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Bedienungsanleitung National Instruments NI 9237

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  • National Instruments NI 9237 - page 1

    OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9237 4-Channel, 24-Bit Half/Full- Bridge Analog Input Module ni.com/manuals Deutsch Français ...

  • National Instruments NI 9237 - page 2

    NI 9237 Operating I nstruction s and Specificati ons 2 ni.com This doc u ment describes ho w to u se the National Instr u ments 9 237 and incl u des specif ications and pin assignments for the NI 9237. Vi s i t ni.com/info and enter rd s oftwarever s ion to determine which software yo u need for the mod u les yo u are u sing. For information abo u ...

  • National Instruments NI 9237 - page 3

    © National Inst ruments Corp. 3 NI 9237 Operating Instructi ons and Specific ations Safety Guidelines Operate the NI 9237 only as described in these operating instr u ctions. Hot Surface This icon denotes that the component may be hot. T o u ching this component may res u lt in bodily inj u ry . Safety Guidelines fo r Hazardous Loca tions The NI 9 ...

  • National Instruments NI 9237 - page 4

    NI 9237 Operating I nstruction s and Specificati ons 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 b y IEC 60529 an d EN 60529 . Caution For Zone 2 applications, connected signals m u st be wit ...

  • National Instruments NI 9237 - page 5

    © National Inst ruments Corp. 5 NI 9237 Operating Instructi ons and Specific ations Special Conditions fo r Marine Appli cations Some mod u les are Lloyd’ s Re gister (LR) T ype Approved for marine applications. T o verify Llo yd’ s Register cert ification, visit ni.com/certification and search for the LR certificate, or look for the Lloyd’ ...

  • National Instruments NI 9237 - page 6

    NI 9237 Operating I nstruction s and Specificati ons 6 ni.com Connecting the NI 9237 The NI 9237 has fo u r RJ-50 receptacles that pro vide connections for fo u r half or f u ll bridges. Figure 1. NI 9237 Pin Assignm ents SC AI+ AI– RS+ RS– EX+ EX– T+ T– SC 1 2 3 4 5 6 7 8 9 10 Ch0 – Ch3 EX+ EX+ EX– EX– Ch 0 Ch 1 Ch 2 Ch 3 ...

  • National Instruments NI 9237 - page 7

    © National Inst ruments Corp. 7 NI 9237 Operating Instructi ons and Specific ations When yo u connect a half bridge to the NI 9237, yo u m u st connect the AI+, EX–, and RS– signals, b u t yo u do not connect the AI– signal. When yo u connect a f u ll bridge, yo u m u st connect the AI+, AI–, EX–, and RS– si gnals. Re fer to Fig u re 2 ...

  • National Instruments NI 9237 - page 8

    NI 9237 Operating I nstruction s and Specificati ons 8 ni.com The NI 9237 has a fo u r- terminal e xternal e xcitation v oltage so u rce connector . Y o u can u se the EX+ and EX– terminals on the connector to connect one e x ternal e xcitation voltag e so u rce to the mod u le. Y o u can u se the additional EX+ and EX– terminals on the connect ...

  • National Instruments NI 9237 - page 9

    © National Inst ruments Corp. 9 NI 9237 Operating Instructions and Specific ations Figure 2. Connecting a Half or Full Bridge to the NI 9237 EX+ EX– SC SC RS+ RS– T+ T– AI– AI+ TEDS NI 9237 ...

  • National Instruments NI 9237 - page 10

    NI 9237 Operating I nstructions and Specifications 10 ni.com Each channel on the NI 9237 has an independent 24-bit ADC and an inp u t amplifier that enable yo u to sample signals from all fo u r channels sim u ltaneo u sly . The NI 9237 is isolated from earth gro u nd. Ho wev er, the indi vid u al channels are not isolated from each other . The EX+ ...

  • National Instruments NI 9237 - page 11

    © National Inst ruments Corp. 11 NI 9237 Operating Instructions and Specific ations Wiring TEDS Cha nnels Ens u re that neither the TEDS da ta (T+) nor the TEDS ret u rn (T–) signal is tied in common to any AI signals on the NI 9237. The NI 9237 connects all the T– signals together internally . V isit ni.com/info and enter the info code rdted ...

  • National Instruments NI 9237 - page 12

    NI 9237 Operating I nstructions and Specifications 12 ni.com circ u it. Refer to Fig u re 3 for an ill u stration of ho w to connect remote sense wires to the NI 9237. Figure 3. Connecti ng Remote Sense Wires to the NI 9237 EX+ EX– RS+ RS– R bridge R lead R lead R bridge R bridge R bridge NI 9237 AI– AI+ ...

