Measurement Computing PCI-DAS1602/16 User manual

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PCI·DAS1602/16
Analog and Digital 1/0 Board
User's Guide
F£ .... ~4 MEASUREMENT
~,~ .... COMPUTING TM

PCI-DAS1602/16
Analog and Digital I/O Board
User’s Guide
Document Revision 7, March, 2009
© Copyright 2009, Measurement Computing Corporation

2
HM PCI-DAS1602_16.doc
Your new Measurement Computing product comes with a fantastic extra —
Management committed to your satisfaction!
Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now enjoy
the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our mission:
To provide PC-based data acquisition hardware and software that will save time and save money.
Simple installations minimize the time between setting up your system and actually making measurements. We offer quick and
simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system.
Limited Lifetime Warranty: Most MCC products are covered by a limited lifetime warranty against defects in materials or
workmanship for the life of the product, to the original purchaser, unless otherwise noted. Any products found to be defective in
material or workmanship will be repaired, replaced with same or similar device, or refunded at MCC’s discretion. For specific
information, please refer to the terms and conditions of sale.
Harsh Environment Program: Any Measurement Computing product that is damaged due to misuse, or any reason, may be
eligible for replacement with the same or similar device for 50% of the current list price. I/O boards face some harsh
environments, some harsher than the boards are designed to withstand. Contact MCC to determine your product’s eligibility for
this program.
30 Day Money-Back Guarantee: Any Measurement Computing Corporation product may be returned within 30 days of
purchase for a full refund of the price paid for the product being returned. If you are not satisfied, or chose the wrong product by
mistake, you do not have to keep it.
These warranties are in lieu of all other warranties, expressed or implied, including any implied warranty of merchantability or
fitness for a particular application. The remedies provided herein are the buyer’s sole and exclusive remedies. Neither
Measurement Computing Corporation, nor its employees shall be liable for any direct or indirect, special, incidental or
consequential damage arising from the use of its products, even if Measurement Computing Corporation has been notified in
advance of the possibility of such damages.

3
Trademark and Copyright Information
TracerDAQ, Universal Library, Measurement Computing Corporation, and the Measurement Computing logo are either
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All other trademarks are the property of their respective owners.
Information furnished by Measurement Computing Corporation is believed to be accurate and reliable. However, no
responsibility is assumed by Measurement Computing Corporation neither for its use; nor for any infringements of patents or
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All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form by
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Measurement Computing Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use
in life support systems and/or devices without prior written consent from Measurement Computing Corporation.
Life support devices/systems are devices or systems which, a) are intended for surgical implantation into the body,
or b) support or sustain life and whose failure to perform can be reasonably expected to result in injury.
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 PCI-DAS1602/16.........................................................................................................7
Overview: PCI-DAS1602/16 features................................................................................................................7
Software features................................................................................................................................................7
Chapter 2
Installing the PCI-DAS1602/16.............................................................................................................8
What comes with your PCI-DAS1602/16 shipment?.........................................................................................8
Hardware .......................................................................................................................................................................... 8
Additional documentation................................................................................................................................................. 8
Optional components........................................................................................................................................................ 8
Unpacking the PCI-DAS1602/16.......................................................................................................................9
Installing the software ........................................................................................................................................9
Installing the PCI-DAS1602/16 .........................................................................................................................9
Configuring the PCI-DAS1602/16.....................................................................................................................9
Connecting the board for I/O operations..........................................................................................................10
Connectors, cables –main I/O connector ........................................................................................................................10
Pinout –main I/O connector............................................................................................................................................11
Cabling.............................................................................................................................................................................12
Field wiring and signal termination .................................................................................................................................13
Chapter 3
Functional Details...............................................................................................................................15
PCI-DAS1602/16 block diagram .....................................................................................................................15
Analog inputs ...................................................................................................................................................15
Burst mode.......................................................................................................................................................................16
Analog outputs .................................................................................................................................................17
Parallel digital I/O ............................................................................................................................................17
Counter/timer I/O .............................................................................................................................................17
Chapter 4
Calibrating the PCI-DAS1602/16........................................................................................................18
Analog input calibration...................................................................................................................................18
Analog output calibration.................................................................................................................................19
Chapter 5
Specifications......................................................................................................................................20
Analog input.....................................................................................................................................................20
Accuracy..........................................................................................................................................................................21
Analog input drift ............................................................................................................................................................21
Noise performance...........................................................................................................................................................22
Crosstalk..........................................................................................................................................................................22
Analog output...................................................................................................................................................23
Accuracy..........................................................................................................................................................................23
Analog output drift ..........................................................................................................................................................23

