Baixe Instrumentação manual usb e outras Manuais, Projetos, Pesquisas em PDF para Engenharia Mecânica, somente na Docsity! USER GUIDE AND SPECIFICATIONS NI USB-6008/6009 This guide describes how to use the National Instruments USB-6008/6009 data acquisition (DAQ) devices and lists specifications. Introduction The NI USB-6008/6009 provides connection to eight analog input (AI) channels, two analog output (AO) channels, 12 digital input/output (DIO) channels, and a 32-bit counter with a full-speed USB interface. Note This manual revision updates naming conventions to reflect the conventions used in NI-DAQmx. Table 1 notes the correlation between the old and updated names. Table 1. Digital Output Driver Type Naming Conventions Hardware Functionality NI-DAQmx Terminology Open-drain Open collector Push-pull Active drive NI USB-6008/6009 User Guide and Specifications 2 ni.com Figure 1. NI USB-6008/6009 Figure 2. NI USB-6008/6009 Back View Table 2. Differences Between the NI USB-6008 and NI USB-6009 Feature NI USB-6008 NI USB-6009 AI Resolution 12 bits differential, 11 bits single-ended 14 bits differential, 13 bits single-ended Maximum AI Sample Rate, Single Channel* 10 kS/s 48 kS/s Maximum AI Sample Rate, Multiple Channels (Aggregate)* 10 kS/s 48 kS/s DIO Configuration Open collector Open collector or active drive * System dependent. 1 USB Cable Strain Relief NI USB-6009 8 Inputs, 14-bit, Multifunction I/O 32 D ig it al 17 1 A n alo g 16 1 © National Instruments Corporation 5 NI USB-6008/6009 User Guide and Specifications Software Software support for the NI USB-6008/6009 for Windows 2000/XP/Vista is provided by NI-DAQmx. The NI-DAQmx CD contains example programs that you can use to get started programming with the NI USB-6008/6009. Refer to the NI-DAQmx for USB Devices Getting Started Guide, that shipped with your device and is also accessible from Start»All Programs»National Instruments» NI-DAQ for more information. Note For information about non-Windows operating system support, refer to ni.com/info and enter rddqld. LabVIEW SignalExpress for DAQ The NI-DAQmx CD includes LabVIEW SignalExpress for DAQ which is an interactive, measurement software tool for quickly acquiring, analyzing, and presenting data with no programming required. The application is available at Start»All Programs»National Instruments»NI DAQ» LabVIEW SignalExpress. NI USB-6008/6009 User Guide and Specifications 6 ni.com Hardware The following block diagram shows key functional components of the NI USB-6008/6009. Figure 3. Device Block Diagram P1.<0..3> P0.<0..7> D ig ita l I /O T er m in al B lo ck AI <0..7> AO 0 AO 1 A na lo g I/O T er m in al B lo ck +2.5 V/CAL +5 V/200 mA 8 Channel 12/14b ADC 12b DAC 12b DAC USB Microcontroller S P I External Power Supply Vbus F ul l-S pe ed U S B In te rf ac e USB PFI 0 © National Instruments Corporation 7 NI USB-6008/6009 User Guide and Specifications Setting Up Hardware Complete the following steps to set up the hardware: 1. Install combicon screw terminal blocks by inserting them into the combicon jacks. 2. Figure 4 illustrates the signal labels that ship in the NI USB-6008/6009 kit. You can apply the signal labels to the screw terminal blocks for easy signal identification. Figure 4. NI USB-6008/6009 Signal Labels 3. Refer to Table 3 and Figures 4 and 5 for signal label orientation and affix the provided signal labels to the screw terminal blocks. Until the signal labels are applied, you can insert the screw terminal blocks into either of the combicon jacks. 1 Terminal Number Labels (Use Both Together) 2 Digital I/O Label 3 Single-Ended Label (Use Either) 4 Differential Label (Use Either) ANALOG DIGITAL 3 1 4 2 NI USB-6008/6009 User Guide and Specifications 10 ni.com Table 4. Digital Terminal Assignments Module Terminal Signal 17 P0.0 18 P0.1 19 P0.2 20 P0.3 21 P0.4 22 P0.5 23 P0 6 24 P0.7 25 P1.0 26 P1.1 27 P1.2 28 P1.3 29 PFI 0 30 +2.5 V 31 +5 V 32 GND 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 © National Instruments Corporation 11 NI USB-6008/6009 User Guide and Specifications Signal Descriptions Table 5 describes the signals available on the I/O connectors. Table 