National Instruments Network Card NI USB 6008 User Manual

USER GUIDE AND SPECIFICATIONS  
NI USB-6008/6009  
This user guide describes how to use the National Instruments  
USB-6008/6009 data acquisition (DAQ) devices and lists specifications.  
Introduction  
The NI USB-6008/6009 provides connection to eight analog input (AI)  
channels, two analog output (AO) channels, 12 digital input/output (DIO)  
channels, and a 32-bit counter with a Full-Speed USB interface.  
Note This manual revision updates naming conventions to reflect the conventions used in  
NI-DAQmx. Table 1 notes the correlation between the old and updated names.  
Table 1. Digital Output Driver Type Naming Conventions  
Hardware Functionality  
Open-drain  
NI-DAQmx Terminology  
Open collector  
Push-pull  
Active drive  
 
 
Dimensions  
Figure 3 illustrates the dimensions of the NI USB-6008/6009 device.  
23.19 mm  
(0.913 in.)  
81.81 mm  
(3.221 in.)  
85.09 mm  
(3.350 in.)  
NATIONAL  
INSTRUMENTS  
76.09 mm  
(2.996 in.)  
63.50 mm  
(2.500 in.)  
72.65 mm  
(2.860 in.)  
Figure 3. NI USB-6008/6009 in Millimeters (Inches)  
Safety Guidelines  
Caution Operate the NI USB-6008/6009 only as described in these operating instructions.  
The following section contains important safety information that you must  
follow when installing and using the NI USB-6008/6009.  
Do not operate the NI USB-6008/6009 in a manner not specified in this  
document. Misuse of the device can result in a hazard. You can compromise  
the safety protection built into the device if the device is damaged in any  
way. If the device is damaged, contact National Instruments for repair.  
Do not substitute parts or modify the device except as described in this  
document. Use the device only with the chassis, modules, accessories, and  
cables specified in the installation instructions. You must have all covers  
and filler panels installed during operation of the device.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
 
