CIO-DAC02/16
DUAL ANALOG OUTPUTS
User’s Manual
Revision 5
October, 2000
MEGA-FIFO, the CIO prefix to data acquisition board model numbers, the PCM prefix to data
acquisition board model numbers, PCM-DAS08, PCM-D24C3, PCM-DAC02, PCM-COM422,
PCM-COM485, PCM-DMM, PCM-DAS16D/12, PCM-DAS16S/12, PCM-DAS16D/16,
PCM-DAS16S/16, PCI-DAS6402/16, Universal Library, InstaCal, Harsh Environment
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Copyright 2000, Measurement Computing Corporation
HM CIO-DAC02-16.lwp
Table of Contents
1 INTRODUCTION ....................................
2 SOFTWARE INSTALLATION .........................
3 HARDWARE INSTALLATION ........................
4 CONNECTOR DIAGRAM .............................
5 DATA REGISTERS ..................................
6 SPECIFICATIONS ...................................
1
1
1
23.1 BASE ADDRESS .................................
33.2 SIMULTANEOUS TRANSFER JUMPER ..............
33.3 VOLTAGE RANGE SWITCHES .....................
43.4 INSTALLING THE CIO-DAC02/16 IN THE COMPUTER .
5
6
7
This page is blank.
1 INTRODUCTION
The CIO-DAC02/16 is a dual-channel analog output board having 16 bits of
resolution. One of six output voltage ranges can be individually selected for each
channel. Individual or simultaneous output updates are jumper-selectable.
2 SOFTWARE INSTALLATION
The board has a variety of switches and jumpers to set before installing the board in
your computer. By far the simplest way to configure your board is to use the
InstaCal
you all available options, how to configure the various switches and jumpers (as
applicable) to match your application 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.
TM
program provided as part of your software package. InstaCalTM will show
Please refer to the Extended Software Installation Manual regarding the installation
and operation of InstaCal
TM
. The following hard copy information is provided as a
matter of completeness, and will allow you to set the hardware configuration of the
board if you do not have immediate access to InstaCal
TM
and/or your computer.
3 HARDWARE INSTALLATION
The CIO-DAC02/16 has one bank of address switches, two range switches and one
jumper block which must be set before installing the board in your computer. T he
calibration and test program, InstaCal, included with the CIO-DAC02/16 will show
how these switches are to be set and may be run before you open your computer.
The factory defaults are:
300h (768 decimal)Base Address
5 VoltsOutput 1 (Ch 0) Range
+
+
5 VoltsOutput 2 (Ch 1) Range
UPDATE (individual update of DACs)UPDATE/XFER jumper
1
3.1 BASE ADDRESS
Unless there is already a board in
your system which uses address 300
hex (768 decimal), leave the switches
as they are set at the factory. Refer to
Table 3-1 for PC I/O addresses.
In the example shown in Figure 3-1,
the CIO-DAC02/16 is set for base
address 300 hex (768 decimal).
Table 3-1. PC I/O Addresses
FUNCTIONHEX
RANGE
070-071
MASK (AT)
0F0-0FF
(AT)
Figure 3-1. Base Address Switches
FUNCTIONHEX
RANGE
EGA2C0-2CF8237 DMA#1000-00F
EGA2D0-2DF8259 PIC #1020-021
GPIB (AT)2E0-2E78253 TIMER040-043
SERIAL PORT2E8-2EF8255 PPI (XT)060-063
SERIAL PORT2F8-2FF8742 CONTROLLER (AT)060-064
PROTOTYPE CARD300-30FCMOS RAM & NMI
PROTOTYPE CARD310-31FDMA PAGE REGISTERS080-08F
HARD DISK (XT)320-32F8259 PIC #2 (AT)0A0-0A1
PARALLEL PRINTER378-37FNMI MASK (XT)0A0-0AF
SDLC380-38F8237 #2 (AT)0C0-0DF
SDLC3A0-3AF80287 NUMERIC CO-P
MDA3B0-3BBHARD DISK (AT)1F0-1FF
PARALLEL PRINTER3BC-3BFGAME CONTROL200-20F
EGA3C0-3CFEXPANSION UNIT (XT)210-21F
CGA3D0-3DFBUS MOUSE238-23B
SERIAL PORT3E8-3EFALT BUS MOUSE23C-23F
FLOPPY DISK3F0-3F7PARALLEL PRINTER270-27F
SERIAL PORT3F8-3FFEGA2B0-2BF
2
3.2 SIMULTANEOUS TRANSFER JUMPER
Analog outputs can be jumpered so that new output data for one (or both) DACs is
held in the registers until any register is read. With this jumper in the XFER po sition,
when any register from BASE +0 to BASE +3
is read, both DACs are updated simultaneously
with data TRANSFERRED from the four
registers.
