Portable USB-Based
High-Voltage Digital I/O
NI USB-9421, NI USB-9472, NI USB-9481 NEW!
• Small, portable devices
Operating Systems
(12.1 by 8.6 by 2.5 cm)
• 4 or 8 channels with 24 V
logic levels
• High current-switching capacity
• 250 Vrms 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
• Windows 2000/XP
Recommended Software
• LabVIEW
• LabWindows/CVI
Measurement Services
Software (included)
• NI-DAQmx driver software
• VI Logger Lite data-logging
software
Driver Software1
NI-DAQmx
NI-DAQmx
Product
Bus
USB
USB
USB
Input Lines
8 sink
Output Lines
–
8 source
Isolation
Bank
Bank
Signal Levels
11 to 30 V
6 to 30 V
60 VDC
250 VAC/VDC
Output Current per Channel
Connector
USB-9421
USB-9472
USB-9481
–
Screw Terminal, D-Sub
Screw Terminal, D-Sub
Screw Terminal
–
–
0.75 A
2 A (30 VDC)
1 A (60 VDC)
4 Form A Relay
Bank
NI-DAQmx
1For 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
Common Applications
National Instruments USB-9421, USB-9472, and USB-9481 are data The USB-9421, USB-9472, and USB-9481 are ideal for monitoring
acquisition modules with integrated signal conditioning. They and control applications where easy connectivity and portability are
provide plug-and-play connectivity via USB for faster setup and essential, such as:
measurements, offering four or eight digital input or output channels • Portable industrial monitoring and controlling motors, fans,
specifically designed for monitoring and control applications. The
pumps, relays, and limit switches
NI USB-9421 digital input module accepts high-voltage levels • Data logging
between 11 and 30 V for direct connection to 24 V systems. The • Small form-factor applications
NI USB-9472 can source up to 30 V externally powered at 0.75 A of • Embedded OEM applications
current per channel, and the NI USB-9481 uses electromechanical • In-vehicle data acquisition
relays that can switch 2 A at 30 VDC and 1 A at 60 VDC. In addition, • Academic lab use
these modules include channel-to-earth ground isolation for safety,
noise immunity and high common-mode voltage range.
Information for OEM Customers
For information on special configurations and pricing, please
Software Description
visit ni.com/oem.
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
Recommended Accessories
NI 9934 ......................................................................779104-01
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.
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