Do not operate the device in an explosive atmosphere or where there may  
be flammable gases or fumes. If you must operate the device in such an  
environment, it must be in a suitably rated enclosure.  
If you need to clean the device, use a dry cloth. Make sure that the device  
is completely dry and free from contaminants before returning it to service.  
Operate the device only at or below Pollution Degree 2. Pollution is foreign  
matter in a solid, liquid, or gaseous state that can reduce dielectric strength  
or surface resistivity. The following is a description of pollution degrees:  
Pollution Degree 1 means no pollution or only dry, nonconductive  
pollution occurs. The pollution has no influence.  
Pollution Degree 2 means that only nonconductive pollution occurs in  
most cases. Occasionally, however, a temporary conductivity caused  
by condensation must be expected.  
Pollution Degree 3 means that conductive pollution occurs, or dry,  
nonconductive pollution occurs that becomes conductive due to  
condensation.  
You must insulate signal connections for the maximum voltage for which  
the device is rated. Do not exceed the maximum ratings for the device. Do  
not install wiring while the device is live with electrical signals. Do not  
remove or add connector blocks when power is connected to the system.  
Avoid contact between your body and the connector block signal when hot  
swapping modules. Remove power from signal lines before connecting  
them to or disconnecting them from the device.  
Operate the device at or below the Measurement Category I1. Measurement  
circuits are subjected to working voltages2 and transient stresses  
(overvoltage) from the circuit to which they are connected during  
measurement or test. Measurement categories establish standard impulse  
withstand voltage levels that commonly occur in electrical distribution  
systems. The following is a description of measurement categories:  
Measurement Category I is for measurements performed on circuits  
not directly connected to the electrical distribution system referred to  
as MAINS3 voltage. This category is for measurements of voltages  
from specially protected secondary circuits. Such voltage  
measurements include signal levels, special equipment, limited-energy  
parts of equipment, circuits powered by regulated low-voltage sources,  
and electronics.  
1
Measurement Category as defined in electrical safety standard IEC 61010-1. Measurement Category is also referred to as  
Installation Category.  
2
3
Working Voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.  
MAINS is defined as a hazardous live electrical supply system that powers equipment. Suitably rated measuring circuits may  
be connected to the MAINS for measuring purposes.  
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Measurement Category II is for measurements performed on circuits  
directly connected to the electrical distribution system. This category  
refers to local-level electrical distribution, such as that provided by a  
standard wall outlet (for example, 115 V for U.S. or 230 V for Europe).  
Examples of Measurement Category II are measurements performed  
on household appliances, portable tools, and similar E Series devices.  
Measurement Category III is for measurements performed in the  
building installation at the distribution level. This category refers to  
measurements on hard-wired equipment such as equipment in fixed  
installations, distribution boards, and circuit breakers. Other examples  
are wiring, including cables, bus-bars, junction boxes, switches,  
socket-outlets in the fixed installation, and stationary motors with  
permanent connections to fixed installations.  
Measurement Category IV is for measurements performed at the  
primary electrical supply installation (<1,000 V). Examples include  
electricity meters and measurements on primary overcurrent  
protection devices and on ripple control units.  
Related Documentation  
Each application software package and driver includes information about  
writing applications for taking measurements and controlling measurement  
devices. The following references to documents assume you have  
NI-DAQmx 8.7 or later, and where applicable, version 7.1 or later of the  
NI application software.  
NI-DAQmx for Windows  
The DAQ Getting Started Guide describes how to install your NI-DAQmx  
for Windows software, how to install your NI-DAQmx-supported DAQ  
device, and how to confirm that your device is operating properly. Select  
Start»All Programs»National Instruments»NI-DAQ»DAQ Getting  
Started Guide.  
The NI-DAQ Readme lists which devices are supported by this version of  
NI-DAQ. Select Start»All Programs»National Instruments»NI-DAQ»  
NI-DAQ Readme.  
The NI-DAQmx Help contains general information about measurement  
concepts, key NI-DAQmx concepts, and common applications that are  
applicable to all programming environments. Select Start»All Programs»  
National Instruments»NI-DAQ»NI-DAQmx Help.  
Note For information about non-Windows operating system support, refer to ni.com/  
infoand enter BaseGSGML.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
LabVIEW  
If you are a new user, use the Getting Started with LabVIEW manual  
to familiarize yourself with the LabVIEW graphical programming  
environment and the basic LabVIEW features you use to build data  
acquisition and instrument control applications. Open the Getting Started  
with LabVIEW manual by selecting Start»All Programs»National  
Instruments»LabVIEW»LabVIEW Manuals or by navigating to the  
labview\manualsdirectory and opening LV_Getting_Started.pdf.  
Use the LabVIEW Help, available by selecting Help»Search the  
LabVIEW Help in LabVIEW, to access information about LabVIEW  
programming concepts, step-by-step instructions for using LabVIEW, and  
reference information about LabVIEW VIs, functions, palettes, menus, and  
tools. Refer to the following locations on the Contents tab of the LabVIEW  
Help for information about NI-DAQmx:  
Getting Started»Getting Started with DAQ—Includes overview  
information and a tutorial to learn how to take an NI-DAQmx  
measurement in LabVIEW using the DAQ Assistant.  
VI and Function Reference»Measurement I/O VIs and  
Functions—Describes the LabVIEW NI-DAQmx VIs and properties.  
Taking Measurements—Contains the conceptual and how-to  
information you need to acquire and analyze measurement data in  
LabVIEW, including common measurements, measurement  
fundamentals, NI-DAQmx key concepts, and device considerations.  
LabWindows/CVI  
The Data Acquisition book of the LabWindows/CVI Help contains  
measurement concepts for NI-DAQmx. This book also contains  
Taking an NI-DAQmx Measurement in LabWindows/CVI, which includes  
step-by-step instructions about creating a measurement task using the DAQ  
Assistant. In LabWindows/CVI, select Help»Contents, then select  
Using LabWindows/CVI»Data Acquisition.  
The NI-DAQmx Library book of the LabWindows/CVI Help contains  
API overviews and function reference for NI-DAQmx. Select Library  
Reference»NI-DAQmx Library in the LabWindows/CVI Help.  
Measurement Studio  
If you program your NI-DAQmx-supported device in Measurement Studio  
using Visual C++, Visual C#, or Visual Basic .NET, you can interactively  
create channels and tasks by launching the DAQ Assistant from MAX or  
from within Visual Studio .NET. You can generate the configuration code  
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based on your task or channel in Measurement Studio. Refer to the DAQ  
Assistant Help for additional information about generating code. You also  
can create channels and tasks, and write your own applications in your  
ADE using the NI-DAQmx API.  
For help with NI-DAQmx methods and properties, refer to the NI-DAQmx  
.NET Class Library or the NI-DAQmx Visual C++ Class Library included  
in the NI Measurement Studio Help. For general help with programming in  
Measurement Studio, refer to the NI Measurement Studio Help, which is  
fully integrated with the Microsoft Visual Studio .NET help. To view  
this help file in Visual Studio. NET, select Measurement Studio»  
NI Measurement Studio Help.  
To create an application in Visual C++, Visual C#, or Visual Basic .NET,  
follow these general steps:  
1. In Visual Studio .NET, select File»New»Project to launch the New  
Project dialog box.  
2. Find the Measurement Studio folder for the language you want to  
create a program in.  
3. Choose a project type. You add DAQ tasks as a part of this step.  
ANSI C without NI Application Software  
The NI-DAQmx Help contains API overviews and general information  
about measurement concepts. Select Start»All Programs»National  
Instruments»NI-DAQ»NI-DAQmx Help.  
The NI-DAQmx C Reference Help describes the NI-DAQmx Library  
functions, which you can use with National Instruments data acquisition  
devices to develop instrumentation, acquisition, and control applications.  
Select Start»All Programs»National Instruments»NI-DAQ»  
NI-DAQmx C Reference Help.  
.NET Languages without NI Application Software  
With the Microsoft .NET Framework version 1.1 or later, you can use  
NI-DAQmx to create applications using Visual C# and Visual Basic  
.NET without Measurement Studio. You need Microsoft Visual Studio  
.NET 2003 or Microsoft Visual Studio 2005 for the API documentation to  
be installed.  
The installed documentation contains the NI-DAQmx API overview,  
measurement tasks and concepts, and function reference. This help is fully  
integrated into the Visual Studio .NET documentation. To view the  
NI-DAQmx .NET documentation, go to Start»Programs»National  
Instruments»NI-DAQ»NI-DAQmx .NET Reference Help. Expand  
NI Measurement Studio Help»NI Measurement Studio .NET Class  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
Library»Reference to view the function reference. Expand NI  
Measurement Studio Help»NI Measurement Studio .NET Class  
Library»Using the Measurement Studio .NET Class Libraries to  
view conceptual topics for using NI-DAQmx with Visual C# and  
Visual Basic .NET.  
To get to the same help topics from within Visual Studio, go to  
Help»Contents. Select Measurement Studio from the Filtered By  
drop-down list and follow the previous instructions.  
Device Documentation and Specifications  
NI-DAQmx includes the Device Document Browser, which contains online  
documentation for supported DAQ and SCXI devices, such as documents  
describing device pinouts, features, and operation. You can find, view,  
and/or print the documents for each device using the Device Document  
Browser at any time by inserting the CD. After installing the Device  
Documentation Browser, device documents are accessible from Start»  
All Programs»National Instruments»NI-DAQ»Browse Device  
Documentation.  
Note You can also download these documents at ni.com/manuals.  
NI-DAQmx Base (Linux/Mac OS X/LabVIEW PDA 8.x)  
The NI-DAQmx Base Getting Started Guide describes how to install your  
NI-DAQmx Base software, your NI-DAQmx Base-supported DAQ device,  
and how to confirm that your device is operating properly. In Windows,  
select Start»All Programs»National Instruments»NI-DAQmx Base»  
Documentation»Getting Started Guide.  
Getting Started with NI-DAQmx Base for Linux and Mac Users describes  
how to install your NI-DAQmx Base software, your NI-DAQmx  
Base-supported DAQ device, and how to confirm that your device is  
operating properly on your Mac/Linux machine.  
The NI-DAQmx Base Readme lists which devices are supported by this  
version of NI-DAQmx Base. In Windows, select Start»All Programs»  
National Instruments»NI-DAQmx Base»DAQmx Base Readme.  
The NI-DAQmx Base VI Reference Help contains VI reference and general  
information about measurement concepts. In LabVIEW, select  
Help»NI-DAQmx Base VI Reference Help.  
The NI-DAQmx Base C Reference Help contains C reference and general  
information about measurement concepts. In Windows, select Start»All  
Programs»National Instruments»NI-DAQmx Base»Documentation»  
C Function Reference Help.  
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Note All NI-DAQmx Base documentation for Linux is installed at  
/usr/local/natinst/nidaqmxbase/documentation.  
Note All NI-DAQmx Base documentation for Mac OS X is installed at  
/Applications/National Instruments/NI-DAQmx Base/documentation.  
Training Courses  
If you need more help getting started developing an application with  
NI products, NI offers training courses. To enroll in a course or obtain a  
detailed course outline, refer to ni.com/training.  
Technical Support on the Web  
For additional support, refer to ni.com/supportor zone.ni.com.  
Installing the Software  
Software support for the NI USB-6008/6009 for Windows Vista/XP/2000  
is provided by NI-DAQmx. The DAQ Getting Started Guide, which you  
can download at ni.com/manuals, offers NI-DAQmx users step-by-step  
instructions for installing software and hardware, configuring channels and  
tasks, and getting started developing an application.  
Note For information about non-Windows operating system support, refer to ni.com/  
infoand enter BaseGSGML.  
Installing Other Software  
If you are using other software, refer to the installation instructions that  
accompany your software.  
Example Programs  
The NI-DAQmx CD contains example programs that you can use to get  
started programming with the NI USB-6008/6009. Refer to the NI-DAQmx  
for USB Devices Getting Started Guide that shipped with your device, and  
is also accessible from Start»All Programs»National Instruments»  
NI-DAQ, for more information.  
The NI-DAQmx Base software ships with example programs you can use  
to get started programming with the NI USB-6008/6009. Refer to the  
NI-DAQmx Base Getting Started Guide that shipped with your device, and  
is also accessible from Start»All Programs»National Instruments»  
NI-DAQmx Base»Documentation, for more information.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
 
