24-Bit, 102.4 kS/s, 8 and 4-Channel Dynamic Signal Acquisition NI 4472 Series, NI PCI-4474 Operating Systems • 24-bit resolution • 110 dB dynamic range • 102.4 kS/s maximum sampling rate • 45 kHz alias-free bandwidth • ±10 V range • AC/DC coupling • IEPE conditioning – software configurable • Multiple-device synchronization • Windows 2000/NT/XP • LabVIEW Real-Time • Mac OS X Recommended Software • LabVIEW • LabVIEW Sound and Vibration Analysis Toolkit • LabVIEW Order Analysis Toolkit • LabWindows/CVI • Measurement Studio Measurement Services Software (included) • NI-DAQmx Device NI 4472 NI 4472B NI 4474 Bus PCI, PXI PXI PCI Analog Inputs 8 8 4 Resolution 24 bits 24 bits 24 bits Sampling Rate 102.4 kS/s 102.4 kS/S 102.4 kS/S Input AC Cutoff Range Triggering Frequency ±10 V Analog and digital 3.4 Hz ±10 V Analog and digital 0.5 Hz ±10 V Analog and digital 3.4 Hz Table 1. NI 447x Channel, Speed, and Resolution Specifications Overview The National Instruments PCI-4472 and PXI-4472 are 8-channel dynamic signal acquisition devices for making high-accuracy audiofrequency measurements. The NI PCI-4474 is a similar 4-channel board. The vibration-optimized PXI-4472B offers a lower AC cutoff frequency of 0.5 Hz. Input channels incorporate Integrated Electronic Piezoelectric (IEPE) signal conditioning for accelerometers and microphones. The input channels of an NI 447x simultaneously digitize input signals over a bandwidth from DC to 45 kHz. You can synchronize multiple NI 447x devices for highchannel-count applications, or with other modules using the PXI star trigger bus or the RTSI bus on PCI. When used with the Sound and Vibration Toolkit or other software analysis tools, an NI 447x can obtain a variety of accurate time and frequency measurements for your application. dynamic range greater than 110 dB can be Applications Noise and vibration diagnostics achieved. Using state-of-the-art delta-sigma Audio test and measurement modulating ADCs, the NI 447x devices Machine condition monitoring Sound power achieve low noise and low distortion. Telecommunications testing Because these ADCs use a 1-bit quantizer Structural vibration Pass-by noise oversampled at a multiple of the specified sampling rate, they produce extraordinary linearity. Extremely flat, linear-phase, lowpass digital filters then remove aliases and shape the quantization noise from the band of interest. Using the delta-sigma modulating ADCs, an NI 447x is immune to the DNL distortion associated with conventional data acquisition devices. >110 dB (24-bit) Hardware Analog Inputs Figure 1. The 24-bit architecture of the NI 447x devices deliver more than 110 dB dynamic NI 447x devices have four or eight analog inputs with 24-bit resolution ADCs that are simultaneously sampled at a softwareprogrammable rate. The high resolution provides the necessary accuracy to make NI 447x devices well suited for audio and vibration analysis applications. Outstanding measurements can be achieved with an NI 447x. For example, when sampling at 51.2 kS/s and using a 16 k FFT, a range and a significantly lower noise floor than 12, 16, and comparable 24-bit products. Antialiasing The analog inputs have both analog and real-time digital filters implemented in hardware to prevent aliasing. Input signals are first passed through fixed analog filters to remove any signals with frequency components beyond the range of the ADCs; then digital 24-Bit, 102.4 kS/s, 8 and 4-Channel Dynamic Signal Acquisition reference is used for internal calibration to ensure stable, accurate DC specifications. NIST-traceable and ISO-9002-certified calibration certificates are available online. PXI/PCI Interface NI 447x devices use the PCI mini-MITE to deliver full DMA busmaster data transfer rates of 20 to 30 MB/s and burst rates up to 132 MB/s. A 1,024-sample, analog input FIFO prevents data loss if DMA or interrupt service latency is long. Figure 2. In an 18-slot PXI chassis with 14 PXI-4472 modules, you can have up to 112 simultaneously sampled analog inputs. antialiasing filters automatically adjust their cutoff frequency to remove any frequency components above half the programmed sampling rate. This advanced analog input design frees you from adding additional external filters to prevent aliasing. Multidevice Synchronization For applications requiring high channel counts, you can synchronize the operation of two or more NI 447x devices. Using the PXI star trigger bus, you can send and receive timing signals between PXI-447x modules. Synchronization is achieved by sharing a digital trigger from one device and synchronizing all devices to the same clock. The PXI star trigger bus, as defined by the PXI Specification, ensures synchronization between modules with less than 1 ns of