Related Manuals for NI PXIe-4353
Summary of Contents for NI PXIe-4353
- Page 1 NI SC Express NI PXIe-4353 User Manual NI PXIe-4353 User Manual April 2010 373033A-01...
- Page 2 Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 1800 300 800, Austria 43 662 457990-0, Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,...
- Page 3 Warranty The NI PXIe-4353 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period.
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Page 4: Table Of Contents
Measuring Temperature with the DAQ Assistant ...........2-6 Measuring Temperature with LabVIEW or LabWindows/CVI......2-7 Temperature Accuracy Considerations ............2-7 Cold-Junction Temperature Measurement Accuracy .......2-8 NI PXIe-4353 Features ....................2-8 NI PXIe-4353 Measurement Circuitry ............2-9 NI PXIe-4353 Block Diagram.................2-10 Sample Rates ....................2-11 Hardware and Software Timing ............2-11 ADC Timing Modes................2-11 Channel Ordering ................2-13... - Page 5 Data Transfer Methods ....................3-4 Appendix A Technical Support and Professional Services Figures Figure 2-1. Connecting a Shielded Thermocouple to the NI PXIe-4353 ....2-2 Figure 2-2. NI PXIe-4353 Measurement Circuitry Diagram........2-9 Figure 2-3. NI PXIe-4353 Block Diagram .............. 2-10 Figure 2-4.
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Page 6: Getting Started
Installation Refer first to the NI SC Express Installation Requirements and then to the NI SC Express 4353 Installation Guide and Terminal Block Specifications documents for step-by-step software and hardware installation instructions. -
Page 7: Using The Ni Pxie-4353
It also includes overviews of the features available on the NI PXIe-4353. Connecting Signals This section briefly explains how to connect signals to the NI PXIe-4353. It also contains shielding and grounding considerations, the module pinout, and an explanation of the signals to connect to the NI PXIe-4353. -
Page 8: Figure 2-1. Connecting A Shielded Thermocouple To The Ni Pxie-4353
If you are using a shielded thermocouple, connect the shield to the chassis ground, using the ground lugs on the terminal block. Refer to the NI SC Express 4353 Installation Guide and Terminal Block Specifications document for details about the location of these lugs. -
Page 9: Module Pinout
Chapter 2 Using the NI PXIe-4353 Module Pinout Table 2-1illustrates the pinout of the front connector on the NI PXIe-4353. Refer to the Signal Descriptions section for definitions of each signal. Refer to the NI SC Express 4353 Installation Guide and Terminal Block Specifications document for signal locations on the terminal block. -
Page 10: Front Connector Pin Assignments
Chapter 2 Using the NI PXIe-4353 Table 2-1. Front Connector Pin Assignments Front Connector Diagram Pin Number Column A Column B Column C TC0+ TC1+ TC2+ TC0– TC1– Column TC2– TC3– TC3+ TC4+ TC5+ CJC0+ TC4– TC5– CJC0– TC6– TC6+... -
Page 11: Signal Descriptions
Refer to the NI SC Express 4353 Installation Guide and Terminal Block Specifications document for details regarding the association of each CJC channel to the thermocouple input channels. -
Page 12: Measuring Temperature With Thermocouples
/CVI , or Measurement Studio. To find out more about using NI-DAQmx, refer to the NI-DAQmx Help, which is installed at Start»All Programs»National Instruments»NI-DAQ by default. Measuring Temperature with the DAQ Assistant The following procedure assumes you have already installed NI-DAQmx and Note connected the thermocouple to your device. -
Page 13: Measuring Temperature With Labview Or Labwindows/Cvi
Refer to the Temperature Measurement Accuracy section in the NI PXIe-4353 Specifications document for the accuracy of each thermocouple type when connected to the NI PXIe-4353. -
Page 14: Cold-Junction Temperature Measurement Accuracy
(OTD) circuit that is selectable on a per-module basis, which consists of a current source between the TC+ and TC– terminals. The NI PXIe-4353 is bank isolated from the PXI Express chassis and from other modules in the system. -
Page 15: Ni Pxie-4353 Measurement Circuitry
Chapter 2 Using the NI PXIe-4353 NI PXIe-4353 Measurement Circuitry Figure 2-2 shows the measurement circuitry on the NI PXIe-4353. TC Channels 10 MΩ Lowpass Instrumentation Filter Amplifier 10 MΩ TC– Open Thermocouple Detection Current Isolated with Disable Option CJC Channels 2.048 V... -
Page 16: Ni Pxie-4353 Block Diagram