Note For information about non-Windows operating system support, refer to ni.com/  
infoand enter BaseGSGML.  
Before installing the device, you must install the software you plan to use  
with the device. Refer to the Installing the Software section of this guide  
and the documentation included with the software for more information.  
Figure 4 shows key functional components of the NI USB-6008/6009.  
External  
Power  
Vbus  
+5 V/200 mA  
PFI 0  
Supply  
USB  
USB Microcontroller  
P1.<0..3>  
P0.<0..7>  
+2.5 V/CAL  
8 Channel  
12/14b ADC  
AI <0..7>  
12b DAC  
AO 0  
AO 1  
12b DAC  
Figure 4. Device Block Diagram  
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Setting Up the NI USB-6008/6009 Device  
Complete the following steps to set up the NI USB-6008/6009:  
1. Install combicon screw terminal blocks by inserting them into the  
combicon jacks.  
2. Figure 5 illustrates the signal labels that ship in the NI USB-6008/6009  
kit. You can apply the signal labels to the screw terminal blocks for  
easy signal identification.  
3
4
ANALOG  
DIGITAL  
1
2
1
2
Terminal Number Labels (Use Both Together)  
Digital I/O Label  
3
4
Single-Ended Signal Name Label (Use Either)  
Differential Signal Name Label (Use Either)  
Figure 5. NI USB-6008/6009 Signal Labels  
3. Refer to Table 4 and Figures 5 and 6 for signal label orientation and  
affix the provided signal labels to the screw terminal blocks. Until the  
signal labels are applied, you can insert the screw terminal blocks into  
either of the combicon jacks.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
 
