National Instruments NI USB-9234 User Manual Download

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USER GUIDE AND SPECIFICATIONS

NI USB-9234

4-Channel, ±5 V, 24-Bit Software-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 connector assignments.

Introduction

The NI USB-9234 consists of two components: an NI 9234 module and an
NI USB-9162 carrier, as shown in Figure 1.

Figure 1.

NI USB-9234 Components

NI 9234

NI USB-9162

NI USB-9234

HI-

Speed USB

Carrier

NI U

SB-91

Hi-

Speed

USB Carrier

NI U

SB-91

Summary of Contents for NI USB-9234

Page 1: ...nstruments USB 9234 and includes device specifications and connector assignments Introduction The NI USB 9234 consists of two components an NI 9234 module and an NI USB 9162 carrier as shown in Figure 1 Figure 1 NI USB 9234 Components NI 9234 NI USB 9162 NI USB 9234 H I S p e e d U S B C a r r i e r N I U S B 9 1 6 2 H i S p e e d U S B C a r r i e r N I U S B 9 1 6 2 ...

Page 2: ...efer to the Specifications section for more details Hot Surface This icon denotes that the component may be hot Touching this component may result in bodily injury Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not the remove module unless power has been switched off or the area is known to be nonhazardou...

Page 3: ...ut writing applications for taking measurements and controlling measurement devices The following references to documents assume you have NI DAQmx 8 8 or later and where applicable version 7 1 or later of the NI application software NI DAQmx for Windows The DAQ Getting Started Guide describes how to install your NI DAQmx for Windows software your NI DAQmx supported DAQ device and how to confirm th...

Page 4: ... NI DAQmx Getting Started Getting Started with DAQ Includes overview information and a tutorial to learn how to take an NI DAQmx measurement in LabVIEW using the DAQ Assistant VI and Function Reference Measurement I O VIs and Functions Describes the LabVIEW NI DAQmx VIs and properties Taking Measurements Contains the conceptual and how to information you need to acquire and analyze measurement dat...

Page 5: ...nt Studio refer to the NI Measurement Studio Help which is fully integrated with the Microsoft Visual Studio NET help To view this help file in Visual Studio NET select Measurement Studio NI Measurement Studio Help To create an application in Visual C Visual C or Visual Basic NET follow these general steps 1 In Visual Studio NET select File New Project to launch the New Project dialog box 2 Find t...

Page 6: ...y Using the Measurement Studio NET Class Libraries to view conceptual topics for using NI DAQmx with Visual C and Visual Basic NET To get to the same help topics from within Visual Studio go to Help Contents Select Measurement Studio from the Filtered By drop down list and follow the previous instructions Device Documentation and Specifications Documentation for supported devices and accessories i...

Page 7: ...started programming with the NI USB 9234 Refer to the NI DAQmx for USB Devices Getting Started Guide that shipped with your device which is also accessible from Start All Programs National Instruments NI DAQ for more information Installing the NI USB 9234 Device Before installing the device you must install the software you plan to use with the device Refer to the Installing the Software section o...

Page 8: ... Squeeze the latches and insert the NI 9234 module into the NI USB 9162 carrier 5 Press firmly on the connector side of the NI 9234 module until the latches lock the module into place as shown in Figure 4 Figure 4 Locking Module into Place H i S p e e d U S B C a r r i e r N I U S B 9 1 6 2 H i S p e e d U S B C a r r i e r N I U S B 9 1 6 2 ...

Page 9: ...sions Connecting the NI USB 9234 to a Computer Plug one end of the USB cable into the NI USB 9234 and the other end into an available USB port on the computer Refer to the NI DAQmx for USB Devices Getting Started Guide that shipped with your device which is also accessible from Start All Programs National Instruments NI DAQ for more information Threaded Insert M3 x 0 5 8 5 mm 0 34 in Max Depth 72 ...

Page 10: ...nnection If your device is not blinking make sure your computer has the latest version of NI DAQmx installed on it and that the computer is not in standby mode Table 1 LED State Device Status LED State Device Status Not lit Device not connected or in suspend On not blinking Device connected but no module installed Single blink Operating normally Double blink Connected to USB Full Speed port Device...

Page 11: ...h you can connect a signal source You can also enable excitation current on a per channel basis to connect Integrated Electronic Piezoelectric IEPE sensors The center pin of the connector AI provides the DC signal connection The shell of the connector AI provides the excitation return path and AC signal ground reference Refer to Figure 6 for the connector assignments for each channel Figure 6 NI U...

