Omega Products CIO-DAS6402-12 Installation Manual

User's Guide

http://www.omega.com

e-mail: [e-mail]

CIO-DAS6402/12
CIO-DAS6402/16

TABLE OF CONTENTS

CHAPTER 1: QUICK START¸ ..........................................................

CHAPTER 2: INTRODUCTION .......................................................

CHAPTER 3: INSTALLATION & CONFIGURATION .....................................

CHAPTER 4: SOFTWARE ............................................................

¸

CHAPTER 5: ANALOG CONNECTIONS ..................................................

1

1¸1.1 INSTALL THE INSTACALTM SOFTWARE .....................................................

1¸1.2 RUN INSTACALTM ..................................................................

3

32.1 GENERAL INFORMATION .................................................................

4

53.1 BASE ADDRESS ....................................................................

53.2 D/A OUTPUT RANGE SWITCH (CIO-DAS6402/16 ONLY) ..........................................

53.3 D/A UPDATE MODE (CIO-DAS6402/16 ONLY) ................................................

6

64.1 CUSTOM SOFTWARE UTILIZING THE UNIVERSAL LIBRARY DRIVER .....................................

64.2 THE USE OF A FULL INTEGRATED SOFTWARE PACKAGE (E.G. LABTECH NOTEBOOK) .........................

64.3 DIRECT REGISTER LEVEL PROGRAMMING. ......................................................

7

7¸5.1 ANALOG INPUTS .................................................................

75.1.1 Single-Ended and Differential Inputs .................................................

95.1.2 System Grounds and Isolation ......................................................

11¸5.2 WIRING CONFIGURATIONS ..............................................................

125.2.1 Common Ground / Single-Ended Inputs ..............................................

125.2.2 Common Ground / Differential Inputs ...............................................

125.2.3 Common Mode Voltage < +/-10V / Single-Ended Inputs ..............................

135.2.4 Common Mode Voltage < +/-10V / Differential Inputs ..............................

135.2.5 Common Mode Voltage > +/-10V .................................................

145.2.6 Isolated Grounds / Single-Ended Inputs ..............................................

145.2.7 Isolated Grounds / Differential Inputs ...............................................

145.3 ANALOG OUTPUTS ................................................................

CHAPTER 6: CIO-DAS6402 ARCHITECTURE .........................................

CHAPTER 7: CALIBRATION AND TEST .............................................

15

156.1 CONTROL & DATA REGISTERS .....................................................

166.1.1 A/D Data word registers ..........................................................

176.1.2 CHANNEL MUX HI/LO LIMITS WORD REGISTER ....................................

186.1.3 8-BIT DIGITAL I/O REGISTERS ...................................................

186.1.4 DIGITAL TO ANALOG CONVERTER (ANALOG OUT) REGISTERS ......................

206.1.5 STATUS REGISTER ............................................................

226.1.6 INTERRUPT AND PACER CONTROL REGISTER .....................................

236.1.7 TRIGGER CONTROL/ DAC RANGE SELECT REGISTER ...............................

246.1.8 COMPATIBLE MODE CONTROL REGISTER ........................................

266.1.9 PACER CLOCK DATA AND CONTROL REGISTERS ..................................

28

287.1 REQUIRED EQUIPMENT ...........................................................

287.2 CALIBRATING THE A/D & D/A CONVERTERS .........................................

CHAPTER 8: HELPFUL SIGNAL CONDITIONING HINTS ................................

APPENDIX A: CONNECTOR PINOUTS .................................................

APPENDIX B: SPECIFICATIONS ....................................................

29

298.1 VOLTAGE DIVIDERS ...............................................................

308.2 LOW PASS FILTERS ................................................................

31

32

32B.1 CIO-DAS6402/16 ...................................................................

35B.2 CIO-DAS6402/12 ...................................................................

Chapter 1: QUICK START

The installation and operation of all CIO-DAS6402 series boards is very similar. Throughout this manual we use CIO-DAS6402 as
a generic designation for the CIO-DAS6402/12 and CIO-DAS6402/16. When required due to the differences in the boards, the
specific board name is used.

The CIO-DAS6402 is easy to use. This quick start procedure will help you quickly and easily setup, install and test your board. We
assume you already know how to open the PC and install expansion boards. If you are unfamiliar or uncomfortable with board
installation, please refer to your computer’s documentation.

