Measurement CIO-DAC02 User Manual

CIO-DAC02

Analog Output Board

User's Guide

Document Revision 5, March, 2010

© Copyright 2010, Measurement Computing Corporation

HM CIO-DAC02.doc

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3

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Notice

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Measurement Computing Corporation products are not designed with the components required, and are not subject
to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people.

4

Table of Contents

Preface

About this User's Guide ....................................................................................................................... 6

What you will learn from this user's guide ......................................................................................................... 6

Conventions in this user's guide ......................................................................................................................... 6

Where to find more information ......................................................................................................................... 6

Chapter 1

Introducing the CIO-DAC02 ................................................................................................................. 7

Overview: CIO-DAC02 features ........................................................................................................................ 7

CIO-DAC02 block diagram .............................................................................................................................................. 7

Software features ................................................................................................................................................ 7

Chapter 2

Installing the CIO-DAC02 ..................................................................................................................... 8

What comes with your CIO-DAC02 shipment? ................................................................................................. 8

Hardware .......................................................................................................................................................................... 8

Additional documentation .................................................................................................................................. 8

Optional components .......................................................................................................................................... 8

Unpacking the CIO-DAC02 ............................................................................................................................... 9

Installing the software ........................................................................................................................................ 9

Configuring the CIO-DAC02 ............................................................................................................................. 9

Base address switch .......................................................................................................................................................... 9

Wait state jumper .............................................................................................................................................................10

Voltage reference jumpers ...............................................................................................................................................11

Installing the CIO-DAC02 ............................................................................................................................... 11

Connecting the board for I/O operations .......................................................................................................... 12

Connectors, cables – main I/O connector ........................................................................................................................12

Field wiring, signal termination, and conditioning ..........................................................................................................12

Chapter 3

Functional Details ............................................................................................................................... 13

Analog outputs ................................................................................................................................................. 13

4-20 mA outputs ............................................................................................................................................... 13

Chapter 4

Specifications ...................................................................................................................................... 15

Analog output ................................................................................................................................................... 15

Power consumption .......................................................................................................................................... 15

Environmental .................................................................................................................................................. 16

Main connector and pin out .............................................................................................................................. 16

Declaration of Conformity .................................................................................................................. 17

5

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide explains how to install, configure, and use the CIO-DAC02 board so that you get the most out
of its analog output features. This user's guide also refers you to related documents available on our web site,
and to technical support resources.

Conventions in this user's guide

The following conventions are used in this manual to convey special information:

For more information on …

Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.

Shaded caution statements present information to help you avoid injuring yourself and others, damaging your

hardware, or losing your data.

< : > Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned

to registers, bit settings, etc.

bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For

example:

1. Insert the disk or CD and click the OK button.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For

example:
The InstaCal installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board.

Where to find more information

For additional information relevant to the operation of your hardware, refer to the Documents subdirectory
where you installed the MCC DAQ software (C:\Program Files\Measurement Computing\DAQ by default), or
search for your device on our website at www.mccdaq.com.

If you need to program at the register level in your application, refer to the Register Map for the CIO-DAC02.
This document is available on our website at www.mccdaq.com/registermaps/RegMapCIO-DAC02.pdf.

6

D/A1 bipolar gain

D/A1 unipolar offset

D/A1 4-20 gain, unipolar gain & bipolar offset

D/A0 bipolar gain

D/A 0 unipolar offset

D/A0 4-20 gain, unipolar gain & bipolar offset

VREF adjust

4-20 #1 offset
4-20 #0 offset

VREF Jumper Block

Wait State Jumper

PC/XT/AT Bus Connector

i0

i Out buffer

D/A converter 0

D/A converter 1

Uni 0 Bip 0 Uni 1

Bip 1

D/A 0

D/A 1

­5

­1
0

E
X
T-5

­1
0

E
X
T

UP
DN

9

87654 3

2

i1

Wait State

6.95 Volt Reference Circuit

Base Address Switch

Chapter 1

Introducing the CIO-DAC02

Overview: CIO-DAC02 features

The CIO-DAC02 provides two channels of 12-bit analog voltage or current output. Each analog output is
controlled by a 12-bit D/A converter. A 12-bit converter provides 1/4096 parts resolution. On a scale of 0-5
volts, the output can be controlled to within 1.22 mV.

