Tektronix DAS-1200 Series Users Guide

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over.frm Page 1 Tuesday, June 7,1994 lo:45 AM

DAS-1200 Series

User’s Guide

.frm Page 1 Tuesday, June 7, 1994 lo:46 AM

DAS-1200 Series

User’s Guide

Revision A - June 1994

Part Number: 81470

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2 ‘-

The information contained in this manual is believed to be accurate and reliable. However, the manufacturer assumes no responsibility for its use or for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent rights of the manufacturer.

THE MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TG THE USE OF THIS PRODUCT. THIS PRODUCT

IS NOT DESIGNED WITH COMPONENTS OF A LEVEL OF RELIABILITY SUITABLE FOR USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.

All br;ind and product wunes are trademarks or registered trademarks of their respective companies.

0 Copyright Keithley Instruments, Inc., 1994.

All rights reserved. Reproduction or adaptation of any pat of this documentation beyond that permitted by Section 117 of the 1976 United States Copyright Act without permission of the Copyright owner is u1lawful.

& 1200ug.toc Page iii Tuesday, June 7, 1994 lo:46 AM

Table of Contents

Preface Manual Organization. . Related Documents

1 Overview

Features ......................................

Supporting Software

Accessories

2 Functional Description

Analog Input Features

Differential/Single-Ended Selection Channel Selection in Expanded Configurations, Gain Selection. Conversion Modes Clock Sources Triggers

Data Transfer Modes. Digital I/O Features Counter/Timer Features. Wait State Selection.

Power ........................................

...................................

..............................

...............................

....................................

.............................

............................

...........................

..............

...........................

.........................

............................

....

. . . ..xi

xii

.1-l

. . 1-3

l-6

.2-3 .2-3 .2-3 .2-5 .2-6

.,2-l

.2-x

.2-9 .2-10 .2-11 .2-12

.2-12

Setup and Installation

Inspecting Your Package . . Installing me Software Package. .

Installing the DA%1200 Series Standard Software Installing the ASO- Advanced Software Option.

DOS Installation. . . . . .

Windows Installation.

Creating a Configuration File .

Default Configuration File . Configuration Utility. . .

.3-l .3-2 .3-2 ,3-3 .3-3 .3-4 .3-6 .3-6 .3-l

iii

4 1200ug.toc Page iv Tuesday, June 7, 1994 lo:46 AM

Setting Switch-Configurable Options

Setting the Gain Selection Switch.

..........

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

Setting an Alternate Base Address Setting the Clock Select Switch Setting the Wait State Enable Switch Setting the DMA Channel Select Switch

..........

............

........

.....

Installing the Board ........................

Cabling and Wiring

Attaching Screw Terminal Connectors and Accessories.

Attaching an STC-37

..............................

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

Attaching an STA-16.

..............................

Attaching an STA-U ...............................

Attaching Expansion Accessories

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

Attaching an EXP-16 or EXP-16/A Expansion Accessory .4-l 1 Attaching an EXP-GP Expansion Accessory Attaching Multiple Expansion Accessories

........... .4- 12

............ .4-13

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

Attaching SSH Accessories. ..........................

Attaching an SSH-4/A

............................

Attaching an SSH-8 ..............................

Attaching an MB Series Backplane.

Attaching an MB01 Backplane.

.................... .4-20

..................... .4-21

Attaching an MB02 Backplane. 4-22

Connecting Analog Signals

...........................

Precautions for Using the DAS-1201 Board at High Gains .4-24

Additional Precautions

............................

Connecting a Signal to a Single-Ended Analog Input Connecting a Signal to a Differential Analog Input

Common Connection Schemes for Differential Inputs .4-27 Avoiding Ground Loops with Differential Inputs

..... .3-14

... .,.3-l 5

... .,.3-l 6

... .,.3-l 8

... .,.3-l R

.... .,3-1x

... .,.3-l 8

..... .4-2

.4-2 .4-5 .4-6 .4-X

.4- 16

.4- 17 .4-17

.4-24 .4-25

.... .4-26

...... .4-27

..... .4-29

The Control Panel

6 Calibration

Equipment Requirements. ..................

Potentiometers and Test Points ..............

Calibration Utility ........................

6-1

_._.,_. 6-1

.6-2

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Troubleshooting

Problem Isolation. . .7- 1

Identifying Symptoms and Possible Causes. .7-l Testing the Board and Host Computer .7-4 Testing the Accessory Slot and I/O Connections .7-5

Technical Support . .7-6

Specifications

Connector Pin Assignments

Main I/O Connector (Jl) . .B-2

PI0 Cable Connector (54) . . . . .B-3

Using the DAS-1600 External Driver

Options Supported.

Quick Start. .........................................

Setting Up the Board.

Loading the DAS-1600 External Driver. ...............

Loading the External Driver in Multiple Board Configurations. Using the External Driver with Application Software

Packages........................................C- 4

VIEWDAC.....................................C- 4

EASYESTLXJAG ..............................

ASYST........................................C- 5

DAS-1600 External Driver Characteristics ................

Chatmels and Gains.

Cascading Multiple Expansion Accessories, ............

Setting Expansion Accessory Gains. ..................

Conversiou Modes

Using Pseudo-Digital Output

Burst Mode and SSH Mode. .....................

Altering the Burst Mode Conversion Rate.

ClockSources..

Triggers.........................................C-14

Using Pseudo-Digital Output Channels. ............

Types of Analog Triggers. .......................

Using a Hysteresis Value

Synchronous, DMA, and Interrupt Operations. .C- 19

..................................

..............................

...................................

...............................

................................

Chatmels

..................................

........................

..............

...........

.C- 1

c-2

.C-2 .C-3

.C-3

C-4

.C-5 .C-5

.C-6 .C-7 .C-8 .C-8

.C-10

C-1 1

.C-14 .C-14

.C- 17 .C-18

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Digital I/O Characteristics .

DAS-1600/1200 Series Boards DAS-1400 Series Boards,

Counterlrimer Functions

Event Counting

Pulse output. . . .

Software Interrupt Vectors . . . .

DAS-1600 External Driver Error Messages

Keithley Memory Manager

Installing and Setting Up the KMM. . . . . . D-2

Using KMMSETUPEXE D-2 Using a Text Editor, D-3

Removing the KMM . D-4

ADC Registers (Base Address +Oh and + 111) .E-3 MUX Scan Register (Base Address +2h) .E-4 Unidirectional Digital Input and Output Registers

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

Status Register A (Base Address +8h). .E-6 Control Register (Base Address +9h) . . .E-8 Counter Enable/Burst Length Register (Base Address +Ab) .E- 10 Burst Rate Register (Base Addresses +Bh) .E- 12 82C54 Programmable Interval Counter/Timer (Base Addresses +Ch, +Dh, +Eh, +Fh) .E- 14

Generating Square Waves of Programmed Frequency. .E-16 Measuring Frequency and Period . .E- 17 Using Counter 0 for Generating Programmable

TimeDelays . . . . . . ..E-18

82C54 Counter/Timer Control Register (Base Address +Fh). .E- 19

Readback Command Byte (Returned when

SC1 & SC0 are 1). . . .E-22

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

Bidirectional Digital Ports A, B, CL, and CH R255A-5 Programmable Peripheral Interface

(Base Address +40011 to +403h) . . . . . . . . . . . . . . . . . . .._... E-24

Control Register (Base Address +40311). . . .E-25

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

.c-20 .c-20 .C-7.4 .C-25 .C-25 .C-26 .C-26 .c-21

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

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

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

Index

List of Figures Figure 2-l. Figure 2-2.

Figure 2-3. Figure 3-l.

Figure 3-2. Figure 3-3. Figure 4- 1.

Figure 4-2. Figure 4-3. Figure 4-4.

Figure 4-5. Figure 4-6.

Figure 4-l. Figure 4-8. Figure 4-9.

Figure 4-10. Attaching an EXP-GP Expansion Accessory .4-13 Figure 4-l 1. Attaching Multiple Expansion Accessories. .4-14

Figure 4-12. Attaching Multiple Expansion Accessories with Figure 4-13. Attaching an ISO- Accessory . . . ,4-16

Figure 4-14. A Typical SSH-8 Application ,4-16

Figure 4-15. Attaching an SSH-4/A Accessory. . . . . ,4-17

Figure 4-16. Attaching SSH-8 Accessories ,4-18

Figure 4-17. Attaching SSH-8 and STA-16 Accessories, . . .4-19

Figure 4-18. Typical Measurement and Control Application .4-20

Figure 4-19. Attaching an MB01 Backplane.. . . . . .4-21

Figure 4-20. Attaching Multiple MB02 Backplanes .4-22

Functional Block Diagram. . . . . . . .2-2

Expanding the Analog Inputs of DAS-1200 Series

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

Timing Relationships of Conversion Modes. ,2-7 Default Switch Configuration for DAS-1200 Series

Boards.................................3-14

Gain Selection Switch as Viewed Through Mounting Flange . .3-15 Base Address, Clock Select, and Wait State Enable Switch .3- 17 Attaching an STC-37 Screw Terminal Connector. 4-3 Pin Assignments of the Main I/O Connector (Jl) .4-4

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

Cabling and Connections for Attaching an STA-16 .4-7

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

Cabling and Connections for Attaching

anSTA-U................................4-8

STA-U Terminal Names .4-9 Pin Assignments of PI0 Cable Connector (54). .4-10

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

Accessory. . . . . .4- 11

an STA-16 or STA-U . .4-15

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Figure 4-21. MB02 I/O Connections . . . .4-23

Figure 4-22.

Figure 4-23. Three Methods for Wiring Differential Inputs .4-28 Figure 4-24.

Figure 4-25. Differential Input Configuration with Figure B-l.

Figure B-2. Figure C-l. Figure C-2.

List of Tables Table 1. Table 2.

Table 2-l.

Table 2-2.

Table 3-1.

Table 3-2.

Table 3-3.

Table 3-4.

Table4-1.

Table 4-2.

