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Summary of Contents for National Instruments SC Express Series
- Page 1 SC Express NI PXIe-4300 User Manual 8 Ch, 250 kS/s, 300 V Ch-Ch Isolated Analog Input Module NI PXIe-4300 User Manual July 2015 373024B-01...
- Page 2 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 For further support information, refer to the NI Services appendix. To comment on National Instruments documentation, refer to the National Instruments website at ni.com/info enter the Info Code feedback...
- Page 3 National Instruments Corporation. National Instruments respects the intellectual property of others, and we ask our users to do the same. NI software is protected by copyright and other intellectual property laws. Where NI software may be used to reproduce software or other materials belonging to others, you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction.
- Page 4 ™ The ExpressCard word mark and logos are owned by PCMCIA and any use of such marks by National Instruments is under license. The mark LabWindows is used under a license from Microsoft Corporation. Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
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Page 5: Table Of Contents
External Reference Clock..................2-17 10 MHz Reference Clock ................. 2-18 Synchronizing Multiple Devices ................2-18 Triggering ......................... 2-19 Analog Triggering .................... 2-19 Digital Input Triggering..................2-22 TB-4300/B/C Accessory................... 2-22 Accessory Auto-Detection................2-23 Isolation ......................2-23 © National Instruments | v... - Page 6 Contents Chapter 3 SC Express Considerations SC Express Clock and Trigger Signals................3-1 PXIe_CLK100 ......................3-1 PXIe_SYNC100......................3-1 PXI_CLK10 ......................3-1 PXI Triggers ......................3-1 PXI_STAR Trigger....................3-2 PXI_STAR Filters..................... 3-2 PXIe_DSTAR<A..C> ....................3-2 Data Transfer Methods ..................... 3-3 Appendix A NI Services Figures Figure 2-1.
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Page 7: Getting Started
NI recommends that you self-calibrate the NI PXIe-4300 module after installation and whenever the ambient temperature changes. Self-calibration should be performed after the module has warmed up for the recommended time period. Refer to the NI PXIe-4300 Device Specifications for the module warm-up time and self-calibration conditions. © National Instruments | 1-1... - Page 8 Chapter 1 Getting Started You can initiate self-calibration using Measurement & Automation Explorer (MAX), by completing the following steps. Launch MAX. Select My System»Devices and Interfaces»your module. Initiate self-calibration using one of the following methods: • Click Self-Calibrate in the upper right corner of MAX. •...
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Page 9: Using The Ni Pxie-4300
COM connection should be made as close to the source as possible to take advantage of the differential nature of this device. Refer to the NI PXIe-4300 and TB-4300/B/C User Guide and Terminal Block Specifications for details about signal terminal locations. © National Instruments | 2-1... -
Page 10: Device Pinout
Chapter 2 Using the NI PXIe-4300 Device Pinout Table 2-1 shows the pinout of the front connector of the NI PXIe-4300. Refer to the Connector Signal Description section for definitions of each signal. Refer to the NI PXIe-4300 and TB-4300/B/C User Guide and Terminal Block Specifications for signal locations on the terminal block. -
Page 11: Table 2-1. Front Signal Pin Assignments
COM 7 — PFI 0 PFI 1 — — — — — — — — — Channel — — — — is no connection, RSVD COM 7 RSVD isolation barrier, RSVD is reserved RSVD RSVD RSVD © National Instruments | 2-3... -
Page 12: I/O Connector Signal Description
Chapter 2 Using the NI PXIe-4300 I/O Connector Signal Description Table 2-2 describes the signals found on the I/O connectors. Table 2-2. I/O Connector Signal Descriptions Signal Names Reference Direction Description — — Analog Input Isolated Common <0..7> Ground—These terminals are the reference point for differential analog input measurements. -
Page 13: Figure 2-2. Ni Pxie-4300 Block Diagram
AI CH 6 M-CAL Selectable AI6+ PGIA Filter AI6– Power Channel Power AI CH 7 M-CAL Selectable AI7+ PGIA Filter AI7– Power Channel Power Terminal Block Power Terminal Block Communication Isolated Non-Isolated 300 V Isolation © National Instruments | 2-5... -
Page 14: Signal Acquisition Considerations
Chapter 2 Using the NI PXIe-4300 Signal Acquisition Considerations This section contains information about signal acquisition concepts including timing, triggering, and synchronization. Input Ranges Input range refers to the set of input voltages that an analog input channel can digitize with the specified accuracy. -
Page 15: Adc
Finite sample mode acquisition refers to the acquisition of a specific, predetermined number of data samples. Once the specified number of samples has been read in, the acquisition stops. If you use a reference trigger, you must use finite sample mode. © National Instruments | 2-7... -
Page 16: Analog Input Filter
Chapter 2 Using the NI PXIe-4300 – Continuous acquisition refers to the acquisition of an unspecified number of samples. Instead of acquiring a set number of data samples and stopping, a continuous acquisition continues until you stop the operation. Continuous acquisition is also referred to as double-buffered or circular-buffered acquisition. -
Page 17: Analog Input Timing Signals
The value decrements with each pulse on AI Sample Clock, until the value reaches zero. The sample counter is then loaded with the number of posttrigger samples, in this example, three. © National Instruments | 2-9... -
Page 18: Aggregate Versus Single Channel Sample Rates
Chapter 2 Using the NI PXIe-4300 Figure 2-5. Typical Pretriggered DAQ Sequence AI Start Trigger Don't Care AI Reference Trigger AI Sample Clock Sample Counter If an AI Reference Trigger (ai/ReferenceTrigger) pulse occurs before the specified number of pretrigger samples are acquired, the trigger pulse is ignored. Otherwise, when the AI Reference Trigger pulse occurs, the sample counter value decrements until the specified number of posttrigger samples have been acquired. -
