Page 2 - Note
NI 9234 Operating Instructions and Specifications 2 ni.com This doc u ment describes how to u se the National Instr u ments 9234 and incl u des specifications and connector assignments for the NI 9234. Visit ni.com/info and enter rd s oftwarever s ion to determine which software yo u need for the mo...
Page 3 - Safety Guidelines; Hot Surface; Safety Guidelines for Hazardous Locations; not; not
© National Instruments Corp. 3 NI 9234 Operating Instructions and Specifications Safety Guidelines Operate the NI 9234 only as described in these operating instr u ctions. Hot Surface This icon denotes that the component may be hot. To u ching this component may res u lt in bodily inj u ry. Safety G...
Page 4 - Special Conditions for Hazardous Locations Use in Europe
NI 9234 Operating Instructions and Specifications 4 ni.com Caution S u bstit u tion of components may impair s u itability for Class I, Division 2. Caution For Zone 2 applications, install the system in an enclos u re rated to at least IP 54 as defined by IEC 60529 and EN 60529. Caution For Zone 2 a...
Page 5 - Special Conditions for Marine Applications
© National Instruments Corp. 5 NI 9234 Operating Instructions and Specifications Special Conditions for Marine Applications Some mod u les are Lloyd’s Register (LR) Type Approved for marine applications. To verify Lloyd’s Register certification, visit ni.com/certification and search for the LR certi...
Page 6 - r BNC connectors that provide connections to
NI 9234 Operating Instructions and Specifications 6 ni.com Connecting the NI 9234 The NI 9234 has fo u r BNC connectors that provide connections to fo u r sim u ltaneo u sly sampled analog inp u t channels. Figure 1. NI 9234 Connector Assignments AI3+AI3– AI2+AI2– AI0+AI0– AI1+AI1–
Page 7 - Connecting Signal Sources to the NI 9234; Specifications
© National Instruments Corp. 7 NI 9234 Operating Instructions and Specifications Each channel has a BNC connector to which yo u can connect a signal so u rce. Yo u can also enable excitation c u rrent on a per-channel basis to connect Integrated Electronics Piezoelectric (IEPE) sensors. Refer to the...
Page 8 - Refer to Fig
NI 9234 Operating Instructions and Specifications 8 ni.com Refer to Fig u res 2 and 3 for ill u strations of connecting gro u nded and floating signal so u rces to the NI 9234. Figure 2. Connecting a Grounded Signal Source to the NI 9234 NI 9234 AI+ AI– + – Signal Source CommonModeVoltage
Page 12 - The NI 9234 also has TEDS circ
NI 9234 Operating Instructions and Specifications 12 ni.com Figure 5. Measurement Error Introduced by Common-Mode Bias Current The NI 9234 also has TEDS circ u itry. For more information abo u t TEDS, go to ni.com/info and enter rdted s . NI 9234 AI+ AI– + – Signal Source AI– Lead Impedance CommonMo...
Page 13 - Understanding NI 9234 Filtering; Passband
© National Instruments Corp. 13 NI 9234 Operating Instructions and Specifications Understanding NI 9234 Filtering The NI 9234 u ses a combination of analog and digital filtering to provide an acc u rate representation of in-band signals while rejecting o u t-of-band signals. The filters discriminate...
Page 15 - Stopband
© National Instruments Corp. 15 NI 9234 Operating Instructions and Specifications Stopband The filter significantly atten u ates all signals above the stopband freq u ency. The primary goal of the filter is to prevent aliasing. Therefore, the stopband freq u ency scales precisely with the data rate....
Page 16 - Understanding NI 9234 Data Rates
NI 9234 Operating Instructions and Specifications 16 ni.com Understanding NI 9234 Data Rates The freq u ency of a master timebase ( f M ) controls the data rate ( f s ) of the NI 9234. The NI 9234 incl u des an internal master timebase with a freq u ency of 13.1072 MHz, b u t the mod u le also can a...
Page 17 - Sleep Mode
© National Instruments Corp. 17 NI 9234 Operating Instructions and Specifications of 13.1072 MHz, the res u lt is data rates of 51.2 kS/s, 25.6 kS/s, 17.067 kS/s, and so on down to 1.652 kS/s, depending on the val u e of n . When u sing an external timebase with a freq u ency other than 13.1072 MHz,...
Page 18 - Input Characteristics
NI 9234 Operating Instructions and Specifications 18 ni.com Specifications The following specifications are typical for the range – 40 to 70 °C u nless otherwise noted. Input Characteristics N u mber of channels .......................... 4 analog inp u t channels ADC resol u tion .....................