The output voltage reference for each D/A is jumper-selectable for Bipolar or Unipolar. Bipolar ranges are ±10
V and ±5 V. Unipolar ranges are 0 to 10 V, 0 to 5 V, and 4 to 20 mA. You can also provide an external voltage
reference via connections to the board's 25-pin connector.

The board also features a wait state generator that you enable with an on-board jumper.

CIO-DAC02 block diagram

Software features

For information on the features of InstaCal and the other software included with your CIO-DAC02, refer to the
Quick Start Guide that shipped with your device.

Figure 1. CIO-DAC02 functional block diagram

7

Installing the CIO-DAC02

What comes with your CIO-DAC02 shipment?

The following items are shipped with the CIO-DAC02.

Hardware

 CIO-DAC02

Chapter 2

Additional documentation

In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at

www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf). This booklet supplies a brief description of

the software you received with your CIO-DAC02 and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.

Optional components

You can also order the following MCC product to use with your CIO-DAC02.

 C25FM-x cables

 Signal termination and conditioning accessories

MCC provides signal conditioning and termination products for use with the CIO-DAC02. Refer to Field

wiring, signal termination, and conditioning on page 12 for a complete list of compatible accessory

products.

8

CIO-DAC02 User's Guide Installing the CIO-DAC02

Board label

Switch/jumper description

Default setting

ADDRESS

DIP switch for setting the base address

300h (768 decimal)

WAIT STATE

Jumper to enable a wait state

OFF position

D/A0 D/A1

Jumpers to set the output voltage reference

External (X) position

5

4

3

2

69

8

7

SW
A9
A8
A7
A6
A5
A4
A3
A2

HEX
200
100
80
40
20
10
08
04

Unpacking the CIO-DAC02

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the CIO-DAC02 from its packaging, ground yourself using a wrist strap or by
simply touching the computer chassis or other grounded object to eliminate any stored static charge.

If any components are missing or damaged, notify Measurement Computing Corporation immediately by
phone, fax, or e-mail:

 Phone: [phone] and follow the instructions for reaching Tech Support.
 Fax: [phone] to the attention of Tech Support
 Email: [e-mail]

Installing the software

Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing Data
Acquisition Software CD. This booklet is available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-

Quick-Start.pdf.

Configuring the CIO-DAC02

The CIO-DAC02 has one base address switch, one wait state jumper, and one output range jumper which you
must set before installing the board in your computer. The InstaCal calibration and test program included with
the CIO-DAC02 will show you how to set the switches. Run InstaCal before you open your computer and
install the board. The CIO-DAC02 is shipped with the factory-default settings listed below.

Factory-configured default settings

Before installing the CIO-DAC02, verify that the board is configured with the settings that you want. Review
the following information to change the default configuration of a jumper or switch on the CIO-DAC02 board.

Base address switch

Before you install the CIO-DAC02 in your computer, set the base address by using the dip switch labeled

ADDRESS located on the board. The easiest way to set the base address switch is to let InstaCal show you the

correct settings. However, if are already familiar with setting ISA base addresses, you may use the base address
switch description below to guide your base address selection.

Unless there is already another board in your system using address 300 hex (768 decimal), leave the switches as
they are set at the factory. The example shown in Figure 2 shows the settings for the factory-default base
address of 300 hex.