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Overlay Label with Pin Orientation Guides  
Combicon Jack  
3
4
Signal Labels  
USB Cable  
Figure 6. Signal Label Application Diagram  
Note Once you label the screw terminal blocks, you must only insert them into the  
matching combicon jack, as indicated by the overlay label on the NI USB-6008/6009  
device.  
4. Connect the wiring to the appropriate screw terminals.  
NI USB-6008/6009 User Guide and Specifications  
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Connecting the NI USB-6008/6009 to a Computer  
Plug one end of the USB cable into the NI USB-6008/6009 and the other  
end into an available USB port on the computer.  
LED Indicator  
The NI USB-6008/6009 device has a green LED next to the USB  
connector. The LED indicator indicates device status, as listed in Table 3.  
When the device is connected to a USB port, the LED blinks steadily to  
indicate that the device is initialized and is receiving power from the  
connection.  
If the LED is not blinking, it may mean that the device is not initialized or  
the computer is in standby mode. In order for the device to be recognized,  
the device must be connected to a computer that has NI-DAQmx installed  
on it. If your device is not blinking, make sure your computer has the latest  
version of NI-DAQmx installed on it, and the computer is not in standby  
mode.  
Table 3. LED State/Device Status  
LED State  
Not lit  
Device Status  
Device not connected or in suspend.  
Device connected.  
On, not blinking  
Single-blink  
Operating normally.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
 
I/O Connector  
The NI USB-6008/6009 ships with one detachable screw terminal block for  
analog signals and one detachable screw terminal block for digital signals.  
These terminal blocks provide 16 connections that use 16 AWG to  
28 AWG wire.  
Table 4 lists the analog terminal assignments, and Table 5 lists the digital  
terminal assignments.  
Table 4. Analog Terminal Assignments  
Signal,  
Signal,  
Module  
Terminal  
Single-Ended Mode  
Differential Mode  
1
2
GND  
AI 0  
AI 4  
GND  
AI 1  
AI 5  
GND  
AI 2  
AI 6  
GND  
AI 3  
AI 7  
GND  
AO 0  
AO 1  
GND  
GND  
AI 0+  
AI 0–  
GND  
AI 1+  
AI 1–  
GND  
AI 2+  
AI 2–  
GND  
AI 3+  
AI 3–  
GND  
AO 0  
AO 1  
GND  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
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Table 5. Digital Terminal Assignments  
Module  
Terminal  
17  
Signal  
P0.0  
P0.1  
P0.2  
P0.3  
P0.4  
P0.5  
P0 6  
P0.7  
P1.0  
P1.1  
P1.2  
P1.3  
PFI 0  
+2.5 V  
+5 V  
GND  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
 
Signal Descriptions  
Table 6 describes the signals available on the I/O connectors.  
Table 6. Signal Descriptions  
Signal Name  
Reference  
Direction  
Description  
GND  
Ground—The reference point for the  
single-ended AI measurements, bias  
current return point for differential mode  
measurements, AO voltages, digital  
signals at the I/O connector, +5 VDC  
supply, and the +2.5 VDC reference.  
AI <0..7>  
Varies  
Input  
Analog Input Channels 0 to 7—For  
single-ended measurements, each signal is  
an analog input voltage channel. For  
differential measurements, AI 0 and AI 4  
are the positive and negative inputs of  
differential analog input channel 0.  
The following signal pairs also form  
differential input channels:  
<AI 1, AI 5>, <AI 2, AI 6>, and  
<AI 3, AI 7>.  
AO 0  
AO 1  
GND  
GND  
GND  
Output  
Output  
Analog Channel 0 Output—Supplies the  
voltage output of AO channel 0.  
Analog Channel 1 Output—Supplies the  
voltage output of AO channel 1.  
P1.<0..3>  
P0.<0..7>  
Input or  
Output  
Digital I/O SignalsYou can  
individually configure each signal as an  
input or output.  
+2.5 V  
+5 V  
GND  
GND  
GND  
Output  
Output  
Input  
+2.5 V External Reference—Provides a  
reference for wrap-back testing.  
+5 V Power Source—Provides +5 V  
power up to 200 mA.  
PFI 0  
PFI 0—This pin is configurable as either a  
digital trigger or an event counter input.  
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Analog Input  
You can connect analog input signals to the NI USB-6008/6009 through  
the I/O connector. Refer to Table 6 for more information about connecting  
analog input signals.  
Analog Input Circuitry  
Figure 7 illustrates the analog input circuitry of the NI USB-6008/6009.  
+2.5 VREF  
MUX  
PGA  
ADC  
AI FIFO  
30.9 kΩ  
127 kΩ  
AI  
Input Range  
Selection  
39.2 kΩ  
Figure 7. Analog Input Circuitry  
MUX  
The NI USB-6008/6009 has one analog-to-digital converter (ADC).  
The multiplexer (MUX) routes one AI channel at a time to the PGA.  
PGA  
The progammable-gain amplifier provides input gains of 1, 2, 4, 5, 8,  
10, 16, or 20 when configured for differential measurements and gain  
of 1 when configured for single-ended measurements. The PGA gain is  
automatically calculated based on the voltage range selected in the  
measurement application.  
A/D Converter  
The analog-to-digital converter (ADC) digitizes the AI signal by  
converting the analog voltage into a digital code.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
 
