections for Attaching an STA-MB

Connecting Analog Input Signals

This section shows circuits for wiring signal sources to input channels of
DAS-1600/1400 Series boards. While the circuit diagrams show direct
connections to channel input pins of the main I/O connector, you must
make actual connections through corresponding inputs of an accessory,
such as a screw terminal panel.

Connecting Analog Input Signals 4-23

The circuit diagrams represent a single signal source wired to a single
channel (channel n). In reality , you can wire eight separate signal sources
to eight differential inputs or 16 separate signal sources to 16
single-ended inputs.

If you expect to use a DAS-1601 or DAS-1401 board at high gain, read
the precautionary information in “Precautions for Operating at High
Gains” on page 4-28. Other considerations for I/O connections are offered
under “Additional Precautions” on page 4-29.

Connecting a Signal to a Single-Ended Analog Input

Figure 4-24 shows the connections between a signal source and a
channel of a DAS-1600/1400 Series board configured for single-ended
input mode.

DAS-1600/1400
Series board

CHANNEL n

HIGH

LL GND

+

−

Signal
Source

Figure 4-24. Connections for Wiring a Signal Source to a

DAS-1600/1400 Series Board Configured for Single-Ended Inputs

The main I/O connector (J1) contains the following two
ground connections:

● POWER GND is the noisy or "dirty" ground that carries all digital

signal and power supply currents.

● LL GND or low level ground is the ground reference for all analog

input functions and it only carries signal currents that are less than a
few mA.

Contact resistance and cable resistance can make difference voltage of
many millivolts between the two grounds although they are connected to
each other.

4-24 Cabling and Wiring

Note: When you wire signals to the analog input channels, you are

advised to wire all unused channels to LL GND. This action prevents the
input amplifiers from saturating, and it ensures the accuracy of your data.

Connecting a Signal to a Differential Analog Input

Figure 4-25 shows three methods of wiring a signal source to a channel of
a DAS-1600/1400 Series board configured for differential input mode.

DAS-1600/1400
Series board

DAS-1600/1400
Series board

DAS-1600/1400
Series board

Channel n High
Channel n Low

LL GND

Where Rs > 100 ohms Rb
= 2000 R

Channel n High
Channel n Low

LL GND

Where Rs < 100 ohms Rb
> 1000 R

Channel n Low

LL GND

R

s

R

s

R

a

R

x

+

Signal

R

s

R

b

b

b

R

a

arm

R

a

Source

−

+

Signal

R

s

Source

−

null

+

−

DC

supply

bridge

Channel n High

Figure 4-25. Three Methods of Wiring Differential Inputs

Connecting Analog Input Signals 4-25

The upper two circuits of the diagram require the addition of resistors to
provide a bias-current return. You can determine the value of the bias
return resistors (R

) from the value of the source resistance (Rs), using the

b

following relationships:

● When R

is greater than 100 Ω, use the connections in the upper

s

circuit. The resistance of each of the two bias return resistors must
equal 2000 R

● When R

.

s

is less than 100 Ω, use the connections in the middle circuit.

s

The resistance of the bias return resistor must be greater than 1000 R

In the lower circuit, bias current return is inherently provided by the
source. The circuit requires no bias resistors.

Avoiding a Ground Loop Problem

Very often, the signal-source ground and the DAS-1600/1400 Series
board ground are not at the same voltage level because of the distances
between equipment wiring and the building wiring. This difference is
referred to as a common-mode voltage (Vcm) because it is normally
common to both sides of a differential input (it appears between each side
and ground).

Using a differential input lets you avoid a ground loop problem. Since a
differential input responds only to the difference in the signals at its high
and low inputs, its common-mode voltages cancel out and leave only the
signal. However, if your input connections contain a ground loop, your
input could see incorrect data readings resulting from the sum of the
signal-source and common-mode voltages. Figure 4-26 shows the proper
way to connect a differential input while Figure 4-27 illustrates the effect
of a ground loop on a differential channel converted to a single-ended
channel by the installation of a wire jumper between Channel n Low and
LL GND on the DAS board side of the cable. Figure 4-27 also illustrates
the ground loop problem for a channel already configured in the
configuration utility as single-ended.

