Keithley DAS-8 Series User manual

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DAS-8 Series
User’s Guide
A GREATER MEASURE OF CONFIDENCE
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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 deter-
mines 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.
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Disclaimer of Warranties
EXCEPT FOR THE EXPRESS WARRANTIES ABOVE KEITHLEY DISCLAIMS ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANT-
ABILITY 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, DAM-
AGES, OR EXPENSES RELATED TO THE GOODS OR SERVICES PROVIDED UNDER THIS WARRANTY.
Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]
1-888-KEITHLEY (534-8453) • www.keithley.com
Sales Offices: BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]
CHINA: Yuan Chen Xin Building, Room 705 • 12Yumin 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 • 2-14Yangjae-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]
4/02
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DAS-8 Series
User’s Guide
Revision H- June 2002
Part Number: 66160
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The information contained in this manual is believed to be accurate and reliable. However, Keithley
Instruments, Inc., assumes no responsibility for its use; nor for any infringements or 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 Keithley Instruments, Inc.
KEITHLEY INSTRUMENTS, INC., SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES RELATED TO THE USE OF THIS PRODUCT. THIS
PRODUCT IS NOT DESIGNED WITH COMPONENTS OF A LEVEL OF RELIABILITY THAT IS
SUITED FOR USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.
All brand and product names are trademarks or registered trademarks of their respective companies.
© Copyright Keithley Instruments, Inc., 1999, 1993.
All rights reserved. Reproduction or adaptation of any part of this documentation beyond that permitted
by Section 117 of the 1976 United States Copyright Act without permission of the Copyright owner
is unlawful.
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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 is the individual or group responsible for the use and maintenance of equipment, for ensuring that
the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately
trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use
of the instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting
the line voltage or replacing consumable materials. Maintenance procedures are described in the manual. The proce-
dures 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 mea-
surement, 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 localAC 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. A good safety practice is to expect that hazardous volt-
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 ex-
posed 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, no conductive part of the circuit
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.
S
afety Precautions
5/02
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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 cir-
cuit 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 in-
stalling 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 op-
erating 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 heading in a manual explains dangers that might result in personal injury or death. Always read the
associated information very carefully before performing the indicated procedure.
The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate
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.
!
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vii
Preface
The DAS-8 Series User’s Guide provides the information needed to set
up, install, and use DAS-8 Series boards.
The manual is intended for data acquisition system designers, engineers,
technicians, scientists, and other users responsible for setting up, cabling,
and wiring signals to DAS-8 Series boards. It is assumed that users are
familiar with data acquisition principles and with their particular
application.
The DAS-8 Series User’s Guide is organized as follows:
• Section 1 provides an overview of the features of DAS-8 Series
boards, including a description of supported software and accessories.
• Section 2 provides a more detailed description of the analog input,
digital I/O, analog output, and counter/timer I/O features of DAS-8
Series boards.
• Section 3 describes how to unpack, configure, and install DAS-8
Series boards.
• Section 4 describes how to attach accessory and expansion boards
and how to wire signals to DAS-8 Series boards.
• Section 5 describes how to use DriverLINX Analog I/O Panel and
DriverLINX Test Panel options to test functions of DAS–8
Series boards.
• Section 6 describes how to calibrate DAS-8 Series boards.
• Section 7 provides troubleshooting information.
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viii
• Appendix A lists the specifications for DAS-8 Series boards.
• Appendix B lists the connector pin assignments.
• Appendix C provides information for programming DAS-8 Series
boards using DriverLINX.
An index completes this manual.
Throughout the manual, keep the following in mind:
• References to DAS-8 Series boards apply to the DAS-8, DAS-8/LT,
DAS-8/PGA, DAS-8/PGA-G2, and DAS-8/AO boards. When a
feature applies to a particular board, that board’s name is used.