AI FIFO  
The NI USB-6008/6009 can perform both single and multiple A/D  
conversions of a fixed or infinite number of samples. A first-in-first-out  
(FIFO) buffer holds data during AI acquisitions to ensure that no data  
is lost.  
Analog Input Modes  
You can configure the AI channels on the NI USB-6008/6009 to take  
single-ended or differential measurements. Refer to Table 6 for more  
information about I/O connections for single-ended or differential  
measurements.  
Connecting Differential Voltage Signals  
For differential signals, connect the positive lead of the signal to the AI+  
terminal, and the negative lead to the AI– terminal.  
AI+  
Voltage  
NI USB-6008/6009  
Source  
AI–  
Figure 8. Connecting a Differential Voltage Signal  
The differential input mode can measure 20 V signals in the 20 V range.  
However, the maximum voltage on any one pin is 10 V with respect to  
GND. For example, if AI 1 is +10 V and AI 5 is –10 V, then the  
measurement returned from the device is +20 V.  
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20  
15  
10  
5
AI 1  
AI 5  
0
Result  
–5  
–10  
–15  
–20  
Figure 9. Example of a Differential 20 V Measurement  
Connecting a signal greater than 10 V on either pin results in a clipped  
output.  
20  
15  
10  
5
AI 1  
0
–5  
AI 5  
Result  
–10  
–15  
–20  
Figure 10. Exceeding 10 V on AI Returns Clipped Output  
Connecting Reference Single-Ended Voltage Signals  
To connect reference single-ended voltage signals (RSE) to the  
NI USB-6008/6009, connect the positive voltage signal to the desired  
AI terminal, and the ground signal to a GND terminal, as illustrated in  
Figure 11.  
When no signals are connected to the analog input terminal, the internal  
resistor divider may cause the terminal to float to approximately 1.4 V  
when the analog input terminal is configured as RSE. This behavior is  
normal and does not affect the measurement when a signal is connected.  
© National Instruments Corporation  
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NI USB-6008/6009 User Guide and Specifications  
 
AI  
Voltage  
Source  
NI USB-6008/6009  
GND  
Figure 11. Connecting a Reference Single-Ended Voltage Signal  
Digital Trigger  
When an AI task is defined, you can configure PFI 0 as a digital trigger  
input. When the digital trigger is enabled, the AI task waits for a rising or  
falling edge on PFI 0 before starting the acquisition. To use ai/Start Trigger  
with a digital source, specify PFI 0 as the source and select rising or falling  
edge.  
Analog Output  
The NI USB-6008/6009 has two independent AO channels that can  
generate outputs from 0–5 V. All updates of AO lines are software-timed.  
Analog Output Circuitry  
Figure 12 illustrates the analog output circuitry for the NI USB-6008/6009.  
+5 V  
REF(+) REF(–)  
12-Bit  
50 Ω  
Output  
Buffer  
AO  
DAC  
GND  
Figure 12. Analog Output Circuitry  
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DACs  
Digital-to-analog converts (DACs) convert digital codes to analog  
voltages.  
Connecting Analog Output Loads  
To connect loads to the NI USB-6008/6009, connect the positive lead of the  
load to the AO terminal, and connect the ground of the load to a GND  
terminal.  
AO  
Load  
NI USB-6008/6009  
GND  
Figure 13. Connecting a Load  
Minimizing Glitches on the Output Signal  
When you use a DAC to generate a waveform, you may observe glitches in  
the output signal. These glitches are normal; when a DAQ switches from  
one voltage to another, it produces glitches due to released charges. The  
largest glitches occur when the most significant bit of the DAC code  
changes. You can build a lowpass deglitching filter to remove some of  
these glitches, depending on the frequency and nature of the output signal.  
Refer to ni.com/supportfor more information about minimizing  
glitches.  
Digital I/O  
The NI USB-6008/6009 has 12 digital lines, P0.<0..7> and P1.<0..3>,  
which comprise the DIO port. GND is the ground-reference signal for the  
DIO port. You can individually program all lines as inputs or outputs.  
© National Instruments Corporation  
21  
NI USB-6008/6009 User Guide and Specifications  
 
