ملخص المحتوى في الصفحة رقم 1
USER GUIDE AND SPECIFICATIONS
NI USB-9215 Series
4-Channel, ±10 VDC, 16-Bit Simultaneous Sampling Analog
Input Devices
This user guide describes how to use the National Instruments USB-9215
Series and lists the specifications. In this document, the NI USB-9215/9215A
with screw terminal or backshell and NI USB-9215A with BNC are referred to
inclusively as the NI USB-9215 Series.
Introduction
The NI USB-9215 Series data acquisition devices provide a USB interface
for four channels of 16-bit
ملخص المحتوى في الصفحة رقم 2
Dimensions Figures 2 and 3 show the NI USB-9215 Series device dimensions. Hi-Speed USB Carrier NI USB-9162 140.23 mm 120.68 mm (5.521 in.) (4.751 in.) 137.82 mm 118.26 mm (5.426 in.) (4.656 in.) 88.12 mm 25.34 mm (3.469 in.) (0.998 in.) Figure 2. NI USB-9215 (Screw Terminal) in Millimeters (Inches) Hi-Speed USB Carrier NI USB-9162 140.66 mm 120.68 mm (5.538 in.) (4.751 in.) 138.30 mm 118.26 mm (5.445 in.) (4.656 in.) 88.12 mm 25.34 mm (3.469 in.) (0.998 in.) Figure 3. NI USB-9215 (BNC) in Mi
ملخص المحتوى في الصفحة رقم 3
Safety Guidelines Operate the NI USB-9215 Series only as described in these operating instructions. Note Although the NI 9215 module may have more stringent certification standards than the NI USB-9215 Series, when used with the NI USB-9161/9162 carrier, the combined system may be limited. Refer to the Specifications section of this document for more details. Hot Surface This icon denotes that the component may be hot. Touching this component may result in bodily injury. Caution Do not disc
ملخص المحتوى في الصفحة رقم 4
Related Documentation Each application software package and driver includes information about writing applications for taking measurements and controlling measurement devices. The following references to documents assume you have NI-DAQmx 8.7 or later, NI-DAQmx Base version 3.x, and where applicable, version 7.1 or later of the NI application software. NI-DAQmx for Windows The DAQ Getting Started Guide describes how to install your NI-DAQmx for Windows software, how to install your NI-DAQmx
ملخص المحتوى في الصفحة رقم 5
Use the LabVIEW Help, available by selecting Help»Search the LabVIEW Help in LabVIEW, to access information about LabVIEW programming concepts, step-by-step instructions for using LabVIEW, and reference information about LabVIEW VIs, functions, palettes, menus, and tools. Refer to the following locations on the Contents tab of the LabVIEW Help for information about NI-DAQmx: • Getting Started»Getting Started with DAQ—Includes overview information and a tutorial to learn how to take an NI-D
ملخص المحتوى في الصفحة رقم 6
this help file in Visual Studio. NET, select Measurement Studio» NI Measurement Studio Help. To create an application in Visual C++, Visual C#, or Visual Basic .NET, follow these general steps: 1. In Visual Studio .NET, select File»New»Project to launch the New Project dialog box. 2. Find the Measurement Studio folder for the language you want to create a program in. 3. Choose a project type. You add DAQ tasks as a part of this step. ANSI C without NI Application Software The NI-DAQmx Help co
ملخص المحتوى في الصفحة رقم 7
Device Documentation and Specifications NI-DAQmx includes the Device Document Browser, which contains online documentation for supported DAQ and SCXI devices, such as documents describing device pinouts, features, and operation. You can find, view, and/or print the documents for each device using the Device Document Browser at any time by inserting the CD. After installing the Device Document Browser, device documents are accessible from Start» All Programs»National Instruments»NI-DAQ»Brows
ملخص المحتوى في الصفحة رقم 8
Training Courses If you need more help getting started developing an application with NI products, NI offers training courses. To enroll in a course or obtain a detailed course outline, refer to ni.com/training. Technical Support on the Web For additional support, refer to ni.com/support or zone.ni.com. Installing the Software Software support for the NI USB-9215 Series for Windows Vista/XP/2000 is provided by NI-DAQmx or NI-DAQmx Base depending on the software you are using. Software suppor
ملخص المحتوى في الصفحة رقم 9
device, and is also accessible from Start»All Programs»National Instruments»NI-DAQ, for more information. The NI-DAQmx Base software ships with example programs you can use to get started programming with the NI USB-9215 Series. Refer to the NI-DAQmx Base Getting Started Guide that shipped with your device, and is also accessible from Start»All Programs»National Instruments» NI-DAQmx Base»Documentation, for more information. Installing the NI USB-9215 Series Device Before installing the devi
ملخص المحتوى في الصفحة رقم 10
Figure 5. Locking Module into Place Mounting the NI USB-9215 Series to a Panel Thread inserts are located in the NI USB-9215 Series for mounting it to a panel. Refer to Figure 6 for dimensions. 85.7 mm (3.37 in.) 72.2 mm (2.84 in.) Threaded Insert M3 x 0.5 8.5 mm (0.34 in.) Max Depth 76.1 mm (3.00 in.) Figure 6. NI USB-9215 Series Dimensions in Millimeters (Inches) Connecting the NI USB-9215 Series to a Computer Plug one end of the USB cable into the NI USB-9215 Series and the other end into