Table 4-3.

Table 7- 1.

Table A-l. Table A-2.

Table A-3. Table A-4.

Table A-5. Table A-6.

Table C-l. Table C-2. Table C-3.

Connections for Wiring a Signal Source to a

DAS- 1200 Series Board Configured for

Single-Ended Inputs . . .4-26 A Differential Input Configuration that Avoids a

Ground Loop . .4-30

a Ground Loop. . . .4-30

Pin Assignments of Main I/O Connector (Jl)

on DAS-1200 Series . .B-2

Pin Assignments of PI0 Cable Connector (34). .B-3

Analog Trigger Conditions . .C- 18

Using a Hysteresis Value. . . .C- 19

Finding Information.

Related Documents ........................

DAS-1201 Gains, Ranges, and Throughput Rates DAS-1202 Gains, Ranges, and Throughput

Rates ..................................

...................................

Default Configuration File Settings. Standard Address Assignments, Standard Interrupt Request (IRQ) Assignments .3-l 1 Gain Selection Switch Positions EXP-16 andEXP-16/A Terminal Names

EXP-GP Terminal Names .................

MB Series Backplanes.

Troubleshooting Information.

Analog Input Specifications Digital I/O Specifications (X-bits on Main Connector). Digital I/O Specifications (24-bits on PI0 Cable

Connector) ..............................

Programmable CounterDimer Specifications. Power Supply Requirements. Environmental Specifications

Supported Gains and Gain Codes Logical and Physical Channels Pseudo-Digital Output Channels

(Burst / SSH Mode). ......................

..............................

........................

..........

............

...................

...............

................

...............

............

..............

xiii 2-5

.2-6 .3-7

.3-10 .3-16

..... .4-11

.4- 12 .4-21

.7-Z

A-l A-3 A-4

.. A-4

A-5

A-5 .C-6 .C-7

.C-9

..i

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Table C-4. Default Settling Times. ...................

Table C-5. Table C-6. Pseudo-Digital Output Channels

Table C-7. Digital I/O Channel Usage; Table C-X. Digital I/O Channel Usage: Table C-9. Digital I/O Channel Usage:

Table C-10. Digital I/O Channel Usage; Table C- 11. Digital I/O Channel Usage; No EXPs

Table C-12. Digital I/O Channel Usage; EXPs Used

Table C-13. Counter/l’imer Functions. ................. .C-25

Table C-14. Interrupt Vectors Table C-15. Error Messages

Table E-l. Register-Level Address Map. ...............

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

Table E-5. Counter~imer Address Map. .............. .E- 14

Table E-6. Table E-7. 82C54 Counter/Timer Control Register:

Table E-8. 82C54 Counter/Timer Control Register: Table E-9.

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

Table E- 11. Mode Selection for Ports A and CH Table E- 12. PI0 Control Word

Common Settling Times (Analog Trigger) No EXPs, All Ports Output

EXPs Used, All Ports Output ..............

No EXPs, A and B Output, CL and CH Input. .C-23 No EXPs, B and CH Output, A and CL Input. .C-23

Bits4,5,&6.,

82C54 Counter/Timer Control Register:

Selecting Functionality ................... .E-20

Bits4and5.............................E-2 0

Readback Command .....................

Counter Status Byte Selection: Bits 0, 1, & 2 .. .E-23

........................

.........................

..................

................

........

......

.........

.......................

.C- 12 .C- 13

.C- 15 .C-21 .C-22

.C-24 .C-24

.C-26

.C-27

.E-2

.E-7

..E- 9

.E-22

.E-26 .E-27

1200ugtoc Page x Tuesday, June 7, 1994 lo:46 AM

reface.frm Page xi Tuesday, June 7, 1994 IO:48 AM

:/.:.:/.:.:,:;:~:.:.:.:.:.:.:.:~:~:.:.:~:.;.:.:.;.:.:.:.~:.:.:.:.:.:.:.~.:.~.:.:.:.~.:,:.:.:.:.:.:.:.

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

To follow the information and instructions contained iu this manual, you must he familiar with the operation of an IBMTM PC/XT or compatible in

the MS-DOS@ or WindowsTM environment. You must also he familiar with data acquisition principles and their applications.

Preface

Manual Oraanization

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

Table 1. Finding Information

To learn more about See

The capabilities of DAS-1200 Series hoards

what accessories we available for the boards Chapter 1

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

:~:.;.:~:.j:::.:,:.:.:.:,:.:.:.:.:.:/~:.:.~.:,:~:.: .../ ~;...:,:.:.:.:.;:/.: ..~.....~.... ...,.,.,.,.....,..i....i. :.:.:/

Installing the DAS-1200 Series standard software package

How to create a configuration file Chapter 3

..,...........~........,..~..,.,.................,.

Chapter 1

:~:.;.:~:.;.:.:.-:...::::.i:i.:,:.:.:i::::)::::o::-:~..~..:

Chapter 3

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The register-level I/O map Appendix E

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Related Documents

Page xiii Tuesday, June 7, 1994 lo:48 AM

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

Table 2. Related Documents

1 DAS-1600/1400/1200 Series Function Call Driver User’s Guide

I MB Series User’s Guide

Document

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hapOl_.frm Page 1 Tuesday, June 7, 1994 10:4X AM

The DAS-1200 Series is a family of high-performance analog and digital I/O boards for IBM PC/XT, PC AT, and compatible computers. The DAS-1201 is a high-gain board, while the DAS-1202 is a low-gain board.

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

Overview

Features

The DAS-1200 Series features are as follows:

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

Analog inputs are bipolar with a maximum range of f5 V. The gain applied to analog input channels is switch-configurable. The

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

Analog inputs are sampled with 12-bit resolution at a maximum of 50 ksamples/s for the DAS-1201 and 100 ksamples/s for the DAS-1202.

The base I/O address and Direct Memory Address (DMA) channel

are switch-configurable; interrupt~levels are software-configurable. Burst mode sampling capability emulates simultaneous

sample-and-hold (SSH) operation,

l-l

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

following methods:

software command

onboard pacer clock

external pacer clock

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

supported.

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

- program control

- interrupt service routines

DMA transfer

. The boards perform X-bit data transfers on the ISA bus. . A 3-channel programmable counter/timer (SZC54) 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 DAS-1200 Series boards provide a total of 32 bits of digital I/O. Four unidirectional digital inputs and four unidirectional digital outputs are provided on the main I/O connector; 24 bits of bidirectional digital I/O are provided on the PI0 cable connector (54). These 24 bits are configured as two S-bit ports and two 4-bit ports that can be set independently for input or output.

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

. The boards are backwardcompatible with the DAS-16 and DAS-16F

boards. Programs for the DAS-16 and DAS-16F run on the DAS-1200 Series without modification.

1-2

Overview

hapOlL.frm

Supporting Software

Page 3 Tuesday, June 7, 1994 10:4X AM

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

The following software is available for operating DAS-1200 Series boards:

. DAS-1200 Series standard software package-This package, which

comes with the board, is provided on 3.5~inch and 5.25~inch diskettes. The package includes function libraries for writing application programs under DOS using Microsoft@ QuickBasicTM, Microsoft’ Professional Basic, or Microsoft@ Visual BasicTM for DOS. The package also includes support files, example programs, and the following utility programs:

Con&mtion

is a DOS-based program for creating or modifying a DAS-1200 Series configuration file.

A configuration file contains the settings used by the DAS-1600/1400/1200 Series Function Call Driver and other driver software for configuring a board. For more information on the configuration utility, refer to “Creating a Configuration File” on page 3-6.

Calibration

DOS-based program for calibrating the analog input circuitry of DAS-1200 Series boards. For more information on the calibration utility, refer to Chapter 6.

Control Panel

DOS-based stand-alone program. This tool provides access to all DAS-1200 Series board operations without programming.

The Control Panel provides a means of testing the board and your application; it is also a means of performing simple applications and saving data to a disk file. Refer to Chapter 5 for more information about the Control Panel.

Utility - The configuration utility (CFG1600,EXE)

Utility - The calibration utility (CAL1200,EXE) is a

- The Control Panel (CTL1600.EXE) is a

l-3

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DAS-1600 External Driver -

The External Driver (DAS1600.EXE) for DAS-1600, DAS-1400, and DAS-1200 Series boards provides control and communication between data acquisition and analysis packages and the boards.

DAS 1600.EXB executes as a terminate-and-stay-resident (TSR) program that occupies a small amount of memory in the host

ASO- - Advanced Software Option. This option includes both

Windows and DOS versions; both versions are supplied on 3.5~inch

and 5.25-inch diskettes. The ASO- include function libraries for application programs that you write for MS-DOS and Windows

environments in the following languages:

- Microsoft and Borland’ C/C++

- Borland Turbo Pascal@

- Microsoft Visual Basic for Windows

- Microsoft Quick@

- Microsoft Visual C++TM Refer to

Guide

the DAS-160011400/1200 SeriesFunction Call Driver User’s

for more information,

The ASO- 1200 software package also contains miscellaneous support

files. example programs, and t,he following:

Confgurution Utility

-The configuration utility (CFGl600,EXE)

is a program for creating or modifying a DAS- 1200 Series

configuration file.

A configuration file contains the settings used by the

DAS-1600/1400/1200 Series Function Call Driver and other driver software for configuring a board. For more information on the configuration utility, refer to “Creating a Configuration File”

on page 3-6.

1-4 Overview

@ I hapOl_.frm Page 5 Tuesday, June 7, 1994 lo:48 AM

- Calibration Urility

DOS-based program for calibrating the analog input circuitry of the DAS-1200 Series boards. For more information on the calibration utility, refer to Chapter 6.

Control

supplied in a DOS version (CTL1600.EXE) and a Windows version (CTLl600W.EXE). This program provides access to all DAS-1200 Series operations without programming.

Control Panel operations include acquiring analog inputs and controlling digital I/O. The Contxol Panel provides a means of testing the board and your application; it is also a means of performing simple applications and saving data to a disk tile.