Digital I/O Circuitry  
Figure 14 shows P0.<0..7> connected to example signals configured as  
digital inputs and digital outputs. You can configure P1.<0..3> similarly.  
+5 V  
1
LED  
P0.0  
P0.1  
P0.2  
LED  
2
P0.3  
P0.4  
P0.5  
P0.6  
P0.7  
3
4
+5 V  
TTL Signal  
Switch  
GND  
I/O Connector  
1
2
3
4
P0.0 configured as an open collector digital output driving a LED  
P0.2 configured as a active drive digital output driving a LED  
P0.4 configured as a digital input receiving a TTL signal from a gated invertor  
P0.7 configured as a digital input receiving a 0 V or 5 V signal from a switch  
Figure 14. Example of Connecting a Load  
Caution Exceeding the maximum input voltage ratings or maximum output ratings, which  
are listed in the Specifications section, can damage the device and the computer. National  
Instruments is not liable for any damage resulting from such signal connections.  
Source/Sink Information  
The default configuration of the NI USB-6008/6009 DIO ports is open  
collector, allowing 5 V operation, with an onboard 4.7 kΩ pull-up resistor.  
An external user-provided pull-up resistor can be added to increase the  
source current drive up to a 8.5 mA limit per line as shown in Figure 15.  
The NI USB-6009 ports can also be configured as active drive using the  
NI-DAQmx API, allowing 3.3 V operation with a source/sink current limit  
of 8.5 mA. Refer to the NI-DAQmx Help for more information about how  
to set the DIO configuration.  
NI USB-6008/6009 User Guide and Specifications  
22  
ni.com  
 
 
NI USB-6008/6009  
+5 V  
+5 V  
P0.0  
Re  
Rp  
4.7 KΩ Onboard Resistor  
External  
Pull-Up  
Resistor  
Port Pad  
Rl  
Load  
GND  
A
Figure 15. Example of Connecting an External User-Provided Resistor  
Complete the following steps to determine the value of the user-provided  
pull-up resistor:  
1. Place an ammeter in series with the load.  
2. Place a variable resistor between the digital output line and the +5 V.  
3. Adjust the variable resistor until the ammeter current reads as the  
intended current. The intended current must be less than 8.5 mA.  
4. Remove the ammeter and variable resistor from your circuit.  
5. Measure the resistance of the variable resistor. The measured  
resistance is the ideal value of the pull-up resistor.  
6. Select a static resistor value for your pull-up resistor that is greater than  
or equal to the ideal resistance.  
7. Re-connect the load circuit and the pull-up resistor.  
© National Instruments Corporation  
23  
NI USB-6008/6009 User Guide and Specifications  
 
 
I/O Protection  
To protect the NI USB-6008/6009 against overvoltage, undervoltage, and  
overcurrent conditions, as well as ESD events, you should avoid these fault  
conditions by using the following guidelines:  
If you configure a DIO line as an output, do not connect it to any  
external signal source, ground signal, or power supply.  
If you configure a DIO line as an output, understand the current  
requirements of the load connected to these signals. Do not exceed  
the specified current output limits of the DAQ device.  
National Instruments has several signal conditioning solutions for  
digital applications requiring high current drive.  
If you configure a DIO line as an input, do not drive the line with  
voltages outside of its normal operating range. The DIO lines have  
a smaller operating range than the AI signals.  
Treat the DAQ device as you would treat any static sensitive device.  
Always properly ground yourself and the equipment when handling  
the DAQ device or connecting to it.  
Power-On States  
Static DIO  
At system startup and reset, the hardware sets all DIO lines to  
high-impedance inputs. The DAQ device does not drive the signal  
high or low. Each line has a weak pull-up resistor connected to it.  
Each of the NI USB-6008/6009 DIO lines can be used as a static DI or DO  
line. You can use static DIO lines to monitor or control digital signals. All  
samples of static DI lines and updates of DO lines are software-timed.  
You can configure PFI 0 as a source for a gated invertor counter input edge  
count task. In this mode, falling-edge events are counted using a 32-bit  
counter. For more information about event timing requirements, refer to the  
Specifications section.  
NI USB-6008/6009 User Guide and Specifications  
24  
ni.com  
 
Reference and Power Sources  
The NI USB-6008/6009 creates an external reference and supplies a power  
source. All voltages are relative to COM unless otherwise noted.  
+2.5 External References  
The NI USB-6008/6009 creates a high-purity reference voltage supply for  
the ADC using a multi-state regulator, amplifier, and filter circuit. The  
resulting +2.5 V reference voltage can be used as a signal for self test.  
+5 V Power Source  
The NI USB-6008/6009 supplies a 5 V, 200 mA output. This source can be  
used to power external components.  
Note While the device is in USB suspend, the output is disabled.  
Specifications  
The following specifications are typical at 25 °C, unless otherwise noted.  
Converter type........................................ Successive approximation  
Analog Input  
Analog inputs ......................................... 8 single-ended, 4 differential,  
software selectable  
Input resolution  
NI USB-6008 .................................. 12 bits differential,  
11 bits single-ended  
NI USB-6009 .................................. 14 bits differential,  
13 bits single-ended  
Max sampling rate (aggregate)1  
NI USB-6008 .................................. 10 kS/s  
NI USB-6009 .................................. 48 kS/s  
AI FIFO.................................................. 512 bytes  
Timing resolution................................... 41.67 ns (24 MHz timebase)  
1
System dependent.  
© National Instruments Corporation  
25  
NI USB-6008/6009 User Guide and Specifications  
 
