DNx-AI-217 — User Manual 16-Channel, 24-bit, Simultaneously Sampling, Differential Analog Input Board with Cold-Junction Compensation for the PowerDNA Cube and PowerDNR RACKtangle Release 4.6 April 2013 PN Man-DNx-AI-217-413 © Copyright 1998-2013 United Electronic Industries, Inc. All rights reserved.
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DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Contents Table of Contents Chapter 1 Introduction .................................................... 1 1.1 Organization of Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 The AI-217 Interface Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Figures List of Figures 1-1 1-2 1-3 1-4 1-5 1-6 Block Diagram of the AI-217 Layer ............................................................................... 8 Logical Modules of the DNx-AI-217 Controller.............................................................. 9 The DNA-AI-217 Analog-Input Layer .......................................................................... 12 The DNR-AI-217 Analog-Input Layer.......................
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction Chapter 1 Introduction This document outlines the feature set and use of the DNx-AI-217 board. The AI-217 is a 16-channel analog input module for the PowerDNA I/O Cube (DNAAI-217) and the DNR-1G HalfRACK and RACKtangle chassis (DNR-AI-217). 1.1 Organization of Manual © Copyright 2013 United Electronic Industries, Inc.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 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 to reveal good ideas you might not discover on your own. NOTE: Notes alert you to important information.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.2 The AI-217 Interface Board The DNA-AI-217 and DNR-AI-217 are 16-channel simultaneously sampling A/D boards compatible with UEI’s popular Cube and RACKtangle chassis respectively. The DNA/DNR versions are electronically identical and feature 24bit resolution with 7 software selectable input ranges.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.3 Features © Copyright 2013 United Electronic Industries, Inc.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.4 Specification The technical specification for the DNx-AI-217 board are listed in Table 1-1. Table 1-1. DNx-AI-217-1 Technical Specifications Number of channels: 16 fully differential plus 1 single-ended dedicated CJC channel ADC resolution / type 24 bits / SAR.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.5 Comparison The following table is a side-by-side comparison of specification items for the AI207 and the AI-217 analog input layers: between AI-217 and AI- Table 1-3. AI-207 vs.AI-217 207 Layers Item AI-207 AI-217 No.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction Table 1-3. AI-207 vs.AI-217 (Forts.) Item Pinout Noise Filtering AI-207 AI-217 Same for both models Averaging engine that averages multiple samples to improve resolution. AI-217 has a simple analog low-pass RC filter on the front-end for anti-aliasing designed for 60k-120kS/s. Digital FIR filter for all channels with user-configurable coefficients on back-end. AI-217-1 has 128-tap FIR, AI-217-803 has 512-tap.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction Figure 1-1 is a block diagram of the architecture of the AI-217 layer.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction inputs are first sampled by the ADC simultaneously and gain/offset adjustments are applied. The CJC channel is sampled once each decimation cycle. More information on A/D conversion is provided in the next section. The dedicated CJC channel that can be used for reading from a built-in CJC sensor on the DNA-STP-AI-U or AI-207TC accessory terminal panel.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction placed into the output buffer in the same order as they are in the channel list, however each data sample incorporates a channel number that can be used to re-order the output buffer in software. Using the output channel list, the PGA Access Module manages PGA operations, stores data from each, and generates error IRQs for any error conditions that occur.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction nous operation of multiple layers; however if there are other layers in the system that require synchronization using the scan clock then there are two other options that should be considered. One is to divide the master 8x clock by eight clock cycles using the CT-601 layer and distribute it across the system.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.8 Indicators A photo of the DNx-AI-217 unit is illustrated below. The front panel has two LED indicators: • RDY: indicates that the layer is receiving power and operational. • STS: can be set by the user using the low-level framework. DNA bus connector RDY LED STS LED DB-37 (female) 37-pin I/O connector Figure 1-3.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.9 Layer Connectors and Wiring Figure 1-5 below illustrates the pinout of the AI-217. The AI-217 layer uses a Bsize 37-pin D-sub connector. The following signals are located at the connector: • AIN0+ – AIN15+ — input channel, differential mode. Use AIN0 to –AIN15 as signal returns.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 1 Introduction 1.9.1 Analog Input Ground Connections To avoid errors caused by common mode voltages on analog inputs, follow the recommended grounding guidelines in Figure 1-6 below. Because all analog input channels in AI-201/202/207/208/217/225 layers are isolated as a group, you can connect layer AGND to the ground of the signal source and eliminate the resistors shown in Figure 1-6 for floating differential input signals.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 2 Programming with the High Level API Chapter 2 Programming with the High Level API This section describes how to control the DNx-AI-217 using the UeiDaq Framework High Level API. UeiDaq Framework is object oriented and its objects can be manipulated in the same manner from different development environments such as Visual C++, Visual Basic or LabVIEW.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 2 Programming with the High Level API 2.3.2 Thermocouple For thermocouples, use the object method CreateTCChannel which automatMeasurement ically handles temperature calculations, as follows: // Configure channel 0 to 2, scaling for thermocouples; // thermocouple Type K, degrees F°, using CJC built-in // compensation from the STP-AI-U board, in differential mode. mySs.CreateTCChannel("pdna://192.168.100.2/Dev0/Ai0:2", -10.0, 10.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 2 Programming with the High Level API 2.4 Configuring the Timing You can configure the AI-217 to run in simple mode (point by point) or highthroughput buffered mode (ACB mode), or high-responsiveness (DMAP) mode. In simple mode, the delay between samples is determined by software on the host computer.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 2 Programming with the High Level API 2.6 Read Data Reading data is done using reader object(s). There is a reader object to read raw data coming straight from the A/D converter. There is also a reader object to read data already scaled to volts or mV/V. The following sample code shows how to create a scaled reader object and read samples.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Chapter 3 Programming with the Low-level API Chapter 3 Programming with the Low-level API The PowerDNA cube and PowerDNR RACKtangle and HalfRACK can be programmed using the low-level API. The low-level API offers direct access to PowerDNA DAQBios protocol and also allows you to access device registers directly.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board Appendix A Appendix A A. Accessories The following cables and STP boards are available for the AI-217 layer. DNA-CBL-37 This is a 37-conductor flat ribbon cable with 37-pin male D-sub connectors on both ends. The length is 3ft and the weight is 3.4 ounces or 98 grams. DNA-CBL-37S This is a 37-conductor round shielded cable with 37-pin male D-sub connectors on both ends.
DNA/DNR-AI-217 Simultaneous Sampling Differential Analog Input Board 21 Index B J Block Diagram Jumper Settings 8 C L Cable(s) 20 CJC Sensor 9 Configuring the Resource String Connectors and Wiring 13 Conventions 2 Creating a Session 15 Low-level API 15 H High Level API 15 5 19 O Organization 1 S Screw Terminal Panels 20 Setting Operating Parameters 4 Specifications 5 Support ii I Isolation 3 © Copyright © 2013 Copyright 2013 United Electronic United Electronic Industries,Industries, Inc.