Figure 2. CIO-DAC02 base address switches

9

CIO-DAC02 User's Guide Installing the CIO-DAC02

Hex Range

Function

Hex Range

Function

000-00F

8237 DMA #1

2C0-2CF

EGA

020-021

8259 PIC#1

2D0-2DF

EGA

040-043

8253 Timer

2E0-2E7

GPIB (AT)

060-063

8255 PPI (XT)

2E8-2EF

Serial Port

060-064

8742 Controller (AT)

2F8-2FF

Serial Port

070-071

CMOS RAM & NMI mask (AT)

300-30F

Prototype card

080-08F

DMA page registers

310-31F

Prototype card

0A0-0A1

8259 PIC #2 (AT)

320-32F

Hard disk (XT)

0A0-0AF

NMI mask (XT)

378-37F

Parallel printer

0C0-0DF

8237 #2 (AT)

380-38F

SDLC

0F0-0FF

80287 numeric CO-P (AT)

3A0-3AF

SDLC

1F0-1FF

Hard disk (AT)

3B0-3BB

MDA

200-20F

Game control

3BC-3BB

Parallel printer

210-21F

Expansion unit (XT)

3C0-3CF

EGA

238-23B

Bus mouse

3D0-3DF

CGA

23C-23F

ALT bus mouse

3E8-3EF

Serial port

270-27F

Parallel printer

3F0-3F7

Floppy disk

2B0-2BF

EGA

3F8-3FF

Serial port

O
N

O
F
F

In the default configuration shown in Figure 2, addresses 9 and 8 are DOWN, and all others are UP.
Address 9 = 200 hex (512 decimal) and address 8 = 100 hex (256 decimal); when added together they equal
300 hex (768 decimal).

Disregard the numbers printed on the switch

When setting the base address, refer to the numbers printed in white on the printed circuit board.

PC I/O addresses

The CIO-DAC02 Base switch can be set for an address in the range of 000-3E0, so it should not be hard to find
a free address area for your CIO-DAC02. If you are not using IBM prototyping cards, or some other board
which occupies these addresses, then 300-31F HEX are free to use. Addresses not specifically listed, such as
390-39F, are free.

Wait state jumper

The CIO-DAC02 board has a wait state jumper which you can set to enable an on-board wait state generator. A
wait state is an extra delay injected into the processor's clock via the bus. This delay slows down the processor
when the processor addresses the CIO-DAC02 board so that signals from slow devices (chips) will be valid.

This jumper is shown in Figure 3 configured for OFF (wait state is disabled).

Figure 3. Wait State jumper

The wait state generator on the CIO-DAC02 is only active when the CIO-DAC02 is being accessed. Your PC
will not be slowed down in general by using the wait state.

10

CIO-DAC02 User's Guide Installing the CIO-DAC02

-5 -10 X -5 -10 X

D/A 0 D/A 1

Voltage reference jumpers

The output voltage of the D/A converters is determined by the value of the reference voltage (VREF) and the
digital code written to the DACs (refer to the Analog outputs section on page 13). The VREF signal must be
supplied to each D/A or no voltage output will be present at the D/A's output pin. The VREF is supplied via
jumpers or from an external source.

A jumper block consisting of two rows of six pins is located on the upper right corner of the board. There are
two groups of pins — one for D/A 0 and one for D/A 1. Each group of pins provide a means of supplying either

-5V or -10V to each D/A.

The board is shipped with both the D/A 0 and D/A 1 VREF jumpers in the external (X) position. With jumpers
in the X position, the required D/A reference voltage(s) must be supplied to the 25-pin connector VREF input
pins.

A -5VREF provides a ±5V output on the D/A bipolar output, 0-5V output on the unipolar output and a 4-20
mA output on the current output.

If other ranges are desired, an external voltage between -10 and +10 volts should be supplied.

The on-board voltage reference jumper supplies the same signals available at the 25-pin connector directly to
the D/A VREF input, without the bother of looping the -5VREF or -10VREF outputs back into the D/A VREF
inputs, as is required with the MetraByte DAC-02.

Installing the CIO-DAC02

After you configure the board's switches and jumpers, you can install the CIO-DAC02 into your computer. To
install your board, follow the steps below.