 
Timing accuracy .....................................100 ppm of actual sample rate  
Input range  
Single-ended.................................... 10 V  
Differential ...................................... 20 V1, 10 V, 5 V, 4 V,  
2.5 V, 2 V, 1.25 V, 1 V  
Working voltage ..................................... 10 V  
Input impedance .....................................144 kΩ  
Overvoltage protection ........................... 35  
Trigger source.........................................Software or external digital  
trigger  
System noise2  
Single-ended  
10 V range..............................5 mVrms  
Differential  
20 V range .............................5 mVrms  
1 V range................................0.5 mVrms  
Absolute accuracy at full scale, single ended  
Typical at 25 °C  
(mV)  
Maximum over Temperature  
(mV)  
Range  
10  
14.7  
138  
Absolute accuracy at full scale, differential3  
Typical at 25 °C  
(mV)  
Maximum over Temperature  
Range  
20  
(mV)  
14.7  
7.73  
4.28  
3.59  
2.56  
138  
10  
84.8  
58.4  
53.1  
45.1  
5
4
2.5  
1
20 V means that |AI+ – (AI–)| <= 20 V. However, AI+ and AI– must both be within 10 V of GND. Refer to the Connecting  
Differential Voltage Signals for more information.  
2
3
System noise measured at maximum sample rate.  
Input voltages may not exceed the working voltage range.  
NI USB-6008/6009 User Guide and Specifications  
26  
ni.com  
 
Typical at 25 °C  
(mV)  
Maximum over Temperature  
(mV)  
Range  
2
1.25  
1
2.21  
1.70  
1.53  
42.5  
38.9  
37.5  
Analog Output  
Analog outputs ....................................... 2  
Output resolution.................................... 12 bits  
Maximum update rate ............................ 150 Hz, software-timed  
Output range........................................... 0 to +5 V  
Output impedance .................................. 50 Ω  
Output current drive............................... 5 mA  
Power-on state........................................ 0 V  
Slew rate................................................. 1 V/μs  
Short circuit current ............................... 50 mA  
Absolute accuracy (no load) .................. 7 mV typical,  
36.4 mV maximum at full scale  
Digital I/O  
Digital I/O  
P0.<0..7>......................................... 8 lines  
P1.<0..3>......................................... 4 lines  
Direction control .................................... Each channel individually  
programmable as input or output  
Output driver type  
NI USB-6008 .................................. Open collector (open-drain)  
NI USB-6009 .................................. Each channel individually  
programmable as active drive  
(push-pull) or open collector  
(open-drain)  
© National Instruments Corporation  
27  
NI USB-6008/6009 User Guide and Specifications  
 
Compatibility..........................................TTL, LVTTL, CMOS  
Absolute maximum voltage range..........–0.5 to 5.8 V with respect to GND  
Pull-up resistor........................................4.7 kΩ to 5 V  
Power-on state ........................................Input  
Digital logic levels  
Level  
Min  
Max  
Units  
Input low voltage  
Input high voltage  
Input leakage current  
–0.3  
2.0  
0.8  
5.8  
50  
V
V
μA  
Output low voltage (I = 8.5 mA)  
Output high voltage  
0.8  
V
Active drive (push-pull), I = –8.5 mA  
Open collector (open-drain), I = –0.6 mA, nominal  
Open collector (open-drain), I = –8.5 mA, with external  
pull-up resistor  
2.0  
2.0  
2.0  
3.5  
5.0  
V
V
V
External Voltage  
+5 V output (200 mA maximum)...........+5 V typical, +4.85 V minimum  
+2.5 V output (1 mA maximum)............+2.5 V typical  
+2.5 V accuracy......................................0.25% max  
Reference temperature drift....................50 ppm/°C max  
Counter  
Number of counters ................................1  
Resolution...............................................32 bits  
Counter measurements ...........................Edge counting (falling-edge)  
Counter direction ....................................Count up  
Pull-up resistor........................................4.7 kΩ to 5 V  
Maximum input frequency .....................5 MHz  
Minimum high pulse width.....................100 ns  
NI USB-6008/6009 User Guide and Specifications  
28  
ni.com  
 
Minimum low pulse width ..................... 100 ns  
Input high voltage .................................. 2.0 V  
Input low voltage ................................... 0.8 V  
Bus Interface  
USB specification .................................. USB 2.0 Full-Speed  
USB bus speed ....................................... 12 Mb/s  
Power Requirements  
USB  
4.10 to 5.25 VDC............................ 80 mA typical, 500 mA max  
USB suspend................................... 300 μA typical, 500 μA max  
Physical Characteristics  
Dimensions  
Without connectors......................... 6.35 cm × 8.51 cm × 2.31 cm  
(2.50 in. × 3.35 in. × 0.91 in.)  
With connectors .............................. 8.18 cm × 8.51 cm × 2.31 cm  
(3.22 in. × 3.35 in. × 0.91 in.)  
I/O connectors........................................ USB series B receptacle,  
(2) 16 position terminal block  
plug headers  
Weight  
With connectors .............................. 84 g (3 oz)  
Without connectors......................... 54 g (1.9 oz)  
Screw-terminal wiring............................ 16 to 28 AWG  
Torque for screw terminals .................... 0.22–0.25 N · m  
(2.0–2.2 lb · in.)  
© National Instruments Corporation  
29  
NI USB-6008/6009 User Guide and Specifications  
 
