English dropdown-ico

National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 manual

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 should contain:
- informations concerning technical data of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237
- name of the manufacturer and a year of construction of the National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 item
- rules of operation, control and maintenance of the National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the National Instruments service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the National Instruments 24-Bit Half/Full-Bridge Analog Input Module NI 9237 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

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

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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’ [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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+[...]

  • 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 [...]

  • 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+[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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 [...]

  • 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[...]

  • 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.[...]

  • 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 [...]

  • 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......... ........... [...]

  • 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 ......[...]

  • 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 ..... ..[...]

  • 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 [...]

  • 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 , [...]

  • 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[...]

  • 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 ...... ............ [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]