Hardware Description

National Instruments USB-9221 is a data acquisition module with

integrated signal conditioning that provides plug-and-play

connectivity via USB for faster setup and measurements. This

module has eight single-ended analog input channels with an

extended input range of ±60 V for direct connection to industrial

sensors. With a maximum single-channel sampling rate of 800 kS/s,

the NI USB-9221 is the fastest device in the USB DAQ with

signal conditioning family. In addition, this module includes

channel-to-earth ground isolation for safety, noise immunity and

high common-mode voltage range. With both screw-terminal and

standard D-Sub connector options for this module, you can obtain

flexible and low-cost signal wiring.

Software Description

The USB-9221 uses 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 scaling to any of your measurements. All NI data

acquisition devices shipped with NI-DAQmx also include VI Logger

Lite configuration-based data-logging software.

Recommended Accessories

The USB-9221 has built-in screw terminals or a D-Sub connector

option that connects to the NI 9934 strain relief accessory, or any

other standard 25-pin D-Sub connector.

Common Applications

The USB-9221 is ideal for high-voltage applications where small size

and portability are essential, such as:

• Portable data logging – log voltage data quickly and easily

• Academic lab use – obtain academic discounts for quantities

• Industrial testing – take measurements of high-voltage

transformers, batteries, and other electronics

• Embedded OEM applications

• In-vehicle data acquisition

Information for OEM Customers

For information on special configurations and pricing, please

Portable USB-Based DAQ

for High Voltages

• Small, portable device

(12.1 by 8.6 by 2.5 cm)

• 8 analog inputs at 12-bit resolution

• ±60 V input range

• 800 kS/s aggregate sampling rate

• Built-in, removable connectors

for easier and more cost-

effective connectivity

ground isolation

• Plug-and-play connectivity

via USB

• Bus-powered

Operating Systems

• Windows 2000/XP

Recommended Software

• LabVIEW

• LabWindows/CVI

• Measurement Studio

Measurement Services

Software (included)

• NI-DAQmx driver software

• VI Logger Lite data-logging

software

Product

Signal Type

Channels (SE)

Input Resolution (bits)

Maximum Sampling Rate

(kS/s)

Input Range (V)

Connector

USB-9221

Voltage

8

12

800

±60

Screw Terminal, D-Sub

NI-DAQmx

Table 1. Portable USB DAQ for High Voltages Selection Guide

NI USB-9221

Screw Terminals ........................................................779439-01

D-Sub Connector......................................................779440-01

Accessories

NI 9934 ......................................................................779104-01

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Ordering Information