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OPERATING INSTRUCTIONS AND S PECIFICATIONS NI 9225E 3-Channel, 300 V rm s , 24-Bit, Simultaneous, Channel-to-Channe l Isolated Analog In put Module.
NI 9225E Operating I nstructio ns and Specifica tions 2 ni.com This document describes how to use the National Instruments 9225E and includes dimensions, terminal assignments, and specifications for the NI 9225E. V isit ni.com/info and enter rdsoftwareversion to determine which software you need for the modules you are using.
© National Inst ruments Corp. 3 NI 9225E Operating In structions and Specificat ions NI 9225E Dimensions The following f igure shows the dimensions of the NI 9225E. Figure 1. NI 9225E Dimens ions in Mi llimeters (I nches) 73.4 (2.89) 0.0 (0.00) 26.7 (1.
NI 9225E Operating I nstructions and Specificati ons 4 ni.com Connecting the NI 9225E The NI 922 5E has three 2-t erminal detachab le screw-terminal connectors that provide con nections for three simultaneously sampled, isolated an alog input channels.
© National Inst ruments Corp. 5 NI 9225E Operating In structions and Specificat ions Y ou can connect ground-referenced or floating signal sources to the NI 9225E. Connect the positiv e signal of the signal source to the AI+ terminal, and con nect the negati ve signal of the signal source to the AI– terminal.
NI 9225E Operating I nstructions and Specificati ons 6 ni.com Figure 3. Connecting a Groun ded Signal Source to the NI 9225E Figure 4. Connecti ng a Floating Signal Sour ce to the NI 9225E NI 9225E Si.
© National Inst ruments Corp. 7 NI 9225E Operating In structions and Specificat ions The NI 9225E analog input channels are floating with respect to earth ground and each other . The incoming analog signal on each channel is conditioned, bu ffered , and then sampled by a 24-bit Delta-Sigma ADC.
NI 9225E Operating I nstructions and Specificati ons 8 ni.com Understanding NI 9225E Filtering The NI 9225E uses a combination of analog and digital filtering to prov ide an accurate representation of in-band signals whi le rejecting out-of-band si gnals.
© National Inst ruments Corp. 9 NI 9225E Operating In structions and Specificat ions Figure 6. T ypical Passband Response of the NI 9225E F requency/Data Rate 0.
NI 9225E Operating I nstructions and Specificati ons 10 ni.com Stopband The f ilter signif icantly attenuat es all signals abo ve the stop band frequency . The primary goal of the filter is to pre vent aliasing. Therefore, the stopband frequency sc ales precisely wi th the data rate.
© National Inst ruments Corp. 11 NI 92 25E Operating Instructions and Specifications modules must share a single master timebase source. Refer to the software help for information about conf iguring the master timebase source for the NI 9225E. V isit ni.
NI 9225E Operating I nstructions and Specificati ons 12 ni.com Sleep Mode This module supports a lo w-powe r sleep mode. Su pport for sleep mode at the system le vel depends on the chassis that the module is plugged into. Refer to the chassi s manual for information about support for sleep mode.
© National Inst ruments Corp. 13 NI 92 25E Operating Instructions and Specifications Specifications The follo wing specific ations are typical for the range – 40 to 85 °C unless otherwise noted. All v oltages are relati ve to the AI– signal on each channel unles s otherwise noted.
NI 9225E Operating I nstructions and Specificati ons 14 ni.com Data rate range ( f s ) using e xternal master timebase Minimum ................... ......... ........ 390.6 S/s Maximum ......... ............ ........... ... 51.2 kS/s Data rates 1 ( f s ) .
© National Inst ruments Corp. 15 NI 92 25E Operating Instructions and Specifications Accuracy Input noise .............. ............ ........... ... 2 mV rms Stability Gain drift .......... ............ ........... ... ±10 ppm/ °C Offset drift ...
NI 9225E Operating I nstructions and Specificati ons 16 ni.com Crosstalk (60 Hz) ......... ........... .......... –130 dB Phase match Ch-to-ch, max ............ ......... ........ 0.035°/kHz Module-to-module, max ... .......... 0.035°/kHz + 360° · f in / f M Phase linearity ( f s = 50 kS/s) .
© National Inst ruments Corp. 17 NI 92 25E Operating Instructions and Specifications T otal Harmonic Distortion (T HD) (1 kHz, –20 dB) ........... .
NI 9225E Operating I nstructions and Specificati ons 18 ni.com Physical Characteristics If you need to clean the module, wipe it with a dry towel. Screw-terminal wiring .......... ............ 16 to 28 A WG copper conductor wire with 7 mm (0.28 in.) of insulation stripped from the end T orque for screw terminals .
© National Inst ruments Corp. 19 NI 92 25E Operating Instructions and Specifications Isolation Voltages Channel-to-channel Continuous .............. ......... .......... 600 V rms , Measurement Category II, (Basic insulation) W ithstand .............
NI 9225E Operating I nstructions and Specificati ons 20 ni.com Safety Standards This product meets the requirements of the follo w ing standards of safety for electrica l equipment for measurement , c.
© National Inst ruments Corp. 21 NI 92 25E Operating Instructions and Specifications Environmental National Instruments C Series modules are in tended for indoor use only but may be used outdoors if inst alled in a suitable enclosure. Refer to the manual for the chassis you are using for more information about meetin g these specif ications.
NI 9225E Operating I nstructions and Specificati ons 22 ni.com Environmental Mana gement NI is committed to designing a nd manufacturing products in an en vironmentally responsible manner . NI recognizes that eliminating certain ha zardous substances from our products is benef icial to the en vironment and t o NI customers.
© National Inst ruments Corp. 23 NI 92 25E Operating Instructions and Specifications Calibration Y ou can obtain the calibration cert ificate and information about calibration services for th e NI 9225E at ni.com/calibration . Calibration interval ..
NI 9225E Operating I nstructions and Specificati ons 24 ni.com Where to Go for Support The National Instruments W eb site is your complete resource for technical support.
© 2008 National I nstruments Corp. All rights reserved. 372618A-01 Jul08 National Instruments, NI, n i.com, and LabVIEW are trademarks of National Instrument s Corporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments trademarks.
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