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Table of Contents
Overview ..................................................................................................... 1-1
DAS-8 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
DAS-8 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Functional Description .............................................................................. 2-1
Analog Input Features . . . . . . . . . . . . . . . . . . . . . . . 2-2
Channel Configuration . . . . . . . . . . . . . . . . . . . 2-3
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Custom Clock Frequencies . . . . . . . . . . . . . . 2-10
Conversion Clock Sources (DAS-8/PGA(G2),
DAS-8/AO, and DAS-8/LT) . . . . . . . . . . . 2-11
Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Hardware Gates . . . . . . . . . . . . . . . . . . . . . . . 2-16
Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
DAS-8/AO Analog Output Features . . . . . . . . . . . 2-18
Digital I/O Features . . . . . . . . . . . . . . . . . . . . . . . . 2-19
82C54 Counter/Timer Circuitry . . . . . . . . . . . . . . . 2-20
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Setup and Installation ................................................................................ 3-1
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . 3-1
Unpacking the Board . . . . . . . . . . . . . . . . . . . . . . . . 3-2
DAS-8 Series Boards . . . . . . . . . . . . . . . . . . . . . . . . 3-3
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Configuring the Board . . . . . . . . . . . . . . . . . . . . . . . 3-7
Setting the Base Address . . . . . . . . . . . . . . . . . 3-8
Setting the Input Configuration . . . . . . . . . . . 3-12
Setting the Interrupt Level . . . . . . . . . . . . . . . 3-13
Analog Output Voltage Range Adjustments
(DAS-8/AO Only) . . . . . . . . . . . . . . . . . . . 3-14
D/A Output Channel Update
(DAS-8/AO Only) . . . . . . . . . . . . . . . . . . . 3-16
Wait-State Setting (DAS-8/AO Only) . . . . . . 3-16
Clock Select (DAS-8/LT Only) . . . . . . . . . . . 3-16
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Custom Clock Frequencies . . . . . . . . . . . . . . 3-16
4–20mA Current Loops . . . . . . . . . . . . . . . . . . . . . 3-17
The Reference (DAS-8 and DAS-8/LT Only) . . . . 3-17
Interface to Transducers, Thermocouples, etc. . . . 3-18
Application Precautions . . . . . . . . . . . . . . . . . . . . . 3-20
Installing and Configuring DriverLINX for
DAS-8 Series Boards . . . . . . . . . . . . . . . . . . . 3-21
Installing the DAS-8 Series Standard
Software Package . . . . . . . . . . . . . . . . . . . . 3-22
Installing DriverLINX . . . . . . . . . . . . . . . . . . 3-24
Configuration with DriverLINX . . . . . . . . . . 3-25
Installing the Board . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Configuring DriverLINX . . . . . . . . . . . . . . . . . . . . 3-26
Editing a Configuration File . . . . . . . . . . . . . . . . . 3-28
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Cabling and Wiring ................................................................................... 4-1
Attaching Accessory and Expansion Boards . . . . . . 4-1
Attaching an STC-37 Screw
Terminal Connector . . . . . . . . . . . . . . . . . . . 4-3
Attaching an STA-08 / STA-08PGA
Screw Terminal Accessory . . . . . . . . . . . . . 4-5
Attaching an EXP-16 or EXP-16/A Expansion
Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Attaching an EXP-GP Expansion Board . . . . . 4-7
Attaching an MB Series Backplane . . . . . . . . . 4-8
Connecting Multiple Expansion Boards . . . . . 4-8
Connecting Signals . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Connecting an Analog Input Signal to a
Single-Ended Input . . . . . . . . . . . . . . . . . . 4-10
Connecting an Analog Input Signal to a
Differential Input . . . . . . . . . . . . . . . . . . . . 4-11
Connecting Analog Output Signal from a
DAS-8/AO Board . . . . . . . . . . . . . . . . . . . . 4-12
Connecting Digital Signals . . . . . . . . . . . . . . 4-13
Connecting Counter/Timer I/O Signals . . . . . 4-14
Synchronizing Conversions on
Multiple Boards . . . . . . . . . . . . . . . . . . . . . 4-14
4–20mA Current Loops . . . . . . . . . . . . . . . . . . . . . 4-16
The Reference (DAS-8 and DAS-8/LT Only) . . . . 4-16
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Calibration ................................................................................................... 5-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Troubleshooting ......................................................................................... 6-1
