National Instruments VXI-MIO Series User Manual
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National Instruments VXI-MIO Series User Manual

Multifunction i/o modules for vxibus
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VXI-MIO Series
User Manual
Multifunction I/O Modules for VXIbus
August 1996 Edition
Part Number 321246A-01
Copyright 1996 National Instruments Corporation. All Rights Reserved.

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  • Page 1 Click here to comment on this document via the National Instruments website at http://www.natinst.com/documentation/daq/ VXI-MIO Series User Manual Multifunction I/O Modules for VXIbus August 1996 Edition Part Number 321246A-01 Copyright 1996 National Instruments Corporation. All Rights Reserved.
  • Page 2 Norway 32 84 84 00, Singapore 2265886, Spain 91 640 0085, Sweden 08 730 49 70, Switzerland 056 200 51 51, Taiwan 02 377 1200, U.K. 01635 523545 National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 Tel: (512) 794-0100...

  • Page 3: Important Information

    Important Information Warranty The VXI-MIO Series boards are 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.

  • Page 4: Table Of Contents

    National Instruments Documentation ...xiii Related Documentation ...xiv Customer Communication ...xiv Chapter 1 Introduction About the VXI-MIO Series ...1-1 What You Need to Get Started ...1-2 Software Programming Choices ...1-2 National Instruments Application Software ...1-2 NI-DAQ Driver Software ...1-3 VXIplug&play Instrument Drivers ...1-4 Optional Equipment ...1-5...
  • Page 5 Single-Ended Connections for Floating Signal Sources (RSE Configuration) ... 4-19 Single-Ended Connections for Grounded Signal Sources (NRSE Configuration) ... 4-19 Common-Mode Signal Rejection Considerations ... 4-20 Analog Output Signal Connections ... 4-20 Digital I/O Signal Connections ... 4-22 VXI-MIO Series User Manual National Instruments Corporation...
  • Page 6 GPCTR1_GATE Signal ...4-41 GPCTR1_OUT Signal ...4-42 GPCTR1_UP_DOWN Signal ...4-43 FREQ_OUT Signal ...4-44 Field Wiring Considerations ...4-45 Chapter 5 Calibration Loading Calibration Constants ...5-1 Self-Calibration ...5-2 External Calibration ...5-2 Other Considerations ...5-3 National Instruments Corporation VXI-MIO Series User Manual Table of Contents...
  • Page 7 Figure 2-4. SIMM Size Configuration ... 2-6 Figure 2-5. Load User/Factory Configuration ... 2-8 Figure 2-6. Protect/Change Factory Configuration ... 2-8 Figure 3-1. VXI-MIO Series Block Diagram ... 3-2 Figure 3-2. Dither ... 3-8 Figure 3-3. Analog Trigger Block Diagram ... 3-12 Figure 3-4.
  • Page 8 Figure 4-1. I/O Connector Pin Assignment for the VXI-MIO-64E-1 and VXI-MIO-64XE-10 ...4-2 Figure 4-2. VXI-MIO Series PGIA ...4-10 Figure 4-3. Summary of Analog Input Connections ...4-13 Figure 4-4. Differential Input Connections for Ground-Referenced Signals ...4-15 Figure 4-5. Differential Input Connections for Nonreferenced Signals ...4-16 Figure 4-6.
  • Page 9 Table of Contents Tables Table 2-1. VXI-MIO Series DRAM Configuration ... 2-6 Table 3-1. Available Input Configurations for the VXI-MIO Series ... 3-3 Table 3-2. Actual Range and Measurement Precision ... 3-4 Table 3-3. Actual Range and Measurement Precision, VXI-MIO-64XE-10 ... 3-6 Table 4-1.

  • Page 10: Organization Of This Manual

    This manual describes the electrical and mechanical aspects of each module in the VXI-MIO Series product line and contains information concerning their installation, operation, and programming. Unless otherwise noted, text applies to all modules in the VXI-MIO Series. The VXI-MIO Series includes the following modules: •...
  • Page 11 Bold italic text denotes a note, caution, or warning. italic Italic text denotes emphasis on a specific module in the VXI-MIO Series or on other important information, a cross reference, or an introduction to a key concept. NI-DAQ NI-DAQ refers to the NI-DAQ software for PC compatibles unless otherwise noted.
  • Page 12 National Instruments Documentation The VXI-MIO Series User Manual is one piece of the documentation set for your VXI-DAQ system. You could have any of several types of manuals depending on the hardware and software in your system. Use the manuals you have as follows: •...

  • Page 13: Related Documentation

    • Customer Communication National Instruments wants to receive your comments on our products and manuals. We are interested in the applications you develop with our products, and we want to help if you have problems with them. To make it easy for you to contact us, this manual contains comment and configuration forms for you to complete.

  • Page 14: About The Vxi-Mio Series

    VXIbus triggers to synchronize measurements on several VXI-MIO Series modules. You can interface the VXI-MIO Series modules to an SCXI signal conditioning and multiplexing system to acquire over 3,000 analog signals from thermocouples, RTDs, strain gauges, voltage sources, and current sources.

  • Page 15: What You Need To Get Started

    Chapter 1 Introduction What You Need to Get Started To set up and use your VXI-MIO Series module, you will need the following: Software Programming Choices There are several options to choose from when programming your National Instruments VXI-DAQ hardware. You can use LabVIEW,...

  • Page 16: Ni-Daq Driver Software

    The LabVIEW Data Acquisition VI Library, a series of VIs for using LabVIEW with National Instruments DAQ hardware, is included with LabVIEW. The LabVIEW Data Acquisition VI Library is functionally equivalent to the NI-DAQ software.

  • Page 17: Vxiplug&Play Instrument Drivers

    VXI plug&play Instrument Drivers National Instruments distributes VXIplug&play instrument drivers free of charge. VXIplug&play instrument drivers are one level above the NI-DAQ device driver and contain high-level software functions whose architecture is specified by the VXIplug&play Systems Alliance.

