National Instruments NI USB-6008 User manual

USER GUIDE AND SPECIFICATIONS
USB-6008/6009
This guide describes how to use the National Instruments USB-6008/6009
data acquisition (DAQ) devices and lists specifications.
Contents
Introduction............................................................................................. 2
Safety Guidelines .................................................................................... 3
Software .................................................................................................. 5
VI Logger................................................................................................ 5
Hardware................................................................................................. 6
Setting Up Hardware............................................................................... 7
I/O Connector.......................................................................................... 8
Signal Descriptions ................................................................................. 10
Analog Input ........................................................................................... 11
Analog Input Circuitry..................................................................... 11
MUX......................................................................................... 11
PGA .......................................................................................... 11
A/D Converter .......................................................................... 11
AI FIFO .................................................................................... 12
Analog Input Modes ........................................................................ 12
Connecting Differential Voltage Signals.................................. 12
Connecting Reference Single-Ended Voltage Signals ............. 13
Digital Trigger ................................................................................. 14
Analog Output......................................................................................... 14
Analog Output Circuitry .................................................................. 14
DACs ........................................................................................ 14
Connecting Analog Output Loads ................................................... 15
Minimizing Glitches on the Output Signal ...................................... 15
Digital I/O ............................................................................................... 15
Digital I/O Circuitry......................................................................... 15
Source/Sink Information.................................................................. 16
I/O Protection.......................................................................................... 17
Power-On States .............................................................................. 18
Static DIO ........................................................................................ 18
Event Counter ......................................................................................... 18

USB-6008/6009 User Guide and Specifications 2 ni.com
Reference and Power Sources .................................................................18
+2.5 External References .................................................................18
+5 V Power Source...........................................................................18
Specifications...........................................................................................19
Analog Input.....................................................................................19
Analog Output ..................................................................................20
Digital I/O.........................................................................................21
External Voltage...............................................................................21
Counter .............................................................................................22
Bus Interface.....................................................................................22
Power Requirements.........................................................................22
Physical Characteristics....................................................................22
Safety................................................................................................23
Standards ...................................................................................23
Voltages.....................................................................................23
Hazardous Locations .................................................................24
Environmental ..................................................................................24
Electromagnetic Compatibility.........................................................24
CE Compliance.................................................................................25
Where to Go for Support .........................................................................26
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.
Table 1. Differences Between the USB-6008 and USB-6009
Feature USB-6008 USB-6009
AI Resolution 12 bits differential,
11 bits single-ended
14 bits differential,
13 bits single-ended
Maximum AI Sample Rate*10 kS/s 48 kS/s
DIO Configuration Open-drain Open-drain or push-pull
*Might be system dependent.

©National Instruments Corporation 3 USB-6008/6009 User Guide and Specifications
Figure 1. USB-6008/6009
Figure 2. USB-6008/6009 Back View
Safety Guidelines
Caution Operate the hardware only as described in these operating instructions.
The following section contains important safety information that you must
follow when installing and using the USB-6008/6009.
Do not operate the 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.
1 USB Cable Strain Relief
NI USB-6009
8 Inputs, 14-bit, Multifunction I/O
32 Digital 17
1 Analog 16
1

USB-6008/6009 User Guide and Specifications 4 ni.com
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 voltages2and 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 MAINS3voltage. 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 Working Voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.
3 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.

©National Instruments Corporation 5 USB-6008/6009 User Guide and Specifications
• 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.
Software
Software support for the USB-6008/6009 for Windows 2000/XP is
provided by NI-DAQmx.
The NI-DAQmx CD contains example programs that you can use to get
started programming with the USB-6008/6009. Refer to the NI-DAQmx for
USB Devices Getting Started Guide for more information.
Note For information about non-Windows operating system support, refer to
ni.com/info and enter rddqld.
VI Logger
The NI-DAQmx CD includes VI Logger Lite which is an easy-to-use
configuration-based tool specifically designed for data logging
applications. The application is available at Start»All Programs»
National Instruments»VI Logger.

USB-6008/6009 User Guide and Specifications 6 ni.com
Hardware
The following block diagram shows key functional components of the
USB-6008/6009.
Figure 3. Device Block Diagram
P1.<0..3>
P0.<0..7>
Digital I/O Terminal Block
AI <0..7>
AO 0
AO 1
Analog I/O Terminal Block
+2.5 V/CAL
+5 V/200 mA
8 Channel
12/14b ADC
12b DAC
12b DAC
USB Microcontroller
SPI
External
Power
Supply
Vbus
Full-Speed USB Interface
USB
PFI 0

©National Instruments Corporation 7 USB-6008/6009 User Guide and Specifications
Setting Up Hardware
Complete the following steps to set up the hardware:
1. Install combicon screw terminal blocks by inserting them into the
combicon jacks.
Note The USB-6008/6009 kit ships with signal labels. You can apply the signal labels to
the screw terminal blocks for easy signal identification.
2. Refer to Table 2 and Figure 4 for 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. Refer to Figure 4 for more information about
signal label orientation.
Figure 4. 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 USB-6008/6009 device.
3. Connect the wiring to the appropriate screw terminals.
1 Overlay Label with Pin Orientation Guides
2 Combicon Jack
3 Signal Labels
4 USB Cable
3
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USB-6008/6009 User Guide and Specifications 8 ni.com
I/O Connector
The 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 2 lists the analog terminal assignments, and Table 3 lists the digital
terminal assignments.
Table 2. Analog Terminal Assignments
Module Terminal
Signal,
Single-Ended Mode
Signal,
Differential Mode
1GND GND
2AI 0 AI 0+
3AI 4 AI 0–
4GND GND
5AI 1 AI 1+
6AI 5 AI 1–
7GND GND
8AI 2 AI 2+
9AI 6 AI 2–
10 GND GND
11 AI 3 AI 3+
12 AI 7 AI 3–
13 GND GND
14 AO 0 AO 0
15 AO 1 AO 1
16 GND GND
12345678910111213141516

©National Instruments Corporation 9 USB-6008/6009 User Guide and Specifications
Table 3. Digital Terminal Assignments
Module Terminal Signal
17 P0.0
18 P0.1
19 P0.2
20 P0.3
21 P0.4
22 P0.5
23 P0 6
24 P0.7
25 P1.0
26 P1.1
27 P1.2
28 P1.3
29 PFI 0
30 +2.5 V
31 +5 V
32 GND
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

USB-6008/6009 User Guide and Specifications 10 ni.com
Signal Descriptions
Table 4 describes the signals available on the I/O connectors.
Table 4. 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> Var i es 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
<AI3,AI7>.
AO 0 GND Output Analog Channel 0 Output—Supplies the
voltage output of AO channel 0.
AO 1 GND Output Analog Channel 1 Output—Supplies the
voltage output of AO channel 1.
P1.<0..3>
P0.<0..7>
GND Input or Output Digital I/O Signals—You can
individually configure each signal as an
input or output.
+2.5 V GND Output +2.5 V External Reference—Provides a
reference for wrap-back testing.
+5 V GND Output +5 V Power Source—Provides +5 V
power up to 200 mA.
PFI 0 GND Input PFI 0—This pin is configurable as either a
digital trigger or an event counter input.