.

s

4-26 Cabling and Wiring

DAS-1600/1400
Series board

CHANNEL n HIGH
CHANNEL n LOW

V

LL GND

V

g2

cm

R

wire

+

E

s

−

Signal

Signal
Source

Source

Do not connect n LOW to LL
GND at the computer

V

cm =

g1 -

g2

Ground

V

g1

V

V

Figure 4-26. A Differential Input Connection that Avoids a Ground Loop Problem

DAS-1600/1400
Series board

CHANNEL n HIGH

CHANNEL n LOW

LL GND

V

g2

V

cm =

V

cm

R

wire

V

V

g2

g1 -

+

E

s

−

Signal
Source
Ground

V

g1

Signal
Source

Figure 4-27. Differential or Single-Ended Input Connection that Introduces a Ground

Loop Problem

Avoiding a Ground Loop Problem 4-27

Connecting Analog Output Signals

DAS-1600 Series boards include two DACs. Refer to the specifications in
Appendix A for voltages, current limits, and other loading information.
Make your connections to the DAC output terminals through
corresponding screw terminals of your accessory. Table 4-4 lists the input
and output connections of the DACs in the DAS-1600 Series boards.

Table 4-4. DAC Input and Output Connections

Signal Main I/O Connector (J1)

D/A 0 User Reference Voltage In pin 10
D/A 1 User Reference Voltage In pin 26
D/A 0 Out pin 9
D/A 1 Out pin 27

Precautions for Operating at High Gains

Operating DAS-1601 or D AS-1401 boards at gains of 100 or 500 can lead
to problems if your application is unable to cope with noise. At a gain of
500, with a bipolar input range of
output corresponds to 10

µV of analog input. Thus, with the high speed

−10.0 V to + 10.0 V, each bit of A/D

and bandwidth of this board, analog noise and performance degradation
come easily unless you take precautions to avoid them. The following
collection of ideas and suggestions is aimed at avoiding these problems:

● Operate DAS-1601 and DAS-1401 boards in 8-channel differential

mode. Using the board in 16-channel, single-ended mode at high
gains introduces enough ground-loop noise to produce large
fluctuations in readings.

● Minimize noise from crosstalk and induced-voltage pickup in the flat

cables and screw terminal accessories by using shielded cable.
Connect the shield to LL GND and the inner conductors to Channel
LO and HI. Channel LO and LL GND should have a DC return (or
connection) at some point; this return should be as close to the signal

4-28 Cabling and Wiring

source as possible. Induced noise from RF and magnetic fields can
easily exceed tens of microvolts, even on one- or two-foot cables;
shielded cable eliminates this problem.

● Avoid bi-metallic junctions in the input circuitry. For example, the

kovar leads, used on reed relays, typically have a thermal emf to
copper of 40

µV/˚C. Thermals can introduce strange random

variations caused by air currents and so on.

● Consider filtering. This approach can use hardware (resistors,

capacitors, and so on) but is often accomplished more easily with
software. Instead of reading the channel once, read it 10 or more
times in quick succession and average the readings. If the noise is
random and gaussian, it will be reduced by the square-root of the
number of readings.

Additional Precautions

Do not mix your data acquisition inputs with the AC line, or you risk
damaging the computer. Data acquisition systems pro vide access to inputs
of the computer. An inadvertent short between data and power lines can
cause extensive and costly damage to your computer. The manufacturer
can accept no liability for this type of accident. To prevent this problem,
use the following precautions:

● Avoid direct connections to the AC line.

● Make sure all connections are tight and sound so that signal wires are

not likely to come loose and short to high voltages.

● Use isolation amplifiers and transformers where necessary.

Additional Precautions 4-29

5

DriverLINX Analog I/O Panel

The DriverLINX Analog I/O Panel is an application that demonstrates
analog input/output using DriverLINX. With the Analog I/O Panel
you can:

Analyze analog signals using the simulated

●

two-channel Oscilloscope.
Measure analog voltages using the simulated Digital Volt Meter.

●

Generate Sine, Square and Triangle waves using the SST

●

Signal Generator.

●

Output DC Level voltages using the Level Control.

The Analog I/O Panel is useful for:

●

Testing the DAS-1600/1400 DriverLINX installation
and configuration.

Verifying signal inputs to your DAS-1600/1400 board.

●

●

Sending test signals to external devices.

To access this DriverLINX Analog I/O Panel:

1. Start the Analog I/O Panel with the “AIO Panel item on the

Windows™ start menu. Then perform the following steps:

2. Click the [...] button in the Driver Selection section.

3. Select the driver for your board using the

4. Click

5. Select the Logical Device you want to operate by dragging the pointer

OK.

in the Device Selection section. The Analog I/O Panel displays the
Scope, Meter, SST, and Level control tabs, depending on the
capabilities of your DAS-1600/1400 board.

Open DriverLINX

dialog.

5-1

6. The Scope uses two analog input channels, referred to as ChA and

ChB. Drag the channel selectors in the AI Channel Mapping section
to map them to different channel numbers.