  • National Instruments NI 9237 - page 13

    © National Inst ruments Corp. 13 NI 9237 Operating Instructions and Specific ations The act u al bridge e xcitation voltage is smaller than the v oltage at the EX+ and EX– leads. If yo u do not u se remote sensing of the act u al bridge voltage, the res u lting gain error is: for half-bridge sensors and for f u ll-bridge sensors. If yo u connect ...

  • National Instruments NI 9237 - page 14

    NI 9237 Operating I nstructions and Specifications 14 ni.com sensors beca u se th ere may be signif icant resistance in the wiring to the activ e resistor in the bridge. The NI 9237 sh u nt calibrati on circ u itry consists of a precision resistor and a software-controlle d switch. Refer to the software help for information abo u t enabling the sh ...

  • National Instruments NI 9237 - page 15

    © National Inst ruments Corp. 15 NI 9237 Operating Instructions and Specific ations Excitation Voltages Altho u gh the sensor ind u stry does not recognize a single standard excita tion v oltage le vel, e xcitation v oltage le vels of between 2.5 V and 10 V are common. Y o u can program the NI 9237 to s u pply 2.5 V , 3.3 V , 5 V , or 10 V of exci ...

  • National Instruments NI 9237 - page 16

    NI 9237 Operating I nstructions and Specifications 16 ni.com The 150 mW limit allows yo u to po wer half and f u ll bridges as follows: •F o u r 350 Ω half bridges at 5.0 V •F o u r 350 Ω f u ll bridges at 3.3 V •F o u r 120 Ω half bridges at 2.5 V If yo u need an e xcitation voltage that ca u ses more than 150 mW to dissipate across all t ...

  • National Instruments NI 9237 - page 17

    © National Inst ruments Corp. 17 NI 9237 Operating Instructions and Specific ations or signals that ha ve been f iltered by at least the amo u nt of the stopband rejection. Passband The signals within the passband have freq u enc y-dependent gain or atten u ation. The small am o u nt of var iation in gain with respect to freq u ency is called the ...

  • National Instruments NI 9237 - page 18

    NI 9237 Operating I nstructions and Specifications 18 ni.com Figure 4. Typical Passband Flat ness for the NI 9237 Stopband The filter signif icantly atten u ates all signals abo ve the stop band freq u ency . The primary goal of the f ilter is to prev ent aliasing. Therefore, the stopband freq u ency scales precisel y with the data F requency/Data ...

  • National Instruments NI 9237 - page 19

    © National Inst ruments Corp. 19 NI 9237 Operating Instructions and Specific ations rate. The stopband rejection is the minim u m amo u nt of att en u ation applied by the filter to all signals with freq u en cies within the stopband. Alias-Free Bandwidth Any signal that appears in the alias-free bandwidth of the NI 9237 is not an aliased artifact ...

  • National Instruments NI 9237 - page 20

    NI 9237 Operating I nstructions and Specifications 20 ni.com The follo wing eq u ation provide s the a vailable da ta rates of the NI 9237: f s = where n is any inte ger from 1 to 31. Howe ver , the data rate m u st rema in within the appropriate data rate range. Refer to the Specifications sectio n for more information abo u t the data rate range. ...

  • National Instruments NI 9237 - page 21

    © National Inst ruments Corp. 21 NI 9237 Operating Instructions and Specific ations s u pport for sleep mode. If the chassis s u pports sleep mode, refer to the software help for information abo u t enabli ng slee p mode. V isit ni.com/info and enter c s erie s doc for information abo u t C Series doc u mentation. T ypically , when a system is in ...

  • National Instruments NI 9237 - page 22

    NI 9237 Operating I nstructions and Specifications 22 ni.com T ype of ADC ..... ........... ........... ......... . De lta-Sigma (w ith analog prefiltering) Sampling mode . ........... ........... .......... Sim u ltaneo u s Internal master timebase ( f M ) Freq u ency ..... ........... ........... ........ 12.8 MHz Acc u racy......... ........... ...

  • National Instruments NI 9237 - page 23

    © National Inst ruments Corp. 23 NI 9237 Operating Instructions and Specific ations Overv oltage protection between any two pins .......... ............. . ±30 V Acc u racy Gain drift ...... ........... ......... ............ ..... 10 ppm/°C max Offset drift 2.5 V excitation ............ ........... ... 0.6 μ V/V per °C 3.3 V excitation ...... ...

