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USER GUIDE AND SPECIFICATIONS NI USB-9234 4-Channel, ±5 V , 24-Bit Softwar e-Selectable IEPE and AC/DC Analog Input Module This user guide describes how to use the National Instruments USB-9234 and includes device specifications and co nnector assignments.
NI USB-9234 U ser Guide and Specifications 2 ni.com Dimensions Figure 2 shows the NI USB-9234 device dim ensions. Figure 2. NI USB-9234 Device in Millimeters (Inches) Safety Guidelines Operate the NI USB-9234 only as described in this user guide.
© National Instruments Corporation 3 NI USB-9234 User Guid e and Specifications Safety Guidelines for Hazardous Vo ltages If hazardous voltages are connected to the module, take the following precautions. A hazardous vo ltage is a voltage greater than 42.
NI USB-9234 U ser Guide and Specifications 4 ni.com LabVIEW If you are a new user, use the Getting Started with LabVIEW manual to familiarize yourself with the LabVIEW graphical programming environment and the basic LabVIEW features you use to build data acquisition and instrum ent control applications.
© National Instruments Corporation 5 NI USB-9234 User Guid e and Specifications Measurement Studio If you program your NI-D A Qmx-su pported device in Measurement Studio using V isual C++, V isual C#, or V isu al Basic .NET , you can interactively create channels and tasks by launching the D A Q Assistant from MAX or from within V isual Studio .
NI USB-9234 U ser Guide and Specifications 6 ni.com .NET Languages without NI Application Software W ith the Microsoft .NET Framework v ersion 1.1 or later , you can use NI-D A Qmx to create applications us ing V isual C# and V isual Basic .NET without Measurement Studi o.
© National Instruments Corporation 7 NI USB-9234 User Guid e and Specifications Installing the Software Software support for the NI USB-92 34 for Windows Vist a/XP/2000 is provided by NI-DAQmx. The DAQ Getting S tarted Guide , which you can download at ni.
NI USB-9234 U ser Guide and Specifications 8 ni.com 3. Align the I/O module with the carrier , as sho wn in Figure 3. Figure 3. Module Installation 4. Squeeze the latches and insert the NI 9234 module into the NI USB-9162 carrier .
© National Instruments Corporation 9 NI USB-9234 User Guid e and Specifications Mounting the NI USB-9234 Threaded inserts are located in the NI USB-9234 for mounting it to a panel.
NI USB-9234 U ser Guide and Specifications 10 ni.com LED Indicator The NI USB-9234 device has a green LED next to the USB connector. The LED indicator indicates device stat us, as listed in Table 1.
© National Instruments Corporation 11 NI USB-9234 User Guid e and Specifications Wiring the NI USB-9234 The NI USB-9234 has four BNC connectors that provide connection s to four simultaneousl y sampled analog input channels. Each channel has a BNC connector to which you can conn ect a signal source.
NI USB-9234 U ser Guide and Specifications 12 ni.com Connecting Signal Sources to the NI USB-9234 You can connect ground-referenced or floating signal sensors to the NI USB-9234.
© National Instruments Corporation 13 NI USB-9234 User Guid e and Specifications NI USB-9234 Circuitr y The NI USB-9234 analog input channels are referenced to chassis groun d through a 50 Ω resistor. To minimize ground noise, m ake sure that the chassis ground is connected to earth ground.
NI USB-9234 U ser Guide and Specifications 14 ni.com The NI USB-9234 also has TEDS circuitry . F or more information about TEDS, go to ni.com/info and enter rdteds .
© National Instruments Corporation 15 NI USB-9234 User Guid e and Specifications Stopband The filter significantly attenuates all si gnals above the stopband frequency . The primary goal of the filter is to prevent aliasing. Th erefore, the stopband frequency scales precisely with the data rate.
NI USB-9234 U ser Guide and Specifications 16 ni.com Specifications The following specifications are ty pical for the range 0 to 60 °C unless otherwise noted. Input Characteristics Number of channels .............. ...... ............4 analog input channels ADC resolution .
© National Instruments Corporation 17 NI USB-9234 User Guid e and Specifications AC cutoff frequency response Input range .. ................. ................. ......... ±5 V AC voltage full-scale range Minimum ..... ................. .............
NI USB-9234 U ser Guide and Specifications 18 ni.com Overvoltage protection (with respect to chassis ground) For a signal source connected to AI+ and AI– ............ ................ ....±30 V For a low-impedance sou rce connected to AI+ and AI– .
© National Instruments Corporation 19 NI USB-9234 User Guid e and Specifications Phase nonlinearity ( f s = 51.2 kS/s) ...... ................. ......... ±0.45° max Stopband Frequency................. ................ ....... 0.55 · f s Rejection .
NI USB-9234 U ser Guide and Specifications 20 ni.com Power Requirements Current consumption from USB ............ . 500 mA, max Suspend mode ................ ................. . 2.5 mA, max Bus Interface USB specifi cation ......... ..................
© National Instruments Corporation 21 NI USB-9234 User Guid e and Specifications Safety Standards This product is designed to meet the requirements of the follow ing standards of safety for electrica.
NI USB-9234 U ser Guide and Specifications 22 ni.com CE Compliance This product meets the essential re quirements of applicable European Directives, as amended fo r CE marking, as follows: • 2006/95.
National Instruments, NI, ni.com, and LabVIEW are tradem arks of National Instruments Corporation. Refer to t he Terms of Use section on ni.com/legal for m ore inform ation about Natio nal Instruments trademarks. Other product and compan y names mentioned herein are trademarks or trade names of their respective companie s.
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