Install the MCC DAQ software before you install your board

The driver needed to run your board is installed with the MCC DAQ software. Therefore, you need to install
the MCC DAQ software before you install your board. Refer to the Quick Start Guide for instructions on
installing the software.

1. Turn your computer off, open it up, and insert your board into an available ISA slot.

2. Close your computer and turn it on.

3. To test your installation and configure your board, run the InstaCal utility you installed in the previous

section. Refer to the Quick Start Guide that came with your board www.mccdaq.com/PDFmanuals/DAQ-

Software-Quick-Start.pdf for information on how to initially set up and load InstaCal.

Figure 4. Voltage reference jumpers

11

CIO-DAC02 User's Guide Installing the CIO-DAC02

Connector type

25-pin D type connector

Compatible cables

 C25FM-x
 DMCON-25 (D-connector, D-shell, and termination pins to construct your own

cable)

Compatible accessory products with
the C25FM-x cable

CIO-MINI25

Connecting the board for I/O operations

Connectors, cables – main I/O connector

The table below lists the board connector, applicable cables, and compatible accessory products.

Board connector, cables, and accessory equipment

Information on signal connections

General information regarding signal connection and configuration is available in the Guide to Signal
Connections (available at www.mccdaq.com/signals/signals.pdf).

Pinout – main I/O connector

The CIO-DAC02 I/O connector is a standard 25-pin male D connector that is accessible through the expansion
backplate.

Figure 5. I/O connector pin-out

Field wiring, signal termination, and conditioning

You can use the following cabling, screw termination, and signal conditioning products with the CIO-DAC02.

 CIO-MINI25 – 25-pin screw terminal board.
 DMCON-25 – Connector kit that includes a 25-pin male D-connector, D-shell, 25 crimp pins, and cable

termination kit to construct your own cable.

Details on these products are available on our web site at

www.mccdaq.com/products/screw_terminal_bnc.aspx.

12

+

-

UNIPOLAR OUT

4mA

4-20mA OUT

LLGND

Chapter 3

Functional Details

Analog outputs

Each D/A converter has three analog outputs; a unipolar voltage, a bipolar voltage and a 4-20 mA current
output. The range of the output is determined by the reference voltage selected on that D/A's VREF input. The
CIO-DAC02 provides two on-board jumper selectable reference voltages; -5V and -10V.

Choosing a VREF input of -5V provides a range of 0 to +5 volts on the unipolar output and ±5V on the bipolar
output. The 4-20 mA output is also available at this setting.

Choosing a VREF input of -10V provides a unipolar output of 0 to +10 volts and a ±10V bipolar output.

Choosing an external voltage reference will provide:

 A unipolar output equal to: VREF/4096 * (D/A value) * (-1)
 A bipolar output equal to: VREF/2048 * ( (D/A value) -2048 )

4-20 mA outputs

In addition to voltage outputs, each D/A can supply a 4-20 mA output with a resolution of 0.0039 mA per bit.
You can use the 4-20 mA outputs to control devices in a 4-20 mA control loop. The 4-20 mA current loop
circuit is a precision current sink employing a VMOS FET. A diode provides reverse hookup protection (see
Figure 6).

Select the on-board -5V reference for 4-20 mA use (see Figure 4 on page 11).

Figure 6. 4-20 mA loop output – simplified circuit diagram

13

CIO-DAC02 User's Guide Functional Details

GROUNDED

LOAD

LOAD

+

-

+

-

4-20mA

4-20mA

LLGND

LLGND

FLOATING

SUPPLY

FLOATING

GROUNDED

SUPPLY

A minimum of 8 VDC and a maximum of 36 VDC external excitation voltage is used to power the loop. A
typical application would use a 24 V loop supply. The loop may use either a grounded load (the supply
"floats"), or a grounded supply, (the load "floats"). Both methods are shown in Figure 7.