  • Page 18: Optional Equipment

    Optional Equipment National Instruments offers a variety of products to use with your VXI-MIO Series module, including cables, connector blocks, and other accessories, as follows: • • • • For more specific information about these products, refer to your National Instruments catalogue or call the office nearest you.

  • Page 19: Custom Cabling

    • • Unpacking Your VXI-MIO Series module is shipped in an antistatic package to prevent electrostatic damage to the module. Electrostatic discharge can damage several components on the module. To avoid such damage in handling the module, take the following precautions: •...

  • Page 20: Module Configuration

    A16 address space. Logical address 0 is reserved for the Resource Manager in the VXIbus system. Because the VXI-MIO Series modules cannot act as a Resource Manager, do not configure the VXI-MIO Series modules with a logical address of 0. The factory-default logical address for the VXI-MIO-64E-1 is 3 and for the VXI-MIO-64XE-10 is 2.
  • Page 21 Ensure that no other statically configurable VXIbus modules have the same logical address as the VXI-MIO Series module. If they do, change the logical address setting of either the VXI-MIO Series module or the other module so that every module in the system has a different associated logical address.

  • Page 22: Figure 2-1. Vxi-Mio-64E-1 Parts Locator Diagram

    3 Assembly Number National Instruments Corporation 4 P3 7 S2 5 Serial Number 8 S3 6 S1 9 Logical Address Switch Figure 2-1. VXI-MIO-64E-1 Parts Locator Diagram Chapter 2 Configuration and Installation 10 P1 11 P2 VXI-MIO Series User Manual...
  • Page 23 Configuration and Installation 1 DRAM 2 Product Name 3 Assembly Number Figure 2-3 shows the VXI-MIO-64XE-10 switch settings for logical address 2 and 192. VXI-MIO Series User Manual 4 P3 7 S3 5 S1 8 Logical Address Switch (U73) 6 S2 9 Serial Number Figure 2-2.

  • Page 24: Simm Size

    SIMMs, so that you can install up to 64 MB. The VXI-MIO module supports DRAM speeds of 80 ns or faster. Use switch S3 to select the size of each SIMM. The SIMM sockets are accessible only by removing the component right side cover, but S3 is...

  • Page 25: Figure 2-4. Simm Size Configuration

    2. If the SIMMs are 4 MB x 32 bit or larger, set S3 as shown in 3. For SIMMs smaller than 4 MB x 32 bit, set S3 as shown in Refer to Table 2-1 to properly adjust the switch (ON or OFF) for all supported DRAM configurations. Many of the DRAM options are available from National Instruments.

  • Page 26: Load User/Factory Configuration

    Use switch S2 to control the operation of the EEPROM. The switch causes the VXI-MIO module to boot off the factory-configured half instead of the user-modified settings.

  • Page 27: Hardware Installation

    Use switch S1 to change the factory-default configuration settings by permitting writes to the factory settings section of the EEPROM. This switch serves as a safety measure and should not be needed under normal circumstances. When this switch is off (its default setting) the factory configuration of the EEPROM is protected, so any writes to the factory area will be ignored.

  • Page 28: Software Installation

    VXIbus controller. If VISA is not installed, you must get this information from your VXIbus controller manufacturer. If you have a National Instruments VXIbus controller, contact our sales department for information on obtaining the NI-VISA software at no charge.
  • Page 29 LabWindows/CVI, refer to the NI-DAQ release notes and follow the instructions given there for your operating system and LabWindows/CVI. If you are using ComponentWorks, Measure, or VirtualBench application software, refer to your documentation for installation instructions. VXI-MIO Series User Manual 2-10 National Instruments Corporation...

  • Page 30: Hardware Overview

    Chapter Hardware Overview This chapter presents an overview of the hardware functions on your VXI-MIO Series module. Figure 3-1 shows the block diagram for the VXI-MIO Series modules. National Instruments Corporation VXI-MIO Series User Manual...

  • Page 31: Figure 3-1. Vxi-Mio Series Block Diagram

    Chapter 3 Hardware Overview VXI Bus Level) (TTL Triggers CLK10 Analog Bus I/O Connector Figure 3-1. VXI-MIO Series Block Diagram VXI-MIO Series User Manual National Instruments Corporation...

  • Page 32: Analog Input

    Analog Input The analog input section of each VXI-MIO Series module is software configurable. You can select different analog input configurations through application software designed to control the VXI-MIO Series modules. The following sections describe in detail each of the analog input categories.

  • Page 33: Input Polarity And Input Range

    Connections, which contains diagrams showing the signal paths for the three configurations. Input Polarity and Input Range VXI-MIO Series User Manual VXI-MIO-64E-1 This module has two input polarities—unipolar and bipolar. The VXI-MIO-64E-1 has a unipolar input range of 10 V (0 to 10 V) and a bipolar input range of 10 V ( 5 V).

  • Page 34: Table 3-2. Actual Range And Measurement Precision

    -2.5 to +2.5 V 1.22 mV -1 to +1 V 488.28 V -500 to +500 mV 244.14 V -250 to +250 mV 122.07 V -100 to +100 mV 48.83 V -50 to +50 mV 24.41 V VXI-MIO Series User Manual...

  • Page 35: Considerations For Selecting Input Ranges

    (below 0 V), unipolar input polarity is best. However, if the signal is negative or equal to zero, using unipolar input polarity will yield inaccurate readings. VXI-MIO Series User Manual the overall input range and precision according to the configuration and gain used.

  • Page 36: Dither

    Gaussian noise to the signal to be converted by the ADC. This addition is useful for applications involving averaging to increase the resolution of your VXI-MIO Series module, as in calibration or spectral analysis. In such applications, noise modulation is decreased and differential linearity is improved by the addition of the dither.

  • Page 37: Multichannel Scanning Considerations

    Multichannel Scanning Considerations All of the VXI-MIO Series modules can scan multiple channels at the same maximum rate as their single-channel rate; however, you should pay careful attention to the settling times for each of the modules. Refer to Appendix A, Specifications, for a complete listing of settling times for each of the VXI-MIO Series modules.
  • Page 38 (for example, 100 points from channel 0, then 100 points from channel 1, then 100 points from channel 2, and so on). National Instruments Corporation Chapter 3 to perform high-speed VXI-MIO Series User Manual Hardware Overview...