7. The SST Signal Generator uses two analog output channels, referred

to as ChA and ChB. Drag the channel selectors in the AO Channel
Mapping section to map them to different channel numbers.

You can now select the Scope, Meter, SST and Level Control tabs to
operate your DAS-1600/1400 board.

Test Panel Application

Depending upon the DriverLINX drivers you have installed on your
system, you will have one or more of the following example applications:

Single-Value AI

●

●

Single-Value AO
PIO Panel

●

CTM Test Bench

●

for analog input

for analog output

for digital input and output

for counter/timer applications.

To access this DriverLINX Test Panel, select Test Panel with the “Test
Panel” item on the Windows start menu.

5-2 DriverLINX Analog I/O Panel

Your DAS-1600/1400 Series board is initially calibrated at the factory.
You are advised to check the calibration of a board every six months and
to calibrate again when necessary. This chapter provides the information
you need to calibrate a DAS-1600/1400 Series board.

Equipment Requirements

The equipment requirements for calibrating a DAS-1600/1400 Series
board are as follows:

A digital voltmeter accurate to a minimum of 5 1/2 digits

●

●

An adjustable ±10 V power source

6

Calibration

Potentiometers and Test Points

Figure 3-1 on page 3-7 and Figure 3-2 on page 3-7 show the locations of
the potentiometers and test points that are used during the calibration of a
DAS-1600 Series or DAS-1400 Series board.

The calibration utility, described in the next section, directs you to
components and explains what to do with them during the
calibration process.

Equipment Requirements 6-1

Calibration Utility

DriverLINX Calibration Utility will guide you through the
calibration procedure. Before calibration, specify the following
parameters in the setup panel to get the correct instructions:

●

Logical Device—

●

Accessory—

calibration stimulus

●

Shorted channel—

Board’s device number, model and address

Connection method used to connect the board to the

Input channel to be “shorted” high to low

Voltage Channel—

●

calibration voltage levels

Calibration range—

●

Input channel to use to apply the various

Input range to be calibrated

6-2 Calibration

If your DAS-1600/1400 Series board is not operating properly, use the
information in this chapter to isolate the problem. If the problem appears
serious enough to warrant technical support, refer to “Technical Support”
on page 7-6 for information on how to obtain technical support.

Problem Isolation

If you encounter a problem with a DAS-1600/1400 Series board, use the
instructions in this section to isolate the cause of the problem before
calling Keithley for technical support.

7

Troubleshooting

Using the DriverLINX Event Viewer

The DriverLINX Event Viewer displays the W indo ws™ system ev ent log.
Applications and hardware drivers make entries in the system e v ent log to
assist in predicting and troubleshooting hardware and software problems.

DriverLINX uses the event log to report problems during driver loading
or unexpected system errors. The event log can assist in troubleshooting
resource conflicts and DriverLINX configuration errors. If you are having
trouble configuring or initializing a Logical Device, check the event log
for information from the DriverLINX driver.

Using the DriverLINX Event Viewer, you can view, save and e-mail
DriverLINX event log entries under Windows 95/98 or Windows NT.
DriverLINX event log entries can help you or technical support
troubleshoot data-acquisition hardware and software problems.

Problem Isolation 7-1

Device initialization error messages

During device initialization, DriverLINX performs a thorough test of all
possible subsystems on DAS-1600/1400 Series boards as well as the
computer interface. If DriverLINX detects any problems or unexpected
responses, it reports an error message to help isolate the problem. The
device initialization error messages fall into three basic categories:

“Device not found”—

●

Board address does not match hardware
setting or conflicts with another board. Verify the board’s address
settings. Also, don’t confuse hexadecimal with decimal addresses in
the DriverLINX

“Invalid IRQ level”

●

Device Configure

or

“Invalid DMA level”—

dialog box.

not match hardware setting, conflicts with another board’ s IRQ/DMA
levels, or is dedicated to the computer’ s internal functions (COM port,
disk drive controller, network adapter, etc.)

●

"Hardware does not match configuration”—

mode/range switch or jumper setting does not match selection(s)
made in the DriverLINX

Device Configuration

Identifying Symptoms and Possible Causes

Use the troubleshooting information in Table 7-1 to try to isolate the
problem. Table 7-1 lists general symptoms and possible solutions for
problems with DAS-1600/1400 Series boards.

Selected level does

Operating

dialog box.

