NI 9239 Datasheet - National Instruments

1 DATASHEETNI 92394 AI, 10 V, 24 Bit, 50 kS/s/ch Simultaneous BNC or screw-terminal connectivity Anti-alias filters 250 Vrms, CAT II, channel-to-channel isolation (screwterminal); 60 VDC, CAT I, channel-to-channel isolation(BNC)The NI 9239 is an analog input module for use in NI CompactDAQ or CompactRIO channel provides a 10 V measurement range at a 24-bit resolution. The NI 9239 outputs50 kS/s of data at the maximum sampling rate. Designed for both speed and accuracy, theNI 9239 is an effective general-purpose analog module because of its resolution, sample rate,and input ContentsAccessories NI 9971 Backshell Connector Kit (Screw Terminal) EMI Suppression Ferrite (BNC) NI 9239 NI 9239 Getting Started GuideSpring-Terminal,DSUB 10 V 10 V 10 V16-Bit16-Bit16-BitYesYesYes100 kS/s/ch500 kS/s/ch1 MS/s/chNI 9220NI 9222NI 92234416 Screw-Terminal,BNCS crew-Terminal,BNC 10 VScrew-Terminal,Spring-Terminal,BNC16-Bi tYes100 kS/s/chNI 92154 ConnectivitySampleRateChannelsProductNam eSignalLevelsC SERIES DIFFERENTIAL INPUT MODULE COMPARISONR esolutionSimultaneous 60 V24-BitYes50 kS/s/chNI 92294 Screw-Terminal,BNC 10 V24-BitYes50 kS/s/chNI 92394 Screw-Terminal,BNCNI C Series OverviewNI provides more than 100 C Series modules for measurement, control, and communicationapplications.

2 C Series modules can connect to any sensor or bus and allow for high-accuracymeasurements that meet the demands of advanced data acquisition and control applications. Measurement-specific signal conditioning that connects to an array of sensors and signals Isolation options such as bank-to-bank, channel-to-channel, and channel-to-earth ground -40 C to 70 C temperature range to meet a variety of application and environmentalneeds Hot-swappableThe majority of C Series modules are supported in both CompactRIO and CompactDAQplatforms and you can move modules from one platform to the other with no | | NI 9239 DatasheetCompactRIOC ompactRIO combines an open-embedded architecturewith small size, extreme ruggedness, and C Seriesmodules in a platform powered by the NI LabVIEW reconfigurable I/O (RIO) architecture.

3 Each systemcontains an FPGA for custom timing, triggering, andprocessing with a wide array of available modular I/O tomeet any embedded application is a portable, rugged data acquisition platformthat integrates connectivity, data acquisition, and signalconditioning into modular I/O for directly interfacing to anysensor or signal. Using CompactDAQ with LabVIEW, youcan easily customize how you acquire, analyze, visualize, andmanage your measurement Professional Development System for Windows Use advanced software tools for large project development Generate code automatically using DAQ Assistant and InstrumentI/O Assistant Use advanced measurement analysis and digital signal processing Take advantage of open connectivity with DLLs, ActiveX, and.

4 NETobjects Build DLLs, executables, and MSI installersNI LabVIEW FPGA Module Design FPGA applications for NI RIO hardware Program with the same graphical environment used for desktop andreal-time applications Execute control algorithms with loop rates up to 300 MHz Implement custom timing and triggering logic, digital protocols, andDSP algorithms Incorporate existing HDL code and third-party IP including Xilinx IPgenerator functions Purchase as part of the LabVIEW Embedded Control and MonitoringSuiteNI 9239 Datasheet | National Instruments | 3NI LabVIEW Real-Time Module Design deterministic real-time applications with LabVIEW graphical programming Download to dedicated NI or third-party hardware for reliableexecution and a wide selection of I/O Take advantage of built-in PID control, signal processing, andanalysis functions Automatically take advantage of multicore CPUs or setprocessor affinity manually Take advantage of real-time OS, development and debuggingsupport.