The Windows version allows you to graphically represent up to eight analog inputs and transfer acquired data to other Windows

applications through the Windows Dynamic Data Exchange (DDE) feature. Refer to Chapter 5 for more information on the Control Panel.

- Port I/O environment, you can use the Port I/O (PIO) software to program DAS-1200 Series boards at the register level using I/O

instructions. Refer to the PORTIO.TXT file for more information.

Panel The Control Panel is a stand-alone program

software

- The calibration utility (CAL1200.EXE) is a

- If you are programming in the Windows

VDAS-1600 - VisualDASTM Custom Controls for Visual Basic for Windows. VisualDAS simplifies the setup of data acquisition operations. The package includes a comprehensive user’s guide, offers extensive online help, and furnishes software on 3.5.inch and

5.25-inch diskettes.

. Data acquisition and analysis application software VIEWDAC@,

EASYEST LX@, and EASYEST AC? are integrated software packages available for DAS-1200 Series boards. Programming tools,

such as ASYST@ scientific and engineering programming language, are also available to help you in writing your application progratns.

1-5

hapOl_.frm Page 6 Tuesday, June 7, 1994 lo:48 AM

Note: If you use VIEWDAC, EASYEST LX, EASYEST AG, or ASYST to program your DAS-1200 Series board, you must use the DAS-1600 External Driver. This driver is included in the DAS-1200 Series standard software package ,and is described in Appendix C.

Other data acquisition and analysis packages include the following:

- SNAP-MASTER - Data acquisition and analysis package from H.E.M. Data Corporation (only available for Windows).

NOTEBOOKINOTEBOOKpro - Menu-driven data acquisition and analysis from Laboratory Technologies Corporation (available for both DOS and Widows).

STREAMER - Menu-driven data acquisition software for high-speed transfers of DAS-1200 Series data to a hard disk (only available for DOS).

Accessories

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

STA-16 - Screw terminal adapter accessory. You can use this accessory to connect signals from the main I/O connector (Jl) to screw terminals.

STA-U - Universal screw terminal accessory. You can use this

accessory to connect interface signals from the PI0 cable connector

(54) to screw terminals. . STC-37 - Direct DAS-1200 Series board to screw terminal interface. . STP-37 - Screw terminal panel with a 37-pin D-type connector.

. ISO- - 4-channel isolated expansion multiplexer. . SSH-4/A - 4-channel simultaneous sample-and-hold accessory,

1-6

Overview

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. SSH-8 - X-channel simultaneous sample-and-hold accessory. . MB Series modules and backplanes - Plug-in, isolated,

signal-conditioning modules and the backplanes that hold them,

. EXP-16 and EXP-16/A - 16-channel expansion multiplexer and

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

s EXP-GP - g-channel signal conditioning accessory with Wheatstone

bridge and RTD interface: requires the S-1600 cable.

1-7

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4 hap02-.frtn

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Functional Description

This chapter describes the following features of DAS-1200 Series boards: . Analog input features . Digital I/O features . 82C54 counter/timer features

. Wait state selection . Power Together with the DAS-1200 Series block diagram shown in Figure 2-1,

these descriptions are offered to familiarize you with the operating options and to enable you to make the best use of your board.

2-l

hap02Lfrm

Analocg Input Features

Differential/Single-Ended Selection

Page 3 Tuesday, June 7, 1994 lo:50 AM

The analog input section of a DAS-1200 Series board multiplexes all the

active input channels (up to 16 single-ended or eight differential) down to a single, 12-bit sampling analog-to-digital converter (ADC).

DAS-1200 Series boards operate in bipolar input mode only. Bipolar

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

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

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 non-ground common mode. You want to use single-ended inputs for high-level signals whose noise component is not significant.

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

Channel Selection in Expanded Configurations

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

2-3

+b-

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When you daisy-chain expansion accessories from the analog inputs, it is recommended that the first expansion accessory multiplex onboard channel 0, the next expansion accessory multiplex channel 1, and so on.

Selection of an onboard channel is made via jumper settings on the

expansion accessory.

You can access any unused onboard channels by including an STA-16

screw terminal accessory in the daisy-chain configuration. Figure 2-2

illustrates how expansion boards and accessories interface with the analog

chamlels of DAS-1200 Series boards.

DAS-1200 swbs Boards

2-4

Expansion

select Lines (OPO to 3)

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

Channel

You can also use up to four MB02 backplanes to increase the number of

available channels to 64 isolated or 12 non-isolated. For more information about connecting channel expansion boards, refer to Chapter 4.

EXP.lWA

Functional Description

hap02-.frm Page 5 Tuesday, June 7,1994 lo:50 AM

Notes: You must specify a single-ended input configuration for all

onboard channels associated with channels on MB02 backplanes.

If you are using EXP-16, EXP- 16/A, or EXP-GP expansion accessories or

MB Series backplanes, the digital output lines of the DAS-1200 Series

board select a particular channel on the expansion accessory or backplane

to read.

Gain Selection

The switch-configurable gain that you select is applied to an incoming

signal as a multiplication factor; gain allows you to amplify a signal to a

range that the ADC can accurately measure.

For example, if the ADC handles signals in the f5 V range and you want

to measure a signal in the range of f0.5 V, you would use a gain of IO to amplify the signal to the f5 V range. Similarly, if you wanted to measure a signal

that was already

in the f5 V range, you would select a gain of 1.

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

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

Maximum Throughput

Gain

Input Range

Rate

2-5

.frm Page 6 Tuesday, June 7,1994

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

Gain

~~:~~~~:~~ ~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~:

:j:.:.:.:.:,: ..,.....,.......

lo:50 AM

Input Range

Maximum Throughput Rate

f ../ .,./, I .,.,.,.,...,.,..i.,..i....i...

f2.5 V

~..~.~~.~.~.~.~.~.~.: ..,. I ..,./,.,.,.,./,, ,,, /..

100 ksamplesh

.../..../ .,..~../......

Conversion Modes

DAS-1200 Series boards support the following conversion modes: . Paced mode -Paced mode is the default data conversion 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 being sampled.

. Burst mode In burst mode, each pulse from the pacer clock begins a

scan of one to sixteen channels. The conversion rate during a burst

mode scan is equal to the rate of the burst mode conversion clock.

The sample rate, which is the rate at which a single channel is sampled, is equal to the pacer clock rate.

DAS-1200 Series software allows you to program the pacer clock to

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

+0.625 V

100 ksamplesh

Z-6

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

Functional Description

hap02Lfrm

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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.

Pacar Clock

Paced Mode Convsmions

Bun, Mode ConversIons

Burst Mode ConversIon Clock

Figure 2-3. Timing Relationships of Conversion Modes

Clock Sources

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

Series boards: . Software DAS-1200 Series boards allow you to acquire single or

multiple samples under program control.

. Hardware (internal clock source) The internal pacer clock is

derived from the onboard 82C54 counter/timer and a

switch-configurable, crystal-controlled 1 MHz or 10 MHz timebase. The pacer clock uses two cascaded counters of the 82C54. The maximum allowable rate is 100 ksamples/s (for the DAS-1202) or 50 ksamplesls (for the DAS-1201).

ch4

ch4 ch5 cl,6 ch7 ch4 ch5 ch6 cl17

ch5

rlnrln

2-7

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The minimum conversions per hour is determined as follows:

1OMHr

232

__ = 2.328 x IO-?= 8.38

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

. Hardware (external clock source) -The external pacer clock source

must be an externally applied, TTL-compatible, rising-edge signal

attached to the IPO/TRIG O/XPCLK pin (25) of the main I/O

connector (Jl).

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

Notes: The ADC on the DAS-1202 acquires samples at a maximum of

100 ksamples/s (one sample every 10.0 ys); the ADC on the DAS-1201

acquires samples at a maximum of 50 ksamples/s (one sample every

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

IMHZ

232 = 2.32Xx104=

0.838

Triggers

2-8

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

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

. Internal - When you enable the analog input operation, conversions

begin immediately.

Functional Description

hap02Lfrm Page 9 Tuesday, June 7,1994 lo:50 AM

. External Analog - While

of the DAS-1200 Series boards, you can program an analog trigger using one of the analog input channels as the trigger channel. The DAS-1600/1400/1200 Series Function Call Driver provides functions for an analog trigger; refer to the

Function

External Digital - While a digital trigger is not a hardware feature of the DAS-1200 Series boards, you can program a digital trigger using one of the digital input channels as the trigger channel. The

DAS-1600/1400/1200 Series Function Call Driver provides functions for a digital trigger: refer to the

Cull Driver

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

Call

Driver

User’s

Positive-edge trigger

the trigger signal.

Negative-edge trigger

the trigger signal.

Positive-level trigger

above a positive level. See Table A-2 on page A-3 for logic levels.

Guide

analog trigger is not a hardware feature

DAS-1600/1400/1200 Series

User’s

Guide

for more information.

DAS-J600/J400/1200 Series Function

for more information.

Conversions begin on the rising edge of

- Conversions begin on the falling edge of

- Conversions begin when the signal is

Negative-level trigger

below a negative level. See Table A-2 on page A-3 for logic levels.

Data Transfer Modes

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

. Single mode - In 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.

- Conversions begin when the signal is

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. Synchronous - In 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 Windows environment 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.

DAS-1200 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.

Generally, if you are programming an operation in the Windows Enhanced Mode, you should use DMA to acquire data reliably at maximum board speeds.

Digital I/O Features

DA%1200 Series boards contain 32 bits of digital I/O. Four unidirectional digital inputs (IPO to IP3) and four unidirectional

digital outputs (OPO to OP3) are accessible through the main I/O connector (Jl).

Z-10

Functional Description

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24 bits of bidirectional digital I/O are available on the PI0 cable connector (54). These 24 bits are configured as two 8-bit ports (A and B)

and two 4-bit ports (CL and CH) that you can set independently for input

or output.

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-2 on page A-3

for logic levels). The digital inputs are compatible with TTL-level signals.