Page 20 - AC c
NI 9234 Operating Instructions and Specifications 20 ni.com AC c u toff freq u ency response Frequency (Hz) 10 4 0.5 0.0 –0.5 –1.0 3 2 1 0 9 8 7 6 5 Gain (dB)
Page 23 - Acc; Measurement Conditions
© National Instruments Corp. 23 NI 9234 Operating Instructions and Specifications Acc u racy 1 1 Refer to the NI 9234 Circuitry section for information regarding gro u nded signal so u rces and meas u rement acc u racy. Measurement Conditions Percent of Reading (Gain Error) Percent of Range * (Offse...
Page 25 - Minim; Idle channel noise and noise density; Idle Channel
© National Instruments Corp. 25 NI 9234 Operating Instructions and Specifications Alias-free bandwidth ........................ 0.45 · f s Oversample rate ................................ 64 · f s Crosstalk (1 kHz) .............................. –110 dB CMRR ( f in ≤ 1 kHz) Minim u m ..................
Page 26 - Intermod; Contact NI for Bellcore MTBF specifications; Input
NI 9234 Operating Instructions and Specifications 26 ni.com Total harmonic distortion (THD) Intermod u lation distortion (–1 dBFS) DIN 250 Hz/8 kHz4:1 amplit u de ratio ..................... –80 dB CCIF 11 kHz/12 kHz1:1 amplit u de ratio ..................... –93 dB MTBF ...............................
Page 27 - Power Requirements
© National Instruments Corp. 27 NI 9234 Operating Instructions and Specifications Power Requirements Power cons u mption from chassis Active mode ............................... 900 mW maxSleep mode ................................. 25 μ W max Thermal dissipation (at 70 °C) Active mode ................
Page 28 - Safety; Safety Voltages; MAINS
NI 9234 Operating Instructions and Specifications 28 ni.com Safety Safety Voltages Connect only voltages that are within the following limits. Channel-to-earth gro u nd ................... ±30 V max, Meas u rement Category I Isolation Channel-to-channel .................... NoneChannel-to-earth gro ...
Page 29 - Hazardous Locations; Online Product Certification
© National Instruments Corp. 29 NI 9234 Operating Instructions and Specifications Hazardous Locations U.S. (UL) .......................................... Class I, Division 2, Gro u ps A, B, C, D, T4; Class I, Zone 2,AEx nA IIC T4 Canada (C-UL) ................................. Class I, Division 2, ...
Page 30 - Electromagnetic Compatibility
NI 9234 Operating Instructions and Specifications 30 ni.com Electromagnetic Compatibility This prod u ct meets the req u irements of the following EMC standards for electrical eq u ipment for meas u rement, control, and laboratory u se: • EN 61326 (IEC 61326): Class A emissions; Basic imm u nity • E...
Page 31 - CE Compliance
© National Instruments Corp. 31 NI 9234 Operating Instructions and Specifications CE Compliance This prod u ct meets the essential req u irements of applicable E u ropean Directives as follows: • 2006/95/EC; Low-Voltage Directive (safety) • 2004/108/EC; Electromagnetic Compatibility Directive (EMC) ...
Page 32 - Shock and Vibration; Environmental
NI 9234 Operating Instructions and Specifications 32 ni.com Shock and Vibration To meet these specifications, yo u m u st panel mo u nt the system. Operating vibration Random (IEC 60068-2-64)......... 5 g rms , 10 to 500 Hz Sin u soidal (IEC 60068-2-6) ....... 5 g, 10 to 500 Hz Operating shock(IEC 6...
Page 33 - Environmental Management; NI and the
© National Instruments Corp. 33 NI 9234 Operating Instructions and Specifications Operating h u midity (IEC 60068-2-56).............................. 10 to 90% RH, noncondensing Storage h u midity (IEC 60068-2-56).............................. 5 to 95% RH, noncondensing Maxim u m altit u de............
Page 34 - Waste Electrical and Electronic Equipment (WEEE); EU Customers; must; Calibration; ⬉ᄤֵᙃѻક∵ᵻࠊᄣ⧚ࡲ⊩ ˄Ё; RoHS; National Instruments; about China RoHS compliance, go to
NI 9234 Operating Instructions and Specifications 34 ni.com Waste Electrical and Electronic Equipment (WEEE) EU Customers At the end of their life cycle, all prod u cts must be sent to a WEEE recycling center. For more information abo u t WEEE recycling centers and National Instr u ments WEEE initia...
Page 35 - Where to Go for Support
© National Instruments Corp. 35 NI 9234 Operating Instructions and Specifications Where to Go for Support The National Instr u ments Web site is yo u r complete reso u rce for technical s u pport. At ni.com/ s upport yo u have access to everything from tro u bleshooting and application development s...
