ADLINK USB-2401 User Manual
USB-2401
24-bit 2kS/s USB 2.0-Based Universal Input
DAQ Module
User’s Manual
Manual Rev.: 2.00
Revision Date: Apr 27, 2012
Part No: 50-1Z101-1000
Advance Technologies; Automate the World.
Revision History
Revision Release Date Description of Change(s)
2.00 Apr 27, 2012 Initial release
ii
USB-2401
Preface
Copyright 2012 ADLINK Technology, Inc.
This document contains proprietary information protected by copyright. All rights are reserved. No part of this manual may be reproduced by any mechanical, electronic, or other means in any form
without prior written permission of the manufacturer.
Disclaimer
The information in this document is subject to change without prior
notice in order to improve reliability, design, and function and does
not represent a commitment on the part of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, special, incidental, or consequential damages arising out of the use or
inability to use the product or documentation, even if advised of
the possibility of such damages.
Environmental Responsibility
ADLINK is committed to fulfill its social responsibility to global
environmental preservation through compliance with the European Union's Restriction of Hazardous Substances (RoHS) directive and Waste Electrical and Electronic Equipment (WEEE)
directive. Environmental protection is a top priority for ADLINK.
We have enforced measures to ensure that our products, manufacturing processes, components, and raw materials have as little
impact on the environment as possible. When products are at their
end of life, our customers are encouraged to dispose of them in
accordance with the product disposal and/or recovery programs
prescribed by their nation or company.
Trademarks
Product names mentioned herein are used for identification purposes only and may be trademarks and/or registered trademarks
of their respective companies.
Preface iii
Conventions
Take note of the following conventions used throughout this
manual to make sure that users perform certain tasks and
instructions properly.
Additional information, aids, and tips that help users perform
tasks.
NOTE:
NOTE:
Information to prevent minor physical injury, component dam-
age, data loss, and/or program corruption when trying to com-
CAUTION:
WARNING:
plete a task.
Information to prevent serious physical injury, component
damage, data loss, and/or program corruption when trying to
complete a specific task.
iv Preface
USB-2401
Table of Contents
Revision History...................................................................... ii
Preface.................................................................................... iii
List of Figures....................................................................... vii
List of Tables.......................................................................... ix
1 Introduction ........................................................................ 1
1.1 Overview.............................................................................. 1
1.2 Features............................................................................... 1
1.3 Applications ......................................................................... 2
1.4 Specifications....................................................................... 2
1.4.1 General Specifications................................................ 2
1.4.2 General Analog Input.................................................. 2
1.4.3 Analog Input Electrical................................................ 4
1.4.4 Digital Input/Output..................................................... 7
1.5 Software Support ................................................................. 8
1.6 Driver Support for Windows................................................. 8
1.7 Utilities for Windows .......................................................... 10
1.8 Overview and Dimensions ................................................. 11
1.8.1 Module...................................................................... 11
1.8.2 Module Stand ........................................................... 14
1.9 Connector Information ....................................................... 18
2 Getting Started ................................................................. 21
2.1 Connecting the USB-2401 Module .................................... 21
2.2 Device ID ........................................................................... 22
2.3 Hardware Configuration..................................................... 23
2.4 Device Mounting ................................................................ 23
2.4.1 Rail Mounting............................................................ 23
Table of Contents v
2.4.2 Wall Mounting ........................................................... 25
3 Operation........................................................................... 27
3.1 Functional Layout............................................................... 27
3.2 Signal Sources................................................................... 27
3.2.1 Floating Signal Source.............................................. 27
3.2.2 Ground-Referenced Signal Source........................... 28
3.3 Signal Connection.............................................................. 28
3.3.1 Voltage Input Mode .................................................. 28
3.3.2 Current Input Mode................................................... 29
3.3.3 Full Bridge and Half Bridge Input Mode.................... 30
3.3.4 Thermocouple Input Mode........................................ 31
3.3.5 RTD Input Mode ....................................................... 32
3.3.6 Wire Resistance Mode.............................................. 34
3.4 AI Data Format................................................................... 35
3.5 ADC Sampling Rate........................................................... 36
3.5.1 Software Polling Data Transfer
(Non-Buffering Programmed I/O).............................. 36
3.5.2 Continuous Acquisition Mode ................................... 37
3.6 Programmable Function I/O............................................... 37
3.6.1 TTL DI/DO ................................................................ 37
3.6.2 General Purpose Timer/Counter............................... 38
3.6.3 General Purpose Timer/Counter Modes................... 39
4 Calibration......................................................................... 45
Important Safety Instructions............................................... 47
Getting Service...................................................................... 49
vi Table of Contents
USB-2401
List of Figures
Figure 1-1: U-Test Interface ........................................................ 10
Figure 1-2: USB-2401 Module Rear View................................... 11
Figure 1-3: USB-2401 Module Side View ................................... 12
Figure 1-4: USB-2401 Module Front View .................................. 13
Figure 1-5: Module, Stand, Connector, and USB Cable ............. 14
Figure 1-6: Module, Stand, & Wall Mount Kit Side View (w/ Connec-
tions)......................................................................... 14
Figure 1-7: Module In Stand Front View ..................................... 15
Figure 1-8: Module Stand Top View ........................................... 16
Figure 1-9: Module Stand Side Cutaway View ........................... 17
Figure 1-10: Module Stand Front View ......................................... 17
Figure 2-1: USB-2401 Module in Windows Device Manager...... 21
Figure 2-2: Device ID Selection Control...................................... 22
Figure 2-3: Rail Mount Kit ........................................................... 23
Figure 2-4: Module Pre-Rail Mounting ........................................ 24
Figure 2-5: Module Rail-Mounted ............................................... 24
Figure 2-6: Wall Mount Holes ..................................................... 25
Figure 2-7: Module with Wall Mount Apparatus .......................... 25
Figure 3-1: USB-2401 Functional Block Diagram ....................... 27
Figure 3-2: Ground-Referenced Source and Differential Input ... 28
Figure 3-3: Floating Source and Differential Input ...................... 29
Figure 3-4: Current Source Connection ...................................... 30
Figure 3-5: Full Bridge and Half Bridge Connection ................... 31
Figure 3-6: Thermocouple Connection ....................................... 32
Figure 3-7: 4-Wire RTD Connection ........................................... 33
Figure 3-8: 3-Wire RTD Connection ........................................... 33
Figure 3-9: 2-wire RTD Connection ............................................ 34
Figure 3-10: 2-Wire Resistance Connection ................................. 35
Figure 3-11: Mode 1-Simple Gated-Event Calculation ................. 39
Figure 3-12: Mode 2-Single Period Measurement ........................ 40
Figure 3-13: Mode 3-Single Pulse-Width Measurement ............... 40
Figure 3-14: Mode 4-Single-Gated Pulse ..................................... 41
Figure 3-15: Mode 5-Single-Triggered Pulse................................ 42
Figure 3-16: Mode 6-Re-Triggered Single Pulse .......................... 42
Figure 3-17: Mode 7-Single-Triggered Continuous Pulse............. 43
Figure 3-18: Mode 8-Continuous Gated Pulse ............................. 43
Figure 3-19: Mode 9-Edge Separation Measurement................... 44
Figure 3-20: Mode 10-PWM Output.............................................. 44
List of Figures vii
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viii List of Figures
USB-2401
List of Tables
Table 1-1: U-Test Interface Legend................................................ 10
Table 1-2: USB-2401 Pin Assignment ............................................ 18
Table 1-3: I/O Signal Description .................................................... 19
Table 3-1: Analog Input Range and Output Digital Code................ 35
Table 3-2: Analog Input Range and Output Digital Code (cont’d)... 36
Table 3-3: TTL Digital I/O Pin Definition ......................................... 37
Table 3-4: Timer/Counter Pin Definition.......................................... 38
List of Tables ix
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xList of Tables
1 Introduction
1.1 Overview
The USB-2401 is a 24-bit, 4-channel simultaneous-sampling universal input USB DAQ module featuring built-in signal conditioning
and direct measurement of commonly used sensors, including
current output transducers, thermocouple, RTD, load cell, strain
gauge, and resistance. Individual channels can be programmed to
measure different signal types.
The USB-powered USB-2401 is equipped with removable
screw-down terminals for easy device connectivity, and the
included multi-functional stand fully supports desktop, rail, or wall
mounting.
The USB-2401 is suitable for basic measurement applications
requiring high resolution and accuracy, laboratory research and
material testing environments, and industrial temperature measurement. U-Test, a free ready-to-use testing program is included
to enable operation or testing of all ADLINK USB DAQ series functions with no programming requirements.
USB-2401
1.2 Features
X High-speed USB 2.0
X USB powered
X 4-CH simultaneous-sampling analog input
X Built-in signal conditioning for high voltage/current/thermo-
couple/RTD/strain gauge/load cell/resistance measurement
X Sample rate from 20 S/s to 2 kS/s
X Functional digital I/O
X Removable screw-down terminal
X Lockable USB cable for secure connectivity
X Ready-to-use testing application (U-Test) provided
Introduction 1
1.3 Applications
X Automotive testing
X Laboratory research
X Biotech measurement
X I/O control
1.4 Specifications
1.4.1 General Specifications
Physical, Power, and Operating Environment
Interface
Dimensions
I/O Connector Two 20-pin removable screw-down terminals
Power requirement USB power (5 V @ 400 mA)
Operating
environment
Storage environment
High speed USB 2.0 compatible, mini-USB
connector
156 (L) x 114 (W) x 41 (H) mm (6.14 X 4.49 X
1.61 in.)
Ambient temperature: 0 to 55°C
Relative humidity: 10% to 90%,
non-condensing
Ambient temperature: -20 to 70 °C
Relative humidity: 5% to 95%, non-condensing
1.4.2 General Analog Input
General
Number of channels: 4 differential input (simultaneous-sampling)
Sampling rate (sample/sec) 20, 40, 80, 160, 320, 500, 1000, 2000
Resolution 24-bit
Input coupling DC
Input mode and range
Input range or
supporting type
2Introduction
Actual input range
USB-2401
Voltage ±25V
±12.5V
±2.5V
±312.5mV
Current ±20mA 2.5V
Thermocouple K, J, N, R, S, B, T, E 78.125mV
RTD (3-wire, 4-wire) Pt 100, Pt 1000 2.5V
Half-Bridge (120Ω, 350Ω) Max. 30mV/V 78.125mV
Full-Bridge (120Ω, 350Ω) Max. 30mV/V 78.125mV
2-Wire Resistance 30kΩ 2.5V
Excitation voltage 2.5V (for half/full-bridge mode only)
Excitation current 0.5mA for RTD mode
0.05mA for Resistance mode
Cold junction compensation
(CJC) accuracy
Operational common mode
voltage range
Overvoltage protection Power on:
FIFO buffer size 4k samples
Data transfers Programmed I/O, continuous (bulk transfer
Input impedance 1.009M for voltage input mode
± 0.5°C (after 15 minute warmup)
Voltage input mode: Vcm+Vpp/2 ≦ input
range (25V/12.5V/2.5V/ 0.3125V)
Current input mode: Vcm ≦24V
Voltage input mode: 30V
Current input mode: 60mA
Sensor input mode enable: no protection
Sensor input mode disable: 30V
Excitation voltage (EX+) and AGND: no
protection
mode)
249.5 for current input mode
±25V
±12.5V
±2.5V
±312.5mV
Introduction 3
1.4.3 Analog Input Electrical
Temperature Draft @20SPS, in ppm/°C
Mode Gain drift Offset drift
Voltage (±25V) 1.389055871 0.043023355
Voltage (±12.5V) 1.37552178 0.075556565
Voltage (±2.5V) 1.662727273 0.030882956
Voltage (±312.5mV) 21.92878977 0.110084412
Current (±20mA) 3.270369091 0.282946284
Full-bridge 28.00370355 30.90013157
Half-bridge 33.48025514 1.750342188
Thermocouple 62.9978196 0.164409864
2-wire RTD 2.842575758 0.522492944
3-wire RTD 2.879839489 0.258840329
4-wire RTD 2.902723485 0.018656382
2-wire resistance 3.026166667 0.03246755
Temperature Draft @160SPS, in ppm/°C
Mode Gain drift Offset drift
Voltage (±25V) 1.533312973 0.084457938
Voltage (±12.5V) 1.520465436 0.134715279
Voltage (±2.5V) 1.732148674 0.054557101
Voltage (±312.5mV) 20.94809375 0.130828487
Current (±20mA) 3.488472439 0.305882921
Full-bridge 26.72626394 17.74701205
Half-bridge 35.27328612 1.748929398
4Introduction
Mode Gain drift Offset drift
Thermocouple 105.3142618 0.193622785
2-wire RTD 2.965409564 0.512440163
3-wire RTD 2.996320076 0.240909456
4-wire RTD 2.854513258 0.086721521
2-wire resistance 3.40709375 0.06209485
Temperature Draft @2000SPS, in ppm/°C
Mode Gain drift Offset drift
Voltage (±25V) 1.620950284 0.105635778
Voltage (±12.5V) 1.584251894 0.11027477
Voltage (±2.5V) 1.701225379 0.067356314
Voltage (±312.5mV) 20.52684091 0.113061874
USB-2401
Current (±20mA) 3.771356399 0.338399386
Full-bridge 30.71138027 50.00179464
Half-bridge 35.58911174 1.862124485
Thermocouple 117.7077884 0.435895845
2-wire RTD 3.047327178 0.452466872
3-wire RTD 3.124556345 0.189605804
4-wire RTD 3.216423295 0.088365093
2-wire resistance 3.386921402 0.04574323
Introduction 5
System Noise, in LSB (Typical, 25°C): 20 SPS to 160 SPS
Mode Sampling Rate (SPS)
20 40 80 160
Voltage (±25V) 9.443641 13.58713513 22.225423 47.06011713
Voltage (±12.5V) 10.45022375 15.55506725 23.934448 50.668689
Voltage (±2.5V) 8.941254375 12.75718938 19.522499 46.11391238
Voltage
(±312.5mV)
Current (±20mA) 29.50086975 33.76906888 39.179197 53.86180763
Full/Half-bridge 58.669068 33.97045388 41.628525 67.98029188
Thermocouple 28.24161013 41.73502813 51.59679 76.21635225
2-wire RTD 8.00126525 11.64115513 16.869046 33.30653975
3-wire RTD 8.407154625 12.01619113 16.528028 33.69525963
4-wire RTD 9.043779125 12.47814688 16.762287 45.44077163
2-wire
resistance
11.115466 15.1842875 19.108748 39.44412825
9.318955625 13.208205 18.829651 43.74764375
System Noise, in LSB (Typical, 25°C): 320 SPS to 2000 SPS
Mode Sampling Rate (SPS)
320 640 1000 2000
Voltage (±25V) 72.508028 142.60307 71.11201 119.26144
Voltage (±12.5V) 81.44560913 139.01469 77.924207 128.36732
Voltage (±2.5V) 66.64280488 136.24263 71.915341 122.92882
Voltage
(±312.5mV)
Current (±20mA) 77.58907738 131.06695 80.416917 126.239
Full/Half-bridge 92.8294875 144.14509 175.67111 202.15501
6Introduction
48.83473638 79.888989 86.157589 128.4315
USB-2401
Mode Sampling Rate (SPS)
Thermocouple 107.9735725 143.46202 198.49927 202.17693
2-wire RTD 44.53668125 77.870435 71.369319 127.45831
3-wire RTD 42.00570563 87.738238 72.70806 123.21166
4-wire RTD 72.2785775 155.50389 72.168651 123.65813
2-wire
resistance
72.76746238 153.9091 71.566314 122.28421
1.4.4 Digital Input/Output
I/O Specifications
Number of channels 4-CH programmable function digital input (DI)
2-CH programmable function digital output
(DO)
Compatibility TTL (single-end) (supports 3.3V and 5 V DI but
3.3V DO)
Input voltage Logic low: VIL = 0.8 V max; IIL = 0.2 mA max.
Logic high: VIH = 2.0 V min.; IIH = 0.2 mA max.
Output voltage Logic low: VOL = 0.5 V max; IOL = 10 mA max.
Logic high: VOH = 2.6V min.; IIH = 10 mA max.
Supporting modes (only
one can be selected and
function at the same time,
please see Section 4.6:
Programmable Function
I/O)
X 4-CH TTL DI and 2-CH TTL
DO
X 1-CH 32-bit general-purpose
timer/counters:
Z Clock source: internal or
external
Z Max source frequency:
internal: 80 MHz; external:
10 MHz
X 1-CH PWM outputs:
Z Duty cycle:1-99% (please
see Section 4.6.3: Mode 10:
PWM Output) Modulation
frequency: 20 MHz to
0.005Hz
Introduction 7
I/O Specifications
Data transfers Programmed I/O
1.5 Software Support
ADLINK provides comprehensive software drivers and packages
to suit various user approaches to system building. In addition to
programming libraries, such as DLLs, for most Windows-based
systems, ADLINK also provides drivers for other application environments such as LabVIEW® and MATLAB®. ADLINK also provides ActiveX component ware for measurement and
SCADA/HMI, and breakthrough proprietary software. All software
options are included in the ADLINK All-in-One CD.
Be sure to install the driver & utility before using the USB-2401
module.
1.6 Driver Support for W indows
1.6.1 UD-DASK
UD-DASK is composed of advanced 32/64-bit kernel drivers for
customized DAQ application development. USB-DASK enables
you to perform detailed operations and achieve superior performance and reliability from your data acquisition system. DASK
kernel drivers now support Windows 7/Vista® OS.
1.6.2 DAQPilot
DAQPilot is a SDK with a graphics-driven interface for various
application development environments. DAQPilot represents
ADLINK's commitment to full support of its comprehensive line of
data acquisition products and is designed for the novice to the
most experienced programmer.
As a task-oriented DAQ driver, SDK and wizard for Windows systems, DAQPilot helps you shorten development time while accelerating the learning curve for data acquisition programming.
You can download and install DAQPilot at:
http://www.adlinktech.com/TM/DAQPilot.html
8Introduction
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