skew, which enables a system to have 0.1 deg phase mismatch for a 1 kHz signal between any two channels across devices in the same chassis. Low phase mismatch is critical in obtaining phase information from cross-channel measurements in many applications. In the 18-slot PXI-1045 chassis, you can synchronize up to 14 PXI-4472 modules to have up to 112 simultaneously sampled analog inputs. Using the RTSI bus, two or more PCI-4472 or PCI-4474 boards can be synchronized as well. Triggering NI 447x devices have two trigger modes for acquiring signals. Pretrigger mode digitizes signals before and after a trigger condition occurs. Posttrigger mode digitizes signals after a trigger condition occurs. The source of the trigger can come from any analog input channel, the external digital trigger input, the PXI trigger bus or RTSI bus, or through software. The external digital trigger is 5 V TTL/CMOS-compatible and is activated by a choice of rising or falling edge. Triggering is needed in applications such as those that acquire transient signals. For example, when measuring transient vibrations resulting from striking a mechanical structure with a hammer, acquisition of accelerometer signals is triggered by hammer impact. Calibration Measurement Services Software NI 447x devices use NI-DAQmx as the hardware and operating system interface. You can build automated test systems or integrate an NI 447x with other hardware, including multifunction DAQ products, through NI-DAQ function calls for LabVIEW, LabWindows/CVI, and Measurement Studio. Because of bandwidth, NI 447x devices are well suited for applications in audio and vibration analysis. These applications are specifically addressed in the Sound and Vibration Toolkit and the Order Analysis Toolkit for LabVIEW. Using these toolkits in conjunction with NI 447x devices, you can produce power spectra, frequency responses, fractional-octave analysis, sound-level measurements, order spectra, order maps, and order extraction. A typical setup for an environmental noise and vibration measurement application would use one or more PXI-4472 modules, a PXI chassis and controller, LabVIEW, and the Sound and Vibration Toolkit. Ordering Information NI PCI-4472 ..................................................................778348-01 NI PCI-4472 with Sound and Vibration Toolkit ........778663-01 NI PCI-4474 ..................................................................778729-01 NI PCI-4474 with Sound and Vibration Toolkit ........778778-01 NI PXI-4472 ..................................................................778279-01 NI PXI-4472 with Sound and Vibration Toolkit ........778664-01 NI PXI-4472B ................................................................778279-02 NI PXI-4472B with Sound and Vibration Toolkit ......778664-02 Includes NI-DAQ software. Accessories SMB100, SMB female to BNC female Qty 1 ..........................................................................763389-01 Qty 8 ..........................................................................778415-01 SMB110, SMB female to BNC male Qty 1 ..........................................................................763405-01 Qty 8 ..........................................................................778414-01 BUY ONLINE! For complete product specifications, pricing, and accessory information, call (800) 813-3693 (U.S. only) or go to ni.com/modularinstruments The offset voltage and gain accuracy of the analog input are calibrated by National Instruments. An onboard precision voltage 2 National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • [email protected] • ni.com 24-Bit, 8-Channel Dynamic Signal Acquisition Specifications Typical for 25 °C unless otherwise noted. Analog Input Signal Conditioning Constant current source (software-controlled) Current.............................................................. Compliance....................................................... Output impedance ............................................ Current noise .................................................... Channel Characteristics Number of channels NI 4472 Series........................................... NI 4474 Series........................................... Input configuration ........................................... Resolution......................................................... Type of ADC...................................................... Oversampling, for sample rate (ƒs): 1.0 kS/s ≤ ƒs ≤ 51.2 kS/s.......................... 51.2 kS/s < ƒs ≤ 102.4 kS/s ...................... Sample rates (ƒs).............................................. Frequency accuracy .......................................... Input signal range ............................................ FIFO buffer size................................................. Data transfers .................................................. 8, simultaneously sampled 4, simultaneously sampled Unbalanced differential 24 bits, nominal Delta-sigma Triggers Analog Trigger 128 ƒs 64 ƒs 1.0 to 102.4 kS/s in 190.7 µS/s increments for ƒs > 51.2 kS/s or 95.36 µS/s increments for ƒs ≤ 51.2 kS/s ±25 ppm ±10 V peak 1,024 samples DMA Transfer Characteristics Offset (residual DC).......................................... ±3 mV, max Gain (amplitude accuracy)................................ ±0.1 dB, max, ƒin = 1 kHz Source............................................................... Level ................................................................. Slope................................................................. Resolution......................................................... Hysteresis......................................................... CH<0..7> -10 to +10 V, full scale, programmable Positive or negative (software selectable) 24 bits, nominal Programmable Digital Trigger Compatibility .................................................... 5 V TTL/CMOS Response .......................................................... Rising or falling edge Pulse width....................................................... 10 ns, minimum Bus Interface Type .................................................................. Master, slave Amplifier Characteristics Input impedance (ground referenced) Positive input.................................................... Negative input (shield)..................................... Flatness (relative to 1 kHz)............................... -3 dB bandwidth............................................... Input coupling................................................... AC -3 dB cutoff frequency NI 4472, NI 4474 ....................................... NI 4472B .................................................... Overvoltage protection Positive input ............................................. Positive inputs protected........................... Negative input (shield) .............................. Common mode rejection ratio (CMRR) ƒin < 1 kHz.................................................. 4 mA, ±5% 24 V >250 kΩ at 1 kHz <500 pA/√Hz Power Requirements 1 MΩ in parallel with 60 pF 50 Ω in parallel with 0.02 µF ±0.1 dB, DC to 0.4535 ƒs, max, DC-coupled 0.4863 ƒs AC or DC, software-selectable 3.4 Hz 0.5 Hz ±42.4 V CH<0..7> Not protected, rated at ±2.5 V >60 dB, minimum +3.3 VDC PXI.............................................................. +5 VDC PCI.............................................................. PXI.............................................................. +12 VDC............................................................ -12 VDC ............................................................ 400 mA, maximum 2.6 A, maximum 2.2 A, maximum 120 mA, maximum 120 mA, maximum Physical Dimensions (not including connectors) PCI.............................................................. PXI.............................................................. Analog I/O connectors ..................................... Digital trigger connector .................................. 17.5 by 10.7 cm (6.9 by 4.2 in.) 16.0 by 9.9 cm (6.3 by 3.9 in.) (1 slot) SMB male SMB male Dynamic Characteristics Maximum Working Voltage Alias-free bandwidth (passband)..................... DC (0 Hz) to 0.4535 ƒs Stop band ......................................................... 0.5465 ƒs Alias rejection .................................................. 110 dB Spurious-free dynamic range........................... 130 dB, 1.0 kS/s ≤ ƒs ≤ 51.2 kS/s, 118 dB, 51.2 kS/s < ƒs ≤ 102.4 kS/s THD, ƒin = 1kHz 0 dBFS input .............................................. <-90 dB 20 dBFS input ............................................ <-100 dB 60 dBFS input ............................................ <-60 dB IMD................................................................... <-100 dB (CCIF 14 kHz + 15 kHz) Crosstalk1 (channel separation), ƒin = 0 to 51.2 kHz Between channels 0 and 1, 2 and 3, 4 and 5, or 6 and 7 Shorted input ...................................... <-90 dB 1 kΩ load............................................ <-80 dB Other channel combinations Shorted input ...................................... <-100 dB 1 kΩ load............................................ <-90 dB Phase linearity.................................................. <±0.5 deg Interchannel phase mismatch.......................... <ƒin (in kHz) x 0.018 deg + 0.082 deg Interchannel gain mismatch............................. ±0.1 dB Filter delay through ADC.................................. 38.8 sample periods Maximum working voltage refers to the signal voltage plus the common-mode voltage. Channel-to-earth .............................................. 