  • Page 39: Analog Output

    If you select unipolar range, data is interpreted in straight binary format. In straight binary mode, data values written to the analog output channel range must be positive. VXI-MIO Series User Manual VXI-MIO-64E-1 This module supplies two channels of analog output voltage at the I/O connector.

  • Page 40: Analog Output Reglitch Selection

    Reglitching is normally disabled at startup and can be independently enabled for each channel through software. VXI-MIO-64XE-10 This module does not require reglitch selection. 3-11 Chapter 3 Hardware Overview VXI-MIO Series User Manual...

  • Page 41: Figure 3-3. Analog Trigger Block Diagram

    HighValue is unused. In above-high-level analog triggering mode, the trigger is generated when the signal value is greater than highValue. LowValue is unused. VXI-MIO Series User Manual PGIA Figure 3-3. Analog Trigger Block Diagram...

  • Page 42: Figure 3-5. Above-High-Level Analog Triggering Mode

    National Instruments Corporation highValue Trigger Figure 3-5. Above-High-Level Analog Triggering Mode highValue lowValue Trigger Figure 3-6. Inside-Region Analog Triggering Mode highValue lowValue Trigger Figure 3-7. High-Hysteresis Analog Triggering Mode 3-13 Chapter 3 Hardware Overview VXI-MIO Series User Manual...

  • Page 43: Digital I/O

    Digital I/O The VXI-MIO Series modules contain eight lines of digital I/O for general-purpose use. You can individually configure each line through software for either input or output. At system startup and reset, the digital I/O ports are all high impedance.

  • Page 44: Timing Signal Routing

    Programmable Function Input (PFI) pins on the I/O connector for connecting to external circuitry. These connections are designed to enable the VXI-MIO Series module to both control and be controlled by other modules and circuits. There are a total of 13 timing signals internal to the DAQ-STC that can be controlled by an external source.

  • Page 45: Programmable Function Inputs

    A/D conversions, DAC updates, or general-purpose signals at the I/O connector. A VXI-MIO Series module can use either its internal 20 MHz timebase, which is phase-locked to CLK10 on the VXIbus, or a timebase received over a VXIbus trigger line. In addition, if you configure the module to...

  • Page 46: Vxibus Triggers

    VXIbus Triggers The VXI-MIO Series modules can use up to seven of the 10 VXIbus trigger lines to coordinate sampling and/or triggering across multiple modules. When using NI-DAQ software, the VXIbus trigger lines are functionally equivalent to RTSI bus trigger lines.

  • Page 47: Signal Connections

    Signal Connections This chapter describes how to make input and output signal connections to your VXI-MIO Series module via the module I/O connector. The VXI-MIO-64E-1 and VXI-MIO-64XE-10 I/O connector has 96 pins that you can connect to 68-pin accessories with the SH966868 shielded cable.

  • Page 48: Vxi-Mio-64Xe-10

    Chapter 4 Signal Connections PFI9/GPCTR0_GATE PFI6/WFTRIG PFI4/GPCTR1_GATE PFI1/TRIG2 DAC0OUT AISENSE2 VXI-MIO Series User Manual GPCTR0_OUT PFI7/STARTSCAN GPCTR1_OUT PFI2/CONVERT* +5 V EXTSTROBE* DIO7 DGND DIO2 DIO6 DIO4 DIO1 AOGND ACH0 EXTREF ACH9 ACH1 ACH3 ACH10 ACH4 AISENSE ACH13 ACH5 ACH7 ACH14...

  • Page 49: I/O Connector Signal Descriptions

    All three ground references—AIGND, AOGND, and DGND—are connected together on your VXI-MIO Series module. Input Analog Input Channels 0 through 15—Each channel pair, ACH<i, i+8> (i = 0..7), can be configured as either one differential input or two single-ended inputs.
  • Page 50 PFI3/GPCTR1_SOURCE DGND PFI4/GPCTR1_GATE DGND GPCTR1_OUT DGND VXI-MIO Series User Manual Direction Description (Continued) Output Scan Clock—This pin pulses once for each A/D conversion in the scanning modes when enabled. The low-to-high edge indicates when the input signal can be removed from the input or switched to another signal.
  • Page 51 0. Output Counter 0 Output—This output is from the general-purpose counter 0 output. Output Frequency Output—This output is from the frequency generator output. Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 52: Table 4-1. Vxi-Mio-64E-1 I/O Signal Summary

    DAC1OUT EXTREF AOGND DGND +5 V DIO<0..7> SCANCLK EXTSTROBE* PFI0/TRIG1 ADIO PFI1/TRIG2 PFI2/CONVERT* PFI3/GPCTR1_SOURCE PFI4/GPCTR1_GATE VXI-MIO Series User Manual VXI-MIO-64E-1 I/O Signal Summary Impedance Protection Source Input/ (Volts) (mA at V) Output Power On/Off 100 G 25/15 — in parallel...
  • Page 53 5 at 0.4 50 k pu 5 at 0.4 50 k pu 5 at 0.4 50 k pu 5 at 0.4 50 k pu 5 at 0.4 50 k pu 5 at 0.4 50 k pu VXI-MIO Series User Manual...

  • Page 54: Table 4-2. Vxi-Mio-64Xe-10 I/O Signal Summary

    DAC0OUT DAC1OUT AOGND DGND +5 V DIO<0..7> SCANCLK EXTSTROBE* PFI0/TRIG1 PFI1/TRIG2 PFI2/CONVERT* PFI3/GPCTR1_SOURCE PFI4/GPCTR1_GATE GPCTR1_OUT VXI-MIO Series User Manual VXI-MIO-64XE-10 I/O Signal Summary Impedance Protection Source Input/ (Volts) (mA at V) Output Power On/Off 100 G in 25/15 — parallel...

  • Page 55: Analog Input Signal Connections

    Warning: Exceeding the differential and common-mode input ranges distorts your input signals. Exceeding the maximum input voltage rating can damage the VXI-MIO Series module and your VXIbus system. National Instruments is connections. The maximum input voltage ratings are listed in Tables 4-1 and 4-2 in the Protection column.