We recommend you perform the software installation described in sections 1.1 and 1.2 below prior to installing
the board in your computer. The InstaCal

TM

operations below will show you how to properly set the swtiches

and jumpers on the board prior to physically installing the board in your computer.

1.1 INSTALL THE

INSTACAL

TM

SOFTWARE

Windows (in its various forms) and DOS users install the program by running the Install.exe program supplied with your
DAS-6402 software. It will create all required folders/directories and unpack the various pieces of compressed software. Simply
run install and follow the on-screen instructions. Remember where the installed files are placed, as you will need to access them in
the next step (the default location is on your main hard drive in a directory or folder named C:\CB\).

TM

1.2 RUN

INSTA

CAL

To run InstaCalTM in the various for ms of Windows, find the file named InstaCal.exe using your file management system and
double click your mouse on it. In DOS simply type instacal and press the Enter key.

Once running, InstaCal

TM

provides four sub-menus (plus exit).

1. Select Install (either highlight it and hit enter of double click your
mouse on it).

2. Select Board #0 (select another number if Board #0 is already installed)

3. Select Board Type

4. Move through the selections and highlight the particular board you
are installing (e.g. CIO-DAS6402/16 or CIO-DAS6402/12).
Either double click on the board or hit enter.

1

5. The board’s default settings are then displayed. The board’s defaults are:

Base Address 300H (768 Decimal).
Interrupt level 5
# of Channels 64 Channels, Single-Ended.

A/D Ranges Bipolar

Clock Edge Rising

D/A #0 Range +/- 5V
D/A #1 Range +/- 5V

6. You are now ready to install the board in your computer. Open your PC (after
turning off the power) and install the board. After the board is installed and the
computer is closed up, turn the power back on.

7. Run InstaCal

TM

again, and at the main menu select Test.

a. Select the board you just installed
b. Select Input, and then CH 0
c. Select Source, and then DAC0
d. Select Plot, the required connections to complete the test
will then be shown on your computer screen. Either use the jumper
wires provided with the board to make the connections directly on
the board’s I/O connector, or make the connection with a jumper
wire on your Screw Terminal Adapter board.

8. Once you have connected the D/A output to the A/D input, proceed and plot the
waveform. You should observe a sawtooth waveform. If you do, your board is
installed and working properly. If not we suggest the following.

a. make certain you have connected the correct pins according to the
connector diagram.

b. go back through the installation procedure and make sure you have
installed the board according to the instructions.

If this does not get you to the sawtooth waveform display, please call us for additional assistance.

2

Chapter 2: INTRODUCTION

2.1 GENERAL INFORMATION

Congratulations on your purchase of the CIO-DAS6402/16 and/or CIO-DAS6402/12. With 32 differential or 64 single-ended
input, these boards set the standard for high channel count analog I/O on the ISA bus. Offering sample rates as high as 330 Khz
(100 Khz for the 16-bit version), the CIO-DAS6402 is unparalleled with its combination of high speed, high channel count, high
resolution and low cost! Utilizing a 100 pin connector, the CIO-DAS6402 is the first board to approach such large channel counts
without the requirement for slow and costly external expansion boards.

The board’s analog input ranges are entirely software selectable in bipolar ranges from ±10 to ±1.25 Volts and unipolar ranges
from 0-10 to 0-1.25 Volts. The A/D converter may be triggered externally, or internally based on edge or level trigger sources.
The board supports standard (post) and pretrigger operation and so is ideally suited for continuous, scheduled or event triggered
data acquisition.

High speed data acquisition without the chance of a lost sample is assured by the boards’ use of the REP INSW data transfers and
the onboard 1Kilosample FIFO memory. In addition to the analog input section, each board also provides 2 channels of analog
output, 8-bits of digital input, 8-bits of digital output as well as a variety of counter/timer functionality.

All CIO-DAS6402 functions are fully supported by UniversalLibrary

TM

software package. This software provides upper level

programming support for all DOS and Windows based operating systems. The CIO-DAS6402 is also shipped complete with

Insta

TM

, a powerful and easy to use installation, test and calibration software package.

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3

Chapter 3: INSTALLATION & CONFIGURATION

The CIO-DAS6402 has a variety of switches and jumpers to set before installing the board in your computer. By far the simplest

TM

way to configure your board is to use the Insta
Insta

TM

will show you all available options, how to configure the various switches and jumpers to match your application

Cal

program provided as part of your CIO-DAS6402 software package.