PCI-DAS1602/16 User's Guide
5
Digital input / output ........................................................................................................................................24
Interrupts ..........................................................................................................................................................24
Counter.............................................................................................................................................................25
Power consumption ..........................................................................................................................................25
Environmental ..................................................................................................................................................26
Mechanical .......................................................................................................................................................26
Main connector and pin out..............................................................................................................................26
Declaration of Conformity..................................................................................................................29

6
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 PCI-DAS1602/16 board so that you get the
most out of its analog, digital, and timing I/O 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
For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.
Caution! 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
The following electronic documents provide helpful information relevant to the operation of the PCI-
DAS1602/16.
MCC's Specifications: PCI-DAS1602/16 (the PDF version of the Specifications chapter in this guide) is
available on our web site at www.mccdaq.com/pdfs/Specs/PCI-DAS1602-16-spec.pdf.
MCC's Quick Start Guide is available on our web site at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
MCC's Guide to Signal Connections is available on our web site at
www.mccdaq.com/signals/signals.pdf.
MCC's Universal Library User's Guide is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf.
MCC's Universal Library Function Reference is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-functions.pdf.
MCC's Universal Library for LabVIEW™User’s Guide is available on our web site at
www.mccdaq.com/PDFmanuals/SM-UL-LabVIEW.pdf.
PCI-DAS1602/16 User's Guide (this document) is also available on our web site at
www.mccdaq.com/PDFmanuals/PCI-DAS1602-16.pdf.

7
Chapter 1
Introducing the PCI-DAS1602/16
Overview: PCI-DAS1602/16 features
The PCI-DAS1602/16 multifunction analog and digital I/O board sets a new standard for high performance
data acquisition on the PCI bus. This manual explains how to install and use the PCI-DAS1602/16 board.
The PCI-DAS1602/16 is a multifunction measurement and control board designed for the PCI bus. This board
can be used for applications such as data acquisition, system timing, and industrial process control.
The PCI-DAS1602/16 board is completely plug and play, with no switches, jumpers or potentiometers to set.
All board addresses and interrupt sources are set with software. You calibrate the board with software that uses
programmable on-board digital potentiometers and trim D/A converters.
The PCI-DAS1602/16 provides the following features:
Eight differential or 16 single-ended 16-bit analog inputs
Sample rates of up to 200 kHz
24 bits of high-drive digital I/O
Three 16-bit down counters
100-pin high density I/O connector
Two FIFO buffered 16-bit analog outputs with update rates of up to 100 kHz
Analog input ranges are selectable via software as bipolar or unipolar. Bipolar input ranges are ±10 V, ±5 V,
±2.5 V and ±1.25 V. Unipolar input ranges are 0 to 10 V, 0 to 5 V, 0 to 2.5 V and 0 to 1.25 V. The PCI-
DAS1602/16 has an analog trigger input. The trigger level and direction are software configurable.
The PCI-DAS1602/16 board has two 82C54 counter chips. Each chip contains three 16-bit down counters that
provide clock, gate, and output connections.
Software features
For information on the features of InstaCal and the other software included with your PCI-DAS1602/16, refer
to the Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
Check www.mccdaq.com/download.htm for the latest software version.

8
Chapter 2
Installing the PCI-DAS1602/16
What comes with your PCI-DAS1602/16 shipment?
The following items are shipped with the PCI-DAS1602/16.
Hardware
PCI-DAS1602/16
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 PCI-DAS1602/16 and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.
Optional components
Cables
C100FF-x
Signal termination and conditioning accessories
MCC provides signal conditioning and termination products for use with the PCI-DAS1602/16. Refer to
Field wiring and signal termination on page 13 for a complete list of compatible accessory products.