These inputs are provided with 10 kn pull-up resistors to +5 V; therefore,

the inputs appear high (logic 1) with no signal connected.

You can use the digital inputs and outputs for any general-purpose task

except the following:

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

digital input line IPl/KTRIG to attach the trigger and digital input

line IP2/CTR O/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 IPOFRIG O/XPCLK to attach the external pacer clock signal; in this case, you cannot use IPO/TRIG O/KPCLK 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 and write a single value from and to a DAS-1200 Series board using synchronous mode or single mode. You can read and write multiple values from and to a DAS-1200 Series board using synchronous mode or interrupt mode.

Counter/Timer Features

The DAS-1200 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.

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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 the Function Call Driver.

Note: Attempts to combine register-level programming of counter/timer functions with Function Call Driver programming can produce unexpected results because the Function Call Driver relies on structures it

sets up.

You can use software to select IPOlrRIG O/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 IPO/TRIG O/XPCLK goes high.

Wait State Selection

Although most current-generation PCs and compatibles extend bus cycles during 8-bit data transfers, the DAS-1200 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 also maintains backward compatibility with DAS-16 and DAS16F Series boards that may be used in early generation machines.

Power

+5 V power is available from the main I/O connector (Jl). The +5 V

supply is brought out from your host computer.

2-12 Functional Description

hap03-km Page 1 Tuesday, June 7,1994 2:57 PM

Setup and Installation

This chapter describes inspection, software installation, configuration, and hardware installation for DAS-1200 Series boards.

Read this chapter before you attempt to install and use your DAS-1200 Series board.

Inspecting Your Package

Caution: A discharge of static electricity from your hands can seriously damage certain electrical components on any circuit board. Before handling any board, discharge static electricity from yourself by touching a grounded conductor such as your computer chassis (your computer must be turned off). Whenever you handle a board, hold it by the edges and avoid touching any board components, cable connectors, or gold-plated edge connectors.

Use the following procedure to unwrap and inspect a DAS-1200 Series board:

1. Factory packaging of the DAS-1200 Series board includes a final wrap of protective, anti-static material. Remove the board from its anti-static wrapping material. You may wish to store the wrapping material for possible future use.

2. 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).

3-l

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Page 2 Tuesday, June 7,1994 1052 AM

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

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

Note:

further adjustment prior to installation. If at a later time you decide to recalibrate the board, refer to Chapter 6 for instructions.

Data acquisition products are factory calibrated; they require no

Installing the Software Package

This section provides installation procedures for the DAS-1200 Series standard software package and the ASO- software package. Before you work with the software from any package, make a copy of all diskettes in the package. Use the copies as your working diskettes, and store the originals as backup diskettes,

Installing the DAS-1200 Series Standard Software

The DAS-1200 Series standard software package is for the DOS environment only. Use the following procedure to install this package:

1. Insert diskette #l into an appropriate floppy-disk drive of your computer.

2. Change to the drive containing the diskette and enter the following at the DOS prompt:

3. Respond to the installation program prompts.

4. When the installation program requests a designation for the drive that is to receive your software, enter a designation of your choosing or defer to the default designation of C.

3-2 Setup and Installation

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5. When the installation program requests a name for the directory that is to receive the software, enter a name of your choosing or accept the default name.

The installation program automatically creates a hierarchical directory tree on the specified drive and then copies all files, expanding any compressed files, to the new directory.

6. Insert any additional disks, as required by the installation program.

The installation program notifies you when it completes the installation

After the installation, you may want to review the following files:

README.TXT - An ASCII text file containing information

available after the publication of this manual.

EXAMPLEKTXT - An ASCII text file containing notes and tips on how to successfully compile and execute the supplied example programs.

FILES.TXT - An ASCII text file that lists and describes all the files that can be installed.

Installing the ASO- Advanced Software Option

The ASO- 1200 advanced software option contains software for both the

DOS and Windows environments. This section contains procedures for

installing both versions.

DOS Installation

Use the following procedure to install the DOS version of the ASO-

software package:

I. Insert diskette #l into an appropriate floppy-disk drive of your

computer.

2. Change to the drive containing the diskette and enter the following at the DOS prompt:

INSTALL

3-3

hap03Lfrm Page 4 Tuesday, June 7, 1994 lo:52 AM

3. Respond to the installation program prompts.

4. When the installation program requests a designation for the drive that is to receive your software, enter a designation of your choosing

or defer to the default designation of C.

5. When the installation program requests a name for the directory that is to receive the software, enter a name of your choosing or accept the default name.

The installation program automatically creates a hierarchical

directory tree on the specified drive and then copies all files,

expanding any compressed files, to the new directory.

6. Insert any additional disks, as required by the installation program

The installation program notifies you when it completes the installation. After the installation, you may want to review the following files:

README.TXT An ASCII text file containing information available after the publication of this manual.

EXAMPLES.TXT - An ASCII text file contahiing notes and tips on how to successfully compile and execute the supplied example programs.

. FILES.TXT - An ASCII text file that lists and describes all the files

that can be installed.

Windows Installation

Use the following procedure to install the Windows portion of the

ASO- software package:

1. Insert diskette #l into an appropriate floppy-disk drive of your computer.

2. Enter the Windows environment.

3. From the Program Manager File menu, select Run.

3-4

Setup and Installation

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4. In the Command Line text box, type the letter of the drive containing your Windows diskette and follow with diskette is in drive B, type the following:

B : SETUP

5. Select OK.

6. Respond to the installation program prompts.

7. When the installation program requests a designation for the drive that is to receive your software, enter a designation of your choosing or defer to the default designation of C.

8. When the installation program requests a name for the directory that is to receive the software, enter a name of your choosing or accept the default name.

The installation program automatically creates a hierarchical directory tree on the specified drive and then copies all files, expanding any compressed files, to the new directory.

SETUP.

For example, if your

The installation program also creates a DAS-1600 program manager

group containing icons for all DAS-1200 programs and information files.

Y. Insert any additional disks, as required by the installation program.

The installation program notifies you when it completes the installation

After the installation, you may want to review the following tiles:

README.TXT An ASCII text file containing information available after the publication of this manual.

EXAMPLES.TXT - An ASCII text file containing notes and tips on how to successfully compile and execute the supplied example programs.

FILES.TXT - An ASCII text tile that lists and describes all the files that can be installed.

3-5

& hap03-.frm Page 6 Tuesday, June 7, 1994 1052 AM

Creating a Configuration File

The configuration file contains a list of the configuration options and a

setting for each. The file is used by application packages such as VIEWDAC Function Call Driver. When you set up software to operate your DAS-1200 Series board, you specify the name of the configuration file.

The switch-configurable options that you enter into the configuration file are also used to create a graphic representation that you can use as a reference when you set up switches on your board. Setting switch-configurable options is discussed under “Setting Switch-Configurable Options” on page S-14.

The configuration file you specify can be either the default configuration file or a tile you create with the configuration utility. The following

sections describe the default configuration file and the configuration

utility.

and

EASYEST LX as well as programs written using the

Default Configuration File

A default configuration tile called DAS 1600,CFG is provided in both the DAS-1200 Series standard software package and the ASO- software package. The default configuration file contains an ASCII list of the configuration options that apply to a DAS-1602 board.

Table 3-1 lists the configuration options and the default settings.

3-6

Setup and Installation

hap03-.frm Page 7 Tuesday, June 7, 1994 1052 AM

Table 3-1. Default Configuration File Settings

If the default settings meet the needs of your application, refer to

Figure 3-1 on page 3-14 to visually verify the default switch-configurable

options and then go on to “Installing the Board” on page 3- 18. If you have to change the default configuration file settings, refer to the next

subsection.

Configuration Utility

The configuration utility, CFG1600.EXE, is furnished in both the

DAS-1200 Series standard software package and the ASO- software

package.

3-7

hap03-.frm Page 8 Tuesday, June 7,1994 lo:52 AM

This utility enables you to modify an existing configuration file or to create a new configuration file for up to two boards. To modify or create a

configuration file, use the following procedure:

1. Start the configuration utility from DOS or Widows as follows:

From DOS, change to the directory containing CFG1600.EXE

and enter the following at the DOS prompt:

CFG1600

where the optional <filename> is the name of the configuration file you want to modify or create. If the file is not located in your default directory, include its full pathname.

From

Windows,

Enter the following in the Command Line dialog box, and select

OK.

path

where path is the complete path to CFG 1600EXE and the optional wish to modify or create. If the file is not located in your default directory, include its full pathname.

Whetherfilename is an existing file in the directory containing

CFGl600,EXE or a tile to be created, it is the name displayed by the configuration utility’s opening screen. However, the settings displayed forfilename may differ as follows:

Iffilename is an existing file, the configuration utility displays the settings contained in this existing file.

<filename.~

select Run from the Program Manager File menu.

CFG1600

<filename

filename

is the name of the configuration file you

3-8

Iffilename is a file to be created, the configuration utility displays the default configuration settings.

If no entry was made forfilename, the configuration utility displays the default configuration file DASl600.CFG.

Setup and Installation

hap03-.frm Page 9 Tuesday, June 7, 1994 lo:52 AM

Note: If you alter the default configuration file, you should rename it and then create a new default configuration file by starting the configuration utility with nofilename and saving the results without change.

2. In the opening screen, enter the number of boards you plan to configure (1 or 2).

After you make this entry, the utility program displays the configwation window for the first board (board 0, which is shown in the upper-left comer of the window). The window contains the following configuration options:

Eourd name -This option identifies the board you are installing. You can select one of the following:

DAS-I601 DAS-1401 DAS-1201

DAS-1602

Ruse address -This option requires selection of a 3-digit hexadecimal address. The addresses you can select range from 20011 to 3FOh. Base addresses presented for selection begin on even boundaries that increment by 16 (OOFh).

When selecting a base address, do not select an address that conflicts with one already in use. Table 3-2 lists standard address

assignments and their corresponding devices.

