National-instruments 24-Bit Half/Full-Bridge Analog Input Module NI 923 Manual do Utilizador Página 1

OPERATING INSTRUCTIONS AND SPECIFICATIONSNI 92374-Channel, 24-Bit Half/Full-Bridge Analog Input Module ni.com/manualsDeutschFrançais

NI 9237 Operating Instructions and Specifications 10 ni.comEach channel on the NI 9237 has an independent 24-bit ADC and an input amplifier that enabl

© National Instruments Corp. 11 NI 9237 Operating Instructions and SpecificationsWiring TEDS ChannelsEnsure that neither the TEDS data (T+) nor the TE

NI 9237 Operating Instructions and Specifications 12 ni.comcircuit. Refer to Figure 3 for an illustration of how to connect remote sense wires to the

© National Instruments Corp. 13 NI 9237 Operating Instructions and SpecificationsThe actual bridge excitation voltage is smaller than the voltage at t

NI 9237 Operating Instructions and Specifications 14 ni.comsensors because there may be significant resistance in the wiring to the active resistor in

© National Instruments Corp. 15 NI 9237 Operating Instructions and SpecificationsExcitation VoltagesAlthough the sensor industry does not recognize a

NI 9237 Operating Instructions and Specifications 16 ni.comThe 150 mW limit allows you to power half and full bridges as follows:•Four 350 Ω half brid

© National Instruments Corp. 17 NI 9237 Operating Instructions and Specificationsor signals that have been filtered by at least the amount of the stop

NI 9237 Operating Instructions and Specifications 18 ni.comFigure 4. Typical Passband Flatness for the NI 9237StopbandThe filter significantly attenu

© National Instruments Corp. 19 NI 9237 Operating Instructions and Specificationsrate. The stopband rejection is the minimum amount of attenuation app

NI 9237 Operating Instructions and Specifications 2 ni.comThis document describes how to use the National Instruments 9237 and includes specifications

NI 9237 Operating Instructions and Specifications 20 ni.comThe following equation provides the available data rates of the NI 9237: fs = where n is an

© National Instruments Corp. 21 NI 9237 Operating Instructions and Specificationssupport for sleep mode. If the chassis supports sleep mode, refer to

NI 9237 Operating Instructions and Specifications 22 ni.comType of ADC... Delta-Sigma (with analog prefiltering)Samp

© National Instruments Corp. 23 NI 9237 Operating Instructions and SpecificationsOvervoltage protectionbetween any two pins... ±3

NI 9237 Operating Instructions and Specifications 24 ni.comChannel-to-channel matching (calibrated)Phase nonlinearityfin = 0 to 1 kHz...

© National Instruments Corp. 25 NI 9237 Operating Instructions and SpecificationsRejection at oversample rate1fs = 10 kS/s...

NI 9237 Operating Instructions and Specifications 26 ni.comInput noiseExcitation noise ... 0.1 mV/VrmsCrosstalkfin = 1 kH

© National Instruments Corp. 27 NI 9237 Operating Instructions and SpecificationsShunt calibrationResistance... 100 kΩ

NI 9237 Operating Instructions and Specifications 28 ni.comPhysical CharacteristicsIf you need to clean the module, wipe it with a dry towel.Weight...

© National Instruments Corp. 29 NI 9237 Operating Instructions and Specificationsmeasurements of voltages from specially protected secondary circuits.

© National Instruments Corp. 3 NI 9237 Operating Instructions and SpecificationsSafety GuidelinesOperate the NI 9237 only as described in these operat

NI 9237 Operating Instructions and Specifications 30 ni.comSafety StandardsThis product meets the requirements of the following standards of safety fo

© National Instruments Corp. 31 NI 9237 Operating Instructions and SpecificationsNote For the standards applied to assess the EMC of this product, ref

NI 9237 Operating Instructions and Specifications 32 ni.comShock and VibrationTo meet these specifications, you must panel mount the system.Operating

© National Instruments Corp. 33 NI 9237 Operating Instructions and SpecificationsOperating humidity(IEC 60068-2-56)... 10 t

NI 9237 Operating Instructions and Specifications 34 ni.comWaste Electrical and Electronic Equipment (WEEE)EU Customers At the end of the life cycle,

© National Instruments Corp. 35 NI 9237 Operating Instructions and SpecificationsWhere to Go for SupportThe National Instruments Web site is your comp

© 2006–2008 National Instruments Corp. All rights reserved.374186C-01 Aug08National Instruments, NI, ni.com, and LabVIEW are trademarks of National In

NI 9237 Operating Instructions and Specifications 4 ni.comCaution Substitution of components may impair suitability for Class I, Division 2.Caution Fo

© National Instruments Corp. 5 NI 9237 Operating Instructions and SpecificationsSpecial Conditions for Marine ApplicationsSome modules are Lloyd’s Reg

NI 9237 Operating Instructions and Specifications 6 ni.comConnecting the NI 9237The NI 9237 has four RJ-50 receptacles that provide connections for fo

© National Instruments Corp. 7 NI 9237 Operating Instructions and SpecificationsWhen you connect a half bridge to the NI 9237, you must connect the AI

NI 9237 Operating Instructions and Specifications 8 ni.comThe NI 9237 has a four-terminal external excitation voltage source connector. You can use th

© National Instruments Corp. 9 NI 9237 Operating Instructions and SpecificationsFigure 2. Connecting a Half or Full Bridge to the NI 9237EX+EX–SC SCR