Portable USB-Based
High-Voltage Digital I/O
NI USB-9421, NI USB-9472, NI USB-9481
NEW!
• Small, portable devices
(12.1 by 8.6 by 2.5 cm)
• 4 or 8 channels with 24 V
logic levels
• High current-switching capacity
• 250 V
rms
channel-to-earth
ground isolation
• Plug-and-play connectivity
via USBs
• Screw-terminal and D-Sub
connectors for direct wiring to
industrial sensors and actuators
Operating Systems
• Windows 2000/XP
Recommended Software
• LabVIEW
• LabWindows/CVI
Measurement Services
Software (included)
• NI-DAQmx driver software
• VI Logger Lite data-logging
software
Product
USB-9421
USB-9472
USB-9481
1
For
Bus
USB
USB
USB
Input Lines
8 sink
–
–
Output Lines
–
8 source
4 Form A Relay
Isolation
Bank
Bank
Bank
Signal Levels
11 to 30 V
6 to 30 V
60 VDC
250 VAC/VDC
Output Current per Channel
–
0.75 A
2 A (30 VDC)
1 A (60 VDC)
Connector
Screw Terminal, D-Sub
Screw Terminal, D-Sub
Screw Terminal
Driver Software
1
NI-DAQmx
NI-DAQmx
NI-DAQmx
up-to-date information on NI-DAQ, visit
ni.com/support/daq/versions.htm.
Table 1. Portable USB DAQ for High-Voltage Digital I/O Selection Guide
Hardware Description
National Instruments USB-9421, USB-9472, and USB-9481 are data
acquisition modules with integrated signal conditioning. They
provide plug-and-play connectivity via USB for faster setup and
measurements, offering four or eight digital input or output channels
specifically designed for monitoring and control applications. The
NI USB-9421 digital input module accepts high-voltage levels
between 11 and 30 V for direct connection to 24 V systems. The
NI USB-9472 can source up to 30 V externally powered at 0.75 A of
current per channel, and the NI USB-9481 uses electromechanical
relays that can switch 2 A at 30 VDC and 1 A at 60 VDC. In addition,
these modules include channel-to-earth ground isolation for safety,
noise immunity and high common-mode voltage range.
Common Applications
The USB-9421, USB-9472, and USB-9481 are ideal for monitoring
and control applications where easy connectivity and portability are
essential, such as:
• Portable industrial monitoring and controlling motors, fans,
pumps, relays, and limit switches
• Data logging
• Small form-factor applications
• Embedded OEM applications
• In-vehicle data acquisition
• Academic lab use
Information for OEM Customers
For information on special configurations and pricing, please
visit
ni.com/oem
.
Software Description
The USB-9421, USB-9472, and USB-9481 all use NI-DAQmx
high-performance, multithreaded driver software for interactive
configuration and data acquisition on Windows OSs. Use
NI-DAQmx to test channels, generate code, and apply custom
functionality to any of your measurements. All NI data acquisition
devices shipped with NI-DAQmx also include VI Logger Lite
configuration-based data-logging software.
Ordering Information
NI USB-9421
Screw Terminals ........................................................779451-01
D-Sub Connector......................................................779452-01
NI USB-9472
Screw Terminals ........................................................779449-01
D-Sub Connector......................................................779450-01
NI USB-9481 ................................................................779453-01
Accessories
NI 9934 ......................................................................779104-01
Recommended Accessories
The USB-9421, USB-9472, and USB-9481 all have built-in screw-
terminal connectivity, so no additional accessories are required. The
USB-9421 and USB-9472 are also available with D-Sub connector
options that connect to the NI 9934 strain relief accessory, or any
other standard 25-pin D-Sub connector.
BUY NOW!
For complete product specifications, pricing, and accessory
information, call (800) 813 3693 (U.S. only) or go to
ni.com/oem
.
NI Services and Support
NI has the services and support to meet your
needs around the globe and through the
application life cycle – from planning
and development through deployment
and ongoing maintenance. We offer
services and service levels to meet
customer requirements in research,
design, validation, and manufacturing.
Visit
ni.com/services
.
Local Sales and Technical Support
In offices worldwide, our staff is local to the country, giving you
access to engineers who speak your language. NI delivers industry-
leading technical support through online knowledge bases, our
applications engineers, and access to 14,000 measurement and
automation professionals within NI Developer Exchange forums.
Find immediate answers to your questions at
ni.com/support
.
We also offer service programs that provide automatic upgrades to
your application development environment and higher levels of
technical support. Visit
ni.com/ssp
.
SERVICE
NEEDS
Training and Certification
NI training is the fastest, most certain route to productivity with our
products. NI training can shorten your learning curve, save
development time, and reduce maintenance costs over the
application life cycle. We schedule instructor-led courses in cities
worldwide, or we can hold a course at your facility. We also offer a
professional certification program that identifies individuals who
have high levels of skill and knowledge on using NI products.
Visit
ni.com/training
.
Hardware Services
NI Factory Installation Services
NI Factory Installation Services (FIS) is the fastest and easiest way to
use your PXI or PXI/SCXI combination systems right out of the box.
Trained NI technicians install the software and hardware and
configure the system to your specifications. NI extends the standard
warranty by one year on hardware components (controllers, chassis,
modules) purchased with FIS. To use FIS, simply configure your
system online with
ni.com/pxiadvisor
.
Professional Services
Our Professional Services Team is comprised of NI applications
engineers, NI Consulting Services, and a worldwide National Instruments
Alliance Partner program of more than 600 independent consultants
and integrators. Services
range from start-up assistance
to turnkey system integration.
Visit
ni.com/alliance
.
Calibration Services
NI recognizes the need to maintain properly calibrated devices for
high-accuracy measurements. We provide manual calibration
procedures, services to recalibrate your products, and automated
calibration software specifically designed for use by metrology
laboratories. Visit
ni.com/calibration
.
Repair and Extended Warranty
OEM Support
We offer design-in consulting and product integration assistance
if you want to use our products for OEM applications. For
information about special pricing and services for OEM customers,
visit
ni.com/oem
.
NI provides complete repair services for our products. Express repair
and advance replacement services are also available. We offer
extended warranties to help you meet project life-cycle requirements.
Visit
ni.com/services
.
ni.com
• (800) 813 3693
National Instruments • info@ni.com
© 2005 National Instruments Corporation. All rights reserved. CVI, LabVIEW, Measurement Studio, National Instruments, National Instruments Alliance Partner,
NI, ni.com, NI-DAQ, and SCXI are trademarks of National Instruments. Other product and company names listed are trademarks or trade names of their respective
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