Page 12: ...ntact with overvoltages within the overvoltage protection range Refer to the Specifications section for more information about operating voltages and overvoltage protection Figures 7 and 8 illustrate connecting grounded and floating signal sources to the NI USB 9234 Figure 7 Connecting a Grounded IEPE Sensor to the NI USB 9234 Figure 8 Connecting a Floating IEPE Sensor to the NI USB 9234 The NI US...

Page 13: ...nput Circuitry for One Channel The NI USB 9234 uses common mode bias current to bias the current limiting diodes when IEPE current is turned off When using grounded signal sources this current causes an error that is dependent on the AI lead impedance This error is approximately 50 ppm of range and 15 ppm of reading per Ω of AI impedance The common mode bias current causes an error only with groun...

Page 14: ...latness and phase nonlinearity The filters reject frequencies within the stopband as much as possible as quantified by stopband rejection All signals that appear in the alias free bandwidth are either unaliased signals or signals that have been filtered by at least the amount of the stopband rejection Passband The signals within the passband have frequency dependent gain or attenuation The small a...

Page 15: ...Understanding NI USB 9234 Data Rates The frequency of a master timebase fM controls the data rate fs of the NI USB 9234 The NI USB 9234 includes an internal master timebase with a frequency of 13 1072 MHz but the module also can accept an external master timebase or export its own master timebase Refer to the software help for information about configuring the master timebase source for the NI USB...

Page 16: ...alog prefiltering Sampling mode Simultaneous Type of TEDS supported IEEE 1451 4 TEDS Class I interface Internal master timebase fM Frequency 13 1072 MHz Accuracy 50 ppm max Data rate range fs using internal master timebase Minimum 1 652 kS s Maximum 51 2 kS s Data rate range fs using external master timebase Minimum 0 391 kS s Maximum 52 734 kS s Data rates fs n 1 2 31 Input coupling AC DC softwar...

Page 17: ...inimum 2 0 mA Typical 2 1 mA Power on glitch 90 mA for 10 ms IEPE compliance voltage 19 V max If you are using an IEPE sensor use the following equation to make sure that your configuration meets the IEPE compliance voltage range must be 0 to 19 where Vcommon mode is the common mode voltage of the NI USB 9234 Vbias is the bias voltage of the IEPE sensor Vfull scale is the full scale voltage of IEP...

Page 18: ...hannel matching Gain Typical 0 01 dB Maximum 0 04 dB Phase fin in kHz fin 0 045 0 04 max Passband Frequency 0 45 fs Flatness fs 51 2 kS s 40 mdB pk to pk max 1 Refer to the NI USB 9234 Circuitry section for information regarding grounded signal sources and measurement accuracy Measurement Conditions Percent of Reading Gain Error Percent of Range Offset Error Calibrated max 40 to 70 C 0 34 0 03 dB ...

Page 19: ...FS 120 dB Idle channel noise and noise density Input impedance Differential 305 kΩ AI shield to chassis ground 50 Ω Total harmonic distortion THD Intermodulation distortion 1 dBFS DIN 250 Hz 8 kHz 4 1 amplitude ratio 80 dB CCIF 11 kHz 12 kHz 1 1 amplitude ratio 93 dB Idle Channel 51 2 kS s 25 6 kS s 2 048 kS s Noise 97 dBFS 99 dBFS 103 dBFS 50 μVrms 40 μVrms 25 μVrms Noise density 310 nV Hz 350 nV...

Page 20: ... channel No isolation between channels Channel to earth ground No isolation between channels and earth ground Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage MAINS is a hazardous live electrical supply system that powers equipment This category is for measurements of voltages from specially p...

Page 21: ...ertified for use in hazardous locations Environmental The NI USB 9234 device is intended for indoor use only Operating temperature 0 to 60 C Storage temperature 40 to 85 C Ingress protection IP 40 Operating humidity IEC 60068 2 56 10 to 90 RH noncondensing Storage humidity IEC 6008 2 56 5 to 95 RH noncondensing Maximum altitude 2 000 m Pollution Degree IEC 60664 2 Electromagnetic Compatibility Thi...

Page 22: ...al not only to the environment but also to NI customers For additional environmental information refer to the NI and the Environment Web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as other environmental information not included in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of th...

Page 23: ...ional Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions or dial 512 795 8248 For telephone support outside the United States contact your local branch office Australia 1800 300 800 Austria 43 662 457990 0 Belgium 32 0 2 757 0020 Brazil ...

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