7-2 Troubleshooting

Table 7-1. Troubleshooting Information

Symptom Possible Cause Possible Solution

Board does not
respond

Intermittent
operation

Base address is incorrect. Make sure the base address switch on

the board is set correctly and that your
program references the same base
address. If the base address is set
correctly, make sure no other computer
device is using any of the I/O locations
beginning at the specified base address.
If necessary, reconfigure the base
address. Refer to page 3-9 for
instructions on setting the base address.

The interrupt level is incorrect. Make sure no other computer device is

using the interrupt level specified in your
program. If necessary, reset the
interrupt level.

The board is incorrectly aligned
in the accessory slot.

The board is damaged. Contact Keithley for technical support;

The most common cause of this
problem is that the I/O bus speed
is in excess of 8 MHz.

Check installation.

see page 7-6.
Reduce I/O bus speed to a maximum of

8 MHz (to change the I/O bus speed, run
BIOS setup). See the documentation for
your computer for instructions on
running BIOS setup.

Vibrations or loose
connections exist.

The board is overheating. Check environmental and ambient

Electrical noise exists. Provide better shielding or

Bus cycles require wait state. Enable wait states on the

Problem Isolation 7-3

Cushion source of vibration and
tighten connections.

temperature. See the documentation for
your computer.

reroute wiring.

DAS-1600/1400 Series board.

Table 7-1. Troubleshooting Information (cont.)

Symptom Possible Cause Possible Solution

Data appears to
be invalid

Computer does
not boot

The most common cause of this
problem is that the I/O bus speed
is in excess of 8 MHz.

An open connection exists. Check wiring to screw terminal.
Another device is using the

specified base address.

Board not seated properly. Check that the board is

The base address setting of the

DAS-1600/1400 Series

conflicts with that of
another device.

The power supply of the host
computer is too small to handle
all the devices installed in
your system.

board

Reduce I/O bus speed to a maximum of
8 MHz (to change the I/O bus speed, run
BIOS setup). See the documentation for
your computer for instructions on
running BIOS setup.

Reconfigure the base address of the

DAS-1600/1400 Series

page 3-9 for more information. Check
the I/O assignments of other system
devices and reconfigure, if necessary.

properly installed.
Verify that the base address setting

of your DAS-1600/1400 Series board
is unique. Refer topage 3-9 for
instructions on setting the base address.

Check the needs of all system devices
and obtain a larger power supply
if necessary.

board; refer to

If your board is not operating properly after using the information in
Table 7-1, continue with the next two sections to further isolate
the problem.

7-4 Troubleshooting

Testing the Board and Host Computer

To isolate the problem to the DAS-1600/1400 Series board or to the host
computer, use the following steps:

1. Turn the power to the host computer OFF, and remove power
connections to the computer.

Caution:

your board and/or computer.

2. While keeping connections to accessories intact, unplug the accessory
connector(s) or cable(s) from the DAS-1600/1400 Series board(s).

3. Remove the DAS-1600/1400 Series board(s) from the computer and
visually check for damage. If a board is obviously damaged, refer to
“Technical Support” on page 7-6 for information on returning
the board.

4. With the DAS-1600/1400 Series board(s) out of the computer, check
the computer for proper operation. Power up the computer and
perform any necessary diagnostics.

At this point, if you have another DAS-1600/1400 Series board that you
know is functional, you can test the slot and I/O connections using the
instructions in the next section. If you do not have another board, refer to
page 7-6 for instructions on calling Keithley for technical support.

Removing a board with the power ON can cause damage to

Testing the Accessory Slot and I/O Connections

When you are sure that the computer is operating properly, test the
computer accessory slot and I/O connections using another
DAS-1600/1400 Series board that you know is functional. To test the
computer accessory slot and the I/O connections, follow these steps:

1. Remove computer power again, and install a DAS-1600/1400 Series
board that you know is functional. Do not make any I/O connections.

Problem Isolation 7-5

2. Turn computer power ON and check operation with the functional
board in place. This test checks the computer accessory slot. If you
were using more than one DAS-1600/1400 Series board when the
problem occurred, use the functional board to test the other slot(s) as
well.

3. If the accessory slots are functional, use the functional board to check
the I/O connections. Reconnect and check the operation of the I/O
connections, one at a time.

4. If operation fails for an I/O connection, check the individual inputs
one at a time for shorts and opens.

5. If operation remains normal to this point, the problem is in the
DAS-1600/1400 Series board(s) originally in the computer. If you
were using more than one board, try each board one at a time in the
computer to determine which is faulty.