PCI-DAS1602/16 User's Guide Installing the PCI-DAS1602/16
9
Unpacking the PCI-DAS1602/16
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the PCI-DAS1602/16 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: [email protected]
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.
Installing the PCI-DAS1602/16
The PCI-DAS1602/16 board is completely plug-and-play, with no switches or jumpers to set. Configuration is
controlled by your system's BIOS. 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 PCI slot.
2. Close your computer and turn it on.
If you are using an operating system with support for plug-and-play (such as Windows 2000 or
Windows XP), a dialog box opens as the system loads, indicating that new hardware has been detected. If
the information file for this board is not already loaded onto your PC, you are prompted for the disk
containing this file. The Measurement Computing Data Acquisition Software CD supplied with your board
contains this file. If required, insert the disk or CD and click OK.
3. To test your installation and configure your board, run the InstaCal utility installed in the previous section.
Refer to the Quick Start Guide that came with your board for information on how to initially set up and
load InstaCal.
If your board has been powered-off for more than 10 minutes, allow your computer to warm up for at least
15 minutes before acquiring data with this board. This warm-up period is required for the board to achieve its
rated accuracy. The high speed components used on the board generate heat, and it takes this amount of time
for a board to reach steady state if it has been powered off for more than 10 minutes.
Configuring the PCI-DAS1602/16
All hardware configuration options on the PCI-DAS1602/16 are software controlled. You can select some of
the configuration options using InstaCal, such as the analog input configuration (16 single-ended or eight
differential channels), the edge used for triggering when using an external pacer, and the counter source. Once
selected, any program that uses the Universal Library initializes the hardware according to these selections.

PCI-DAS1602/16 User's Guide Installing the PCI-DAS1602/16
10
Connecting the board for I/O operations
Connectors, cables –main I/O connector
The table below lists the board connectors, applicable cables, and compatible accessory products for the PCI-
DAS1602/16.
Board connector, cables, and accessory equipment
Connector type
100-pin high-density Robinson-Nugent
Compatible cables
C100FF-x
Compatible accessory
products with the
C100FF-x cable
ISO-RACK16/P
ISO-DA02/P
BNC-16SE
BNC-16DI
CIO-MINI50
CIO-TERM100
SCB-50
SSR-RACK24 (DADP-5037 adaptor required)
SSR-RACK08 (DADP-5037 with TN-MC78M05CT adaptor required)
CIO-ERB24 (DADP-5037 adaptor required)
CIO-ERB08 (DADP-5037 adaptor required)
CIO-SERB08 (DADP-5037 adaptor required)
The PCI-DAS1602/16 board's main I/O connector is a 100-pin high density connector labeled J1. All signals
pass through this connector. The pinout for eight-channel differential mode is shown on page 11. The pinout for
16-channel single ended mode is shown on page 12.
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).
Caution! When connecting a cable to the board's I/O connector, make sure that the arrow indicating pin 1
on the board connector lines up with the arrow indicating pin 1 on the cable connector.
Connecting cables can damage the board and the I/O controller.