  • Page 56: Figure 4-2. Vxi-Mio Series Pgia

    AISENSE/AISENSE signals are left unconnected. AIGND is an analog input common signal that is routed directly to the ground tie point on the VXI-MIO Series modules. You can use this signal for a general analog ground tie point to your VXI-MIO Series module if necessary.

  • Page 57: Types Of Signal Sources

    Tie the ground reference of a floating signal to your VXI-MIO Series module analog input ground to establish a local or onboard reference for the signal. Otherwise, the measured input signal varies as the source floats out of the common-mode input range.

  • Page 58: Input Configurations

    Chapter 4 Signal Connections Input Configurations You can configure your VXI-MIO Series module for one of three input modes—NRSE, RSE, or DIFF. The following sections discuss the use of single-ended and differential measurements and considerations for measuring both floating and ground-referenced signal sources.

  • Page 59: Figure 4-3. Summary Of Analog Input Connections

    Figure 4-3. Summary of Analog Input Connections 4-13 Chapter 4 Signal Connections Grounded Signal Source Examples • Plug-in instruments with nonisolated outputs ACH(+) ACH (-) AIGND NOT RECOMMENDED Ground-loop losses, V , are added to measured signal AISENSE AIGND VXI-MIO Series User Manual...

  • Page 60: Differential Connection Considerations (Diff Input Configuration)

    Signal Connections Differential Connection Considerations (DIFF Input Configuration) A differential connection is one in which the VXI-MIO Series module analog input signal has its own reference signal or signal return path. These connections are available when the selected channel is configured in DIFF input mode.

  • Page 61: Differential Connections For Ground-Referenced Signal Sources

    Differential Connections for Ground-Referenced Signal Sources Figure 4-4 shows how to connect a ground-referenced signal source to a channel on a VXI-MIO Series module configured in DIFF input mode. Ground- Referenced Signal Source Common- Mode Noise and Ground Potential I/O Connector Figure 4-4.

  • Page 62: Differential Connections For Nonreferenced Or Floating Signal Sources

    Chapter 4 Signal Connections Differential Connections for Nonreferenced or Floating Signal Sources Figure 4-5 shows how to connect a floating signal source to a channel on a VXI-MIO Series module configured in DIFF input mode. Bias resistors (see text) Floating...
  • Page 63 Refer to Application Note 025, Field Wiring and Noise Considerations for Analog Signals, for more information. National Instruments Corporation 4-17 VXI-MIO Series User Manual...

  • Page 64: Single-Ended Connection Considerations

    Signal Connections Single-Ended Connection Considerations A single-ended connection is one in which the VXI-MIO Series module analog input signal is referenced to a ground that can be shared with other input signals. The input signal is tied to the PGIA positive input, and the ground is tied to the PGIA negative input.

  • Page 65: Single-Ended Connections For Floating Signal Sources (Rse Configuration)

    Sources (NRSE Configuration) To measure a grounded signal source with a single-ended configuration, you must configure your VXI-MIO Series module in the NRSE input configuration. The signal is then connected to the module’s PGIA positive input, and the signal local ground reference is connected to the PGIA negative input.

  • Page 66: Common-Mode Signal Rejection Considerations

    Figures 4-6 and 4-7 show connections for signal sources that are already referenced to some ground point with respect to the VXI-MIO Series module. In these cases, the PGIA can reject any voltage caused by ground potential differences between the signal source and the module.

  • Page 67: Figure 4-8. Analog Output Connections

    Absolute maximum ratings: AOGND is the ground reference signal for both analog output channels and the external reference signal. Figure 4-8 shows how to make analog output connections and the external reference input connection to your VXI-MIO Series module. External Reference Signal...

  • Page 68: Digital I/O Signal Connections

    DIO port. You can program all lines individually to be inputs or outputs. Warning: Exceeding the maximum input voltage ratings, which are listed in Tables 4-1 and 4-2, can damage the VXI-MIO Series module. National Instruments is signal connections.

  • Page 69: Power Connections

    Warning: Under no circumstances should you connect these +5 V power pins directly to analog or digital ground or to any other voltage source on the VXI-MIO Series module or any other device. Doing so can damage the VXI-MIO Series module and your device. National Instruments is liable for damages resulting from such a connection.

  • Page 70: Programmable Function Input Connections

    All digital timing connections are referenced to DGND. This reference is demonstrated in Figure 4-10, which shows how to connect an external TRIG1 source and an external CONVERT* source to two of the VXI-MIO Series module PFI pins. TRIG1 Source...

  • Page 71: Data Acquisition Timing Connections

    The description for each signal shown in these figures is included later in this chapter. STARTSCAN CONVERT* Scan Counter National Instruments Corporation TRIG1 Figure 4-11. Typical Posttriggered Acquisition 4-25 Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 72: Scanclk Signal

    An external device can use this signal to latch signals or to trigger events. In the single-pulse mode, your software controls the EXTSTROBE* VXI-MIO Series User Manual Figure 4-12. Typical Pretriggered Acquisition CONVERT* SCANCLK Figure 4-13.

  • Page 73: Trig1 Signal

    Figures 4-15 and 4-16 show the input and output timing requirements for the TRIG1 signal. National Instruments Corporation = 600 ns or 5 s Figure 4-14. EXTSTROBE* Signal Timing 4-27 Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 74: Trig2 Signal

    The selected edge of the TRIG2 signal initiates the posttriggered phase of a pretriggered acquisition sequence. In pretriggered mode, the TRIG1 signal initiates the data acquisition. The scan counter indicates the minimum number of VXI-MIO Series User Manual Rising-edge polarity Falling-edge...