6. If you cannot isolate the problem, refer to the next section for
instructions on obtaining assistance.

Technical Support

Before returning any equipment for repair, call Keithley for technical
support at:

1-888-KEITHLEY
Monday - Friday, 8:00 A.M.. - 6:00 P.M., Eastern Time

An applications engineer will help you diagnose and resolve your
problem over the telephone. Please make sure that you hav e the follo wing
information available before you call:

DAS-1600/1400 Series Model
board configuration

7-6 Troubleshooting

Serial Number
Revision Code
Base address setting
Interrupt level setting
Number of channels
Input (S.E. or Diff.)
Mode (uni. or bip.)
DMA chan(s)

Number SSH-8 boards
Number EXP boards

Computer Manufacturer

CPU type
Clock speed (MHz)
KB of RAM
Video system
BIOS type

Operating system Windows version

Windows mode

Software package Name

Serial Number
Version
Invoice/Order Number

Compiler (if applicable) Language

Manufacturer
Version

Accessories Type

Type
Type
Type
Type
Type
Type
Type
Type

If a telephone resolution is not possible, the applications engineer will
issue you a Return Material Authorization (RMA) number and ask you to
return the equipment. Include the RMA number with any documentation
regarding the equipment.

When returning equipment for repair, include the following information:

Your name, address, and telephone number.

●

●

The invoice or order number and date of equipment purchase.

●

A description of the problem or its symptoms.
The RMA number on the

●

Technical Support 7-7

outside

of the package.

Repackage the equipment, using the original anti-static wrapping, if
possible, and handle it with ground protection. Ship the equipment to:

ATTN.: RMA# _______
Repair Department
Keithley Instruments, Inc.
31300 Bainbridge Road
Cleveland, Ohio 44139

Telephone 1-888-KEITHLEY
FAX [phone]

Note:

If you are submitting your equipment for repair under warranty,

you must include the invoice number and date of purchase.

To enable Keithley to respond as quickly as possible, you must include
the RMA number on the outside of the package.

7-8Troubleshooting

Specifications

The following tables list specifications for the DAS-1600/1400
Series boards.

Table A-1. Analog Input Specifications

Feature DAS-1601/1401 Boards DAS-1602/1402 Boards

Number of channels Switch-configurable as eight differential or 16 single-ended
Input mode Switch-configurable as unipolar or bipolar
Resolution 12-bits (1 part in 4096 or 244 ppm)

A

Gain (range) 1 (0.0 to +10.0 V for unipolar

1 (±10.0 V for bipolar)
10 (0.0 to +1.0 V for unipolar)

10 (±1.0 V for bipolar)
100 (0 to +100 mV for unipolar)

100 (±100 mV for bipolar)
500 (0 to +20 mV for unipolar)

500 (±20 mV for bipolar)

Gain (settling time) 1 (10 µs)

10 (10 µs)
100 (14 µs)
500 (34 µs)

Throughput

1

100 kHz for gains of 1 to 10
70 kHz for a gain of 100
30 kHz for a gain of 500

1 (0.0 to +10 V for unipolar)
1 (±10 V for bipolar)

2 (0.0 to +5.0 V for unipolar)
2 (±5.0 V for bipolar)

4 (0.0 to +2.5 V for unipolar)
4 (±2.5 V for bipolar)

8 (0.0 to 1.25 V for unipolar)
8 (±1.25 V for bipolar)

1 (10 µs)
2 (10 µs)
4 (10 µs)
8 (10 µs)

100 kHz for all gains

A-1

Table A-1. Analog Input Specifications (cont.)

Feature DAS-1601/1401 Boards DAS-1602/1402 Boards

Absolute accuracy Typical:

0.01% of reading ±1 LSB for all ranges
Maximum error:

For gain < 500: 0.02% of reading ±1 LSB maximum @ 25˚C
For gain = 500: 0.03% of reading ±1 LSB maximum @ 25˚C

Temperature coefficient of
accuracy (includes ADC)

Dynamic parameters Acquisition time: 1.4 µs

Non-linearity ±1 LSB
Input impedance Greater than 25 megohms
Input current 250 nA maximum (125nA typ.) @ 25˚ C
Input bias current ±40 nA maximum @ 25˚ C

Input overvoltage ±35.0 V continuous powered
Minimum common mode

rejection ratio

Gain:

• ±50 ppm/ ˚C for gains of 1,2,4,8, and 10

• ±55 ppm/ ˚C for a gain of 100

• ±50 ppm/ ˚C for a gain of 500
Offset:

• Bipolar: 10 µV/ ˚C ±10 ppm/˚ C

• Unipolar: ±10 µV/ ˚C ±5 ppm/˚ C

Aperture delay: 20.0 ns
Aperture uncertainty: 300 ps rms
Conversion time: 8.0 µs maximum 7.5 µs typical

±60 nA maximum over operating range

74 dB for gain = 1 74 dB for gain = 1
90 dB for gain = 10 80 dB for gain = 2
100 dB for gain = 100 80 dB for gain = 4
100 dB for gain = 500 86 dB for gain = 8

A-2 Specifications

Table A-1. Analog Input Specifications (cont.)

