United Electronic Industries DNR-AI-207 User manual

DNx-AI-207
—
User Manual
16-Channel, 18-bit, Sequential Sampling, Differential
Analog Input Board with Cold-Junction Compensation
for the PowerDNA Cube and RACK Series Chassis
December 2017
PN Man-DNx-AI-207
© Copyright 1998-2017 United Electronic Industries, Inc. All rights reserved.

No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form
by any means, electronic, mechanical, by photocopying, recording, or otherwise without prior written
permission.
Information furnished in this manual is believed to be accurate and reliable. However, no responsibility
is assumed for its use, or for any infringement of patents or other rights of third parties that may result
from its use.
All product names listed are trademarks or trade names of their respective companies.
See the UEI website for complete terms and conditions of sale:
http://www.ueidaq.com/cms/terms-and-conditions/
Contacting United Electronic Industries
Mailing Address:
27 Renmar Avenue
Walpole, MA 02081
U.S.A.
For a list of our distributors and partners in the US and around the world, please contact a member of our
support team:
Support:
Telephone: [phone]
Fax: [phone]
Also see the FAQs and online “Live Help” feature on our web site.
Internet Support:
Support:[email protected]
Website: www.ueidaq.com
FTP Site: ftp://ftp.ueidaq.com
Product Disclaimer:
WARNING!
DO NOT USE PRODUCTS SOLD BY UNITED ELECTRONIC INDUSTRIES, INC. AS CRITICAL
COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS.
Products sold by United Electronic Industries, Inc. are not authorized for use as critical components in
life support devices or systems.A critical component is any component of a life support device or
system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.Any attempt to purchase any United Electronic
Industries, Inc. product for that purpose is null and void and United Electronic Industries Inc. accepts
no liability whatsoever in contract, tort, or otherwise whether or not resulting from our or our
employees' negligence or failure to detect an improper purchase.
Specifications in this document are subject to change without notice. Check with UEI for
current status.

DNx-AI-207 Analog Input Board i
Table of Contents
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
Table of Contents
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Organization of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 The AI-207 Board Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.1 ADC Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.2 Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.3 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.4 Software Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Device Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5.1 Multiplexer & Programmable Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.2 Maximum Sample Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.3 Autozero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5.4 Oversampling Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5.5 Data Storage and Timestamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7 Connectors and Wiring (pinout) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.7.1 Analog Input Ground Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.8 Data Representation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8.1 CJC Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 2 Programming with the High-Level API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1 About the High-level Framework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 Creating a Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Configuring Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.1 Voltage Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.2 Thermocouple Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.4 Configuring Autozero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.5 Configuring the Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.6 Reading Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.7 Cleaning-up the Session. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 3 Programming with the Low-Level API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 About the Low-level API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Low-level Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Low-level Programming Techniques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.1 Data Collection Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4 Programming the AI-207 (Immediate Mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4.1 Setting up Channel Configuration & Timestamps . . . . . . . . . . . . . . . . . . . . . 17
3.4.2 Configuring the Channel List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4.3 Adding CJC Channel to the Channel Configuration. . . . . . . . . . . . . . . . . . . . 18
3.4.4 Setting up the AutoZero Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

DNx-AI-207 Analog Input Board ii
Table of Contents
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
3.4.5 Setting the Scan Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.4.6 Reading Data & Timestamps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.5 Programming Scan Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.6 Configuring Channels & Scan Rate in ACB Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Appendix A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

DNx-AI-207 Analog Input Board iii
List of Figures
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
Table of Figures
Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1 Block Diagram of DNx-AI-207 I/O Board.......................................................................5
1-2 Photo of DNA-AI-207 Analog Input Board.....................................................................8
1-3 Pinout of the DNx-AI-207 Analog Input Board...............................................................9
1-4 Recommended Ground Connections for Analog Inputs..............................................10

DNx-AI-207 Analog Input Board
Chapter 1 1
Introduction
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
Chapter 1 Introduction
This document outlines the feature set and use of the DNx-AI-207, 16-channel
analog input boards.
The following sections are provided in this chapter:
•Organization of this Manual (Section 1.1)
•The AI-207 Board Overview (Section 1.2)
•Features (Section 1.3)
•Specification (Section 1.4)
•Device Architecture (Section 1.5)
•Indicators (Section 1.6)
•Connectors and Wiring (pinout) (Section 1.7)
•Data Representation (Section 1.8)
1.1 Organization
of this Manual This AI-207 User Manual is organized as follows:
• Introduction
Chapter 1 provides an overview of DNx-AI-207 features, device
architecture, connectivity, and logic.
• Programming with the High-Level API
Chapter 2 provides an overview of the how to create a session,
configure the session, and interpret results with the Framework API.
• Programming with the Low-Level API
Chapter 3 is an overview of low-levelAPI commands for configuring and
using the AI-207 series board.
• Appendix A - Accessories
This appendix provides a list of accessories available for use with the
DNx-AI-207 board.
• Index
This is an alphabetical listing of the topics covered in this manual.
NOTE: A glossary of terms used with the PowerDNA Cube/RACK and I/O
boards can be viewed or downloaded from www.ueidaq.com.