Figure 3-2 to the right shows the jumper block
in the individual UPDATE (default) position.
XFER UPDATE
JUMPER BLOCK - The jumper block
is in the Individual-Update position.
Figure 3-2. Simultaneous Transfer Jumper
Simultaneous transfer is useful if a system requires that a zero voltage be applied from
the CIO-DAC02/16 outputs at power up and reset.
The CIO-DAC02/16 outputs are set to 0 volts at power-up and reset but the data in the
data registers is not necessarily zero. To avoid a random value being output, use
simultaneous update mode and initialize all registers with appropriate values before
updating any channel.
3.3 VOLTAGE RANGE SWITCHES
The D/A converters on the CIO-DAC02/16 output a voltage according to the
equation:
Unipolar
Volts Out = (V
/ 65536 ) x Digital Value
FS
Bipolar
Volts Out = (V
/ 65536 ) x Digital Value − ( 0.5 x VFS)
FS
For example, in the 0 to 10V range with an output value of 50350:
Volts Out = (10/65536) * 50350 = 7.6828 volts
Two banks of DIP switches located upper left and right on the CIO-DAC02/16 are
used to set the voltage output range of the two DACs. The range of each DACs is set
according to the following switch settings Figure . Holding the board as it would sit in
the computer expansion slot, U means switch is UP, D means switch is DOWN.
3
Use Switch bank S1 to select the output range of Channel 0.
Use Switch bank S2 to select the output range of Channel 1.
Table 3-2. Range Selection Switch Positions
RANGE
10V
5V
2.5V
1
O
1
23
5
4
N
5432
DUDUD+
UDDUD+
DDDUD+
DUUDU0 to 10V
UDUDU0 to 5V
DDUDU0 to 2.5V
Range switches set for +10V
Figure 3-3. Range Switch Block - +10V Example Shown
3.4 INSTALLING THE CIO-DAC02/16 IN THE COMPUTER
1. Turn the power off.
2. Remove the cover of your computer. Be careful not to dislodge any of the cables
installed on the boards in your computer as you slide the cover off.
3. Locate an empty expansion slot in your computer.
4. Push the board firmly down into the expansion bus connector. If it is not seated
fully it may fail to work and could short circuit the PC bus power onto a PC bus
signal. This could damage the motherboard in your PC as well as the
CIO-DAC02/16.
4
The CIO-DAC02/16 signal connector is
a 25-pin, D-type female connector
accessible from the rear of the PC
through the expansion backplate
(Figure 4-1).
Use the C25FM-# cable with the
CIO-MINI25 screw terminal board for
easy signal connection.
As an alternative to a cable, you may
bring field signals to the 25-pin
connector with a DMCON-25 male
connector kit available from
Measurement Computing Corp.
4 CONNECTOR DIAGRAM
1
GND
LLGND
LLGND
LLGND
LLGND
LLGND
LLGND
LLGND
LLGND
LLGND
LLGND
LLGND
+5V PC
2
3
4
5
6
7
8
9
10
11
12
13
Figure 4-1. 25-Pin Connector Pin out
NC
14
NC
15
NC
16
D/A 1 VOUT
17
D/A 1 VOUT
18
NC
19
NC
20
NC
21
NC
22
D/A 0 VOUT
23
D/A 0 VOUT
24
25
NC
5
5 DATA REGISTERS
The CIO-DAC02/16 has four analog-output data registers. There are two for each
channel, one for the lower eight bits and one for the upper eight bits. The first address
(BASE ADDRESS) is determined by setting a bank of DIP switches on the board.