10 V, installation category I Channel-to-channel .......................................... 10 V, installation category I Onboard Calibration Reference DC level ............................................................ 5.000 V ±2.5 mV Temperature coefficient ................................... ±5 ppm/°C maximum Long-term stability ........................................... ±20 ppm/√1,000 h Environmental Operating temperature..................................... Storage temperature ........................................ Relative humidity ............................................. Maximum altitude ............................................ Pollution degree (indoor use only) ................... 0 to 50 °C -20 to 70 °C 10 to 90%, noncondensing 2,000 m 2 Calibration Internal – On software command; computes gain and offset corrections Interval....................................................... Whenever temperature is different from temperature at last internal calibration by more than ±5 °C External – Internal voltage reference read and stored in nonvolatile memory Interval....................................................... 1 year Warm-up time .................................................. 15 minutes Certifications and Compliances CE Mark Compliance 1Measured with full-scale (±10 V) input. National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • [email protected] • ni.com 3 NI Services and Support NI has the services and support to meet your needs around the globe and through the application life cycle – from planning and development through deployment and ongoing maintenance. We offer services and service levels to meet customer requirements in research, design, validation, and manufacturing. Visit ni.com/services. Local Sales and Technical Support SERVICE NEEDS In offices worldwide, our staff is local to the country, giving you access to engineers who speak your language. NI delivers industryleading technical support through online knowledge bases, our applications engineers, and access to 14,000 measurement and automation professionals within NI Developer Exchange forums. Find immediate answers to your questions at ni.com/support. We also offer service programs that provide automatic upgrades to your application development environment and higher levels of technical support. Visit ni.com/ssp. Training and Certification NI training is the fastest, most certain route to productivity with our products. NI training can shorten your learning curve, save development time, and reduce maintenance costs over the application life cycle. We schedule instructor-led courses in cities worldwide, or we can hold a course at your facility. We also offer a professional certification program that identifies individuals who have high levels of skill and knowledge on using NI products. Visit ni.com/training. Hardware Services NI Factory Installation Services NI Factory Installation Services (FIS) is the fastest and easiest way to use your PXI or PXI/SCXI combination systems right out of the box. Trained NI technicians install the software and hardware and configure the system to your specifications. NI extends the standard warranty by one year on hardware components (controllers, chassis, modules) purchased with FIS. To use FIS, simply configure your system online with ni.com/pxiadvisor. Professional Services Our Professional Services Team is comprised of NI applications engineers, NI Consulting Services, and a worldwide NI Alliance Partner Program of more than 600 independent consultants and integrators. Services range from start-up assistance to turnkey system integration. Visit ni.com/alliance. Calibration Services NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. We provide manual calibration procedures, services to recalibrate your products, and automated calibration software specifically designed for use by metrology laboratories. Visit ni.com/calibration. Repair and Extended Warranty OEM Support We offer design-in consulting and product integration assistance if you want to use our products for OEM applications. For information about special pricing and services for OEM customers, visit ni.com/oem. NI provides complete repair services for our products. Express repair and advance replacement services are also available. We offer extended warranties to help you meet project life-cycle requirements. Visit ni.com/services. ni.com • (800) 433-3488 National Instruments • Tel: (512) 683-0100 • Fax: (512) 683-9300 • [email protected] © 2004 National Instruments Corporation. All rights reserved. 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