DNx-AI-207 Analog Input Board
Chapter 1 2
Introduction
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
Manual Conventions
To help you get the most out of this manual and our products, please note that
we use the following conventions:
Tips are designed to highlight quick ways to get the job done, or reveal
good ideas you might not discover on your own.
NOTE: Notes alert you to important information.
CAUTION! Caution advises you of precautions to take to avoid injury, data loss,
and damage to your boards or a system crash.
Text formatted in bold typeface generally represents text that should be entered
verbatim. For instance, it can represent a command, as in the following
example: “You can instruct users how to run setup using a command such as
setup.exe.”
Bold typeface will also represent field or button names, as in “Click Scan
Network.”
Text formatted in fixed typeface generally represents source code or other text
that should be entered verbatim into the source code, initialization, or other file.
Examples of Manual Conventions

Before plugging any I/O connector into the Cube or RACKtangle, be
sure to remove power from all field wiring. Failure to do so may
cause severe damage to the equipment.
Usage of Terms
Throughout this manual, the term “Cube” refers to either a PowerDNA Cube
product or to a PowerDNR RACKtanglerack mounted system, whichever is
applicable. The term DNR is a specific reference to the RACKtangle, DNAto the
PowerDNA I/O Cube, and DNx to refer to both.

DNx-AI-207 Analog Input Board
Chapter 1 3
Introduction
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
1.2 The AI-207
Board
Overview
The DNx-AI-207 is a 16-channel sequential sampling A/D board that features
18-bit resolution and 12 software-selectable input gain ranges.
DNA-AI-207, DNR-AI-207, and DNF-AI-207 boards are compatible with the UEI
Cube, RACKtangle, and FLATRACK chassis respectively. These board versions
are electronically identical and differ only in mounting hardware. The DNA
version is designed to stack in a Cube chassis. The DNR/F versions are
designed to plug into the backplane of a RACK chassis.
The DNx-AI-207 is pin compatible with UEI’s DNx-AI-217 board, which offers
more resolution, higher sample rates and simultaneously sampling inputs.
1.2.1 ADC Input
Configuration Each AI-207 channel is sequentially sampled with a maximum board throughput
of 16 kS/s (16 kHz). This configuration allows an application with a single
channel enabled to sample that channel at up to 16 kS/s. For applications
monitoring multiple channels, each additional channel must share the 16 kHz
maximum bandwidth (e.g. maximum of 1 kS/s for 16 channels enabled, 2 kS/s
for 8 channels enabled, etc.).
Additionally, the DNx-AI-207 provides a dedicated CJC channel that can be
used for reading from the built-in CJC sensor on UEI’s DNA-STP-AI-U or
AI-207TC terminal panels. When used with DNA-STP-AI-U or 207TC panel, the
DNx-AI-207 also features a direct connection to thermocouples (with open TC
detection). The software included will perform all required TC linearization and
CJC compensation and return data in °C or °F if desired.
Another key feature of the DNx-AI-207 is the oversampling engine, allowing the
board to automatically acquire as many samples as possible for the given gain/
speed and average them, which dramatically improves the noise floor.
1.2.2 Compatibility If input cross talk and channel settling time issues are a problem, even when
connected to high impedance signal sources, consider a pin-compatible
simultaneously sampling analog input board, such as the AI-217.
1.2.3 Environmental
Conditions As with all UEI PowerDNA boards, the DNx-AI-207 can be operated in harsh
environments and has been tested at 5gvibration, 50gshock, -40 to +85°C
temperature. Each board provides 350 Vrms isolation between the board and its
enclosure, or any other installed boards.
1.2.4 Software
Support Software included with the DNx-AI-207 provides a comprehensive yet easy to
use API that supports all popular operating systems including Windows, Linux,
real-time operating systems such as QNX, RTX, VxWorks and more. The
UEIDAQ framework comes with bindings for various programming languages
such as C, C++, C#, VB.NET and scientific software packages such as
LabVIEW and Matlab, as well as supporting OPC servers.