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requirements, and will create a configuration file that your application software (and the Universal Library) will refer to so the
software you use will automatically know the exact configuration of the board.

Please refer to Chapter 1 regarding the installation and operation of Insta

TM

. The following hard copy information is provided

Cal

as a matter of completeness, and will allow you to set the hardware configuration of the CIO-DAS6402 board if you do not have

TM

immediate access to Insta

and/or your computer. The locations of each of the switches and jumpers are shown in the

Cal

diagrams below.

CIO-DAS6402/12

CIO-DAS6402/16

4

3.1 BASE ADDRESS

(

)

Unless there is already a board in your system using address 300 HEX (768 Decimal), you can leave the switches as they are set at
the factory. In the example shown below, the CIO-DAS6402 is set at base address 300H

9876

BASE A DDRESS S W ITCH

5

4

SW
A9
A8
A7
A6
A5
A4

HEX
200
100
80
40
20
10

- Address 300H shown here.

3.2 D/A OUTPUT RANGE SWITCH (CIO-DAS6402/16 ONLY)

The analog output ranges of the CIO-DAS6402/12 are set via software.

The analog output ranges of the CIO-DAS6402/16 are set by dip switches on the board. The diagram below shows the allowable
switch settings and ranges.

Range SW 1 SW 2 SW 3 SW 4 SW 5

1 2 3 4 5

O
N

DNUPDNUPDN±10.0 V

UPDNDNUPDN±5.0 V

DNDNDNUPDN±2.5 V

DNUPUPDNUP0 - 10 V

CIO-DAS6402/16 Analog Output

Configuration Sw itch

(s h o wn as + /- 1 0 Vo lt full-sc a le)

3.3 D/A UPDATE MODE

The analog outputs can be configured to update independently or simultaneously. The update mode is set by a jumper on the
CIO-DAS6402/16. This jumper is shown below.

Place the jumper on the XFER side for simultaneous update. Place
the jumper on the UPDATE side for independent operation.

(CIO-DAS6402/16 ONLY)

XFERUPDATE

CIO-DAS6402/16 D/A

UPDATE MODE SELECT

SHOWN IN SIM ULTANEOUS UPDATE MODE

UPDNUPDNUP0 - 5.0 V

DNDNUPDNUP0 - 2.5 V

5

Chapter 4: SOFTWARE

There are three common types of data acquisition software used with the CIO-DAS6402. These are: Custom software utilizing the
UniversalLibrary, using a fully integrated software package (e.g. Labtech Notebook), direct register level programming.

4.1 CUSTOM SOFTWARE UTILIZING THE UNIVERSAL LIBRARY

The most popular software option for CIO-DAS6402 is writing a program using Universal Library. The Universal Library takes
care of all the board I/O commands and lets you concentrate on the application part of the software. For additional information
regarding using the Universal Library, please refer to the documentation supplied with the Universal Library.

4.2 FULLY INTEGRATED SOFTWARE PACKAGES (E.G. LABTECH NOTEBOOK)

Many customers also take advantage of the power and simplicity offered by one of the upper level data acquisition packages.
Please refer to the package’s documentation for setup and usage details.

4.3 DIRECT REGISTER LEVEL PROGRAMMING.

Though uncommon, some app lications do not allo w the use of our Universal Lib rary, and ar e not a good match for an upper level
package. For these sophisticated programmers, we provide a detailed register mapping in Chapter 6.

Insta
data acquisition board. InstaCal also creates a configuration file required for programmers who use the Universal Library
programming libraries.

TM

is a complete installation, calibration and test package. Use it to guide the installation procedure and to calib rate your

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6

Chapter 5: ANALOG CONNECTIONS

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5.1 ANALOG INPUTS

Analog signal connection is one of the most challenging aspects of applying a data acquisition board. If you are an Analog
Electrical Engineer then this section is not for you, but if you are like most PC data acquisition users, the best way to connect your
analog inputs may not be obvious. Though complete coverage of this topic is well beyond the scope of this manual, the following
section provides some explanations and helpful hints regarding these analog input connections. This section is designed to help you
achieve the optimum performance from your CIO-DAS6402 series board.

Prior to jumping into actua l connection sche mes, you should have at least a basic und erstanding of Singl e-Ended/Differential inputs
and system grounding/isolation. If you are already comfortable with these concepts you may wish to skip to the next section (on
wiring configurations).