  • Page 75: Figure 4-17. Trig2 Input Signal Timing

    Figures 4-17 and 4-18 show the input and output timing requirements for the TRIG2 signal. National Instruments Corporation Rising-edge polarity Falling-edge polarity = 10 ns minimum Figure 4-17. TRIG2 Input Signal Timing = 50-100 ns Figure 4-18. TRIG2 Output Signal Timing 4-29 Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 76: Startscan Signal

    STARTSCAN will be deasserted t conversion in the scan is initiated. This signal is set to input (High-Z) at startup. Figures 4-19 and 4-20 show the input and output timing requirements for the STARTSCAN signal. VXI-MIO Series User Manual Rising-edge polarity Falling-edge polarity = 10 ns minimum Figure 4-19.

  • Page 77: Figure 4-20. Startscan Output Signal Timing

    STARTSCAN will generate a conversion. Separate the STARTSCAN pulses by at least one scan period. A counter on your VXI-MIO Series module internally generates the STARTSCAN signal unless you select some external source. This counter is started by the TRIG1 signal and is stopped either by software or by the sample counter.

  • Page 78: Convert* Signal

    50 to 100 ns. This signal is set to input (High-Z) at startup. Figures 4-21 and 4-22 show the input and output timing requirements for the CONVERT* signal. VXI-MIO Series User Manual Rising-edge polarity Falling-edge...

  • Page 79: Aigate Signal

    Separate the CONVERT* pulses by at least one conversion period. The sample interval counter on the VXI-MIO Series module normally generates the CONVERT* signal unless you select some external source. The STARTSCAN signal starts the counter and the counter continues to count down and reload itself until the scan is finished.

  • Page 80: Sisource Signal

    SISOURCE signal unless you select some external source. Figure 4-23 shows the timing requirements for the SISOURCE signal. Waveform Generation Timing Connections The analog group defined for your VXI-MIO Series module is controlled by WFTRIG, UPDATE*, and UISOURCE. WFTRIG Signal Any PFI pin can externally input the WFTRIG signal, which is available as an output on the PFI6/WFTRIG pin.

  • Page 81: Figure 4-24. Wftrig Input Signal Timing

    Figures 4-24 and 4-25 show the input and output timing requirements for the WFTRIG signal. National Instruments Corporation Rising-edge polarity Falling-edge polarity = 10 ns minimum Figure 4-24. WFTRIG Input Signal Timing = 50-100 ns Figure 4-25. WFTRIG Output Signal Timing 4-35 Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 82: Update* Signal

    300 to 350 ns. This signal is set to input (High-Z) at startup. Figures 4-26 and 4-27 show the input and output timing requirements for the UPDATE* signal. VXI-MIO Series User Manual 4-36 National Instruments Corporation...

  • Page 83: Uisource Signal

    UPDATE* pulses with enough time that new data can be written to the DAC latches. The VXI-MIO Series module UI counter normally generates the UPDATE* signal unless you select some external source. The UI counter is started by the WFTRIG signal and can be stopped by software or the internal Buffer Counter.

  • Page 84: General-Purpose Timing Signal Connections

    0. This is true even if another PFI is externally inputting the source clock. This signal is set to input (High-Z) at startup. VXI-MIO Series User Manual = 50 ns minimum = 23 ns minimum Figure 4-28. UISOURCE Signal Timing...

  • Page 85: Gpctr0_Gate Signal

    PFI. This signal is set to input (High-Z) at startup. Figure 4-30 shows the timing requirements for the GPCTR0_GATE signal. National Instruments Corporation = 50 ns minimum = 23 ns minimum Figure 4-29. GPCTR0_SOURCE Signal Timing 4-39 Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 86: Gpctr0_Out Signal

    You can disable this input so that software can control the up-down functionality and leave the DIO6 pin free for general use. VXI-MIO Series User Manual = 10 ns minimum Figure 4-30. GPCTR0_GATE Signal Timing in Edge-Detection Mode Figure 4-31.

  • Page 87: Gpctr1_Source Signal

    As an input, the GPCTR1_GATE signal is configured in edge-detection mode. You can select any PFI pin as the source for GPCTR1_GATE and National Instruments Corporation = 50 ns minimum = 23 ns minimum Figure 4-32. GPCTR1_SOURCE Signal Timing 4-41 Chapter 4 Signal Connections VXI-MIO Series User Manual...

  • Page 88: Gpctr1_Gate Signal

    TC and toggle output polarity on TC. The output polarity is software- selectable for both options. This signal is set to input (High-Z) at startup. Figure 4-34 shows the timing requirements for the GPCTR1_OUT signal. VXI-MIO Series User Manual Rising-edge polarity Falling-edge polarity Figure 4-33.

  • Page 89: Gpctr1_Up_Down Signal

    Gate Hold Time Gate Pulse Width Output Delay Time Figure 4-35. GPCTR Timing Summary 4-43 Chapter 4 Signal Connections 50 ns minimum 23 ns minimum 10 ns minimum 0 ns minimum 10 ns minimum 80 ns maximum VXI-MIO Series User Manual...

  • Page 90: Freq_Out Signal

    FREQ_OUT Signal This signal is available only as an output on the FREQ_OUT pin. The FREQ_OUT signal is the output of the VXI-MIO Series module frequency generator. The frequency generator is a 4-bit counter that can divide its input clock by the numbers 1 through 16. The input clock of the frequency generator is software selectable from the internal 10 MHz and 100 kHz timebases.

  • Page 91: Field Wiring Considerations

    Field Wiring Considerations Environmental noise can seriously affect the accuracy of measurements made with your VXI-MIO Series module if you do not take proper care when running signal wires between signal sources and the module. The following recommendations apply mainly to analog input signal routing to the module, although they also apply to signal routing in general.

  • Page 92: Calibration

    Calibration refers to the process of minimizing measurement and output voltage errors by making small circuit adjustments. On the VXI-MIO Series modules, these adjustments take the form of writing values to onboard calibration DACs (CalDACs). Some form of module calibration is required for all but the most forgiving applications.

  • Page 93: Self-Calibration

    Self-Calibration Your VXI-MIO Series module can measure and correct for almost all of its calibration-related errors without any external signal connections. Your National Instruments software provides a self-calibration method for you.

  • Page 94: Other Considerations

    See Appendix A, Specifications, for analog output gain error information. National Instruments Corporation VXI-MIO Series User Manual Chapter 5 Calibration...