DNx-AI-207 Analog Input Board
Chapter 1 4
Introduction
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
1.3 Features The AI-207 analog input board offers the following features:
•16 fully differential channels; additional dedicated CJC channel
•Maximum sampling rate of 1 kHz per channel when all channels are
enabled
•18-bit resolution
•±10 V input range
•Programmable gains: 1, 2, 4, 8, 10, 20, 40, 80, 100, 200, 400, 800
•Overvoltage protection (-40V to +55V)
•Dynamic autozero support
•Embedded averaging engine
1.4 Specification The technical specifications for the DNx-AI-207 are listed in Table 1-1 below.
Table 1-1 DNx-AI-207 Technical Specifications
Number of channels: 16 fully dierential plus
1 single-ended dedicated CJC channel
Programmable DIO line 1 (external trigger)
ADC resolution 18 bits
Sampling rate 1 S/s - 16 kS/s per channel;
16 kS/s max aggregate for entire board
FIFO size 512 samples
Input bias current ±5nA max, ±0.5nA typical
Input impedance 10MΩ
Gains 1,2,4,8,10,20,40,80,100,200,400,800
Frontend bandwidth 48kHz @ -3dB
Common mode rejection 100dB typical
Oversampling ratio 2 to 8192, selected automatically
Accuracy ±287.59 μV at ±10 V input range.
1MFBTFTFFUIF%/Y"*%BUBTIFFUGPSEFUBJMFE
UBCMFTBOEHSBQIT
Isolation 350 Vrms
Overvoltage protection -40V to +55V
Power consumption 1.4W (stand-by); 2.2W max
Operating temp. (tested) -40°C to +85°C
Operating humidity 95%, non-condencing
Vibration IEC 60068-2-6
IEC 60068-2-64
5 g, 10-500 Hz, sinusoidal
5 g (rms), 10-500Hz, broadband random
Shock IEC 60068-2-27 50 g, 3 ms half sine, 18 shocks @ 6 orientations
30 g, 11 ms half sine, 18 shocks @ 6 orientations
MTBF 637,000 hours

DNx-AI-207 Analog Input Board
Chapter 1 5
Introduction
December 2017 www.ueidaq.com
508.921.4600
© Copyright 2017
United Electronic Industries, Inc.
1.5 Device
Architecture As shown in Figure 1-1, the DNX-AI-207 board has multiplexed inputs with a
single 18-bit converter.
Figure 1-1 Block Diagram of DNx-AI-207 I/O Board
The DNx-AI-207 analog input board features 16 differential input channels
designed for mid- to low-speed high-resolution signal measurement.
The DNx-AI-207 provides a dedicated CJC channel that can be used for reading
from a built-in CJC sensor on the DNA-STP-AI-U accessory terminal panel.
Static CJC compensation may be used when no CJC sensor is available (such
as when the I/O board is connected to a DNA-STP-37 accessory panel).
The DNx-AI-207 has an input multiplexer that sequentially selects each of the
available input signals for input to a cascaded fully differential programmable
gain amplifier (PGA) and then to an 18-bit successive approximation (SAR) 
A/D converter. Logic on the isolated side controls channel switching, settling
time delays, and the conversion process. Also, it reads data from the converter
at the maximum possible rate and sends it over the isolation barrier to the non-
isolated logic for the further processing. The following additional channels,
which are used to improve quality of the acquired signal, are internally
connected to the multiplexers: internal ground, internal 2.5000V reference, and
CJC channel.
Users configure channels (e.g., enable/disable, gains, etc.) via a channel list,
which gets processed by the PowerDNAfirmware. Every channel is allocated a
required delay for best possible settling of the analog signal. Longer settling
times are required for greater gains. The rest of the time between channel
sampling is used for oversampling a single channel. The number of averages
used in this computation varies from 2 to 8096, depending on the selected
acquisition rate and, because of the complexity of channel list processing, is set
automatically by the firmware.
Analog Input Connector
32-bit 66-MHz bus
Optical Isolation
External Trigger
+13V 50mA max
AIn0+
CJC+
AIn0-
AIn15+
...
AIn15-
MULTIPLEXER
Buffers
PGA
Calibration
Reference
Internal Ground
Internal Reference
+
-
Control
Logic
Control
Logic
Sync. Lines
18-bit
A/D
DC/DC