Problem Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . 6-3
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Specifications ............................................................................................. A-1
DAS-8 Specifications . . . . . . . . . . . . . . . . . . . A-1
DAS-8/PGA Specifications . . . . . . . . . . . . . . A-4
DAS-8/AO Specifications . . . . . . . . . . . . . . . A-5
DAS-8/LT Specifications . . . . . . . . . . . . . . . . A-8
Connector Pin Assignments ..................................................................... B-1
DriverLINX Implementation Notes ........................................................ C-1
Logical Channels . . . . . . . . . . . . . . . . . . . . . . . C-3
Analog Input Subsystem . . . . . . . . . . . . . . . . . . . . . C-3
Logical Channels . . . . . . . . . . . . . . . . . . . . . . . C-3
Analog Input Initialization . . . . . . . . . . . . . . . . C-3
External Triggering . . . . . . . . . . . . . . . . . . . . . C-4
External Clocking . . . . . . . . . . . . . . . . . . . . . . C-5
Data Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
A/D Conversion Delay . . . . . . . . . . . . . . . . . . . C-6
A/D Data Lost . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Analog Output Subsystem . . . . . . . . . . . . . . . . . . . . C-7
Analog Output Initialization . . . . . . . . . . . . . . C-7
External Triggering . . . . . . . . . . . . . . . . . . . . . C-7
External Clocking . . . . . . . . . . . . . . . . . . . . . . C-8
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Data Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
D/A Conversion Delay . . . . . . . . . . . . . . . . . . . C-9
D/A Data Lost . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Digital Input and Output Subsystems . . . . . . . . . . C-10
Logical Channels . . . . . . . . . . . . . . . . . . . . . . C-10
Digital Input Initialization . . . . . . . . . . . . . . . C-10
Digital Output Initialization . . . . . . . . . . . . . . C-10
Digital I/O Conversion Delay . . . . . . . . . . . . C-10
Digital I/O Data Lost . . . . . . . . . . . . . . . . . . . C-10
Counter/Timer Subsystem . . . . . . . . . . . . . . . . . . . C-11
Logical Channels . . . . . . . . . . . . . . . . . . . . . . C-11
Counter/Timer Initialization . . . . . . . . . . . . . C-12
Counter/Timer Interrupt . . . . . . . . . . . . . . . . . C-12
Event Counting . . . . . . . . . . . . . . . . . . . . . . . C-12
Frequency Measurement . . . . . . . . . . . . . . . . C-13
Pulse Output . . . . . . . . . . . . . . . . . . . . . . . . . . C-14
Oneshot Pulse Output . . . . . . . . . . . . . . . . . . C-15
Time Interval Measurements . . . . . . . . . . . . . C-15
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1-1
1
Overview
DAS-8 Hardware
The DAS-8 Series consists of the DAS-8, the DAS-8LT, the DAS-8PGA
and DAS-8PGA-G2, and the DAS-8AO for IBM PC and PC compatible
computers.The DAS-8 boards with DriverLINX software require:
• an IBM PC or compatible AT (386, or Pentium CPU) with minimum
of 2 MB of memory
• at least one CD-ROM drive, and one fixed disk drive
• MS–DOS/PCDOS 3.1 or higher
• Microsoft Windows 95/98 ( Note: DAS-8 Series boards are not
compatible with Windows NT).
• a compiler supporting Microsoft Windows development
• a mouse is highly recommended
Each member of the DAS-8 Series has the same functions with the
following differences:
• DAS-8/LT — for use in a laptop or portable computer. Has 1 MHz
clock for sample timing.
• DAS-8/PGA and DAS-8/PGA-G2 — has software-programmable
input ranges of ±10V, ±5V, ±0.5V, ±0.05V, ±0.01V, 0 to +10V, 0 to
+1V, and 0 to +0.02V (DAS-8/PGA), or ±5V, ±2.5V, ±1.25V,
±0.625V, 0 to +5V, 0 to +2.5V, 0 to +1.25V, and 0 to +0.625V
(DAS-8/PGA/G2) and each channel is switch-selectable for
single-ended and differential inputs.
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1-2 Overview
• DAS-8/AO — same as DAS-8/PGA with two 12-bit analog outputs
and onboard pacer clock for sample timing.
The DAS-8 Series features an 8-channel, 12-bit successive approximation
A/D converter with sample and hold. The full scale input of each channel
is fixed at ±5V on the DAS-8and DAS-8LT and software-programmable
on the DAS-8PGA and DAS-8/AO. The A/D conversion time is typically
25 µ s (35 µ s max.). Using the DriverLINX software supplied with the
board, throughputs of up to 4ksamples per second are attainable.