5. Signal Descriptions Signal Name Reference Direction Description GND — — Ground—The reference point for the single-ended AI measurements, bias current return point for differential mode measurements, AO voltages, digital signals at the I/O connector, +5 VDC supply, and the +2.5 VDC reference. AI <0..7> Varies Input Analog Input Channels 0 to 7—For single-ended measurements, each signal is an analog input voltage channel. For differential measurements, AI 0 and AI 4 are the positive and negative inputs of differential analog input channel 0. The following signal pairs also form differential input channels: <AI 1, AI 5>, <AI 2, AI 6>, and <AI 3, AI 7>. AO 0 GND Output Analog Channel 0 Output—Supplies the voltage output of AO channel 0. AO 1 GND Output Analog Channel 1 Output—Supplies the voltage output of AO channel 1. P1.<0..3> P0.<0..7> GND Input or Output Digital I/O Signals—You can individually configure each signal as an input or output. +2.5 V GND Output +2.5 V External Reference—Provides a reference for wrap-back testing. +5 V GND Output +5 V Power Source—Provides +5 V power up to 200 mA. PFI 0 GND Input PFI 0—This pin is configurable as either a digital trigger or an event counter input. NI USB-6008/6009 User Guide and Specifications 12 ni.com LED The NI USB-6008/6009 device has a green LED next to the USB connector. When the device is connected to a USB port, the LED blinks steadily to indicate that the device is initialized and is receiving power from the connection. If the LED is not blinking, it may mean that the device is not initialized or the computer is in standby mode. In order for the device to be recognized, the device must be connected to a computer that has NI-DAQmx installed on it. If your device is not blinking, make sure your computer has the latest version of NI-DAQmx installed on it, and the computer is not in standby mode. Analog Input You can connect analog input signals to the NI USB-6008/6009 through the I/O connector. Refer to Table 5 for more information about connecting analog input signals. Analog Input Circuitry Figure 6 illustrates the analog input circuitry of the NI USB-6008/6009. Figure 6. Analog Input Circuitry MUX The NI USB 6008/6009 has one analog-to-digital converter (ADC). The multiplexer (MUX) routes one AI channel at a time to the PGA. AI +2.5 VREF 39.2 kΩ 127 kΩ 30.9 kΩ PGA Input Range Selection AI FIFOADCMUX © National Instruments Corporation 15 NI USB-6008/6009 User Guide and Specifications Connecting Reference Single-Ended Voltage Signals To connect reference single-ended voltage signals (RSE) to the NI USB-6008/6009, connect the positive voltage signal to the desired AI terminal, and the ground signal to a GND terminal. When no signals are connected to the analog input terminal, the internal resistor divider may cause the terminal to float to approximately 1.4 V when the analog input terminal is configured as RSE. This behavior is normal and does not affect the measurement when a signal is connected. Figure 10. Connecting a Reference Single-Ended Voltage Signal Digital Trigger When an AI task is defined, you can configure PFI 0 as a digital trigger input. When the digital trigger is enabled, the AI task waits for a rising or falling edge on PFI 0 before starting the acquisition. To use ai/Start Trigger with a digital source, specify PFI 0 as the source and select rising or falling edge. AI Voltage Source NI USB-6008/6009 GND NI USB-6008/6009 User Guide and Specifications 16 ni.com Analog Output The NI USB-6008/6009 has two independent AO channels that can generate outputs from 0–5 V. All updates of AO lines are software-timed. Analog Output Circuitry Figure 11 illustrates the analog output circuitry for the NI USB-6008/6009. Figure 11. Analog Output Circuitry DACs Digital-to-analog converts (DACs) convert digital codes to analog voltages. Connecting Analog Output Loads To connect loads to the NI USB-6008/6009, connect the positive lead of the load to the AO terminal, and connect the ground of the load to a GND terminal. Figure 12. Connecting a Load REF(+) REF(–) 12-Bit DAC Output Buffer 50 Ω AO +5 V GND AI Voltage Source NI USB-6008/6009 