PCI-DAS1602/16 User's Guide Installing the PCI-DAS1602/16
11
Pinout –main I/O connector
8-channel differential mode pin out
Signal Name
Pin
Pin
Signal Name
GND
100
■
■
50
GND
EXTERNAL INTERRUPT
99
■
■
49
SSH OUT
N/C
98
■
■
48
PC +5 V
EXTERNAL D/A PACER GATE
97
■
■
47
N/C
D/A INTERNAL PACER OUTPUT
96
■
■
46
N/C
A/D INTERNAL PACER OUTPUT
95
■
■
45
A/D EXTERNAL TRIGGER IN
N/C
94
■
■
44
D/A EXTERNAL PACER IN
N/C
93
■
■
43
ANALOG TRIGGER IN
-12 V
92
■
■
42
A/D EXTERNAL PACER
GND
91
■
■
41
CTR 4 OUT
+12 V
90
■
■
40
CTR 4 GATE
GND
89
■
■
39
CTR 4 CLK
N/C
88
■
■
38
D/A OUT 1
N/C
87
■
■
37
D/A GND 1
N/C
86
■
■
36
D/A OUT 0
N/C
85
■
■
35
D/A GND 0
N/C
84
■
■
34
N/C
N/C
83
■
■
33
N/C
N/C
82
■
■
32
N/C
N/C
81
■
■
31
N/C
N/C
80
■
■
30
N/C
N/C
79
■
■
29
N/C
N/C
78
■
■
28
N/C
N/C
77
■
■
27
N/C
N/C
76
■
■
26
N/C
N/C
75
■
■
25
N/C
FIRSTPORTC Bit 7
74
■
■
24
N/C
FIRSTPORTC Bit 6
73
■
■
23
N/C
FIRSTPORTC Bit 5
72
■
■
22
N/C
FIRSTPORTC Bit 4
71
■
■
21
N/C
FIRSTPORTC Bit 3
70
■
■
20
N/C
FIRSTPORTC Bit 2
69
■
■
19
N/C
FIRSTPORTC Bit 1
68
■
■
18
LLGND
FIRSTPORTC Bit 0
67
■
■
17
CH7 LO
FIRSTPORTB Bit 7
66
■
■
16
CH7 HI
FIRSTPORTB Bit 6
65
■
■
15
CH6 LO
FIRSTPORTB Bit 5
64
■
■
14
CH6 HI
FIRSTPORTB Bit 4
63
■
■
13
CH5 LO
FIRSTPORTB Bit 3
62
■
■
12
CH5 HI
FIRSTPORTB Bit 2
61
■
■
11
CH4 LO
FIRSTPORTB Bit 1
60
■
■
10
CH4 HI
FIRSTPORTB Bit 0
59
■
■
9
CH3 LO
FIRSTPORTA Bit 7
58
■
■
8
CH3 HI
FIRSTPORTA Bit 6
57
■
■
7
CH2 LO
FIRSTPORTA Bit 5
56
■
■
6
CH2 HI
FIRSTPORTA Bit 4
55
■
■
5
CH1 LO
FIRSTPORTA Bit 3
54
■
■
4
CH1 HI
FIRSTPORTA Bit2
53
■
■
3
CH0 LO
FIRSTPORTA Bit 1
52
■
■
2
CH0 HI
FIRSTPORTA Bit 0
51
■
■
1
LLGND
PCI slot ↓

PCI-DAS1602/16 User's Guide Installing the PCI-DAS1602/16
12
16-channel single-ended mode pin out
Signal Name
Pin
Pin
Signal Name
GND
100
■
■
50
GND
EXTERNAL INTERRUPT
99
■
■
49
SSH OUT
N/C
98
■
■
48
PC +5 V
EXTERNAL D/A PACER GATE
97
■
■
47
N/C
D/A INTERNAL PACER OUTPUT
96
■
■
46
N/C
A/D INTERNAL PACER OUTPUT
95
■
■
45
A/D EXTERNAL TRIGGER IN
N/C
94
■
■
44
D/A EXTERNAL PACER IN
N/C
93
■
■
43
ANALOG TRIGGER IN
-12 V
92
■
■
42
A/D EXTERNAL PACER
GND
91
■
■
41
CTR 4 OUT
+12 V
90
■
■
40
CTR 4 GATE
GND
89
■
■
39
CTR 4 CLK
N/C
88
■
■
38
D/A OUT 1
N/C
87
■
■
37
D/A GND 1
N/C
86
■
■
36
D/A OUT 0
N/C
85
■
■
35
D/A GND 0
N/C
84
■
■
34
N/C
N/C
83
■
■
33
N/C
N/C
82
■
■
32
N/C
N/C
81
■
■
31
N/C
N/C
80
■
■
30
N/C
N/C
79
■
■
29
N/C
N/C
78
■
■
28
N/C
N/C
77
■
■
27
N/C
N/C
76
■
■
26
N/C
N/C
75
■
■
25
N/C
FIRSTPORTC Bit 7
74
■
■
24
N/C
FIRSTPORTC Bit 6
73
■
■
23
N/C
FIRSTPORTC Bit 5
72
■
■
22
N/C
FIRSTPORTC Bit 4
71
■
■
21
N/C
FIRSTPORTC Bit 3
70
■
■
20
N/C
FIRSTPORTC Bit 2
69
■
■
19
N/C
FIRSTPORTC Bit 1
68
■
■
18
LLGND
FIRSTPORTC Bit 0
67
■
■
17
CH15 HI
FIRSTPORTB Bit 7
66
■
■
16
CH7 HI
FIRSTPORTB Bit 6
65
■
■
15
CH14 HI
FIRSTPORTB Bit 5
64
■
■
14
CH6 HI
FIRSTPORTB Bit 4
63
■
■
13
CH13 HI
FIRSTPORTB Bit 3
62
■
■
12
CH5 HI
FIRSTPORTB Bit 2
61
■
■
11
CH12 HI
FIRSTPORTB Bit 1
60
■
■
10
CH4 HI
FIRSTPORTB Bit 0
59
■
■
9
CH11 HI
FIRSTPORTA Bit 7
58
■
■
8
CH3 HI
FIRSTPORTA Bit 6
57
■
■
7
CH10 HI
FIRSTPORTA Bit 5
56
■
■
6
CH2 HI
FIRSTPORTA Bit 4
55
■
■
5
CH9 HI
FIRSTPORTA Bit 3
54
■
■
4
CH1 HI
FIRSTPORTA Bit 2
53
■
■
3
CH8 HI
FIRSTPORTA Bit 1
52
■
■
2
CH0 HI
FIRSTPORTA Bit 0
51
■
■
1
LLGND
PCI slot ↓
The signal names for pins 2 to 17 define the functions for both single-ended modes and also for differential
input modes. For example, if you are using eight differential inputs, pin 2 is the high side of channel 0 (CH0
HI) and pin 3 is the low side (CH0 LO) of channel 0. If you are using single-ended inputs, pin 2 is channel 0
(CH0 HI), but pin 3 is now channel 8 (CH8 HI). When you use single-ended inputs, use LLGND (and not
GND) for analog signal returns.
Cabling
You can use a C100FF-xcable to connect signals to the PCI-DAS1602/16 board. The C100FF-x cable is made
up of two 50-pin ribbon cables that are joined at one end with a 100-pin connector. The two 50-pin cables
diverge and are terminated at the other end with standard 50-pin header connectors.