Page 19: Ai Sample Clock Signal
When using an internally generated AI Sample Clock, you also can specify a configurable delay from AI Start Trigger to the first AI Sample Clock pulse. By default, this delay is set to two ticks of the AI Sample Clock Timebase signal. © National Instruments | 2-11... -
Page 20: Ai Sample Clock Timebase Signal
Chapter 2 Using the NI PXIe-4300 Figure 2-6 shows the relationship of AI Sample Clock to AI Start Trigger. Figure 2-6. AI Sample Clock and AI Start Trigger AI Sample Clock Timebase AI Start Trigger AI Sample Clock Delay From Start Trigger AI Sample Clock Timebase Signal... -
Page 21: Figure 2-7. Retriggerable Analog Input
AI Start Trigger. Refer to the AI Reference Trigger Signal section for a complete description of the use of AI Start Trigger and AI Reference Trigger in a pretriggered DAQ operation. © National Instruments | 2-13... -
Page 22: Ai Reference Trigger Signal
Chapter 2 Using the NI PXIe-4300 AI Reference Trigger Signal Use AI Reference Trigger (ai/ReferenceTrigger) signal to stop a measurement acquisition. To use a reference trigger, specify a buffer of finite size and a number of pretrigger samples (samples that occur before the reference trigger). The number of posttrigger samples (samples that occur after the reference trigger) desired is the buffer size minus the number of pretrigger samples. -
Page 23: Ai Pause Trigger Signal
PXIe_DSTAR <A, B> The source also can be one of several other internal signals on your DAQ device. Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW Help for more information. © National Instruments | 2-15... -
Page 24: Getting Started With Ai Applications In Software
Chapter 2 Using the NI PXIe-4300 Routing AI Pause Trigger Signal to an Output Terminal You can route AI Pause Trigger out to any PXI_Trig <0..7>, PXI_STAR, or PXIe_DSTARC terminal. Pause triggers are only sensitive to the level of the source, not the edge. Note Getting Started with AI Applications in Software You can use the NI PXIe-4300 modules in the following analog input applications:... -
Page 25: External Reference Clock
Do not disconnect an external reference clock once the modules have been Caution synchronized or are used by a task. Doing so may cause NI-DAQmx to return an error. Make sure that all tasks using a reference clock are stopped before disconnecting it. © National Instruments | 2-17... -
Page 26: 10 Mhz Reference Clock
Chapter 2 Using the NI PXIe-4300 10 MHz Reference Clock The 10 MHz reference clock can be used to synchronize other devices to the NI PXIe-4300 module. The 10 MHz reference clock can be routed to the PXI_Trig <0..7> terminals. Other devices connected to the PXI_Trig bus can use this signal as a clock input. -
Page 27: Triggering
In a reference triggered acquisition, you configure the device to acquire a certain number of pre-trigger samples and a certain number of post-trigger samples. © National Instruments | 2-19... -
Page 28: Figure 2-12. Analog Trigger Level
Chapter 2 Using the NI PXIe-4300 The trigger circuit generates an internal digital trigger based on the input signal and the user-defined trigger levels. For example, you can configure the device to generate an analog comparison event after the input signal crosses a specific threshold. You also can route the resulting reference trigger event to the PXI Express trigger bus to synchronize the triggering of other devices in the system. -
Page 29: Figure 2-13. Analog Edge Triggering With Hysteresis On Rising Slope
The trigger asserts as the signal falls below 3.2 V and deasserts when it rises above 4.2 V, as shown in Figure 2-14. Figure 2-14. Analog Edge Triggering with Hysteresis on Falling Slope 4.2 V Hysteresis 3.2 V Level Analog Comparison Reference Trigger © National Instruments | 2-21... -
Page 30: Digital Input Triggering
Chapter 2 Using the NI PXIe-4300 Window Triggering A window trigger occurs when an analog signal either passes into (enters) or passes out of (leaves) a window defined by two levels. Specify the levels by setting a value for the top and bottom window boundaries. -
Page 31: Accessory Auto-Detection
115 V for U.S. or 230 V for Europe. Do not connect the NI PXIe-4300 module to signals or use for measurements within Measurement Categories III or IV. © National Instruments | 2-23... -
Page 32: Sc Express Considerations
On SC Express modules, the eight PXI trigger signals are synonymous with PXI_Trig <0..7>. Note that in a PXI chassis with more than eight slots, the PXI trigger lines may be divided into multiple independent buses. Refer to the documentation for your chassis for details. © National Instruments | 3-1... -
Page 33: Pxi_Star Trigger
Chapter 3 SC Express Considerations PXI_STAR Trigger In a PXI Express system, the Star Trigger bus implements a dedicated trigger line between the system timing slot and the other peripheral slots. The Star Trigger can be used to synchronize multiple devices or to share a common trigger signal among devices. A Star Trigger controller can be installed in this system timing slot to provide trigger signals to other peripheral modules. -
Page 34: Data Transfer Methods
Programmed I/O—Programmed I/O is a data transfer mechanism where the user’s program is responsible for transferring data. Each read or write call in the program initiates the transfer of data. Programmed I/O is typically used in software-timed (on-demand) operations. © National Instruments | 3-3... -
Page 35: Ni Services
NI Services National Instruments provides global services and support as part of our commitment to your success. Take advantage of product services in addition to training and certification programs that meet your needs during each phase of the application life cycle; from planning and development through deployment and ongoing maintenance. - Page 36 Appendix A NI Services • Training and Certification—The NI training and certification program is the most effective way to increase application development proficiency and productivity. Visit for more information. ni.com/training – The Skills Guide assists you in identifying the proficiency requirements of your current application and gives you options for obtaining those skills consistent with your time and budget constraints and personal learning preferences.
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