GND © National Instruments Corporation 17 NI USB-6008/6009 User Guide and Specifications Minimizing Glitches on the Output Signal When you use a DAC to generate a waveform, you may observe glitches in the output signal. These glitches are normal; when a DAQ switches from one voltage to another, it produces glitches due to released charges. The largest glitches occur when the most significant bit of the DAC code changes. You can build a lowpass deglitching filter to remove some of these glitches, depending on the frequency and nature of the output signal. Refer to ni.com/support for more information about minimizing glitches. Digital I/O The NI USB-6008/6009 has 12 digital lines, P0.<0..7> and P1.<0..3>, which comprise the DIO port. GND is the ground-reference signal for the DIO port. You can individually program all lines as inputs or outputs. Digital I/O Circuitry Figure 13 shows P0.<0..7> connected to example signals configured as digital inputs and digital outputs. You can configure P1.<0..3> similarly. Figure 13. Example of Connecting a Load 1 P0.0 configured as an open collector digital output driving a LED 2 P0.2 configured as a active drive digital output driving a LED 3 P0.4 configured as a digital input receiving a TTL signal from a gated invertor 4 P0.7 configured as a digital input receiving a 0 V or 5 V signal from a switch +5 V LED Switch I/O Connector GND P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 +5 V LED 1 2 3 4 TTL Signal NI USB-6008/6009 User Guide and Specifications 20 ni.com Reference and Power Sources The NI USB-6008/6009 creates an external reference and supplies a power source. All voltages are relative to COM unless otherwise noted. +2.5 External References The NI USB-6008/6009 creates a high-purity reference voltage supply for the ADC using a multi-state regulator, amplifier, and filter circuit. The resulting +2.5 V reference voltage can be used as a signal for self test. +5 V Power Source The NI USB-6008/6009 supplies a 5 V, 200 mA output. This source can be used to power external components. Note While the device is in USB suspend, the output is disabled. Specifications The following specifications are typical at 25 °C, unless otherwise noted. Analog Input Converter type ........................................Successive approximation Analog inputs..........................................8 single-ended, 4 differential, software selectable Input resolution NI USB-6008...................................12 bits differential, 11 bits single-ended NI USB-6009...................................14 bits differential, 13 bits single-ended Max sampling rate1 NI USB-6008...................................10 kS/s NI USB-6009...................................48 kS/s AI FIFO ..................................................512 bytes Timing resolution ...................................41.67 ns (24 MHz timebase) 1 System dependent. © National Instruments Corporation 21 NI USB-6008/6009 User Guide and Specifications Timing accuracy..................................... 100 ppm of actual sample rate Input range Single-ended ................................... ±10 V Differential ...................................... ±20 V1, ±10 V, ±5 V, ±4 V, ±2.5 V, ±2 V, ±1.25 V, ±1 V Working voltage..................................... ±10 V Input impedance..................................... 144 kΩ Overvoltage protection........................... ±35 Trigger source ........................................ Software or external digital trigger System noise2 Single-ended ±10 V range ............................. 5 mVrms Differential ±20 V range ............................. 5 mVrms ±1 V range ............................... 0.5 mVrms Absolute accuracy at full scale, single ended Absolute accuracy at full scale, differential3 1 ±20 V means that |AI+ – (AI–)| <= 20V. However, AI+ and AI– must both be within ±10V of GND. Refer to the Connecting Differential Voltage Signals for more information. 