PCI-DAS1602/16 User's Guide Installing the PCI-DAS1602/16
13
1
50
2
49
51
100
52
99
10050
511
Key
Key
The red stripe
identifies pin # 1
The red stripe
identifies pin # 51
Cable is labeled
“Pins 51-100”
Cable is labeled
“Pins 1-50”
Field Wiring connections:
SCB-50
CIO-MINI50
CIO-MINI50/DST
CIO-TERM100/DST
BNC-16DI or BNC-16SE
ISO-RACK16/P or ISO-DA02/P
with the DADP-5037 adaptor board:
CIO-ERB08 or CIO-ERB24
SSR-RACK08 or SSR-RACK24
Connect to the board’s
100-pin I/O connector.
Pin 1 is indicated by an
arrow on the connector.
Figure 1. C100FF-xcable
The first 50-pin connector is used primarily for analog signals (pins 1-50 on the 100-pin connector). The
second 50-pin connector is used primarily for digital signals (pins 51-100 on the 100-pin connector). This
configuration minimizes noise in the analog signal lines, and greatly simplifies field wiring and connections to
external devices. You can purchase C100FF-x series cables from our web site at
www.mccdaq.com/products/accessories.aspx.
Field wiring and signal termination
You can use the following MCC screw terminal boards to terminate field signals and route them into the PCI-
DAS1602/16 board using the C100FF-xcable:
Screw terminal boards
CIO-TERM100 –100 pin, 16 x 4 screw terminal board.
CIO-MINI50 –50-pin universal screw terminal accessory. Two boards are required.
SCB-50 –50-conductor, shielded signal connection/screw terminal box providing two independent 50-pin
connections. One box is required.
Details on these products are available at www.mccdaq.com/products/screw_terminal_bnc.aspx.
BNC connector interface boxes
BNC-16SE –16-channel single-ended BNC connector box.
BNC-16DI –Eight-channel differential BNC connector box.
Details on these products are available at www.mccdaq.com/products/screw_terminal_bnc.aspx.