The information presented in this chapter is intended for exp e rienced programmers. If
you are not familiar with register manipulation, we encourage you to use the Universal
Library.
To write to or read from a register in decimal or HEX, the following weights apply:
HEX VALUEDECIMAL VALUEBIT POSITION
110
221
442
883
10164
20325
40646
801287
The registers and their function are listed on Table 5-1.
Table 5-1. Data Registers
Initiate simultaneous update.D/A 0 Least Significant ByteBASE + 0
Initiate simultaneous update.D/A 0 Most Significant ByteBASE + 1
Initiate simultaneous update.D/A 1 Least Significant ByteBASE + 2
Initiate simultaneous update.D/A 1 Most Significant ByteBASE + 3
The bits of the registers are labeled as follows:
BASE + 0 and BASE +2 (LEAST SIGNIFICANT BYTE)
BASE + 1 and BASE +3 (MOST SIGNIFICANT BYTE)
(MSB)
6
READ FUNCTIONWRITE FUNCTIONADDRESS
01234567
DA15DA14DA13DA12DA11DA10DA9
DA16
(LSB)
01234567
DA8DA7DA6DA5DA4DA3DA2DA1
POWER CONSUMPTION
ANALOG OUTPUTS
Slew Rate
Settling Time
20 Volt Step to 0.0008%
10 Volt Step to 0.0008%
6 SPECIFICATIONS
400 mA Typical / 675 mA Max.+ 5V Supply
None+ 12V Supply
None- 12V Supply
2Outputs
16 Bits (1 in 65536 parts)Resolution
AD660BNType
10, +5, +2.5, 0 to 10, 0 to 5, 0 to 2.5Output Ranges
+
Double-BufferedLatches
Individual or Simultaneous (Jumper Select)Update
DAC Output forced to 0 VoltsPower Up/Reset
Adjustable to 0Offset Error
Adjustable to 0Gain Error
1 LSB Max.Differential Linearity
+
1 LSB Max.Integral Non linearity
+
Guaranteed to 15 bits over temp rangeMonotonicity
15 ppm/C MaxGain Drift
+
5 ppm/C MaxBipolar Offset Drift
+
3 ppm/C MaxUnipolar Offset Drift
+
2.8V/µs Typical
12 µs typical, 19 µs max
6 µs typical, 9 µs max
5 mA MinCurrent Drive
+
0.1 Ohm MaxOutput Resistance (Op27)
40 mA Min ContinuousOutput Short Circuit Duration
ENVIRONMENTAL
Storage Temperature
0 to 70 Deg. COperating Temperature
−40 to +100 Deg. C
0 to 90% Non-condensingHumidity
7
For your notes.
8
For your notes.
9
For your notes.
10
EC Declaration of Conformity
We, Measurement Computing Corporation, declare under sole responsibility that the
product:
CIO-DAC02/16
DescriptionPart Number
to which this declaration relates, meets the essential requirements, is in conformity
with, and CE marking has been applied according to the relevant EC Directives listed
below using the relevant section of the following EC standards and other normative
documents:
EU EMC Directive 89/336/EEC
compatibility.
EU 55022 Class B
characteristics of information technology equipment.
EN 50082-1
IEC 801-2
and control equipment.
IEC 801-3
measurements and control equipment.
IEC 801-4
equipment.
Carl Haapaoja, Director of Quality Assurance
: Electrostatic discharge requirements for industrial process measurement
: Radiated electromagnetic field requirements for industrial process
: Electrically fast transients for industrial process measurement and control
: Limits and methods of measurements of radio interference
: EC generic immunity requirements.
: Essential requirements relating to electromagnetic
Measurement Computing Corporation
Measurement Computing Corporation
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Fax: (508) 946-9500
E-mail: info@mccdaq.com
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