DAS-1402 DAS-1202

3-9

& k hap03-.frm Page 10 Tuesday, June 7, 1994 1052

Table 3-2. Standard Address Assignments

3-l 0

330 - 377 Available

Notes ’ These addresses are slightly different in the IBM PC AT.

Clock Select This option is a choice between a 1 MHz or

10 MHz clock.

Wuit Stute

A/D

single-ended.

D/A 0 Mode

D/A 1 Mode

- This option is a choice between yes and no.

Mode

- Not applicable to DAS-1200 Series boards.

config - This option is a choice between differential and

- Not applicable to DAS- 1200 Series boards.

- Not applicable to DAS-1200 Series boards.

Setup and Installation

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Page 11 Tuesday, June 7,1994 lo:52 AM

D/A 0 Reference

D/A

I Reference -Not applicable to DAS-1200 Series boards.

DMA channel

and 1.

IRQ

level This option selects an interrupt level from 2 through

7. Table 3-3 lists the standard interrupt reyuest assignments.

Table 3-3. Standard Interrupt Request (IRQ) Assignments

Not applicable to DAS-1200 Series boards,

-This option is a choice between DMA channels 3

I lnterrwt Level

IRQ2

Digital CFG

select either input or output for the digital ports A, B, CL, and CH.

Number EXP-16s

and EXF-16/A expansion multiplexer/amplifiers that you are going to install. You can select from 0 to 8 EXP-16s. When a value other than 0 is selected, the

applicable.

EXP-16 Gains

gain that you set for each channel of the EXP- 16s you are installing in your system.

The option displays a menu that allows you to

- This option specifies the switch-configurable

I Use 1 Reserved (XT), IRQ 8 to IS (AT) /

This option specifies the number of EXP-16

EXP-16 Gains

option is

Refer to the

Multiplexer/Amplifier System

EXP-I6 & EXP-16IA Expansion

UserS

Guide

for more information.

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hap03-.frm Page 12 Tuesday, June 7,1994 1052 AM

- Number EXP-GPs

general-purpose multiplexer and signal conditioning modules that you are going to install. You can select horn 0 to 8 EXP-GPs. When a value is applicable.

EXP-GP Gains

selects the switch-configurable gain multiplier that you set up for all EXP-GP channels. The factors you can choose from are Xl or

x2.5.

The second level menu selects the switch-configurable gain factor you are setting for each individual channel of the EXP-GP boards you are installing in your system.

Refer to

Guide

CJR Channel suggested that

circuit of the EXP-GP: this option selects the channel that you are connecting the CJC sensor to.

Number

simultaneous sample-and-hold boards that you are installing in

your system. You can select a maximum of four when you are

installing SSH-4/A boards and a maximum of two when installing SSH-8 hoards.

the EXP-GP Signal Conditioning Multiplexer lJser’s

for more information.

SSHs

-This option specifies the number of EXP-GP

other than 0

-This option displays two menus. The first men”

If your application uses thermocouples, it is

you use the cold-junction compensation (CJC)

- This option specifies the number of

is selected, the

EXP-GP Gains

option

3-12

SSH

Type - This option is a choice between SSH-4/A and SSH-8

simultaneous sample-and-hold boards.

Warning:

IO MHz clock (in the Clock for use with an SSH-8 causes the Function Call Driver and the DAS-1600 External Driver to report an error (28714) and terminate.

When you select SSH-8 as an

Select

SSH

Gains - This option specifies the switch-configurable gains

that you set up for each channel of your SSH-4/A or SSH-8.

SSH Type, you

option). Selecting a I MHz clock

Setup and Installation

must select a

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Page 13 Tuesday, June 7, 1994 lo:52 AM

SSH 4/A Mode

modes.

- This option is a choice between master and slave

- SSH

3. To change the setting for a configuration option, use the arrow keys to highlight the option and press [inter] to display a list of option

settings. Use the arrow keys to highlight the required setting and then

press [Enter] to select the setting. These instructions are

summarized in the Commands/Status box at the bottom of the screen.

4. When you complete your selections for a board, you can view a

graphic representation of the switch positions that correspond to the options you have selected by pressing [s] for “Show Switches”.

You can use this graphic representation to set up and verify the switch-configurable options that you have selected. If you have any questions or require additional information, refer to “Setting Switch-Configurable Options” on page 3-14.

Timing

external. Refer to the

information.

A/D Gain

DAS-1200 Series board. For more information, see “Setting the Gain Selection Switch” on page 3-15.

-This option is a choice between internal and

SSH-4A User’s Guide

- This option specifies the gain that you set up on the

SSH-8 User’s Guide

for more

5. If you are configuring more than one board, press

Board” to display the menu box for the next board.

6. When you complete the changes for all boards, press [ESCI

7. The configuration utility asks whether to save the changes. Press

for yes or

ENI

for no.

[Nl

for “Next

3-13

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Setting Switch-Configurable Options

Page 14 Tuesday, June 7, 1994 1052 AM

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.

If you are using a board configuration other than the default, you must generate a configuration file with the configuration utility. You can use the utility’s representation of switch positions for the options you have selected.

Figure 3-l shows the switches for DAS-1200 Series boards, The remaining sections describe the switches and how to configure them.

[Show Switches1

command to generate a graphic

Gain Selection Switch

WAIT(W): UP = OFF DN E ON CLOCK(C): UP = 1 MHz DN = 10MHz

Figure 3-1. Default Switch Configuration for DAS-1200 Series Boards

TP;

3-14

Setup and Installation

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Setting the Gain Selection Switch

Switch S2 on the DAS-1200 Series selects the gain that you want applied to all of your analog input channels.

Note:

not have to reset or power-up the board to apply the change in gain to analog input channels.

through the rear mounting flange.

Switch S2 is a direct input to the instrumentation amplifier. You do

Figure 3-2 shows the 3-position gain selection switch that is set up

board

is a 3-position switch that

Figure 3-2. Gain Selection Switch as Viewed Through Mounting Flange

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Table 3-4 lists the switch positions for each of the gains available.

Table 3-4. Gain Selection Switch Positions

Setting the Chan 8/16 Switch

Setting an Alternate Base Address

Switch Sl on the DAS-1200 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.

Switch S3 on the DAS-1200 Series is a single, X-position DIP switch that accommodates the base address, the clock select, and the wait state enable parameters. The default base address setting is 300h (768 decimal),

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

3-l 6

Setup and Installation

hap03-.frm Page 17 Tuesday, June 7,1994 10% AM

A$p

A8 A9

Note that a switch in the ON position outputs a logic 0. ,:si i,“,i;,” w

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

The base address is read from the S-position DIP switch located as showo

in Figure 3-1 for a DAS-1200 Series board. The base address switch 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-1600/1400/1200 Series board), you must reconfigure the base address switch.

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

Hex

Value ValLE

80 128

100

200

Decimal

::i

On = 1

CLK SEL Off = 10 MHz

WAITEN On = No

Off = Yes

MHz

1. Select ao alternate address that installed device. See Table 3-2 on page 3-10.

2. Use the configuration utility to create a new configuration file and view the corresponding switch settings in the menu-box diagram (see “Creating a Configuration File” on page 3-6).

3. Set up the base address switch to match the settings in the menu-box diagram.

Note:

shown by the switch diagram in the menu box of the configuratioo utility.

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

does

not conflict with another

3-17

hap03_.frm Page 18 Tuesday, June 7, 1994 lo:52 AM

+I+

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 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).

base

address switch (see Figure 3-3) enables

Setting the DMA Channel Select Switch

Switch S4 on the DAS-1200 Series is a 2.position slide switch that selects DMA channel 1 or 3. The default setting is 3.

installing

the Board

Caution:

your computer.

After reviewhig your computer manufacturer’s documentation for accessing computer internals, use the following steps to install a DAS-1200 Series board in an accessory slot of your computer:

Installing or removing a board while power is on can damage

3-18

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

Note:

allow for the power used by any other boards that may be in use. See

Table A-5 for DAS-1200 Series power requirements.

2. Remove the computer chassis cover.

You must observe the current-capacity limits of the PC supply;

hap03-.frm

Page 19 Tuesday, June 7, 1994 lo:52 AM

3. Select an unoccupied accessory slot, and remove the corresponding blank plate and retaining screws from the I/O connector panel. Save the retaining screws for re-use in later steps.

4. If your application uses the 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 24-bit digital I/O, connect the board end of the PI0 cable to the PI0 cable connector (54) on the DAS-1200 Series board. When connecting the cable, align the raised arrow of the PI0 cable with the arrow imprinted on the PI0 cable connector (54). Secure the mounting flange on the PI0 cable, to the connector panel next to the main I/O connector (Jl) with the retaining screws.

8. Replace the computer cover.

9. Turn on power to the computer.

You can use the Control Panel (see Chapter 5) to verify board operation. You are now ready to make I/O connections. Refer to Chapter4 for

descriptions of common I/O accessories and connections for DAS-1200 Series boards.

3-19

.frm Page 20 Tuesday, June 7,1994 lo:52 AM

hap04-.frm Page 1 Tuesday, June 7, 1994 lo:54 AM

Cabling and Wiring

In most applications, you use accessories to connect external I/O devices to the DAS-1200 Series boards. Accessories extend signals from the main I/O connector (Jl) to corresponding screw terminals of the accessory,

You access the 24 bits of parallel bidirectional digital I/O by using a flat ribbon cable known as the PI0 cable. The board end of the PI0 cable attaches to the PI0 cable connector (J4) on the DAS-1200 Series board. The other end of the PI0 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 (Jl). The PI0 cable comes with all DAS-1200 Series boards.

This chapter describes the cabling arid accessories required for attaching field wiring to your DAS-1200 Series boards,

Caution:

auy attached accessories before making connectious to DAS-1200 Series boards.