Feature DAS-1601/1401 Boards DAS-1602/1402 Boards

2

Noise

Bipolar electrical noise (in
counts)

• Gain = 1: p-p = 1; rms = 0.1

• Gain = 10: p-p = 1; rms = 0.1

• Gain = 100: p-p = 2; rms = 0.2

• Gain = 500: p-p = 3; rms = 0.5

Bipolar electrical noise (in
counts)

• Gain = 1: p-p = 1; rms = 0.1

• Gain = 2: p-p = 1; rms = 0.1

• Gain = 4: p-p = 1; rms = 0.1

• Gain = 8: p-p = 1; rms = 0.1

Unipolar electrical noise (in
counts):

• Gain = 1: p-p = 1; rms = 0.1

• Gain = 10: p-p = 1; rms = 0.1

• Gain = 100: p-p = 2; rms = 0.2

• Gain = 500: p-p = 3; rms = 0.5

Unipolar electrical noise (in
counts):

• Gain = 1: p-p = 1; rms = 0.1

• Gain = 2: p-p = 1; rms = 0.1

• Gain = 4: p-p = 1; rms = 0.1

• Gain = 8: p-p = 1; rms = 0.1

DMA channels 1 and 3
Interrupt levels 2, 3, 4, 5, 6, and 7
Minimum external pacer

10 ns

clock pulse width
Maximum external pacer

100 kHz

clock rate

Notes

1

Throughput is the maximum rate at which multiple channels can be scanned and still yield the same

result (within ±1 LSB) as a single channel scan (note that all channels must be within range of the
selected gain to assure proper settling). If using a single channel, the maximum sampling rate is 100
kHz for all gains.

2

The figures in the table show the electrical noise introduced by the analog front end but do not include

the uncertainty inherent in the quantization process. The inherent quantization noise introduced by any
ADC is due to uncertainty at code boundaries and adds a peak-to-peak value of 1 LSB to the electrical
noise; it also makes the rms level 0.5 LSBs.

A-3

Table A-2. Analog Output Specifications

Feature DAS-1600 Series Boards

DAC Channels 2
Resolution 12-bit (one part in 4096 or 224 ppm)
Data format Left-justified, offset binary
Range User input ±10.00 volts in multiplying DAC mode

0.000 to +5.000 V

0.000 to +10.000 V
±5.000 V
±10.000 V

Linearity Integral: ±∫ LSB typical; ±1 LSB maximum

Differential: ±1 LSB

Monotonicity: guaranteed over operating range
Maximum output current ±5 mA maximum
Settling time 4 µs to 0.01% typical
Output impedance < 0.1 ohm
Gain accuracy Adjustable to ±1 LSB
Offset accuracy Adjustable to 0
Power up DACs power up to 0.0 V at reset
Reference output voltage Accuracy: −5.0 V ±50 mV

Temperature coefficient: ±30 ppm/ ˚C

Load current: ±5.0 mA maximum

A-4 Specifications

Table A-3. Digital I/O Specifications (8-bits on Main I/O Connector)

Feature DAS-1600/1400 Series Boards

Outputs
(standard LSTTL)

Output bits: 4

Low voltage: 0.5 V maximum @ Isink= 8.0 mA

High voltage: 2.7 V minimum @ Isource = −0.4 mA
Inputs and interrupts

(standard LSTTL)

1

Input bits: 4

Low voltage: 0.8 V maximum

Low current: −0.2 mA maximum

High voltage: 2.0 V minimum

High current: 20 µA maximum

Notes

1

IP0/TRIG 0/XPCLK minimum pulse width = 10.0 ns.

Table A-4. Digital I/O Specifications (24-bits on PIO Cable Connector)

Feature DAS-1601/1602 Boards

Device type NMOS S8255A-5
I/O 24 bits
Outputs Low Voltage: 0.45 V maximum @ Isink = 1.7 mA

High voltage: 2.4 V minimum @ Isource = −0.2 mA
Inputs (and interrupts) Low voltage: 0.8 V maximum

Low current: −10 µA maximum

High voltage: 2.0 V minimum

High current: 10 µA maximum

A-5

Table A-5. Programmable Counter/Timer Specifications

Feature DAS-1600/1400 Series Boards

Device type 82C54-2
Number of counters 3 down counters, 16-bit

2 permanently connected to 1/10 MHz
Outputs (buffered) Low voltage: 0.5 V maximum @ Isink = 25 mA

High voltage: 2.0 V minimum @ Isource = −15 mA
Inputs (buffered) Low voltage: 0.8 V maximum.