PCI-DAS1602/16 User's Guide Installing the PCI-DAS1602/16
14
Analog signal conditioning and expansion
ISO-RACK16/P –16-channel isolation module mounting rack.
ISO-DA02/P –Two-channel, 5B module rack.
Details on these products are available at www.mccdaq.com/products/signal_conditioning.aspx.
Digital signal conditioning
The following digital signal conditioning products have 37-pin connectors. Use the DADP-5037 adaptor board
for connections to the C100FF-x cable's 50-pin connectors.
SSR-RACK24 –24-position solid state relay rack. The DADP-5037 adaptor board is required.
SSR-RACK08 –Eight-channel solid state relay rack. The DADP-5037 with TN-MC78M05CT adaptor
board is required.
CIO-ERB24 –24-channel electromechanical relay accessory for digital I/O boards. The DADP-5037
adaptor board is required.
CIO-ERB08 –Eight-channel electromechanical relay accessory for digital I/O boards. The DADP-5037
adaptor board is required.
Details on digital signal conditioning products are available at
www.mccdaq.com/products/signal_conditioning.aspx. Details on the DADP-5037 adapter board are available
at www.mccdaq.com/products/accessories.aspx.
Caution! Before connecting signals to the PCI-DAS1602/16, measure the voltage between ground at the
signal source and ground at the PC. If you measure >10 volts, do not connect the board to this
signal source, as you are beyond the usable input range of the board. Either adjust your grounding
system or add isolation signal conditioning to take useful measurements. A ground offset voltage
of more than 30 volts may damage the board and possibly your computer. An offset voltage much
greater than 30 volts will damage your electronics, and may be hazardous to your health.
To terminate signals and route them into the PCI-DAS1602/16, use the SCB-50 signal connection box,
CIO-TERM100 screw terminal board, or two CIO-MINI50 screw terminal boards.
SCB-50, CIO-MINI50,
CIO-TERM100 or
analog signal conditioning
PCI-DAS1602/16
100-pin I/O connector
Analog I/O pins
1 to 50
Digital I/O pins
51 to 100
IN
IN
SCB-50, CIO-MINI50,
CIO-TERM100 or
digital signal conditioning
C100FF-x
Figure 2. Sample wiring configuration using the C100FF-x cable

15
Chapter 3
Functional Details
PCI-DAS1602/16 block diagram
The PCI-DAS1602/16 provides the following features:
16 single-ended or eight fully differential 16-bit analog inputs
Two 16-bit analog outputs
24-bits, high current digital I/O
Three 16-bit down counters
PCI-DAS1602/16 functions are illustrated in the block diagram shown here.
FIRSTPORTA
Control
FIRSTPORTA (7:0)
High-Drive DIO
8
PCI
CONTROLLER
BADR1
BADR2
BADR3
BADR4
Interrupt
Boot
EEPROM
ADC
Pacer
Control
Scan
&
Burst
Logic
HS
DAC
Control
Trigger
Control DAC Pacer Control
Decode/Status Int
Ctl
Bus
Timing
EXT
PCR
10MHz
INT
XINT
Burst/Scan
XTRIG
CONTROLLER
FPGA
Analog
Trigger
Logic
TRIG_HI
Analog
Trigger
TRIG_LO
ADC
Pacer
CTR 2
CTR 1
Sample
Counter
CTR0
Control
Gain and Offset Autocal
INT
16-Bit, 200KHz
Mux
&
Gain
Analog In
16 CH S.E.
8 CH DIFF.
512 x 16
FIFO
Gain and Offset Autocal
DAC
Data
Control
D/A 0
D/A 1
512 X 16
FIFO
DAC
Pacer
CTR2
CTR1
ADC
Index
Counter
User
CTR 0
Control
Time Base GATE
CLK
OUT
INT
XTRIG
Start EOC
DAC0
DAC1
16-Bit, 100KHz
16-Bit, 100KHz
INT
10MHz
LOCAL BUS
PCI BUS (5V, 32-BIT, 33MHZ)
FIRSTPORTB (7:0)
FIRSTPORTCH (3:0)
FIRSTPORTB
FIRSTPORTCH
INT
FIRSTPORTCLFIRSTPORTCL (3:0)
Figure 3. PCI-DAS1602/16 functional block diagram
Analog inputs
The analog input mode is software-selectable for eight differential or 16 single-ended analog inputs. The board
offers a 200 kHz maximum sample rate in single and multichannel scans at any gain setting. A 512 sample
FIFO assures that data taken from the board is transferred into computer memory without the possibility of
missed samples. The board has an analog trigger input with software-selectable trigger levels and direction.