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

4-l

hap04-.frm Page 2 Tuesday, June 7,1994 lo:54 AM

Attaching Screw Terminal Connectors and Accessories

You can use the following screw terminal connectors and accessories to simplify connection of field wiring to DAS-1200 Series boards:

. STC-37 Screw Terminal Connector; your application may require two

connectors

. STP-37 Screw Terminal Panel; your application may require two

connectors . STA-16 Screw Terminal Accessory . STA-U Universal Screw Terminal Accessory The following sections describe how to attach these accessories to the

DAS-1200 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-1200 Series board. The acrew terminals accept wire sizes 12-22 AWG.

To connect an STC-37 to the main I/O connector (Jl) of a DAS-1200 Series board, directly attach the 37-pin connector on the STC-37 to the main I/O connector (Jl). Figure 4-1 illustrates the connection of an STC-37 to a DAS-1200 Series board.

Note:

connector (Jl) and connections to the PI0 cable connector (54). 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.

Your application may require connections to the main I/O

4-2

Cabling and Wiring

hap04-.frm Page 3 Tuesday, June 7, 1994 lo:54 AM

DAS-1200Serles board

src-37screw Terminal Connector

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

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 IPORRIG O/XPCLK, use screw terminal 25 to attach a digital signal to bit 0 of the standard digital input port.

4-3

hapOC.frm Page 4 Tuesday, June 7, 1994 lo:54 AM

Rear view

LL GND

ChO LO IN / ‘Ch6 HI IN

Chl LO IN I’Ch9 HI IN Ch2 LO IN /‘ChlO HI IN

Ch3 LO IN I ‘Chll HI IN Ch4 LO IN / l Chl2 HI IN

Ch5 LO IN / l Chl3 HI IN Ch6 LO IN / ‘Ch14 HI IN Ch7 LO IN / ‘Ch16 HI IN NOT CONNECTED NOT CONNECTED NOT CONNECTED

POWER GND

IP 1 I XTRIG IP 3 OPI OP3

CTR 0 OUT

+5VPWR

PIIll Pln 16 PIIll Pln 16 Pln 16 Pill 14

Pin 13 Pi” 12 Pi” 11 Pill 10

Pin 9 Pin 6

Pill 7 Pln 6 Pill 5

Plil 4 Pill 3

Pill 2

Pill 1

l . l . l . l . l . ’ . l .

l . ’ . ’ . ’ . l . l . l . l . l . l .

l . .

Phi 37 ChO HI IN PI” 36 Chl HI IN Pln 36 Ch2 HI IN

Pin 34 Ch3 HI IN

Pill 33 Ch4 HI IN

Pin 32 Ch5 HI IN Pill 31 Pill 30 Ch7 HI IN

Pill 29 LL GND Pin 26 LL GND

PI” 27 NOT CONNECTED Pin 26 PlII 26 IP 0 /TRIG 0 I XPCLK

Pln 24 IP 2 / CTR 0 GATE

Pin 23 OPO Pill 22 OP2 Pill 21 CTR 0 CLOCK IN

Pin 20 CTR 2 OUT

Ch6 HI IN

NOT CONNECTED

Figure 4-2. Pin Assignments of the Main l/O Connector (Jl)

When using an STC-37 to make connections to the bidirectional digital I/O, first attach the board end of the PI0 cable to the PI0 cable connector (J4) on the DAS-1200 Series board, then install the 37.pin D-type connector of the PI0 cable in the connector panel next to the main I/O connector (Jl) of the DAS-1200 Series board, and finally attach the second STC-37 to the 37-pin D-type connector of the PI0 cable. For more information about making

field

connections, see “Connecting Analog

Signals” on page 4-24.

4-4

Cabling and Wiring

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Page 5 Tuesday, June 7, 1994 lo:54 AM

Attaching an STP-37

The screw terminals on the STP-37 screw terminal panel allow you to connect field wiring to DAS-1200 Series boards. The STP-37 contains the following components:

37-pin male connector for cabling to the main I/O conneclor of a

DAS-1200 Series board.

. Labeled screw terminals for comtecting 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 (II) on the DAS-1200 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-1200 Series board.

DAS-1200 Series board

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

Figure 4-3. Attaching an STP-37

STP.37

4-5

hap04-.frm Page 6 Tuesday, June 7,1994 lo:54 AM

When using an STP-37 to make connections to the bidirectional digital I/O, first attach the board end of the PI0 cable to the PI0 cable connector (J4) on the DAS-1200 Series board, then install the 37-pin D-type connector of the PI0 cable in the connector panel next to the main I/O connector (Jl) of the DAS-1200 Series board, and finally attach the

STP-37 to the 37-pin D-type connector of the PI0 cable. See Figure 4-8

for the pin assignments of the PI0 cable.

Attaching an STA-16

The screw terminals on the STA-16 screw terminal accessory allow you to connect field wiring to DAS-1200 Series boards. The STA-16 contains the following components:

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

connector of a DAS-1200 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. You attach an STA-16 screw terminal accessory to the main I/O connector

(Jl) on the DAS-1200 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-1200 Series

board.

4-6

Cabling and Wiring

4 4

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Page 7 Tuesday, June 7,1994 lo:54 AM

Figure 4-4. Cabling and Connections for Attaching an STA-16

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

pin 1

Figure 4-5. STA-16 Terminal Names

4-7

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Page 8 Tuesday, June 7, 1994 lo:54 AM

Attaching an STA-U

The screw terminals on the STA-U universal screw terminal accessory allow you to connect field wiring to the DAS-1200 Series board PI0 cable connector (54). The STA-U contains the following components:

. A 37-pin male connector for cabling to the PI0 cable connector (J4). . Labeled screw terminals for connecting digital inputs and outputs.

These terminals accept wire sizes,l2-22 AWG.

. A breadboard area for user-installed circuitry.

First, attach the board end of the PI0

(54) on the DAS-1200 Series board. Next, install the 37.pin D-type

connector of the PI0 cable in the connector panel next to the main I/O connector (Jl) of the DAS-1200 Series board. Finally, attach connector 52 on the STA-U screw terminal accessory to the 37-pin D-type connector of the PI0 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.

Figure 4-6 shows how to attach an STA-U to a DAS-1200 Series board,

cable to the

PI0 cable connector

4-8

pin 1

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

pin 1

Cabling and Wiring

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Page 9 Tuesday, June 7, 1994 lo:54 AM

Figure 4-7 shows the screw terminal names on an STA-U. The screw

terminals map directly to the pins of the PI0 cable connector (54) shown in Figure 4-8.

Figure 4-7. STA-U Terminal Names

4-9

-&- hap04-.frm

Page 10 Tuesday, June 7, 1994 lo:54 AM

Rear view

Ph 19 Pi” 18

PI” 17 PI”16 Pi” 15 Pi”14

Pi”13 PI”12 Pill 11

PI”10 PI” 9 PI” 8

Pi” 7 Pin 6 Pill 5

Pin 4

Pi” 3

PI” 2

PI” 1

PORT B

DIGCOM. +sv

DIG. COM. NOT CONNECTED DIG. COM. NOT CONNECTED

DIG. COM. NOT CONNECTED DIG.COM. PBO

PBI

PB2

PB3

PB 4

PB5

PB6

PB7

NOT CONNECTED

\ ’ .

’ l

’ . l . l . l . l . * . l .

’ . l . * . l . l . l . l . ’ .

* .

Z--

37 PA0 -

Pill

36 PA1

35 PA2

PI”

34 PA3

33 PA4

PI”

32 PAS

PI”

31 PA 6

PI”

30 PA7 -

PI”

29 PC0

PI”

27 PC2

Pi”

28 PC1

PI”

26 PC3

Pi”

25 PC4

Pill

Pin 24

23 PC6

PI”

22 PC7

PI” PI” 21

20 +5v

PI”

PC5

DIG. COM.

PORT A

PORT

PORT CL

Figure 4-8. Pin Assignments of PI0 Cable Connector (J4)

Attaching Expansion Accessories

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 The following sections describe how to attach these expansion

accessories to DAS-1200 Series boards.

4-10

Cabling and Wiring

hap04Lfrm Page 11 Tuesday, June 7, 1994 lo:54 AM

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-I 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

1 Terminal Name /

LL GND

cnn LO negative

1 low-level ground

To connect an EXP- 16 or EXI- 16/A to a DAS- 1200 Series board, attach one end of an S- 1600 cable to the DAS- 1200 Series main I/O connector

(JI) and the other end of the cable to the Jl connector on the EXP- 16 or

EXP-16/A. Figure 4-9 illustrates the connection of an EXP-16 to a

DAS-1200 Series board.

Signal

input;

where n indicates the channel number

S-1604 Cable

m-r

DAS-1200 Series board

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

EXP.16

4-11

hap04_.frm Page 12 Tuesday, June 7,1994 lo:54 AM

Note: The S-1600 cable must DAS-1200 Series board.

Refer to the EXP-I6 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 PI0 cable c0ntlect0r

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.

(14).

Table 4-2. EXP-GP Terminal Names

used to connect the first EXP to the

4-12

1 Terminal Name 1

/ positive current excitation

To connect an EXP-GP to a DAS-1200 Series board, attach one end of an S-1600 cable to the DAS-1200 Series main I/O connector (Jl) and the other end of the cable to the Jl connector on the EXP-GP. Figure 4-10 illustrates the connection of an EXP-GP to a DAS-1200 Series board.

Sianal

Cabling and Wiring

.frm Page 13 Tuesday, June 7,1994 lo:54 AM

DAS-1200 Series board

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

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

pin 1

-mm-

EXP-GP

Attaching Multiple Expansion Accessories

You can daisy-chain up to eight EXP-16, EXP-16/A, and/or EXP-GP

expansion accessories to provide up to 128 analog input channels.

As shown in Figure 4-11, you connect the first expansion accessory to the DAS-1200 Series board by attaching one end of an S-1600 cable. to the main I/O connector (Jl) on the DAS-1200 Series board and the other end of the cable to the Jl connector on the expansion accessory.