  • Page 95: Appendix A Specifications

    Specifications This appendix lists the specifications of each module in the VXI-MIO Series. These specifications are typical at 25 C unless otherwise noted. VXI-MIO-64E-1 Analog Input Input Characteristics Number of channels ... 64 single-ended or 32 Type of ADC... Successive approximation Resolution ...
  • Page 96 (signal + common mode)...Each input should remain within Overvoltage protection... 25 V powered on, FIFO buffer size...8,192 S Data transfers...DMA, interrupts, programmed Configuration memory size ...512 words VXI-MIO Series User Manual Inputs protected ... ACH<0..63>, AISENSE, Module Gain Module Range (Software...
  • Page 97 National Instruments Corporation Appendix A Gain 1 with gain error adjusted to 0 at gain = 1 ... 0.02% of reading max 2 ... 106 dB Specifications for VXI-MIO-64E-1 max undithered in parallel with 100 pF VXI-MIO Series User Manual...

  • Page 98: Dynamic Characteristics

    Recommended warm-up time...15 min Offset temperature coefficient Gain temperature coefficient ... 20 ppm/ C Onboard calibration reference VXI-MIO Series User Manual Small signal (-3 dB) Pregain ... 5 V/ C Postgain ... 240 V/ C Level ... 5.000 V ( 0.5 mV) (actual value Temperature coefficient...

  • Page 99: Output Characteristics

    Before calibration ... 3 LSB max After calibration... 1.0 mV max Before calibration ... 200 mV max After calibration... 0.01% of output max Before calibration ... 0.5% of output max Appendix A Specifications for VXI-MIO-64E-1 programmed I/O calibration VXI-MIO Series User Manual...
  • Page 100 Glitch energy (at midscale transition) Stability Offset temperature coefficient... 50 V/ C Gain temperature coefficient VXI-MIO Series User Manual Range ... 11 V Overvoltage protection ... 25 V powered on, 15 V Input impedance ... 10 k Bandwidth (-3 dB) ... 1 MHz Magnitude Reglitching disabled...
  • Page 101 Counter/timers ... 20 MHz, 100 kHz Appendix A Specifications for VXI-MIO-64E-1 stored in EEPROM) 1, 000 h Level — — — = 24 mA) 4.35 V = 13 mA) 1 frequency scaler VXI-MIO Series User Manual 0.8 V -320 A 10 A 0.4 V —...
  • Page 102 Response...Rising or falling edge Pulse width ...10 ns min VXIbus Trigger Trigger lines...Supports 5 TTL and 2 ECL VXI-MIO Series User Manual Frequency scalers ... 10 MHz, 100 kHz Impedance ... 10 k Coupling ... DC Protection ... -0.5 to 5.5 V when configured as...

  • Page 103: Power Requirement

    Operating temperature ... 0 to 55 C Storage temperature... -20 to 70 C Relative humidity ... 5% to 90% noncondensing National Instruments Corporation Appendix A Specifications for VXI-MIO-64E-1 (*Not including current used by accessories.) at 1 A VXI-MIO Series User Manual...

  • Page 104: Vxi-Mio-64Xe-10

    Maximum working voltage ...Each input should remain within Overvoltage protection... 25 V powered on, 15 V FIFO buffer size...512 S Data transfers...DMA, interrupts, programmed Configuration memory size ...512 words VXI-MIO Series User Manual Inputs protected ... ACH<0..63>, AISENSE, A-10 differential (software selectable) Module Gain...
  • Page 105 Gain = 20 ... 105 dB Gain = 50 ... 105 dB Gain = 100 ... 105 dB National Instruments Corporation Appendix A 1 ... 200 ppm of reading A-11 Specifications for VXI-MIO-64XE-10 in parallel with 100 pF VXI-MIO Series User Manual...
  • Page 106 Level...5.000 V ( 0.5 mV) (actual value Temperature coefficient ... 0.6 ppm/ C max Long-term stability ... 6 ppm/ 1, 000 h VXI-MIO Series User Manual All gains ... 255 kHz To 0.5 LSB ... 50 s typ To 1 LSB... 25 s typ To 6 LSB...
  • Page 107 Noise ... 60 Vrms, DC to 1 MHz National Instruments Corporation Appendix A After calibration... 305 V max Before calibration ... 20 mV max After calibration... 30.5 ppm max Before calibration ... 2,000 ppm max A-13 Specifications for VXI-MIO-64XE-10 (software selectable) VXI-MIO Series User Manual...
  • Page 108 Number of channels ...8 input/output Compatibility ...TTL/CMOS Digital logic levels... Power-on state ...Input (High-Z) Data transfers...Programmed I/O VXI-MIO Series User Manual Level ... 5.000 V ( 0.5 mV) (actual value Temperature coefficient... 0.6 ppm/ C max Long-term stability ... 6 ppm/ Input low voltage...
  • Page 109 Frequency scaler ... 4 bits Counter/timers ... 20 MHz, 100 kHz Frequency scaler ... 10 MHz, 100 kHz A-15 Specifications for VXI-MIO-64XE-10 1 frequency scaler programmed I/O Fullscale, internal; 10 V, external (software selectable) 4 MHz external VXI-MIO Series User Manual...
  • Page 110 I/O connector ...96-pin DIN Environment Operating temperature...0 to 55 C Storage temperature ...-20 to 70 C Relative humidity...5% to 90% noncondensing VXI-MIO Series User Manual Impedance ... 10 k Coupling... DC Protection ... -0.5 to 5.5 V when configured as A-16 a digital signal;...

  • Page 111: Optional Cable Connector Descriptions

    Figure B-1 shows the pin assignments for the 68-pin MIO connector. This connector is one of the two 68-pin connectors available when you use the SH966868 cable assembly with the VXI-MIO-64E-1 or VXI-MIO-64XE-10. National Instruments Corporation Appendix VXI-MIO Series User Manual...

  • Page 112: Figure B-1. 68-Pin Mio Connector Pin Assignments

    Appendix B Optional Cable Connector Descriptions VXI-MIO Series User Manual 34 68 ACH8 ACH1 33 67 AIGND 32 66 31 65 ACH10 30 64 ACH3 AIGND 29 63 ACH4 28 62 AIGND 27 61 ACH13 26 60 ACH6 25 59...