Figure 7. Loop grounding methods

14

D/A converter

AD7548

Resolution

12-bits

Number of channels

2 voltage or current output

Voltage ranges (Bipolar output)

±5 V, ±10 V and user range (determined by value of external reference between

-10 V and +10 V) jumper selectable

Voltage ranges (Unipolar output)

0 to 5 V, 0 to 10 V and user range (determined by the value of the external

reference between -10 V and +10 V) jumper selectable

Current ranges (Current output)

4 to 20 mA (using on-board or external -5 V reference)

D/A pacing

Software paced

Offset error

Adjustable to zero

Gain error

Adjustable to zero

Differential nonlinearity

±0.5 LSB max

Integral nonlinearity

±0.5 LSB max

Relative accuracy

±0.5 LSB (0.01%) max

Monotonicity

Guaranteed monotonic to 12 bits over temperature

Gain drift (internal referece)

±25 ppm/°C max

Offset drift

±3 ppm/°C max

Slew rate

0.3 V/µs typical

Current drive (voltage outputs)

±5 mA min

Voltage compliance (current out)

8 to 36 V

Output resistance (OP-07)

0.1 ohm max

Output short-circuit duration

40 mA min continuous

Miscellaneous

 Double buffered output latches
 7 kOhm min reference input resistance

Parameter

Conditions

Specification

Supply current

+5 V supply

135 mA typ, 300 mA max

+12 V supply

15 mA typ, 25 mA max

-12 V supply

25 mA typ, 35 mA max

Specifications

All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog output

Table 1. Analog input specifications

Chapter 4

Power consumption

Table 2. Power consumption specifications

15

CIO-DAC02 User's Guide Specifications

Operating temperature range

0 to 70 °C

Storage temperature range

-55 to 125 °C

Humidity

0 to 90% non-condensing

Connector type

25-pin "D" connector

Compatible cables

C25FM-x
DMCON-25 (D-connector, D-shell, and termination pins to construct your own cable)

Compatible accessory product
with the C25FM-x cable

CIO-MINI25

Pin

Signal Name

Pin

Signal Name

1

GND

14

-10V REF OUT

2

LLGND

15

-5V REF OUT

3

LLGND

16

D/A1 VREF Input

4

LLGND

17

D/A1 Bipolar

5

LLGND

18

D/A1 Unipolar

6

LLGND

19

D/A1 4-20 mA

7

LLGND

20

-10V REF OUT

8

LLGND

21

-5V REF OUT

9

LLGND

22

D/A0 VREF Input

10

LLGND

23

D/A0 Bipolar

11

LLGND

24

D/A0 Unipolar

12

LLGND

25

D/A0 4-20 mA

13

+5V PC

Environmental

Table 3. Environmental specifications

Main connector and pin out

Table 4. Connector specifications

Table 5. Connector pin out

16

Declaration of Conformity

Manufacturer: Measurement Computing Corporation
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA

Category: Electrical equipment for measurement, control and laboratory use.

Measurement Computing Corporation declares under sole responsibility that the product

CIO-DAC02

to which this declaration relates is in conformity with the relevant provisions of the following standards or
other documents:

EU EMC Directive 89/336/EEC: Electromagnetic Compatibility, EN55022 (1987), EN50082-1

Emissions: Group 1, Class B
 EN55022 (1987): Radiated and Conducted emissions.
Immunity: EN50082-1

 IEC 801-2 (1987): Electrostatic Discharge immunity, Criteria B.
 IEC 801-3 (1984): Radiated Electromagnetic Field immunity Criteria A.
 IEC 801-4 (1988): Electric Fast Transient Burst immunity Criteria B.

Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
December, 1995. Test records are outlined in Chomerics Test Report #EMI0168B.95.

We hereby declare that the equipment specified conforms to the above Directives and Standards.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation

10 Commerce Way

Suite 1008

Norton, Massachusetts 02766

[phone]

Fax: [phone]

E-mail: [e-mail]

www.mccdaq.com