An onboard 82C54 programmable counter-timer provides periodic
interrupts for the A/D sample timing. In the DAS-8, this timer obtains its
input clock directly from the computer’s ISA bus clock (usually 4.77, 6,
or 8 MHz). The DAS-8/LT, DAS-8PGA, and DAS-8/AO have an onboard
1 MHz crystal. Two additional counters on the 82C54 are available for
event counting, pulse and waveform generation, frequency, period, and
pulse width measurements.
The 7 bits of TTL digital I/O consist of one 4-bit output port and one 3-bit
input port. In addition, a precision +10.00V (±0.1V) reference voltage
output is derived from the A/D converter reference. This output can
source/sink 2mA.
A jumper-selectable external interrupt input selects any of the interrupt
levels (2 through 7) and allows interrupt routines to provide background
data acquisition or interrupt-driven control. The interrupt input can be
externally connected to the counter/timer or other trigger source.
The two 12-bit analog output channels of the DAS-8/AO are
independently switch-selectable to full-scale output ranges of ±10V, ±5 V,
±2.5V, 0 to +10V, 0 to +5V, or 4 to 20mA. Simultaneous update of both
channels is supported in DriverLINX.
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1-3
DAS-8 Software
The following software is available for operating DAS-8 Series boards:
• DAS-8 Series standard software package — Shipped with DAS-8
Series boards. Includes DriverLINX for Microsoft Windows and
function libraries for writing application programs 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 includes:
• DriverLINX API DLLs and drivers supporting the DAS-8
Series hardware.
•
Analog I/O Panel - A DriverLINX program that verifies the
installation and configuration of DriverLINX to your
DAS-8 Series board and demonstrates several virtual bench-top
instruments.
•
Learn DriverLINX - an interactive learning and demonstration
program for DriverLINX that includes a Digital Storage
Oscilloscope.
•
Source Code - for the sample programs.
•
DriverLINX Application Programming Interface files - for the
DAS-8 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-8 Series hardware.
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1-4 Overview
• DAS-8 Series utilities — The following utilities are provided as part
of both the DAS-8 Series standard software package:
•
DriverLINX Calibration Utility
•
DriverLINX Test Panel
• DAS-8 Series register I/O map — If you cannot satisfy your
application’s requirements with the available software packages and
you are an experienced programmer, you may be able to program
your DAS-8 Series board through direct register I/O instructions.
Contact the factory for more information.
Note:
Attempts to combine register-level programing of counter/timer
functions with DriverLINX programming can produce unexpected
results.
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1-5
Accessories
The following accessories are available for use with DAS-8 Series boards:
• STC-37 screw terminal connector — For all DAS-8 Series boards,
provides 37 screw terminals that allow you to access the functions of
the board; connects directly to the DAS-8 Series board without a
cable.
• STP37 screw terminal panel — For all DAS-8 Series boards,
provides 37 screw terminals that allow you to access the functions of
the board. Requires a C1800 or S1800 cable.
• STA-08 screw terminal accessory — For the DAS-8 or DAS-8/LT
boards only, provides screw terminals that allow you to access the
functions of the board; provides a breadboard area with power and
additional screw terminals to access the user-designed circuitry.
Requires a C1800 or S1800 cable.
• STA-08PGA screw terminal accessory — For the DAS-8/PGA and
DAS-8/PGA/G2 boards only, provides screw terminals that allow you
to access the functions of the board; provides a breadboard area with
power and additional screw terminals to access the user-designed
circuitry. Requires a C1800 or S1800 cable.
• STA-08AO screw terminal accessory — For the DAS-8/AO board
only, provides screw terminals that allow you to access the functions
of the board; provides a breadboard area with power and additional
screw terminals to access the user-designed circuitry. Requires a
C1800 or S1800 cable.
• EXP-16 and EXP-16/A e pansion board s — Sixteen-channel
multiplexer and signal-conditioning expansion boards that provide
cold junction compensation (CJC) for thermocouples and switch-
selectable gains ranging from 0.5 to 2000.
• EXP-GP e pansion board — An 8-channel signal-conditioning
expansion board; connects to RTDs, thermistors, strain gages, and
other variable resistance sensors; provides CJC for thermocouples
and switch-selectable gains of 1, 10, 100, and 1000 or 2.5, 25, 250,
and 2500.
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