5.1.1 Single-Ended and Differential Inputs

The CIO-DAS6402 provides either 32 differential or 64 single-ended input channels. The concepts of single-ended and differential
inputs are discussed in the following section.

Single-Ended Inputs

A single-ended input measures the voltage between the input signal and ground. In this case, in single-ended mode the
CIO-DAS6402 measures the voltage between the input channel and LLGND. The single-ended input configuration requires only
one physical connection (wire) per channel and allows the CIO-DAS6402 to monitor more channels than the (2-wire) differential
configuration using the same connector and onboard multiplexor. However, since the CIO-DAS6402 is measuring the input voltage
relative to its own low level ground, single-ended inputs are more susceptible to both EMI (Electro Magnetic Interference) and any
ground noise at the signal source. The following diagrams show the single-ended input configuration

CH IN

LL GND

I/O

Connector

+

-

Inp u t

Amp

To A/D

Single-Ended Input

~

CH IN

Vs

1

voltage differential betw een grounds

An

1 and g2 shows up as an error signal

at the input amplifier

Vs + V

2 - Vg1

LL GN D

+

Inp u t
Amp

To A/ D

-

2

Single-ended input w ith C om m on Mode Voltage

Differential Inputs

7

Differential inputs measure the voltage between two distinct input signals. Within a certain range (referred to as the common mode

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range), the measurement is almost independent of signal source to CIO-DAS6402 ground variations. A differential input is also
much more immune to EMI than a single-ended one. Most EMI noise induced in one lead is also induced in the other, the input
only measures the difference between the two leads, and the EMI common to both is ignored. This effect is a major reason there is
twisted pair wire as the twisting assures that both wires are subject to virtually identical external influence. The diagram below
shows a typical differential input configuration.

CH High

CH Low

LL GN D

I/O

Connector

Vs

~

Vcm = V

12

Common Mode Volta
b

differential input configuration. Ho w e ver,
no te th a t V cm + Vs m u s t remain w ithin
the amplifier’s co m mon m ode ran

+

Inp ut

Amp

-

Differential Inpu t

Vcm

2 - Vg1

e (Vcm) is ignored

e of ±10V

Vs

CH High

CH Low

LL GND

To A/ D

+

Inp u t

Amp

-

Differential
Inp ut

To A/ D

Before moving on to the discussion of grounding and isolation, it is important to explain the concepts of common mode, and
common mode range (CM Range). Common mode voltage i s depicted in the d iagram above as Vcm. T hough differential input s
measure the voltage between two signals, without (almost) respect to the either signal’s voltages relative to ground, there is a limit
to how far away from ground either signal can go. Though the CIO-DAS6402 has differential inputs, it will not measure the
difference between 100V and 101V as 1 Volt (in fact the 100V would destroy the board!). This limitation or common mode range
is depicted graphically in the following diagram. The CIO-DAS6402 common mode range is +/- 10 Volts. Even in differential
mode, no input signal can be measured if it is more than 10V from the board’s low level ground (LLGND).

8

+13V

g

+12V
+11V
+10V
+9V
+8V
+7V
+6V
+5V
+4V
+3V
+2V
+1V

-1V

-2V

-3V

-4V

-5V

-6V

-7V

-8V

-9V

-10V

-11V

-12V

-13V

Gray area represents com m on m ode range
Both V+ and V- must always remain within
the co mmo n m o d e ra n

W ith V cm= +5 V DC ,
+Vs must be less than +5V, or the common m ode range will b e ex c e e d e d (> + 1 0 V)

Vcm

Vcm (Comm on M o de Voltage) = +5 Volts

e relative to LL G nd

5.1.2 SYSTEM GROUNDS AND ISOLATION

There are three scenarios possible when connecting your signal source to your CIO-DAS6402 board.

1. The CIO-DAS6402 and the signal source may have the same (or
ground. This signal source may be connected directly to the CIO-DAS6402.

2. The CIO-DAS6402 and the signal source may have an offset voltage
between their grounds (AC and/or DC). This offset it commonly
referred to a

common mode voltage

. Depending on the magnitude of
this voltage, it may or may not be possible to connect the CIO-DAS6402
directly to your signal source. We will discuss this topic further in a later
section.

3. The CIO-DAS6402 and the signal source may already have

grounds

. This signal source may be connected directly to the

CIO-DAS6402.

Which system do you have?

Try the following experiment. Using a battery powered voltmeter*, measure the voltage (difference) between the ground signal at
your signal source and at your PC. Place one voltmeter probe on the PC ground and the other on the signal source ground. Measure
both the AC and DC Voltages.