2 System noise measured at maximum sample rate. Range Typical at 25 °C (mV) Maximum over Temperature (mV) ±10 14.7 138 3 Input voltages may not exceed the working voltage range. Range Typical at 25 °C (mV) Maximum over Temperature (mV) ±20 14.7 138 ±10 7.73 84.8 ±5 4.28 58.4 ±4 3.59 53.1 ±2.5 2.56 45.1 NI USB-6008/6009 User Guide and Specifications 22 ni.com Analog Output Analog outputs........................................2 Output resolution ....................................12 bits Maximum update rate .............................150 Hz, software-timed Output range ...........................................0 to +5 V Output impedance...................................50 Ω Output current drive................................5 mA Power-on state ........................................0 V Slew rate .................................................1 V/μs Short circuit current ................................50 mA Absolute accuracy (no load) ...................7 mV typical, 36.4 mV maximum at full scale Digital I/O Digital I/O P0.<0..7> .........................................8 lines P1.<0..3> .........................................4 lines Direction control.....................................Each channel individually programmable as input or output Output driver type NI USB-6008...................................Open collector (open-drain) NI USB-6009...................................Each channel individually programmable as active drive (push-pull) or open collector (open-drain) ±2 2.21 42.5 ±1.25 1.70 38.9 ±1 1.53 37.5 Range Typical at 25 °C (mV) Maximum over Temperature (mV) © National Instruments Corporation 25 NI USB-6008/6009 User Guide and Specifications Safety Standards The NI USB-6008/6009 is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: • IEC 61010-1, EN 61010-1 • UL 61010-1, CSA 61010-1 Note For UL and other safety certifications, refer to the product label, or visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column. Voltages Connect only voltages that are within these limits. Channel-to-GND .................................... ±30 V max, Measurement Category I Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics. Caution Do not use this module for connection to signals or for measurements within Measurement Categories II, III, or IV. Hazardous Locations The NI USB-6008/6009 are not certified for use in hazardous locations. Environmental The NI USB-6008/6009 device is intended for indoor use only. Operating temperature (IEC 60068-2-1 and IEC 60068-2-2) ..... 0 to 55 °C Operating humidity (IEC 60068-2-56) ................................... 5 to 95% RH, noncondensing Maximum altitude .................................. 2,000 m (at 25 °C ambient temperature) NI USB-6008/6009 User Guide and Specifications 26 ni.com Storage temperature (IEC 60068-2-1 and IEC 60068-2-2)......–40 to 85 °C Storage humidity (IEC 60068-2-56) ..................................5 to 90% RH, noncondensing Pollution Degree (IEC 60664) ................2 Electromagnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement, control, and laboratory use: • EN 61326 EMC requirements; Minimum Immunity • EN 55011 Emissions; Group 1, Class A • CE, C-Tick, ICES, and FCC Part 15 Emissions; Class A Note The NI USB-6008/6009 may experience temporary variations in analog input readings when exposed to radiated and conducted RF noise. The device returns to normal operation after RF exposure is removed. Note For EMC compliance, operate this device according to product documentation. CE Compliance This product meets the essential requirements of applicable European Directives, as amended for CE marking, as follows: • 73/23/EEC; Low-Voltage Directive (safety) • 89/336/EEC; Electromagnetic Compatibility Directive (EMC) Note Refer to the Declaration of Conformity (DoC) for this product for any additional regulatory compliance information. To obtain the DoC for this product, visit ni.com/ certification, search by model number or product line, and click the appropriate link in the Certification column. Waste Electrical and Electronic Equipment (WEEE) EU Customers At the end of their life cycle, all products must be sent to a WEEE recycling center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit ni.com/environment/weee.htm. 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