National Instruments NI USB-6008 Bedienungsanleitung

A quick guide to National Instruments USB-6009 and USB-

6008 multifunction I/O devices

Figure 1: The USB-6009 (USB-6008 is similar)

Table of contents:

1 Introduction

2 Labeling the I/O terminals

3 Connecting the USB-6009 to the PC

4 Testing and configuring the USB-6009 in MAX. Video included!

5 Using the USB-6009 in LabVIEW.Video included!

1 Introduction

This document is a quick guide to NI USB-6009 multifunction I/O device, and to the similar NI USB-

6008 device. In the following only the name USB-6009 is used. Special USB-6008 features are

described separately.

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The NI USB-6009 is a USB based data acquisition (DAQ) and control device with analog input and

output and digital input and output. The price is 2100 NOK. The NI USB-6008 is a similar, but

somewhat simpler (and cheaper) device.

The main features of NI USB-6009 are as follows (the USB-6008 features which differs, are also

given):

lAnalog input (AI): 8 inputs with referenced single ended signal coupling or 4 inputs with

differential signal coupling. Software-configurable voltage ranges: ±20V, ±10V, ±5V, ±4V,

±2.5V, ±2V, ±1.25V, ±1V. Max sampling rate is 48kS/s (48000 samples per second). 14 bits AD

converter (USB-6008: 12 bits).

lAnalog output (AO): 2 outputs. Voltage range is 0 -5V (fixed). Output rate is 150Hz

(samples/second). 12 bits DA converter.

lDigital input (DI) and digital output (DO): 12 channels which can be used as either DI or DO

(configured individually). These 12 channels are organized in ports, with Port 0 having lines 0, ..,

7, and Port 1 having lines 0, .., 3. Input low is between -0.3V and +0.8V. Input high is between

2.0V and +5.8V. Output low is below 0.8V. Output high is above 2V (with open-drain and push-

pull as options). (USB-6008 has only open-drain output.)

lCounter: 32 bits. Counting on falling edge.

lOn-board voltage sources (available at individual terminals): 2.5V and 5.0V

lPower: USB-6009 is powered via the USB cable.

lConfiguring and testing: USB-6009 can be configured and tested using MAX (Measurement

and Automation Explorer) 4.0, which is installed with NI-DAQ 8.0. The latter is available on the

CD shipped with the device, and can alternatively be downloaded for free from http://ni.com (the

NI-DAQ 8.0 file is approximately 0,5GB).

lApplication software: LabVIEW, C, or Visual Studio. Platforms: Windows, Mac, Linux. The

present document gives an example of how to use USB-6009 in LabVIEW.

lDocumentation: The following relevant documents can be found at http://ni.com:

¡USB-6009 product home page

¡USB-6009 Data Sheet (which is available from the product home page)

¡Getting Started Guide: NI-DAQmx for USB Devices (which is available from the product

home page). This document explains how to test the device in Measurement and

Automation Explorer (MAX).

¡USB-6008/6009 User Guide and Specifications (which is available from the product home

page). This document shows in detail how USB-6008 must be connected to external signals

for measurement or control.

[Table of contents]

2 Labeling the I/O terminals

Before you start using the USB-6009, you should attach labels to the analog and digital terminals.

Figure 2 below shows the analog I/O terminals with labels assuming differential signal coupling. (In

general, differential signal coupling is preferrable to single ended coupling due to better DC noise

suppression).

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Figure 2: The analog I/O terminals with labels assuming differential signal coupling

Figure 3 below shows the digital I/O terminals with connections for the individual lines. P0 is port 0,

and P1 is port 1. For example, P0.3 is line 3 in port 0.

Figure 3: The digital I/O terminals

The USB-6008/6009 User Guide and Specifications describes the I/O terminals in detail.

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[Table of contents]

3 Connecting USB-6009 to the PC

The first time you connect the USB-6009 to the PC, the Windows Hardware Installer Wizard will open,

see Figure 4.

Figure 4: The Windows Hardware Installer Wizard (in Norwegian version...)

In this dialog window, select the option for automatic install.

Then, the wizard searches the PC for the necessary driver software for the USB-6009. This driver

software was installed along with the installation of the NI-DAQ software.

When the wizard has finished the installation of the driver software, the USB-6009 is ready for use

(after you click Finish (Norwegian: Fullfør)), see Figure 5.

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Figure 5: The wizard has finished the installation of the driver software, and the USB-6009 is ready for use, after you click Finish

(Norwegian: Fullfør)

If you disconnect the USB-6009 from your PC, and then connect it again later, the New Data

Acquisition Device dialog window pops up, giving you several options, see Figure 6.

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Figure 6: The New Data Acquisition Device dialog window

Probably, you will now want to test and configure the USB-6009 in MAX. You may therefore select

one of the upper two options. However, here I assume that you select Cancel. Thus, we will open MAX

in the ordinary way via the Start menu on the PC.

[Table of contents]

4 Testing and configuring the USB-6009 in MAX

Testing the USB-6009 in MAX

Before you start to use the USB-6008 in an application, you should test the device in the MAX utility,

which is available via Start / Programs / National Instruments. Figure 7 shows MAX.

Here is a video that shows the steps: max.avi (9 minutes, 104 MB)

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Figure 7: MAX (Measurement and Automation Explorer)

In the MAX window, expand the Devices and Interfaces item, see Figure 8. .

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Figure 8: The Devices and Interfaces item

If MAX recognizes the USB-6009, the device appears under NI-DAQmx Devices.

Assuming that MAX recognizes the device, you can now run a self-test of it by selecting Self-Test in

the menu.

Hopefully the self-test passes without errors. Then, you should test the individual channels of the USB-

6009 to check that the input signals are detected correctly by the USB-6009, and that the output signals

generated by the USB-6009 have correct values. This I/O can be tested in several ways, depending on

which channels you actually want to test. Here, let us test analog output channel 0 (AO0) and the

analog input channel 0 (AI0) to see if they work correctly. We will perform a very simple test, which is

sufficient if we are to check that both AO0 and AI0 work correctly. The test procedure, which is

denoted loopback, is to connect the AI0 channel to the AO0 channel. Then we generate some legal

voltage at AO0. If AI0 detects the same voltage, we know that both AO0 and AI0 works. (We may then

repeat this procedure for other channels.) If for some reason AI0 detects some other voltage than the

value we set for AO0, then there is an error in either the AI0 channel or in the the AO0 channel, and

further investigations are necessary.

To prepare for the loopback test, we wire together AI0 and AO0. To see the terminals of the USB-6009,

select Device Pinouts in the menu shown in Figure 8. The terminals or pins are shown in the NI-

DAQmx Device Terminals window, see Figure 9.

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Figure 9: The terminals or pins are shown in the NI-DAQmx Device Terminals window

Figure 10 shows the AI0 and AO0 channels wired together.

Figure 10: To prepare for the loopback test, AI0 and AO0 are wired together.

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To actually perform the loopback test, right-click on the device labeled NI USB-6009: "Dev1" in

MAX, and then select Test Panels, thereby opening the Test Panels. In the Test Panels window, select

the Voltage Output tab, see Figure 11.

Figure 11: The Voltage Output dialog window in the Test Panels window

In the Voltage Output dialog window, select any voltage between 0V and 5V. In Figure 11, an output

voltage of 3.57V is set.

Next, click the Analog Input tab in the Test Panels window, see Figure 12. You may deselect Auto-

scale chart in the window.

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