ملخص المحتوى في الصفحة رقم 11
LED Indicator The NI USB-9215 Series device has a green LED next to the USB connector. The LED indicator indicates device status, as listed in Table 2. 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
ملخص المحتوى في الصفحة رقم 12
Each channel of the NI USB-9215 Series has a terminal or center pin to which you can connect the positive voltage signal, AI+, and a terminal or shield to which you can connect the negative voltage signal, AI–. The NI USB-9215 with screw terminal also has a common terminal, COM, that is internally connected to the isolated ground reference of the module. Refer to Table 3 for the terminal assignments of the NI USB-9215 with screw terminal. Refer to Figure 7 for the pin assignments of the N
ملخص المحتوى في الصفحة رقم 13
AI0+ AI0– AI1+ AI1– AI2+ AI2– AI3+ AI3– Figure 7. BNC Connector Assignments Connecting Differential Voltage Signals to the NI USB-9215 Series For grounded differential signals, connect the positive voltage signal to AI+ and the negative signal to AI–. For the NI USB-9215 with screw terminal, connect the signal reference to the COM terminal. AI+ Voltage Source NI USB-9215 with AI– Screw Terminal COM Figure 8. Connecting a Grounded Differential Voltage Signal to the NI USB-9215 (NI USB-9215
ملخص المحتوى في الصفحة رقم 14
BNC has internal circuitry that keeps the voltage source within the common-mode range. AI+ Voltage Source NI USB-9215 AI– with Screw Terminal Resistor COM Figure 9. Connecting a Floating Differential Voltage Signal (NI USB-9215 with Screw Terminal Shown) Connecting Single-Ended Voltage Signals to the NI USB-9215 Series Connect the positive voltage signal to AI+. Connect the ground signal to AI–. For the NI USB-9215 with screw terminal, you must also connect the ground signal to the COM t
ملخص المحتوى في الصفحة رقم 15
Assembling the High Voltage Screw Terminal Backshell The high voltage screw terminal backshell must be installed when using hazardous voltages (>42.4 V , 60 VDC). Refer to Figure 11 while pk completing the following steps to assemble the backshell: 1. Connect the leads to the screw terminal and secure with the strain relief. 2. Finish by snapping the backshell around the connector. 1 1 Strain Relief Figure 11. High Voltage Screw Terminal Backshell Figure 12. Assembled High Voltage Screw Te
ملخص المحتوى في الصفحة رقم 16
NI USB-9215 Series Circuitry The NI USB-9215 Series channels share a common ground. The NI USB-9215 protects each channel from overvoltages. For more information about overvoltage protection, refer to the Specifications section. The signal is buffered and conditioned by the instrumentation amplifier and is then sampled by a 16-bit ADC. The channels have independent track-and-hold amplifiers that allow you to sample all four channels simultaneously. Overvoltage AI+ + Protection Isolated AD
ملخص المحتوى في الصفحة رقم 17
Specifications The following specifications are typical for the range 0 to 60 °C unless otherwise noted. All voltages are relative to COM unless otherwise noted. Input Characteristics Number of channels ............................... 4 analog input channels ADC resolution ...................................... 16 bits Type of ADC.......................................... Successive approximation register (SAR) 1 Max sampling rate NI USB-9215 Highest Channel Number In Task Maximum Sample Rate
ملخص المحتوى في الصفحة رقم 18
Conversion time Channel 0 only.................................4.4 μs Channels 0 and 1 .............................6 μs Channels 0, 1, and 2 ........................8 μs Channels 0, 1, 2, and 3 ....................10 μs Accuracy Percent of Percent of Reading Range (Offset * Error (Gain Error) Error) Calibrated max (0 to 60 °C) 0.2% 0.082% Calibrated typ (25 °C, ±5 °C) 0.02% 0.014% Uncalibrated max (0 to 60 °C) 1.05% 0.82% Uncalibrated typ (25 °C, ±5 °C) 0.6% 0.38% * Range equals 10.4 V. Stab
ملخص المحتوى في الصفحة رقم 19
Settling time (to 2 LSBs) With screw terminal 10 V step.................................. 10 μs 20 V step.................................. 15 μs With BNC 10 V step.................................. 25 μs 20 V step.................................. 35 μs No missing codes ................................... 15 bits guaranteed DNL ....................................................... –1.9 to 2 LSB max INL......................................................... ±6 LSB max Power Requirements Powe
ملخص المحتوى في الصفحة رقم 20
Safety If you need to clean the module, wipe it with a dry towel. Safety Voltages NI USB-9215 with Screw Terminal Safety Voltages Connect only voltages that are within these limits. Channel-to-COM ....................................±30 V max Isolation Channel-to-channel..........................No isolation between channels Channel-to-earth ground Withstand .................................2,300 V , 5 seconds max rms Continuous ...............................250 V , rms Measurement Category II