Safety  
If you need to clean the module, wipe it with a dry towel.  
Safety Voltages  
Connect only voltages that are within these limits.  
Channel-to-GND .................................... 30 V max,  
Measurement Category I  
Measurement Category I is for measurements performed on circuits not  
directly connected to the electrical distribution system referred to as  
MAINS voltage. MAINS is a hazardous live electrical supply system that  
powers equipment. This category is for measurements of voltages from  
specially protected secondary circuits. Such voltage measurements include  
signal levels, special equipment, limited-energy parts of equipment,  
circuits powered by regulated low-voltage sources, and electronics.  
Caution Do not use this module for connection to signals or for measurements within  
Measurement Categories II, III, or IV.  
Safety Standards  
This product is designed to meet the requirements of the following  
standards of safety for electrical equipment for measurement, control,  
and laboratory use:  
IEC 61010-1, EN 61010-1  
UL 61010-1, CSA 61010-1  
Note For UL and other safety certifications, refer to the product label or visit  
ni.com/certification, search by model number or product line, and click the  
appropriate link in the Certification column.  
Hazardous Locations  
The NI USB-6008/6009 are not certified for use in hazardous locations.  
Environmental  
The NI USB-6008/6009 device is intended for indoor use only.  
Operating temperature  
(IEC 60068-2-1 and IEC 60068-2-2)......0 to 55 °C  
Operating humidity  
(IEC 60068-2-56) ...................................5 to 95% RH, noncondensing  
NI USB-6008/6009 User Guide and Specifications  
30  
ni.com  
 
Maximum altitude.................................. 2,000 m (at 25 °C ambient  
temperature)  
Storage temperature  
(IEC 60068-2-1 and IEC 60068-2-2)..... –40 to 85 °C  
Storage humidity  
(IEC 60068-2-56) .................................. 5 to 90% RH, noncondensing  
Pollution Degree (IEC 60664) ............... 2  
Electromagnetic Compatibility  
This product is designed to meet the requirements of the following  
standards of EMC for electrical equipment for measurement, control,  
and laboratory use:  
EN 61326 EMC requirements; Minimum Immunity  
EN 55011 Emissions; Group 1, Class A  
CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A  
Note For EMC compliance, operate this device with double-shielded cables.  
CE Compliance  
This product meets the essential requirements of applicable European  
Directives, as amended for CE marking, as follows:  
2006/95/EC; Low-Voltage Directive (safety)  
2004/108/EC; Electromagnetic Compatibility Directive (EMC)  
Note Refer to the Declaration of Conformity (DoC) for this product for any additional  
regulatory compliance information. To obtain the DoC for this product, visit  
ni.com/certification, search by module number or product line, and click the  
appropriate link in the Certification column.  
Environmental Management  
National Instruments is committed to designing and manufacturing  
products in an environmentally responsible manner. NI recognizes that  
eliminating certain hazardous substances from our products is beneficial  
not only to the environment but also to NI customers.  
For additional environmental information, refer to the NI and the  
Environment Web page at ni.com/environment. This page contains the  
environmental regulations and directives with which NI complies, as well  
as other environmental information not included in this document.  
© National Instruments Corporation  
31  
NI USB-6008/6009 User Guide and Specifications  
 
Waste Electrical and Electronic Equipment (WEEE)  
EU Customers At the end of their life cycle, all products must be sent to a WEEE recycling  
center. For more information about WEEE recycling centers and National Instruments  
WEEE initiatives, visit ni.com/environment/weee.htm.  
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(For information about China RoHS compliance, go to  
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Where to Go for Support  
The National Instruments Web site is your complete resource for technical  
support. At ni.com/supportyou have access to everything from  
troubleshooting and application development self-help resources to email  
and phone assistance from NI Application Engineers.  
National Instruments corporate headquarters is located at  
11500 North Mopac Expressway, Austin, Texas, 78759-3504.  
National Instruments also has offices located around the world to help  
address your support needs. For telephone support in the United States,  
create your service request at ni.com/supportand follow the calling  
instructions or dial 512 795 8248. For telephone support outside the United  
States, contact your local branch office:  
Australia 1800 300 800, Austria 43 662 457990-0,  
Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,  
Canada 800 433 3488, China 86 21 5050 9800,  
Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,  
Finland 358 (0) 9 725 72511, France 01 57 66 24 24,  
Germany 49 89 7413130, India 91 80 41190000, Israel 972 3 6393737,  
Italy 39 02 41309277, Japan 0120-527196, Korea 82 02 3451 3400,  
Lebanon 961 (0) 1 33 28 28, Malaysia 1800 887710,  
Mexico 01 800 010 0793, Netherlands 31 (0) 348 433 466,  
New Zealand 0800 553 322, Norway 47 (0) 66 90 76 60,  
Poland 48 22 3390150,Portugal 351 210 311 210,Russia 7 495 783 6851,  
Singapore 1800 226 5886, Slovenia 386 3 425 42 00,  
South Africa 27 0 11 805 8197, Spain 34 91 640 0085,  
Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,  
Taiwan 886 02 2377 2222, Thailand 662 278 6777,  
Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 52354  
National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation.  
Refer to the Terms of Use section on ni.com/legalfor more information about National  
Instruments trademarks. Other product and company names mentioned herein are trademarks or trade  
names of their respective companies. For patents covering National Instruments products, refer to the  
appropriate location: Help»Patents in your software, the patents.txtfile on your CD, or  
ni.com/patents.  
© 2004–2007 National Instruments Corporation. All rights reserved.  
371303K-01  
Dec07  
 

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