  • National Instruments NI 9237 - page 24

    NI 9237 Operating I nstructions and Specifications 24 ni.com Channel-to-channel ma tching (calibrated) Phase nonlineari ty f in = 0 to 1 kHz ....... ........... ......... . < 0.001° f in = 0 to 20 kHz.............. ........... . ±0. 1° Inp u t delay .......... ........... ........... ........ 38.4/ f s + 4.8 μ s Passband Freq u ency ..... .. ...

  • National Instruments NI 9237 - page 25

    © National Inst ruments Corp. 25 NI 9237 Operating Instructions and Specific ations Rejection at o versa mple rate 1 f s = 10 kS/s........ ............ ........... ... 60 dB @ 640 kHz f s = 50 kS/s........ ............ ........... ... 90 dB @ 3.2 MHz Common-mode vo ltage, all signals to earth gro u nd ......... ........ ±60 VDC CMRR Relati ve to ...

  • National Instruments NI 9237 - page 26

    NI 9237 Operating I nstructions and Specifications 26 ni.com Inp u t noise Excitation noise ........... ......... ........... . 0 .1 mV/V rms Crosstalk f in = 1 kHz ....... ........... ............ ..... 110 dB f in = 10 kHz .............. ......... .......... 100 dB Excitation Internal voltage ........ ........... ........ 2.5 V , 3.3 V , 5.0 V , ...

  • National Instruments NI 9237 - page 27

    © National Inst ruments Corp. 27 NI 9237 Operating Instructions and Specific ations Sh u nt calibration Resistance .............. ......... ............ 100 k Ω Resistor acc u racy 25°C .............. .................. ..... ±110 Ω –40 to 70°C ......... ............ ..... ±200 Ω MTBF .......... ........... ............ ........... ... 60 ...

  • National Instruments NI 9237 - page 28

    NI 9237 Operating I nstructions and Specifications 28 ni.com Physical Characteristics If yo u need to clean the mod u l e, wipe it with a dry to wel. W eight .......... ........... ............ .............. 152 g (5.4 oz) Safety Safety Voltages Connect only v oltages that are within the follo wing limits. Between any two pins ...... ............ ...

  • National Instruments NI 9237 - page 29

    © National Inst ruments Corp. 29 NI 9237 Operating Instructions and Specific ations meas u rements of voltages from spec ially protecte d secondary circ u its. S u ch v oltage meas u reme nts incl u de signal le vels, special eq u ipment, limited-ene rg y parts of eq u ipment , circ u its po wered by reg u lated lo w-voltage so u rces, and electro ...

  • National Instruments NI 9237 - page 30

    NI 9237 Operating I nstructions and Specifications 30 ni.com Safety Standards This prod u ct meets the req u irements of the following standards of safety for electrica l eq u ipment for meas u rement, control, and laboratory u se: • IEC 61010-1, EN 61010-1 • UL 61010-1, CSA 61010-1 Note For UL and other safety certif icat ions, refer to the pr ...

  • National Instruments NI 9237 - page 31

    © National Inst ruments Corp. 31 NI 9237 Operating Instructions and Specific ations Note For the standards applied to assess the EMC of this prod u ct, refer to the Online Product Certification section. Note For EMC compliance, operate this de vice with shielded cabling. CE Compliance This prod u ct meets the essent ial req u irem ents of applic a ...

  • National Instruments NI 9237 - page 32

    NI 9237 Operating I nstructions and Specifications 32 ni.com Shock and Vibration T o meet thes e 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 60068-2-27)........... ........... ........ 30 ...

  • National Instruments NI 9237 - page 33

    © National Inst ruments Corp. 33 NI 9237 Operating Instructions and Specific ations 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.......... ......... .......... 2,000 m Poll u tion ...

  • National Instruments NI 9237 - page 34

    NI 9237 Operating I nstructions and Specifications 34 ni.com Waste Electrical and Electronic Equipment (WEEE) EU Customers At the end of the life c ycle, all prod u cts must be sent to a WEEE re c ycling center . For more information abo u t WEEE recycling ce nters and National Instr u ments WEEE initiati ves, visit ni.com/ environment/weee . Calib ...

  • National Instruments NI 9237 - page 35

    © National Inst ruments Corp. 35 NI 9237 Operating Instructions and Specific ations Where to Go for Support The National Instr u ments W eb site is yo u r complete reso u rce for technical s u pport. At ni.com/ s upport yo u have access to ev erything from tro u bleshooting and applic ation dev elopment self-help reso u rces to email and phone ass ...

  • National Instruments NI 9237 - page 36

    © 2006–2008 Nati onal Instruments Corp. All rights reserved. 374186C-01 Aug08 National Instruments, NI, n i .com, and LabVIEW are trademarks of National Instruments C orporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments t rademarks. Other product and company names ment ioned herein are tra ...

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