5 And board support Purchase individually or as part of a LabVIEW suiteNI 9239 Input CircuitryAI+AI ADCA mplifierOvervoltage ProtectionPrefilterNI 9239 Input signals on each channel are conditioned, buffered, and then sampled by an ADC. Each AI channel provides an independent signal path and ADC, enabling you to sampleall channels NI 9239 uses a combination of analog and digital filtering to provide an accuraterepresentation of in-band signals and reject out-of-band signals. The filters discriminatebetween signals based on the frequency range, or bandwidth, of the signal. The three importantbandwidths to consider are the passband, the stopband, and the anti-imaging NI 9239 represents signals within the passband, as quantified primarily by passband rippleand phase nonlinearity.

6 All signals that appear in the alias-free bandwidth are either unaliasedsignals or signals that have been filtered by at least the amount of the stopband signals within the passband have frequency-dependent gain or attenuation. The smallamount of variation in gain with respect to frequency is called the passband flatness. Thedigital filters of the NI 9239 adjust the frequency range of the passband to match the data , the amount of gain or attenuation at a given frequency depends on the data | | NI 9239 DatasheetFigure 1. Typical Passband Response for the NI 9239 Frequency/Data Rate (Hz) (dB)StopbandThe filter significantly attenuates all signals above the stopband frequency. The primary goalof the filter is to prevent aliasing.

7 Therefore, the stopband frequency scales precisely with thedata rate. The stopband rejection is the minimum amount of attenuation applied by the filter toall signals with frequencies within the BandwidthAny signals that appear in the alias-free bandwidth are not aliased artifacts of signals at ahigher frequency. The alias-free bandwidth is defined by the ability of the filter to rejectfrequencies above the stopband frequency. The alias-free bandwidth is equal to the data rateminus the stopband RatesThe frequency of a master timebase (fM) controls the data rate (fs) of the NI 9239. The NI 9239includes an internal master timebase with a frequency of MHz, but the module also canaccept an external master timebase or export its own master timebase.

8 To synchronize the datarate of an NI 9239 with other modules that use master timebases to control sampling, all of themodules must share a single master timebase following equation provides the available data rates of the NI 9239: = 256 where n is any integer from 1 to , the data rate must remain within the appropriate data rate range. When using theinternal master timebase of MHz, the result is data rates of 50 kS/s, 25 kS/s, kS/s,NI 9239 Datasheet | National Instruments | 5and so on down to kS/s, depending on the value of n. When using an external timebasewith a frequency other than MHz, the NI 9239 has a different set of data The NI 9151 R Series Expansion chassis does not support sharing timebasesbetween 9239 SpecificationsThe following specifications are typical for the range -40 C to 70 C unless otherwise voltages are relative to the AI- signal on each channel unless otherwise Do not operate the NI 9239 in a manner not specified in this misuse can result in a hazard.

9 You can compromise the safety protectionbuilt into the product if the product is damaged in any way. If the product isdamaged, return it to NI for CharacteristicsNumber of channels4 analog input channelsADC resolution24 bitsType of ADCD elta- sigma (with analog prefiltering)Sampling modeSimultaneousInternal master timebase (fM) MHzAccuracy 100 ppm maximumData rate range (fs) using internal master kS/sMaximum50 kS/sData rate range (fs) using external master kS/s6 | | NI 9239 DatasheetFigure 2. Data Rates1 (fs) 256 , =1, 2, .., 31 Input voltage ranges (AI+ to AI-)Nominal 10 VTypical VMinimum VOvervoltage protection 100 VInput couplingDCInput impedance (AI+ to AI-)1 M Table 1.

10 NI 9239 AccuracyMeasurement ConditionsPercent of Reading(Gain Error)Percent of Range2(Offset Error) CalibratedTypical (25 C, 5 C) (-40 C to 70 C) (25 C, 5 C) (-40 C to 70 C) noise70 VrmsStabilityGain drift 5 ppm/ COffset drift 26 V/ CPost-calibration gain match(channel-to-channel, 20 kHz) dB maximumPhase /kHz maximumModule-to-module( /kHz fin) + (360 fin/fM)Phase nonlinearity (fs = 50 kS/s) maximum1 The data rate must remain within the appropriate data rate equals V3 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modeswhere the calibration constants stored in the module are not applied to the 9239 Datasheet | National Instruments | 7 Figure 3.