IOtech Digital488OEM User manual

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© 1990… 2004 by IOtech, Inc. 916895 Printed in the United States of America.
Digital488 and Digital488/32/OEM
IEEE 488 to Digital I/O Interface
IOtech, Inc.
25971 Cannon Road
Cleveland, OH 44146-1833
Phone: [phone]
Fax: [phone]
E-mail (Product Information): [email protected]
E-mail (Technical Support): [email protected]
Internet: www.iotech.com
Digital488 and
Digital488/32/OEM
IEEE488 to Digital I/O Interface
p/n 110-0901 Rev 6.0

Warranty Information
Your IOtech warranty is as stated on the product warranty card. You may contact IOtech by phone,
fax machine, or e-mail in regard to warranty-related issues.
Phone: [phone], fax: [phone], e-mail: [email protected]
Limitation of Liability
IOtech, Inc. cannot be held liable for any damages resulting from the use or misuse of this product.
Copyright, Trademark, and Licensing Notice
All IOtech documentation, software, and hardware are copyright with all rights reserved. No part of this product may be
copied, reproduced or transmitted by any mechanical, photographic, electronic, or other method without IOtech’s prior
written consent. IOtech product names are trademarked; other product names, as applicable, are trademarks of their
respective holders. All supplied IOtech software (including miscellaneous support files, drivers, and sample programs)
may only be used on one installation. You may make archival backup copies.
CE Notice
Many IOtech products carry the CE marker indicating they comply with the safety and emissions standards of the
European Community. As applicable, we ship these products with a Declaration of Conformity stating which
specifications and operating conditions apply.
Warnings, Cautions, Notes, and Tips
Refer all service to qualified personnel. This caution symbol warns of possible personal injury or equipment damage
under noted conditions. Follow all safety standards of professional practice and the recommendations in this manual.
Using this equipment in ways other than described in this manual can present serious safety hazards or cause equipment
damage.
This warning symbol is used in this manual or on the equipment to warn of possible injury or death from electrical
shock under noted conditions.
This ESD caution symbol urges proper handling of equipment or components sensitive to damage from electrostatic
discharge. Proper handling guidelines include the use of grounded anti-static mats and wrist straps, ESD-protective
bags and cartons, and related procedures.
This symbol indicates the message is important, but is not of a Warning or Caution category. These notes can be of
great benefit to the user, and should be read.
In this manual, the book symbol always precedes the words “Reference Note.” This type of note identifies the location
of additional information that may prove helpful. References may be made to other chapters or other documentation.
Tips provide advice that may save time during a procedure, or help to clarify an issue. Tips may include additional
reference.
Specifications and Calibration
Specifications are subject to change without notice. Significant changes will be addressed in an addendum or revision to
the manual. As applicable, IOtech calibrates its hardware to published specifications. Periodic hardware calibration is
not covered under the warranty and must be performed by qualified personnel as specified in this manual. Improper
calibration procedures may void the warranty.
Quality Notice
IOtech has been an ISO 9001 registered firm since 1996. Prior to shipment, we thoroughly test our products and
review our documentation to assure the highest quality in all aspects. In a spirit of continuous improvement,
IOtech welcomes your suggestions.

DaqBook/DaqBoard/Daq PC-Card User’s Manual 916895 Index-i
Table of Contents
1 - Introduction
General Description …… 1-1
Digital488 …… 1-1
Digital488/32/OEM …… 1-1
Available Accessories …… 1-2
Specifications …… 1-2
Digital488 Specifications …… 1-2
Digital I/O …… 1-2
IEEE 488 …… 1-3
General …… 1-3
Digital488/32/OEM Specifications …… 1-4
Digital I/O …… 1-4
IEEE 488 …… 1-4
General …… 1-5
Abbreviations …… 1-6
2 - Getting Started
Inspection …… 2-1
Configuration …… 2-1
IEEE 488 Address Selection …… 2-2
IEEE 488 Bus Output Terminator
Selection ……2-3
Digital Input/Output Ports …… 2-3
Logic Levels …… 2-3
Digital I/O Port Pin Outs …… 2-4
Control Lines …… 2-5
Clear …… 2-5
Data Strobe …… 2-5
External Data Ready [EDR] …… 2-6
Inhibit …… 2-6
Trigger …… 2-6
Service …… 2-7
IEEE 488 Bus Implementation …… 2-7
My Talk Address (MTA) …… 2-7
My Listen Address (MLA) …… 2-8
Device Clear (DCL and SDC) …… 2-8
Group Execute Trigger (GET) …… 2-8
Interface Clear (IFC) …… 2-8
Serial Poll Enable (SPE) …… 2-8
Serial Poll Disable (SPD) …… 2-8
Unlisten (UNL) …… 2-8
Untalk (UNT) …… 2-8
Installation …… 2-9
3 - Command Descriptions
Bit Set An …… 3-1
Bit Clear Bn …… 3-1
Bus Input/Output Gn …… 3-2
Configure Cn …… 3-2
Data Dn....Z …… 3-3
Data Ready Rn …… 3-4
End or Identify (EOI) Kn …… 3-4
Execute X …… 3-5
Format Fn …… 3-5
F0 Format- ASCII Hexadecimal …… 3-5
F1 Format - ASCII Character …… 3-6
F2 Format - ASCII Binary …… 3-7
F3 Format - ASCII Decimal …… 3-7
F4 Format - Binary …… 3-8
F5 Format - High Speed Binary …… 3-8
Handshake Hn …… 3-9
Inhibit Qn …… 3-9
Invert In …… 3-9
Port Pn …… 3-10
Service Request Mask (SRQ) Mn …… 3-10
Serial Poll Status Byte …… 3-11
Status Un …… 3-12
Terminator Yn …… 3-14
Test T0 …… 3-15

ii 916895 DBK Option Cards & Modules User’s Manual
4 - IEEE 488 Primer
History …… 4-1
General Structure …… 4-1
Send It To My Address …… 4-3
Bus Management Lines …… 4-3
Attention (ATN) …… 4-3
Interface Clear (IFC) …… 4-3
Remote Enable (REN) …… 4-3
End or Identify (EOI) …… 4-3
Service Request (SRQ) …… 4-3
Handshake Lines …… 4-4
Data Valid (DAV) …… 4-4
Not Ready for Data (NRFD) …… 4-4
Not Data Accepted (NDAC) …… 4-4
Data Lines …… 4-4
Multiline Commands …… 4-5
Go To Local (GTL) …… 4-5
Listen Address Group (LAG) …… 4-5
Unlisten (UNL) …… 4-5
Talk Address Group (TAG) …… 4- 5
Untalk (UNT) …… 4-5
Local Lockout (LLO) …… 4-5
Device Clear (DCL) …… 4-5
Selected Device Clear (SDC) …… 4-5
Serial Poll Disable (SPD) …… 4-5
Serial Poll Enable (SPE) …… 4-5
Group Execute Trigger (GET) …… 4-5
Take Control (TCT) …… 4-5
Secondary Command Group (SCG) …… 4-5
Parallel Poll Configure (PPC) …… 4-6
Parallel Poll Unconfigure (PPU) …… 4-6
More On Service Requests …… 4-6
Serial Poll …… 4-6
Parallel Poll …… 4-6
5 - Service Information
Factory Service …… 5-1
Theory of Operation …… 5-1
Digital488 Mother Board …… 5-2
Digital488 I/O Board …… 5-4
Digital488/32/OEM …… 5-5
Digital488/OEM …… 5-6
Appendix A Digital488 Command Summary
Appendix B IEEE Command and Address
Messages
Appendix C Digital488/OEM Mechanical
Dimensions