PCI-DAS1602/16 User's Guide Functional Details
16
Software selects the bipolar/unipolar input configuration and input range. The table below lists the analog input
ranges and resolutions for the available input configurations and gains.
Input range and resolution
Bipolar Range
Resolution
Unipolar Range
Resolution
±10 V
305 µV
0 to 10 V
153 µV
±5 V
153 µV
0 to 5 V
76.3 µV
±2.5 V
76.3 µV
0 to 2.5 V
38.1 µV
±1.25 V
38.1 µV
0 to 1.25 V
19.1 µV
Burst mode
Channel-to-channel skew results from multiplexing the A/D inputs. It is defined as the time between
consecutive samples. For example, if four channels are sampled at a rate of 1 kHz per channel, the channel
skew is 250 µs (1 ms/4).
Burst mode minimizes channel-to-channel skew by clocking the A/D at the maximum rate between successive
channels. Burst mode timing is illustrated in Figure 4. At the 1-ms pulse, channel 0 is sampled. After 5 µs,
channel 2 is sampled. Channel 3 is sampled 5 µs after channel 2 is sampled. No samples are then taken until the
next 1-ms pulse, when channel 0 is sampled again. In this mode, the rate for all channels is 1 kHz, but the
channel-to-channel skew (delay) is now 5 µs, or 20 µs total. The minimum burst mode skew/delay on the PCI-
DAS1602/16 is 5 µs.
CH0
CH1
CH2
CH3
CH0
CH1
CH2
CH3
Delay
The length of the delay between bursts is
set by one of the internal counters, or may
be controlled via the external trigger.
5µS
Burst mode pacer is
fixed at 5.0 µS
Figure 4. Burst mode timing

PCI-DAS1602/16 User's Guide Functional Details
17
Analog outputs
The two high-speed 16-bit dual analog outputs are updated via an on-board FIFO and REP OUTSW
commands, and provide a 100 kHz maximum update rate. Output ranges are individually configurable with
software for ±10 V and ±5 V, 0 to 10 V and 0 to 5 V. The D/A outputs provide rated accuracy to ±5 mA, and
are short circuit protected (25 mA limit). The analog outputs are cleared to 0 V on power up or reset.
Parallel digital I/O
The 24 bits of TTL-compatible, high-current (64 mA sink, 15 mA source) digital I/O are available as two eight-
bit ports and two four-bit ports. This digital capability is an 82C55 mode 0 chip emulation, which allows each
port to be configured independently as either input or output. The digital I/O ports default to the input state
(high impedance) on power up or reset.
Counter/timer I/O
The PCI-DAS1602/16 provides two counter 82C54 counter chips. Each chip contains three 16-bit down
counters that provide clock, gate, and output connections. You can connect the counter clock to the on-board
10 MHz crystal oscillator, or leave unconnected for user input.

18
Chapter 4
Calibrating the PCI-DAS1602/16
The PCI-DAS1602/16 is equipped with software auto calibration. The InstaCal software makes gain and offset
corrections to the board using on-board digital potentiometers and trim D/A converters. No user intervention or
external equipment is required. The PCI-DAS1602/16 is shipped fully-calibrated from the factory.
All adjustments are made via 8-bit calibration DACs or 7-bit digital potentiometers that are referenced to an on-
board factory calibrated standard. Calibration factors are stored on the serial nvRAM. At run time, these
calibration factors can be loaded into system memory and can be automatically retrieved when a different
DAC/ADC range is specified
You can recalibrate with respect to the factory-measured voltage standards at any time by selecting the
Calibrate menu in InstaCal. Full calibration requires less than two minutes and requires no external equipment
or user adjustments.
The standard calibration involves calibrating one channel with 0 volts input (offset), and then with a known
input voltage (gain). The PCI-DAS1602/16's on board circuitry first shorts the inputs for offset calibration, then
connects the inputs to the ultra-stable precision voltage reference for the gain calibration.
Analog input calibration
Analog inputs are calibrated for offset and gain. Offset calibration is performed directly on the input amplifier
with trim DACs acting on the amplifier. Input gain calibration is performed with the precision voltage
reference.
Front-end offset corrections are typically performed at the gain stage and/or the ADC input. Offset calibration
is performed in the instrumentation amplifier gain stage. Front-end gain adjustment is only performed via the
ADC reference, since the gain tolerance of the in-amp circuit is quite good, and there is adequate gain tuning
range using only the ADC.
The analog input calibration system is shown in Figure 5.
Calibration
Reference
Analog In
Offset
Adjust Unipolar/ Bipolar
Trim DAC
ADC
Offset
Adjust Ref.
Digital Offset
Pot. Digital Gain Pot.
Figure 5. Analog input calibration