4-13

hap04Lfrm

Page 14 Tuesday, June 7, 1994 lo:54 AM

DAS-1200

Series board

Jl J2

EXP-16 EXP-16

Figure 4-11. Attaching Multiple Expansion Accessories

To connect additional expansion boards, attach one end of a C-1800 or S-1800 cable to the J2 connector on the previous expansion board and the other end of the cable to the Jl connector on the next expansion board in the chain,

Notes:

associated with an analog input channel on the DAS-1200 Series board. You specify the associated DAS-1200 input channel by setting a jumper on each expansion accessory. Make sure that you use a unique jumper setting for each expansion accessory you are using. Refer to your expansion accessory documentation for more information.

Each EXP-16, EXP-16/A, or EXP-GP expansion accessory is

Jl 52

Jl J2 Jl

EXP-16 EXP-GP

4-14

Make sure that you attach EXP16 and EXP-16/A expansion accessories before EXP-GP expansion accessories.

You can access the remaining functions of the DAS-1200 Series board by including an STA-16 or STA-U screw terminal accessory in the daisy chain. Figure 4-12 illustrates how to connect two EXP-16 expansion accessories, one EXP-GP expansion accessory, and an STA-16 (or STA-U) screw terminal accessory to a DAS-1200 Series board,

Cabling and Wiring

Page 15 Tuesday, June 7,1994 lo:54 AM

DA512W

Series board

Figure 4-12. Attaching Multiple Expansion Accessories with an STA-16 or STA-U

Note:

access unused signals, you must attach the STA- 16 (or STA-U) first with a C-1800 or S-1800 cable.

STA-16 or STA-”

As shown in Figure 4-12, when you use an STA-16 (or STA-U) to

EXP-16

Jl 52 Jl

EXP-16

Attachina an ISO- Accessorv

The HO-4 is a high speed, universal expansion interface and isolation

amplifier, The RIO-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.

EXP-GP

Refer to the ISO- User’s

features and applications.

To connect an ISO- to a DAS-1200 Series board, attach one end of an

S-1600 cable to theDAS-1200 Series main I/O connector (Jl) and the other end of the cable to the Jl connector on the ISO- accessory. Figure

4-13 illustrates the connection of an ISO- accessory to a DAS-1200

Series board.

Guide

for more information about 1SO-4

4-15

I-$

hap04Lfrtn Page 16 Tuesday, June 7,1994 lo:54 AM

DAS-1200 Series board ’

Figure 4-13. Attaching an ISO-4 Accessory

Attaching SSH Accessories

888888888 88s388888

CJCchannel outputchannel

Simultaneous sample-and-hold (SSH) accessories allow you to acquire analog input data from multiple inputs simultaneously. SSH accessories available for DAS-1200 Series boards are the SSH-4/A and the SSH-8.

Figure 4-14 shows a diagram of a typical measurement system using an SSH-8.

Figure 4-14. A Typical SSH-8 Application

The following subsections describe how to attach SSH-4/A and SSH-X boards to DAS-1200 Series boards.

4-16

Cabling and Wiring

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Page 17 Tuesday, June 7,1994 lo:54 AM

Attaching an SSH-4lA

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-1200 Series boards.

Figure 4-15 shows how to attach the SSH-4/A to a DAS-1200 Series board.

SSH-4/A User Guide.

The

Figure 4-15. Attaching en SSH-4/A Accessory

Additional SSH-4/A accessories are attached in daisy-chain fashion with a 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

for DAS-1200 Series boards.

User’s

Guide.

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

Figure 4-16 and Figure 4-17 show how to attach SSH-8 boards to a DAS-1200 Series board.

4-17

.frm Page 18 Tuesday, June 7.1994 lo:54 AM

Figure 4-16. Attaching SSH-6 Accessories

When

you use the cabling

rlllCX:

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

When daisy-chaining two SSH-8 accessories to a DAS-1200 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

to 15 for the second.

shown in Figure 4-16, observe the following

growId.

4-18

Cabling and Wiring

hap04Qrtn

Page 19 Tuesday, June 7, 1994 lo:54 AM

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

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

w2.SSH.B 0, “*w*“ppw

Figure 4-17. Attaching SSH-6 and STA-16 Accessories

Caution:

SSH-8 outouts.

Refer to the

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

SSH-8

User’s G&e for more information.

4-19

hap04Lfrtn Page 20 Tuesday, June 7,1994 lo:54 AM

Attachina an MB Series Backdane

MB Series modules are ideally suited to applications where monitoring and control of temperature, pressure, flow, and other analog signals are required. Figure 4-18 shows a block diagram of a typical MB Series measurement and control application.

mV, V, Thermocouple,

RTD, Strain Gauge,

4-20 nlA /o-20 rnA

&, ~

Figure 4-18. Typical Measurement and Control Application

Table 4-3 provides a brief summary the backplanes available for use with

MB Series modules.

i$ji_/7 .,........i....~...........~. i_/j/_(/ o ,o +5 ” , *5 ”

4-20

Cabling and Wiring

.frm Page 21 Tuesday, June 7,1994 lo:54 AM

Table 4-3. MB Series Backplanes

Model

MB01 Holds up to 16 modules aod mounts in a 19-&h equipment rack.

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

Provides direct channel-to-channel cotmection to a DAS-1200 Series board making it suitable for high-speed, high-resolution applications.

terminal connections for all other signals on the DAS-1200 Series

board.

Attaching an MB01 Backplane

Use the Cl 6-MB 1 cable to connect backplane. This cable connects MB01 channels 0 through 15 to analog input channels 0 through 15 on the DAS-1200 Series board. Refer to Figure 4-19 for a cabling diagram.

Description

a DAS- 1200 Series board to an MB0 1

Figure 4-19. Attaching an MB01 Backplane

Note:

DAS-1200 Series

The channel connections are single-ended. Make sure. that the

board is set for 16-channel, single-ended operation.

4-21

hap04Lfrm Page 22 Tuesday, June 7,1994 lo:54 AM

Attaching an MB02 Backplane

Figure 4-20 shows how to connect the DAS-1200 Series to up to four MB02 backplanes. The STA-SCM16 interface connects one MB02 board to one analog input channel of the DAS-1200 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-1200 Series board.

4-22

C-2600

(four cables)

Figure 4-20. Attaching Multiple MB02 Backplanes

Figure 4-20 shows how the STA-SCM16 connects DAS-1200 Series boards with MB02 backplanes.

Cabling and Wiring

hap04Lfrm Page 23 Tuesday, June 7, I994 lo:54 AM

D/A CH 0 OUT

D/A CH 1 OUT

Backplane Connectors

Figure 4-21. MB02 I/O Connections

The four digital output lines on the DAS-1200 Series board 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-1200 Series board map directly to the connectors labeled 0 to 3 on the STASCM16.

In this arrangement, the channel connections arc single-ended. Make sure that the DAS-1200 Series board is set for single-ended, 16-channel operation.

Refer to the MB

Series User’s Guide

for more information.

4-23

hap04-.frm Page 24 Tuesday, June 7, 1994 lo:54 AM

+I+

Connecting Analog Signals

This section contains precautionary advice to consider before making

analog input connections. The section also shows some circuits for wiring

signal sources to input channels of DAS-1200 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.

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 DAS-1201 boards at high gains, read the precautionary information in the following section. Other considerations for I/O connections are offered under “Additional Precautions” on page

4-25.

Precautions for Using the DAS-1201 Board at High Gains

Operating DAS-1201 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 -5.0 V to +5.0 V, each bit of A/D output corresponds to 4.88 WV of analog input. Thus, with the high speed 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-1201 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.

4-24

Cabling and Wiring

hap04-.frm Page 25 Tuesday, June 7,1994 lo:54 AM

. 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 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 trV/oC. 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 provide access to inpuls 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.

4-25

hap04-.frm Page 26 Tuesday, June 7, 1994 IO:54 AM

Connecting a Signal to a Single-Ended Analog Input

Figure 4-22 shows the connections between a signal source and a channel of a DAS-1200 Series board configured for single-ended input mode.

DAS-12W Serles board ~~~

Figure 4-22. Connections for Wiring a Signal Source to a DAS-1200 Series Board

Configured for Single-Ended Inputs

The main I/O connector (Jl) 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.

Due to connector contact resistance and cable resistance, there may be many millivolts difference between the two grounds although they are connected to each other.

Note:

advised to wire all unused channels to LL GND. This action prevents the

input amplifiers from saturating, and it enswes the accuracy of your data.

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

4-26

Cabling and Wiring

hap04-.frm Page 27 Tuesday, June 7, 1994 lo:54 AM

Connecting a Signal to a Differential Analog Input

This section describes common connection schemes for differential inputs. The section also discusses the principles for avoiding ground

loops.

Common Connection Schemes for Differential Inputs

Figure 4-23 shows three methods of wiring a signal source to a channel of a DAS- 1200 Series board configured for differential input mode.

4-27

.frm Page 28 Tuesday, June 7,1994 lo:54 AM

DAS-1200 Series board

3 Channel n Low

LLGND

!‘ Channel n High

Figure 4-23. Three Methods for Wiring Differential Inputs

4-28

Cabling and Wiring

hap04Lfrm Page 29 Tuesday, June 7, 1994 IO:54 AM

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 (Ra) from the value of the source resistance (R,), using the following relationships:

When R, is greater than 100 Q use the connections in the upper circuit. The resistance of each of the two bias return resistors must equal 2000 R,.

When R, is less than 100 CL use the connections in the middle circuit, 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 Ground Loops with Differential Inputs

Very often, the signal-source ground and the DAS-1200 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

sides of a differential input (it appears between each side and ground).

voltage (!/cm) because it is normally common to both

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 the sum of the signal-source and common-mode voltages. Figure 4-24 shows the proper way to connect a differential input while Figure 4-25 illustrates the effect of a ground loop.