  • Page 113: Figure B-2. 68-Pin Extended Analog Input Connector Pin Assignments

    ACH 22 ACH 31 ACH 40 ACH 33 ACH 42 ACH 43 AISENSE2 ACH 36 ACH 45 ACH 46 ACH 39 ACH 56 ACH 57 ACH 50 ACH 59 ACH 60 ACH 53 ACH 62 ACH 63 VXI-MIO Series User Manual...

  • Page 114: Appendix C Common Questions

    Common Questions This appendix contains a list of commonly asked questions and their answers relating to usage and special features of your VXI-MIO Series module. General Information National Instruments Corporation What is the DAQ-STC? The DAQ-STC is the system timing control ASIC (application-specific integrated circuit) designed by National Instruments and is the backbone of the VXI-MIO Series modules.

  • Page 115: Installation And Configuration

    Appendix C Common Questions 3. What type of 5 V protection do the VXI-MIO Series modules Installation and Configuration 4. What jumpers should I be aware of when configuring my 5. Which National Instruments document should I read first to get 6.
  • Page 116 (CMRR). These methods are outlined in Chapter 4, Signal Connections. Can I sample across a number of channels on a VXI-MIO Series module while each channel is being sampled at a different rate? NI-DAQ features a function called SCAN_Sequence_Setup, which allows for multirate scanning of your analog input channels.
  • Page 117 0 (start). VXI-MIO Series module? Digital triggering is supported by hardware on every VXI-MIO Series module. In addition, the VXI-MIO-64E-1 and VXI-MIO-64XE-10 support analog triggering in hardware. contrast to the Am9513? The DAQ-STC incorporates much more than just 10 Am9513-style counters within one chip.
  • Page 118 14. I’m using one of the general-purpose counter/timers on my VXI-MIO Series module, but I do not see the counter/timer output on the I/O connector. What am I doing wrong? If you are using the NI-DAQ language interface or LabWindows/CVI, you must configure the output line to output the signal to the I/O connector.
  • Page 119 Table 4-1 shows that there is a 50 k pull-up resistor. This pull-up resistor will set the DIO(0) pin to a logic high when the output is in a high-impedance state. National Instruments Corporation Appendix C VXI-MIO Series User Manual Common Questions...

  • Page 120: Appendix D Customer Communication

    Electronic Services Bulletin Board Support National Instruments has BBS and FTP sites dedicated for 24-hour support with a collection of files and documents to answer most common customer questions. From these sites, you can also download the latest instrument drivers, updates, and example programs. For recorded instructions on how to use the bulletin board and FTP services and for BBS automated information, call (512) 795-6990.
  • Page 121 Fax and Telephone Support National Instruments has branch offices all over the world. Use the list below to find the technical support number for your country. If there is no National Instruments office in your country, contact the source from which you purchased your software to obtain support.
  • Page 122 National Instruments for technical support helps our applications engineers answer your questions more efficiently. If you are using any National Instruments hardware or software products related to this problem, include the configuration forms from their user manuals. Include additional pages if necessary.
  • Page 123 Complete a new copy of this form each time you revise your software or hardware configuration, and use this form as a reference for your current configuration. Completing this form accurately before contacting National Instruments for technical support helps our applications engineers answer your questions more efficiently.