Low current: −0.2 mA maximum

High voltage: 2.0 V minimum

High current: 20 µA maximum
Input and gate TTL/CMOS compatible
Clock input DC to 10 MHz
Active count edge Negative
Minimum clock pulse widths 30 ns high / 50 ns low

Table A-6. Power Supply Requirements

Feature DAS-1600 Series Boards DAS-1400 Series Boards

+5 VDC supply 800 mA typical; 1.0 A

maximum

+12 VDC supply 30 mA typical; 40 mA

maximum

−

12 VDC supply Not used

A-6 Specifications

500 mA typical; 750 mA
maximum

30 mA typical; 40 mA
maximum

Table A-7. Environmental Specifications

Attribute DAS-1600 Series Boards DAS-1400 Series Boards

Operating temperature 0 to 70 ˚C
Storage temperature
Humidity 0 to 95% noncondensing
Dimensions 9 in L x 4.25 in H x 0.90 in D

Weight 8 oz. (227 g)

−

20 to 70 ˚C

(22.9 cm x 10.8 cm x 2.29 cm)

5.5 in L x 4.25 in H x 0.75 in D
(14.0 cm x 10.8 cm x 1.9 cm)

A-7

Connector Pin Assignments

This appendix contains pin assignments for the I/O connectors of the
DAS-1600/1400 Series boards. See Figure 3-1 and Figure 3-2 for the
location of the main I/O connector (J1).

Main I/O Connector (J1)

The pin assignments of the main I/O connector (J1) on the
DAS-1600/1400 Series board are shown in Figure B-1.

B

LL GND Pin 19
Ch0 LO IN / Ch8 HI IN Pin 18

Ch1 LO IN / Ch9 HI IN Pin 17
Ch2 LO IN / Ch10 HI IN Pin 16
Ch3 LO IN / Ch11 HI IN Pin 15
Ch4 LO IN / Ch12 HI IN Pin 14

Ch5 LO IN / Ch13 HI IN Pin 13
Ch6 LO IN / Ch14 HI IN Pin 12
Ch7 LO IN / Ch15 HI IN Pin 11
D/A 0 REF IN* Pin 10

D/A 0 OUT* Pin 9
VREF (-5)* Pin 8

POWER GND Pin 7

IP 1 / XTRIG Pin 6
IP 3 Pin 5
OP 1 Pin 4
OP 3 Pin 3

CTR 0 OUT Pin 2

+5 V PWR Pin 1

Rear View

Pin 37 Ch0 HI IN
Pin 36 Ch1 HI IN
Pin 35 Ch2 HI IN

Pin 34 Ch3 HI IN
Pin 33 Ch4 HI IN
Pin 32 Ch5 HI IN
Pin 31 Ch6 HI IN

Pin 30 Ch7 HI IN
Pin 29 LL GND

Pin 28 LL GND
Pin 27 D/A 1 OUT*
Pin 26 D/A 1 REF IN*
Pin 25 IP 0 / TRIG 0 / XPCLK

Pin 24 IP 2 / CTR 0 GATE

Pin 23 OP 0
Pin 22 OP 2
Pin 21 CTR 0 CLOCK IN

Pin 20 CTR 2 OUT

* Not connected in DAS-1400 Series

Figure B-1. Pin Assignments of Main I/O Connector (J1) on DAS-1600/1400 Series

Main I/O Connector (J1) B-1

PIO Cable Connector (J2) (DAS-1600 Series Only)

The pin assignments of PIO cable connector (J2) are shown in Figure B-2.

Rear View

PORT B

DIG.COM. Pin 19
+5 V Pin 18

DIG. COM. Pin 17
not connected Pin 16
DIG. COM. Pin 15
not connected Pin 14

DIG. COM. Pin 13
not connected Pin 12
DIG.COM. Pin 11
PB 0 Pin 10

PB 1 Pin 9
PB 2 Pin 8

PB 3 Pin 7

PB 4 Pin 6
PB 5 Pin 5
PB 6 Pin 4
PB 7 Pin 3

not connected Pin 2

not connected Pin 1

Pin 37 PA 0
Pin 36 PA 1
Pin 35 PA 2
Pin 34 PA 3
Pin 33 PA 4
Pin 32 PA 5
Pin 31 PA 6

Pin 30 PA 7
Pin 29 PC 0

Pin 28 PC 1
Pin 27 PC 2
Pin 26 PC 3
Pin 25 PC 4

Pin 24 PC 5

Pin 23 PC 6
Pin 22 PC 7
Pin 21 DIG. COM.