Chapter 2 Using the NI PXIe-4353 NI PXIe-4353 Block Diagram Figure 2-3 shows the NI PXIe-4353 block diagram. Accessory CM Detection Multiplexers ADC0 TC28 TC30 Autozero OTD Enable PXIe Digital CM Detection Isolators Interface Multiplexers ADC1 FPGA TC29 TC31 Autozero... -
Page 17: Sample Rates
You can use software timing or hardware timing to control when a signal is acquired. With hardware timing, a digital signal, such as the sample clock on the NI PXIe-4353, controls the acquisition rate. With software timing, the acquisition rate is determined by the software and operating system instead of by the measurement device. -
Page 18: Table 2-3. Adc Timing Mode Quick Reference Chart
Refer to Table 2-3 for a quick reference about the ADC timing mode that NI-DAQmx selects based on the number of channels per ADC and the selected sample rate. Refer to the... -
Page 19: Channel Ordering
Using the NI PXIe-4353 Channel Ordering When using the thermocouple task in NI-DAQmx, the CJC channels in the task are added automatically based on the associated thermocouple input (TC) channels on the terminal block. The CJC channels are added to the end of the scanlist in the same order as the first associated TC channel in the original scanlist. -
Page 20: Computing Aggregate Sample Rates
Chapter 2 Using the NI PXIe-4353 The module samples the channels in the order NI-DAQmx requests and are dependent on the ADC to which the channel belongs. Inside the module, the requested channels in the task are divided into three ADC-dependent scanlists in order to optimize the sample rate. These scanlists are sampled in parallel. -
Page 21: Using The Autozero Channels
Using the Autozero Channels The NI PXIe-4353 has two internal autozero channels that compensate for the offset error. The first autozero channel compensates for the offset error on even thermocouple input channels (TC0, TC2, TC4 … TC30), and the second autozero channel compensates for the offset error on odd thermocouple input channels (TC1, TC3, TC5 …... -
Page 22: Cjc Channels
OTD allows you to find channels that do not have a thermocouple connected to the module. The NI PXIe-4353 has an OTD circuit per channel and has a single control to enable or disable all channels programmatically. OTD can be enabled or disabled using the Open Thermocouple Detection Enable DAQmx channel property. -
Page 23: Common-Mode Over-Range Detection
If a common-mode voltage out of range is detected, the accuracy of the data on any channel in the task may be impacted. If a thermocouple is connected to the NI PXIe-4353, but is not in the task, make sure the channel does not exceed the common-mode voltage range. A floating thermocouple, or a channel that is left unconnected, will not exceed the common-mode voltage range. -
Page 24: Pxi Express Considerations
PXI Express Considerations This chapter details the clock and trigger functionality available through the PXI Express chassis for the NI PXIe-4353. NI SC Express Clock and Trigger Signals PXIe_CLK100 PXIe_CLK100 is a common low-skew 100 MHz reference clock for synchronization of multiple modules in a PXI Express measurement or control system. -
Page 25: Pxi_Star Trigger
PXI Express system timing controller and a peripheral device. Using multiple connections enable you to create more applications because of the increased routing capabilities. NI PXIe-4353 User Manual ni.com... -
Page 26: Trigger Filters
When the filter clock has sampled the signal high on N consecutive edges, the low-to-high transition is propagated to the rest of the circuit. The value of N depends on the filter setting. Refer to Table 3-2. © National Instruments Corporation NI PXIe-4353 User Manual... -
Page 27: Data Transfer Methods
Direct Memory Access (DMA)—DMA is a method to transfer data between the device and computer memory without the involvement of the CPU. This method makes DMA the fastest available data transfer method. NI uses DMA hardware and software technology to achieve high throughput rates and increase system utilization. DMA is the default method of data transfer for PXI Express devices. -
Page 28: Technical Support And Professional Services
If you searched and could not find the answers you need, contact your local office or ni.com NI corporate headquarters. Phone numbers for our worldwide offices are listed at the front of © National Instruments Corporation NI PXIe-4353 User Manual... - Page 29 Technical Support and Professional Services this manual. You also can visit the Worldwide Offices section of ni.com/niglobal access the branch office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. NI PXIe-4353 User Manual ni.com...
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