4-29

hap04Lfrm Page 30 Tuesday, June 7, 1994 lo:54 AM

DAS-1200 Ser’es board - ysGz$$g

Do not connect n LOW to LL GND at the computer

Figure 4-24. A Differential Input Configuration that Avoids a Ground Loop

CHANNEL n HIGH

DAS-1200 Series board

Figure 4-25. Differential Input Configuration with a Ground Loop

~cm i vg1 . vg2

= Ground

“Bl

!cr---

Ground

“01

4-30

Cabling and Wiring

hap055.frtn

Page 1 Tuesday, June 7, 1994 lo:56 AM

The Control Panel

The Control Panel is a utility program for testing the functions of your

DAS-1200 Series boards; it is available in a DOS version (CTL1600.EXE) and a Windows version (CTL1600W.EXE). The DOS

version is part of both the DAS-1200 Series standard software package

and the ASO- software package. The Windows version is a part of

the ASO- software package only.

Note:

advised to install the Keithley Memory Manager (VDMAD.386) to

ensure the allocation of a memory buffer large enough for Control Panel

needs. Refer to Appendix D for details of the Keithley Memory Manager.

To use the Control Panel, perform the following steps:

1. Start the Control Panel from the DOS or Windows environments as

Before using the Windows version of the Control Panel, you are

follows:

- Ifynu are in the containing the CTLl600,EXE program and enter the following at the DOS prompt:

CTL1600

If you are in the Windows enviromenl,

Control Panel icon in the DAS-1600 Group window, which is within the Program Manager window.

After the Control Panel starts, it asks you for the name of a configuration file.

DOS

environment, change to the directory

double click on the

5-1

hap05-.frm Page 2 Tuesday, June 7, 1994 lo:56 AM

2. To use the settings from the default configuration file, select OK. If you prefer to use the settings from another configuration file, enter the name of that file and select OK.

After the Control Panel accepts the name of a configuration file, it displays the DAS-1200 TEST & CONTROL panel. This panel contains the controls that allow you to acquire, read, and transfer data

and to set up and display parameters.

3. To set up and perform an operation, select the appropriate buttons. To obtain information on the setup and performance of an operation, use the Help option in the Control Panel menu. To obtain information on

DAS-1200 Series board functions and parameters, refer to Chapter 2.

4. To set up and perform a digital I/O operation, select Digital I/O from the Control Panel menu. When the Control Panel displays the DIGlTAL I/O panel, you can select appropriate buttons to proceed with your operation.

5. Ifyou are working in the Windows environment, you can use the

Control Panel’s Dynamic Data Exchange (DDE) to transfer data to

another Windows program by selecting DDE from the Control Panel menu and use the Display options/Graphics panel to graph up to eight channels.

Use the File menu to open, close, or save a file.

7. When you finisb using the Control Panel, select the Exit option from the File menu to terminate the program.

5-2

The Control Panel

hapOb.frm

Page 1 Tuesday, June 7, 1994 lo:57 AM

Calibration

Your DAS-1200 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-1200 Series board.

Ectuipment Reauirements

The equipment requirements for calibrating a DAS-1200 Series board are as follows:

. A digital voltmeter accurate to a minimum of 5 l/2 digits . An adjustable f10 V power source

Potentiometers and Test Points

Figure 3-l on page 3-14 shows the locations of the potentiometers and test points that are used during the calibration of a DAS-1200 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.

6-l

hap06 .frm Page 2 Tuesday, June 7, 1994 1057 AM

44 -

Calibration Utility

To calibrate a DAS-1200 Series board, use the DOS-based

CAL1200.EXE calibration utility. This utility is included in both the DAS-1200 Series standard software package and the ASO- software package.

Start the calibration utility by changing to its directory and entering the following at the DOS prompt:

CAL1200

Follow the utility-program prompts as they appear; the program guides you through the calibration process.

6-2

Calibration

hapOT_.frm Page 1 Tuesday, June 7, 1994 150 PM

Troubleshooting

If your DAS-1200 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.

Problem Isolation

If you encounter a problem with a DAS-1200 Series board, use the instructions in this section to isolate the cause of the problem before calling the factory.

identifying Symptoms and Possible Causes

Use the troubleshooting information in Table 7-l to try to isolate the problem. Table 7-1 lists general symptoms and possible solutions for problems with DAS-1200 Series boards.

7-1

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Table 7-1. Troubleshooting Information

7-2

Troubleshooting

hap07-.frtn Page 3 Tuesday, June 7, I994 1:50 PM

Table 7-1. Troubleshooting Information (cont.)

Symptom Possible Cause

Data appears t” be

invalid

An open connection exists. Check wiring to screw terminal.

Computer does not Board not seated properly. Check that the board is properly boot

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

Possible Solution

installed.

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

System lockup

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.

7-3

hap07_.fcm

Page 4 Tuesday, June 7, 1994 1:50 PM

Testing the Board and Host Computer

To isolate the problem to the DAS-1200 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: Removing a board with the power ON can cause damage to

your board and/or computer.

2. While keeping connections to accessories intact, unplug the accessory connector(s) or cable(s) from the DAS-1200 Series board(s).

3. Remove the DAS-1200 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.

4. With the DAS-1200 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-1200 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.

7-4 Troubleshooting

hap07-.frm Page 5 Tuesday, June 7, 1994 1:50 PM

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-1200

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-1200 Series board that you know is functional. Do not make any I/O connections.

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-1200 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-1200 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 fat

instructions on obtaining assistance.

7-5

&- hap07Lfrm

Technical Support

Page 6 Tuesday, June 7,1994 1:50 PM

Before returning any equipment for repair, call the factory. Please make

sure that you have the following information available before you call:

DAS-1200SeriesBoard Configuration

Operating System

Software package

Model Serial # Revision code Base address setting Interrupt level setting Number of channels Input (SE. or Diff.)

DMA chaa(s) Number of SSH-8 brds.

Number of EXP brds.

Gain selection setting Manufacturer

CPU type Clock speed (MHz) KB of RAM

Video system

BIOS type

DOS version Windows version Windows mode

Name Serial # Version Invoice/Order #

7-6

Compiler (if applicable)

Accessories

Language Manufacturer

Version

;;:

5Pe 5Po 5~e 5Pe 5Pe

Troubleshooting

.frtn Page 1 Tuesday, June 7, 1994 12:30 PM

Tables A-l to A-6 list specifications for the DAS-1200 Series boards.

Table A-l. Analog Input Specifications

Specifications

1 Attribute

Throughput’ SO kHz maximum for gains less 100 kHz maximum for all gaios

Absolute accuracy

DAS-1201 Boards DAS-1202 Boards

than 500

10 kHz maximum for a gain of

500

Maximum unadjusted error: For gain < 500: 0.7% of reading fl LSB maximum @ 25°C For gait1 = 500 0.8% of reading fl LSB maximum @ 25°C

A-l

.frm Page 2 Tuesday, June 7, 1994 12:30 PM

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

Attribute

Temperature coefficient of Gain:

accuracy (includes ADC)

DAS-1201 Boards DAS-1202 Boards

flO0 ppm/ OC maximum

Acquisition time: 1.4 ps

~~~~~~~~~~~~~~~~~~~~

1 Aaerture uncertaintv: 300 DS rms

f2.5 nA maximum over operating f0.02 nA maximum over range operating range

Gain: fl50 ppm/ ‘C maximum

Noise*

DMA channels Interrupt levels 2, 3,4, 5, 6, nnd 7

A-2

Bipolar electrical noise (in

COlMS)

.Gain=l:p-p=l;rms=O.l * Gain = 1: p-p = I; mu = 0. I * Gain = 10: p-p = 1; rms = 0.1 * Gain = 100: p-p = 2, rms = 0.2 . Gain = 500: D-D = 4: rms = 0.5 - Gain = 8: D-D = 2: nns = 0.2

Bipolar electrical noise (in counts)

.Gain=2:p-p=l;rms=O.l .Gain=4:p-p=l;rms=O.l

Specifications

.frm Page 3 Tuesday, June 7, 1994 12:30 PM

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

/ Attribute

Minimum external pacer clock pulse width

Maximum external pacer clock rate

DAS-1201 Boards DAS-1202 Boards

10ns

Notes

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

result (within fl 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.

‘The figures in the table show the electrical noise introduced by the analog front-end, but do oat 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 I LSB to the electrical noise; it also m,&es the rms level 0.5 LSBs.

Table A-2. Digital l/O Specifications (S-bits~on Main l/O Connector)

/ Attributes

1 DAS-1200 Series Boards

Notes

’ IPO/TRIG O/XPCLK minimum pulse width = 10.0 ns.

A-3

ppx a .frm Page 4 Tuesday, June 7, 1994 12:30 PM

2 --

Attributes DAS-1200 Series Boards

Table A-3. Digital I/O Specifications (24-bits on PI0 Cable Connector)

Inputs (and interrupts)

Table A-4. Programmable Counter/Timer Specifications

1 Attributes 1 DAS-1200 Series Boards

I Outputs (buffered) I LOW voltage: 0.5 v maximum @ Isink = 25.0 mA

j Inputs (buffered) I Low voltage:

Low voltage: 0.8 V maximum

High voltage: 2.0 V minimum

0.8 V maximum.

High voltage: 2.0 V minimum

Clock input

I Active count edge / Negative

Minimum clock p&e widths ~~~~~~~~~~~~~~~~~~~~

A-4 Specifications

.:.:.:.:.:.:i:.:.:.:.:.:.:.:.:.:

F ..j........j....j......j.....,..........,.......................,

. I ..,..,....,...,..,.,.,.,.,.,.,.,.,.,.,.,.

.,./:(.:,,_:(.//,. .~,~./~/,/(,~,~,~,)~,~,)~,~,~,~,;~,~,~,~,~

.,,,.,.,,,./,/./,(./

.frm Page 5 Tuesday, June 7,1994 12:30 PM

Table A-5. Power Supply Requirements

1 Attribute

+5 VDC supply +1’2 VDC supply

-12 VDC supply

DAS-1200 Series Boards

235 mA typical

4 mA typical

Table A-6. Environmental Specifications

1 Attribute

I Ooeratine temneratme I 0 to 70 “C

1 Humidity

DAS-1200 Series Boards

1 0 to 95% noncondensinn

A-5

Tektronix DAS-1200 Series Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual