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 ii Revision Release Date 2.
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.
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: CAUTION: WARNING: iv Information to prevent minor physical injury, component damage, data loss, and/or program corruption when trying to complete a task.
USB-2401 Table of Contents Revision History...................................................................... ii Preface .................................................................................... iii List of Figures ....................................................................... vii List of Tables.......................................................................... ix 1 Introduction ........................................................................ 1 1.1 Overview..........
2.4.2 Wall Mounting ........................................................... 25 3 Operation ........................................................................... 27 3.1 Functional Layout............................................................... 27 3.2 Signal Sources................................................................... 27 3.3 3.4 3.5 3.2.1 Floating Signal Source.............................................. 27 3.2.2 Ground-Referenced Signal Source.......................
USB-2401 List of Figures Figure 1-1: Figure 1-2: Figure 1-3: Figure 1-4: Figure 1-5: Figure 1-6: Figure 1-7: Figure 1-8: Figure 1-9: Figure 1-10: Figure 2-1: Figure 2-2: Figure 2-3: Figure 2-4: Figure 2-5: Figure 2-6: Figure 2-7: Figure 3-1: Figure 3-2: Figure 3-3: Figure 3-4: Figure 3-5: Figure 3-6: Figure 3-7: Figure 3-8: Figure 3-9: Figure 3-10: Figure 3-11: Figure 3-12: Figure 3-13: Figure 3-14: Figure 3-15: Figure 3-16: Figure 3-17: Figure 3-18: Figure 3-19: Figure 3-20: List of Figures U-Test Inter
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USB-2401 List of Tables Table Table Table Table Table Table Table 1-1: 1-2: 1-3: 3-1: 3-2: 3-3: 3-4: List of Tables U-Test Interface Legend ................................................ 10 USB-2401 Pin Assignment ............................................ 18 I/O Signal Description .................................................... 19 Analog Input Range and Output Digital Code................ 35 Analog Input Range and Output Digital Code (cont’d)... 36 TTL Digital I/O Pin Definition ..............
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USB-2401 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.
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 High speed USB 2.0 compatible, mini-USB connector Dimensions 156 (L) x 114 (W) x 41 (H) mm (6.14 X 4.49 X 1.61 in.
USB-2401 Voltage ±25V ±12.5V ±2.5V ±312.5mV ±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 ± 0.
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) 0.282946284 3.270369091 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.
USB-2401 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 Current (±20mA) 3.
System Noise, in LSB (Typical, 25°C): 20 SPS to 160 SPS Mode Sampling Rate (SPS) 20 40 80 160 9.443641 13.58713513 22.225423 47.06011713 Voltage (±12.5V) 10.45022375 15.55506725 23.934448 50.668689 Voltage (±2.5V) 19.522499 46.11391238 15.1842875 19.108748 39.44412825 Current (±20mA) 29.50086975 33.76906888 39.179197 53.86180763 33.97045388 41.628525 67.98029188 28.24161013 41.73502813 51.59679 76.21635225 2-wire RTD 8.00126525 11.64115513 16.869046 33.30653975 3-wire RTD 8.
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.
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.
USB-2401 Please note that only DAQPilot versions 2.3.0.712 and later can support the USB-2401.
1.7 Utilities for Windows 1.7.1 U-Test U-Test is a free and ready-to-use utility which can assist instant testing and operation of all ADLINK USB DAQ series functions with no programming. In addition to providing data collection and monitoring functions, U-Test also supports basic FFT analysis and provides direct control of analog output and digital I/O with a user-friendly interface.
USB-2401 1.8 Overview and Dimensions All dimensions shown are in millimeters (mm) NOTE: 1.8.1 Module 114 41.
Figure 1-3: USB-2401 Module Side View 12 Introduction
USB-2401 114 41.
1.8.2 Module Stand The multi-function USB-2401 stand is compatible with desk, rail, or wall mounting. To fix the module in the stand, slide the module body into the stand until a click is heard. To remove the module from the stand, twist the bottom of the stand in a back-and forth motion and separate from the module. Figure 1-5: Module, Stand, Connector, and USB Cable 200.1 169.4 156.
USB-2401 Figure 1-7: Module In Stand Front View Introduction 15
B 20.4 20.
USB-2401 5.89 1.5 3.
1.9 Connector Information The USB-2401 module is equipped with 40-pin removable screw-down terminal connectors, with pin assignment and signal description as follows.
USB-2401 Signal Name Reference Direction Description GND<0..3> -------- Ground of excitation voltage/current, with GND<0..3> and DGND connected on board DGND -------- Digital ground, DGND and GND<0..3> are connected on board AI<0..4> GND I Differential analog Input channels 0~3 CI<0..4> GND I Current input channel 0~3. EXC<0..3> GND O Excitation output for channel 0~3; can be configured to voltage output (2.5V) or current output (1mA) by software, with corresponding ground pin GND<0..
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USB-2401 2 Getting Started WARNING: The appropriate driver must be installed before you can connect the USB DAQ to the computer system. Refer to Section 1.6: Driver Support for Windows for driver support information. 2.1 Connecting the USB-2401 Module 1. Turn on the computer. 2. Connect the USB-2401 module to one USB 2.0 port on the computer using the included USB cable. 3. The first time the USB-2401 module is connected, a New Hardware message appears.
If the USB-2401 module cannot be detected, the power provided by the USB port may be insufficient. The USB-2401 module is exclusively powered by the USB port and requires 400 mA @ 5 V. 2.2 Device ID A rotary control on the rear of the module (as shown) controls device ID setting and can be set from 1 to 8. The device ID allows dedicated control of the USB-2401 module irrespective of the connected USB port.
USB-2401 2.3 Hardware Configuration All remaining hardware configurations are software programmable, including sampling/update rate, input/output channel, input range, and others. Please see the UD-DASK Function Reference manual for details. 2.4 Device Mounting 2.4.1 Rail Mounting The multi-function stand can be mounted on the DIN rail using the rail-mount kit as shown.
Figure 2-4: Module Pre-Rail Mounting Figure 2-5: Module Rail-Mounted 24 Getting Started
USB-2401 2.4.2 Wall Mounting The multi-function stand can be fixed to a wall using four flush head screws as shown. The four screw holes should be approximately 3.4 mm in diameter. 20.4 13.
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USB-2401 3 Operation Operation of the USB-2401 is described here to assist in configuration and programming of the module. Functions described include A/D conversion, programmable function I/O, and others 3.1 Functional Layout The USB-2401 provides 4-channel 24-bit universal analog inputs and supports seven input modes, including voltage input, current input, thermocouple, RTD, full bridge, half bridge, and resistance measurement.
3.2.2 Ground-Referenced Signal Source Connected in some way to the existing ground system, to a common ground point with respect to the USB DAQ, when the computer is connected to the same power system. Non-isolated output of instruments and devices connected to the existing power systems are ground-referenced signal sources. 3.3 Signal Connection Each analog input channel can be configured to different input modes by the software API. Details of signal connection in different input modes follow. 3.3.
USB-2401 100 times the equivalent source impedance, such that if the source impedance is less than 100Ω, the negative side of the signal needs only be connected to GND as well as the negative input of the Instrumentation Amplifier without any resistors. Connection of a floating signal source to the USB-2401 in differential input mode is as shown. USB-2401 AI+ Amplifier AI- Amplifier Floating signal source GND Figure 3-3: Floating Source and Differential Input 3.3.
I ƻ Figure 3-4: Current Source Connection 3.3.3 Full Bridge and Half Bridge Input Mode A bridge-based transducer is a passive device, requiring voltage excitation to convert the resistive change to an electrical signal. The USB-2401 provides a steady 2.5V excitation voltage for each analog input channel in full bridge and half bridge modes. For half-bridge transducer, USB-2401 has built-in precision 20kΩ resistors to compensate the circuit as a full-bridge transducer measurement.
USB-2401 USB-2401 DC 2.5V EXC SC+ 20kƻ MUX SC20kƻ GND Figure 3-5: Full Bridge and Half Bridge Connection 3.3.4 Thermocouple Input Mode A thermocouple consists of two different conductors that produce a voltage proportional to a temperature difference between either end of the pair of conductors. The USB-2401 uses 78.125mV input range to acquire the thermocouple signal, and provides a precision built-in digital temperature sensor for cold junction compensation (CJC).
USB-2401 SC+ MUX ADC SCThermocouple Figure 3-6: Thermocouple Connection 3.3.5 RTD Input Mode The resistance temperature detector (RTD) measures temperature by correlating the resistance of the RTD element with temperature. The USB-2401 can generate a steady 0.5 mA excitation current source to each channel in RTD input mode to measure cross-voltage on the RTD. The actual input range is ±2.5V with a formula of voltage to RTD resistance conversion of: RTD(Ω) = V(volt) 0.
USB-2401 0.5mA EXC SC+ RTD MUX SC- GND Figure 3-7: 4-Wire RTD Connection 0.
0.5mA USB-2401 EXC X SC+ X RTD MUX ADC SC- X GND X Figure 3-9: 2-wire RTD Connection 3.3.6 Wire Resistance Mode The USB-2401 can source precision 0.05 mA excitation current to the resistor to be measured and use a 2.5V input range to acquire cross-voltage on the resistor. The formula of voltage to resistance conversion is: R (Ω) = V(volt) 0.00005 Since the excitation current can only drive the cross-voltage up to 1.
USB-2401 0.05mA USB-2401 MUX ADC SC + X Resistor SC X Figure 3-10: 2-Wire Resistance Connection 3.4 AI Data Format The acquired 24-bit A/D data is 2’s complement coded data format. Valid input ranges and optimum transfer characteristics are as shown. Description Bipolar Analog Input Range Full-scale range ±25 V Digital Code ±12.5 V ±2.5 V ±0.3125V N/A Least 2.98uV significant bit 1.49uV 0.298uV 0.037uV N/A FSR-1LSB 24.999997 V 12.4999985 V 2.4999997 V 0.
Description Bipolar Analog Input Range Digital Code Full-scale range ±78.125 mV N/A Least significant bit 9.313nV N/A FSR-1LSB 78.1249907 mV 7FFFFF Midscale +1LSB 9.313nV 000001 Midscale 0V 000000 Midscale -1LSB -9.313nV FFFFFF -FSR -78.125mV 800000 Table 3-2: Analog Input Range and Output Digital Code (cont’d) 3.5 ADC Sampling Rate Sampling Rate refers to ADC internal conversion speed as set by the user.
USB-2401 completed. Please refer to UD-DASK function reference for the details of corresponding software API instruction. 3.5.2 Continuous Acquisition Mode Differs from software polling mode only in the generation of block data in continuous acquisition mode without the need to consider data overwriting or acquiring repeat data in software polling mode. This mode is suitable for when continuous data is to be acquired in a fixed and precise time interval.
3.6.
USB-2401 3.6.3 General Purpose Timer/Counter Modes Ten programmable timer/counter modes are available. All initialize following a software-start signal set by the software. The GPTC software reset initializes the status of the counter and reloads the initial value to the counter. The operation remains halted until software start is executed again. Operations under different modes are as follows.
software application. Operation in which initial count = 0, count-up mode is shown. Software start Gate CLK Count value 0 0 1 2 3 4 5 5 5 Figure 3-12: Mode 2-Single Period Measurement Mode 3: Single Pulse-Width Measurement The counter calculates the pulse-width of the signal on GPTC_GATE in terms of GPTC_CLK. Initial count can be loaded from the software application. After software start, the counter calculates the number of active edges on GPTC_CLK when GPTC_GATE is in its active state.
USB-2401 Mode 4: Single-Gated Pulse Generation This mode generates a single pulse with programmable delay and programmable pulse-width following software start. The two programmable parameters can be specified in terms of periods of the GPTC_CLK input by the software application. GPTC_GATE enables/disables calculation. When GPTC_GATE is inactive, the counter halts the current count value. Generation of a single pulse with a pulse delay of two and a pulse-width of four is shown.
Software start Gate CLK 2 Count value 2 1 0 3 2 1 0 OUT Figure 3-15: Mode 5-Single-Triggered Pulse Mode 6: Re-Triggered Single Pulse Generation This mode is similar to Mode 5 except that the counter generates a pulse following every active edge of GPTC_GATE. After software start, every active GPTC_GATE edge triggers a single pulse with programmable delay and pulse width. Any GPTC_GATE triggers that occur when the prior pulse is not completed are ignored.
USB-2401 Software start Gate CLK Count value 4 4 4 3 2 1 0 2 1 0 3 2 1 0 2 1 0 3 2 OUT Figure 3-17: Mode 7-Single-Triggered Continuous Pulse Mode 8: Continuous Gated Pulse Generation This mode generates periodic pulses with programmable pulse interval and pulse-width following software start. GPTC_GATE enables/disables calculation. When GPTC_GATE is inactive, the counter halts the current count value.
the counter value in Edge Separation Measurement mode is shown. Software start Gate AUX CLK C ou nt v a lu e 13 13 12 11 10 9 8 7 6 5 4 3 2 1 1 1 1 1 1 Figure 3-19: Mode 9-Edge Separation Measurement Mode 10: PWM Output The USB-1900 Series timer/counter can also simulate a PWM (Pulse Width Modulation) output. By setting a varying amount of Pulse_initial_cnt and Pulse_length_cnt, varying pulse frequencies (Fpwm) and duty cycles (Dutypwm) can be obtained. PWM output is shown.
USB-2401 4 Calibration The USB-2401 is factory-calibrated before shipment. The associated calibration constants of the TrimDACs firmware are written to the onboard EEPROM. TrimDACs firmware is the algorithm in the FPGA. Loading calibration constants entails loading the values of TrimDACs firmware stored in the onboard EEPROM. The recommended re-calibration interval is one year. Please contact your local dealer to request calibration service.
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USB-2401 Important Safety Instructions For user safety, please read and follow all instructions, WARNINGS, CAUTIONS, and NOTES marked in this manual and on the associated equipment before handling/operating the equipment. X Read these safety instructions carefully. X Keep this user’s manual for future reference. X Read the specifications section of this manual for detailed information on the operating environment of this equipment.
X Never attempt to fix the equipment. Equipment should only be serviced by qualified personnel. A Lithium-type battery may be provided for uninterrupted, backup or emergency power. Risk of explosion if battery is replaced with an incorrect type; please dispose of used batteries appropriately.
USB-2401 Getting Service Contact us should you require any service or assistance. ADLINK Technology, Inc. Address: 9F, No.166 Jian Yi Road, Zhonghe District New Taipei City 235, Taiwan ᄅؑקխࡉ৬ԫሁ 166 ᇆ 9 ᑔ Tel: +886-2-8226-5877 Fax: +886-2-8226-5717 Email: service@adlinktech.com Ampro ADLINK Technology, Inc. Address: 5215 Hellyer Avenue, #110, San Jose, CA 95138, USA Tel: +1-408-360-0200 Toll Free: +1-800-966-5200 (USA only) Fax: +1-408-360-0222 Email: info@adlinktech.com ADLINK Technology (China) Co.
ADLINK Technology, Inc. (French Liaison Office) Address: 15 rue Emile Baudot, 91300 Massy CEDEX, France Tel: +33 (0) 1 60 12 35 66 Fax: +33 (0) 1 60 12 35 66 Email: france@adlinktech.com ADLINK Technology Japan Corporation Address: ͱ101-0045 ᵅҀ䛑गҷ⬄ऎ⼲⬄䤯 ⬎ފ3-7-4 ⼲⬄ 374 ɛɳ 4F KANDA374 Bldg. 4F, 3-7-4 Kanda Kajicho, Chiyoda-ku, Tokyo 101-0045, Japan Tel: +81-3-4455-3722 Fax: +81-3-5209-6013 Email: japan@adlinktech.com ADLINK Technology, Inc.