  • Page 124: Vxi-Mio Series User Manual

    Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. Title: VXI-MIO Series User Manual Edition Date: August 1996 Part Number: 321246A-01 Please comment on the completeness, clarity, and organization of the manual.
  • Page 125 Meaning pico- nano- micro- milli- kilo- mega- giga- Symbols ˚ – National Instruments Corporation Value degree negative of, or minus percent plus or minus positive of, or plus square root of +5 VDC source signal Glossary VXI-MIO Series User Manual...
  • Page 126 AISENSE AISENSE2 ANSI AOGND VXI-MIO Series User Manual amperes VXIbus address space equivalent to the VME 64 KB short address space. In VXI, the upper 16 KB of A16 space is allocated for use by VXI module’s configuration registers. This 16 KB region is referred to as VXI configuration space.
  • Page 127 For digital signals, you group channels to form ports. Ports usually consist of either four or eight digital channels. Hardware component that controls timing for reading from or writing to groups. complementary metal-oxide semiconductor common-mode rejection ratio Glossary VXI-MIO Series User Manual...
  • Page 128 DAC0OUT DAC1OUT VXI-MIO Series User Manual Any communication, from a Commander to a Message-Based- Servant, that consists of a write to the Servants Data Low register, possibly preceded by a write to the Data High or Data High and Data Extended registers.
  • Page 129 DMA is the fastest method of transferring data to/from computer memory. differential nonlinearity—A measure in LSB of the worst-case deviation of code widths from their ideal value of 1 LSB. Dynamic RAM Software that controls a specific hardware device such as a DAQ board. Glossary VXI-MIO Series User Manual...
  • Page 130 EXTREF EXTSTROBE VXI-MIO Series User Manual Memory that can be sequentially, but not simultaneously, accessed by more than one controller or processor. Also known as shared memory. Memory that can be simultaneously accessed by more than one controller or processor.
  • Page 131 0 gate signal general purpose counter 1 gate signal general purpose counter 0 output signal general purpose counter 1 output signal general purpose counter 0 clock source signal Glossary VXI-MIO Series User Manual...
  • Page 132 VXI-MIO Series User Manual general purpose counter 1 clock source signal A collection of digital ports, combined to form a larger entity for digital input and/or output. Groups can contain analog input, analog output, digital input, digital output, or counter/timer channels.
  • Page 133 (bit) light-emitting diode An 8-bit number that uniquely identifies each VXIbus device in a system. It defines the A16 register addresses of a device, and indicates Commander and Servant relationships. least significant bit Glossary VXI-MIO Series User Manual...
  • Page 134 A memory storage device that has configuration registers. multifunction I/O A National Instruments custom ASIC. A sophisticated dual- channel DMA controller that incorporates the Synchronous MXI and VME64 protocols to achieve high-performance block transfer rates.
  • Page 135 The output limits determine the polarity and voltage reference settings for a board. The amount of time required for the analog output voltage to reach its final value within specified limits. personal computer Programmable Function Input Programmable Gain Instrumentation Amplifier G-11 Glossary VXI-MIO Series User Manual...
  • Page 136 It does not include offset and gain errors of the circuitry feeding the ADC. The name of the National Instruments Resource Manager in NI-VXI bus interface software. See Resource Manager. The smallest signal increment that can be detected by a measurement system.
  • Page 137 Real-Time System Integration Bus—The National Instruments timing bus that connects DAQ boards directly for precise synchronization of functions. For the VXI-MIO Series modules, the RTSI bus trigger lines are implemented using VXIbus trigger lines.
  • Page 138 RAM transfer rate TRIG trigger VXI-MIO Series User Manual Any communication between message-based devices consisting of a write to a Signal register. Single In-line Memory Module SI counter clock signal A position where a module can be inserted into a VXIbus backplane.
  • Page 139 Instruments to unify instrumentation software (GPIB, DAQ, and VXI). It has been accepted as a standard for VXI by the VXIplug&play Systems Alliance. volts, input high volts, input low volts in volts, output high volts, output low reference voltage G-15 Glossary VXI-MIO Series User Manual...
  • Page 140 Alliance waveform WFTRIG wire word serial VXI-MIO Series User Manual VMEbus eXtensions for Instrumentation These are the eight TTL and two ECL lines on the VXIbus backplane which are used for intermodule communication. Typical applications are triggering and clocking measurements.
  • Page 141 C-2 to C-4 output polarity selection, 3-10 to 3-11 reference selection, 3-10 reglitch selection, 3-11 signal connections, 4-20 to 4-21 analog output specifications VXI-MIO-64E-1 dynamic characteristics, A-6 output characteristics, A-5 stability, A-6 to A-7 I -1 VXI-MIO Series User Manual Index...
  • Page 142 VXI-MIO-64E-1 parts locator diagram, 2-3 VXI-MIO-64XE-10 parts locator diagram, 2-4 board configuration. See configuration. bulletin board support, D-1 VXI-MIO Series User Manual cables. See also I/O connectors. field wiring considerations, 4-45 optional cable connectors 68-pin extended analog input connector pin assignments (figure),...
  • Page 143 DRAM configuration (table), 2-6 to 2-7 dynamic characteristics analog input VXI-MIO-64E-1, A-4 VXI-MIO-64XE-10, A-12 analog output VXI-MIO-64E-1, A-6 VXI-MIO-64XE-10, A-13 EEPROM loading USER/FACTORY configuration, 2-7 to 2-8 protecting/changing factory configuration, 2-8 storage of calibration constants, 5-1 I -3 VXI-MIO Series User Manual Index...
  • Page 144 VXI-MIO-64XE-10 (table), 4-9 waveform generation timing connections, 4-44 frequently asked questions. See questions about VXI-MIO series. FTP support, D-1 VXI-MIO Series User Manual general-purpose timing signal connections, 4-38 to 4-44 FREQ_OUT signal, 4-44 GPCTR0_GATE signal, 4-39 to 4-40 GPCTR0_OUT signal, 4-40...
  • Page 145 (table), 3-6 installation. See also configuration. common questions about, C-2 hardware installation, 2-8 to 2-9 software installation, 2-9 to 2-10 unpacking VXI-MIO series boards, 1-6 I/O connectors, 4-1 to 4-9 exceeding maximum ratings (warning), 4-1 optional cable connectors 68-pin extended analog input...
  • Page 146 4-16 to 4-17 recommended configuration (figure), 4-13 single-ended connections (NRSE configuration), 4-19 to 4-20 onboard EEPROM. See EEPROM. operation of VXI-MIO series boards. See hardware overview. output characteristics VXI-MIO-64E-1, A-5 VXI-MIO-64XE-10, A-13 parts locator diagrams, 2-3, 2-4 PFI0/TRIG1 signal...
  • Page 147 (PFIs). See PFIs (programmable function inputs). programmable gain instrumentation amplifier. See PGIA (programmable gain instrumentation amplifier). questions about VXI-MIO series, C-1 to C-6 analog input and analog output, C-2 to C-4 general information, C-1 to C-2 installation and configuration, C-2...
  • Page 148 4-43 GPCTR1_SOURCE signal, 4-41 GPCTR1_UP_DOWN signal, 4-43 to 4-44 programmable function input connections, 4-24 to 4-25 VXI-MIO Series User Manual waveform generation timing connections, 4-34 to 4-38 UISOURCE signal, 4-37 to 4-38 UPDATE* signal, 4-36 to 4-37 WFTRIG signal, 4-34...
  • Page 149 GPCTR0_UP_DOWN signal, 4-40 GPCTR1_GATE signal, 4-41 to 4-42 GPCTR1_OUT signal, 4-42 to 4-43 GPCTR1_SOURCE signal, 4-41 GPCTR1_UP_DOWN signal, 4-43 to 4-44 programmable function input connections, 4-24 to 4-25 timing I/O connections (figure), 4-24 I -9 VXI-MIO Series User Manual Index...
  • Page 150 VXI-MIO series. UISOURCE signal, 4-37 to 4-38 unipolar input, mixing with bipolar channels (note), 3-5 unipolar output, 3-10 to 3-11 unpacking VXI-MIO series boards, 1-6 UPDATE* signal timing connections, 4-36 to 4-37 input timing (figure), 4-37 output timing (figure), 4-37...
  • Page 151 VXI-MIO series. See also hardware overview. common questions about, C-1 to C-6 custom cabling, 1-6 features, 1-1 optional equipment, 1-5 requirements for getting started, 1-2 software programming choices ComponentWorks, 1-2 LabVIEW and LabWindows/CVI, NI-DAQ driver software, 1-3 to 1-4 VirtualBench, 1-3 unpacking, 1-6 VXIplug&play instrument drivers,...

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