Pin 20 +5 V

Figure B-2. Pin Assignments of PIO Cable Connector (J2)

PORT A

PORT CL

PORT CH

B-2 Connector Pin Assignments

Register-Level Address Map

DAS-1600/1400 Series boards are programmable at the register-level
using I/O instructions. In BASIC, I/O instructions are

X,Y

. In assembly and most other low-lev el languages, the I/O instructions
are similar to BASIC’s I/O instructions; for example, the assembly
language equivalents are

As an aid to register-level programming, this chapter describes each I/O
register in terms of function, address, bit structure, and bit functions. The
chapter does not describe how to program at the register-level.

Register Functions

IN AL,DX

and

OUT DX,AL

INP(X)

.

and

C

OUT

DAS-1600/1400 Series register functions are categorized as follows:

●

Analog-to-Digital converter (ADC) registers

●

MUX scan register
Digital input and output registers

●

●

Digital-to-Analog converter (DAC) output registers (DAS-1600
Series only)

Status registers

●

●

Control register

●

Programmable gain selection and burst rate register
Counter enable and burst length register

●

●

82C54 programmable interval counter/timer registers

●

8255 programmable I/O registers (DAS-1600 only)

Register Functions C-1

1600 mode and burst mode enable registers

●

DAS-1600/1400 Series boards use 32 I/O mapped addresses. The first 16
locations start at the base address in the computer's I/O space. The next
eight locations start at the base address +400h. The remaining eight
locations are for future use; they have no current function.

The addresses start at the base address and extend as shown in the I/O
map of Table C-1.

Table C-1. Register-Level Address Map

Location Function Type Name

Base Address +0h Low-byte of ADC register, A/D

conversion
Base Address +1h High-byte of ADC register Read AD1
Base Address +2h ADC MUX scan register Read/Write MUX
Base Address +3h Digital input byte (IP0-3), Board ID Read DIO

Digital output byte (OP0-3) Write
DAC Output Registers Base Address +4h to +7h (DAS-1600 Series only)
Base Address +4h Low-byte of DAC0 (DAS-1600 only) Write DAOLB
Base Address +5h High-byte of DAC0 (DAS-1600 only) Write DA0HB
Base Address +6h Low-byte of DAC1 (DAS-1600 only) Write DA1LB
Base Address +7h High-byte of DAC1 (DAS-1600 only) Write DA1HB
Base Address +8h Status register A Read/Write STATUS A
Base Address +9h Control register Read/Write CTRL
Base Address +Ah Counter enable and burst length register Read/Write CNTEN
Base Address +Bh Gain selection and burst rate register Read/Write GAIN
82C54 Programmable Interval Timer

Read/Write AD0

Base Address +Ch Counter 0 register Read/Write TIMER0
Base Address +Dh Counter 1 register Read/Write TIMER1
Base Address +Eh Counter 2 register Read/Write TIMER2

C-2 Register-Level Address Map

Table C-1. Register-Level Address Map (cont.)

Location Function Type Name

Base Address +Fh 82C54 Counter Control Write TIMERCTL
Bidirectional digital ports A,B, CL, and CH (82C55 Programmable I/O) (DAS-1600 Series

only)
Base Address +400h Digital port A Read/Write PIOPA
Base Address +401h Digital port B Read/Write PIOPB
Base Address +402h Digital port CL and CH Read/Write PIOPC
Base Address +403h 82C55 control register Write PIOCTL
Base Address +404h Conversion disable register Write DISARM
Base Address +405h Burst mode enable register Write BMDEN
Base Address +406h

Base Address +407h Status register B Read STATUSB

1600/1400 mode enable register Write 1600MDEN

1400MDEN

The following sections describe the I/O registers in more detail.

ADC Registers (Base Address +0h and +1h)

Base address +0h and base address +1h are used for the following:

A/D conversion data

●

●

MUX channel number from which data is converted

●

Start a software controlled A/D conversion

The ADC re gisters are read in standard Intel 8088 Lo/Hi-byte sequence. A
write to base +0 initiates an A/D conversion.

Data is left-justified true binary, and the MUX channel address is in the
least-significant nibble; thus, data is tagged according to its channel of
origin. ADC data is latched so that data from the previous conversion is
available until the end of the following conversion. You can mask or
discard channel information, as required.

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