*If you do not have access to a voltmeter, skip the experiment and take a look a the following three sections. You may be able to identify your
system type from the descriptions provided.

common

isolated

)

If both AC and DC readings are 0.00 volts, you may have a system with common grounds. However, since voltmeters will average
out high frequency signals, there is no guarantee. Please refer to the section below titled

9

Common Grounds

.

If you measure reasonably stable AC and DC voltages, your system has an offset voltage between the grounds category. This offset
is referred to as a Common Mode Voltage. Please be careful to read the following warning and then proceed to the section
describing Common Mode systems.

WARNING

If either the AC or DC voltage is greater than 10 volts, do not connect the CIO-DAS6402 to this signal source.
You are beyond the boards usable common mode range and will need to either adjust your grounding system
or add special Isolation signal conditioning to take useful measurements. A ground offset voltage of more
than 30 volts will likely damage the CIO-DAS6402 board and possibly your computer. Note that an offset
voltage much greater than 30 volts will not only d amage your electronics, but it may also be hazardous to
your health.

This is such an important point, that we will state it again. If the voltage between the ground of your signal
source and your PC is greater than 10 volts, your board will not take useful measurements. If this voltage is
greater than 30 volts, it will likely cause damage, and may represent a serious shock hazard! In this case you
will need to either reconfigure your system to reduce the ground diff erentials, or purcha se and install specia l
electrical isolation signal conditioning.

If you cannot obtain a reasonably stable DC voltage measurement between the grounds, or the voltage drifts around considerably,
the two grounds are most likely isolated. The easiest way to check for isolation is to change your voltmeter to it’s ohm scale and
measure the resistance between the two grounds. It is recommended that you turn both systems off prior to taking this resistance
measurement. If the measured resistance is more than 100 Kohm, it’s a fairly safe bet that your system has electrically isolated

grounds.

Systems with Common Grounds

In the simplest (but perhaps least likely) case, your signal source will have the same ground as the CIO-DAS6402. This would
typically occur when providing power or excitation to your signal source directly from the CIO-DAS6402. There may be other
common ground configurations, but it is important to note that any voltage between the CIO-DAS6402 ground and your signal
ground is a potential error voltage if you set up your system based on a common ground assumption.

As a safe rule of thumb, if your signal source or sensor is not connected directly to an LLGND pin on your CIO-DAS6402, it’s
best to assume that you do not have a common ground even if your voltmeter measured 0.0 V olts. Configure your system as if there
is ground offset voltage between the source and the CIO-DAS6402. This is especially true if you are using either the
CIO-DAS6402/16 or the CIO-DAS6402/12 at high gains, since ground potentials in the sub millivolt range will be large enough to
cause A/D errors, yet will not likely be measured by your handheld voltmeter.

Systems with Common Mode (ground offset) Voltages

The most frequently encountered grounding scenario involves grounds that are somehow connected, but have AC and/or DC offset
voltages between the CIO-DAS6402 and signal source grounds. This offset voltage my be AC, DC or both and may be caused by a
wide array of phenomena including EMI pickup, resistive voltage drops in ground wiring and connections, etc. Ground offset
voltage is a more appropriate term to describe this type of system, but since our goal is to keep things simple, and help you make
appropriate connections, we’ll stick with our somewhat loose usage of the phrase Common Mode.

Small Common Mode Voltages

If the voltage between the signal source ground and CIO-DAS6402 ground is small, the combination of the ground voltage and
input signal will not exceed the CIO-DAS6402’s +/-10V common mode range, (i.e. the voltage between grounds, added to the
maximum input voltage, stays within +/-10V), This input is compatible with the CIO-DAS6402 and the system may be connected
without additional signal conditioning. Fortunately, most systems will fall in this category and have a small voltage differential
between grounds.

Large Common Mode Voltages

If the ground diffe rential is large enough, the CIO -DAS6402’s +/- 10V common mode range will be exceeded (i.e. the voltage
between CIO-DAS6402 and signal source grounds, added to the maximum input voltage you’re trying to measure exceeds +/-10V).
In this case the CIO-DAS6402 cannot be directly connected to the signal source. You will need to change your system grounding
configuration or add isolation signal conditioning. (Please look at our ISO-RACK and ISO-5B-series products to add electrical
isolation, or give our technical support group a call to discuss other options.)

10