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National Instruments VXI-MIO Series , Differential Connections for Ground-Referenced Signal Sources

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Chapter 4 Signal Connections

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National Instruments Corporation 4-15 VXI-MIO Series User Manual

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.

Figure 4-4.

Differential Input Connections for Ground-Referenced Signals

With this type of connection, the PGIA rejects both the common-mode

noise in the signal and the ground potential difference between the

signal source and the VXI-MIO Series module ground, shown as V

in Figure 4-4.

Ground-

Referenced

Signal

Source

Common-

Mode

Noise and

Ground

Potential

Other Input Multiplexers

AISENSE

Instrumentation

Amplifier

VmMeasured

Voltage

AIGND

Vcm

I/O Connector

ACH<0..7>

ACH<8..15>

Selected Channel in DIFF Configuration

PGIA

Contents

Main Page Important Information WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS Trademarks Copyright Page Chapter 3 Hardware Overview Chapter 4 Signal Connections Chapter 5 Calibration Page Page Tables About This Manual Organization of This Manual About This Manual Conventions Used in This Manual National Instruments Documentation Related Documentation Customer Communication Introduction About the VXI-MIO Series What You Need to Get Started National Instruments Application Software Software Programming Choices NI-DAQ Driver Software VXI Instrument Drivers plug&play Optional Equipment Custom Cabling Unpacking Configuration and Installation VXIbus Logical Address Module Configuration Page Chapter 2 Conguration and Installation National Instruments Corporation 2-3 VXI-MIO Series User Manual Figure 2-1. VXI-MIO-64E-1 Parts Locator Diagram Chapter 2 Conguration and Installation VXI-MIO Series User Manual 2-4 Figure 2-3 shows the VXI-MIO-64XE-10 switch settings for logical address 2 and 192. SIMM Size Page Load USER/FACTORY Configuration Protect/Change Factory Configuration Hardware Installation Software Installation Page Page Chapter 3 Hardware Overview Configuration EEPROM Figure 3-1. VXI-MIO Series Block Diagram N.V. RAM VXI Bus Input Control Analog Input Input Mode Input Polarity and Input Range Page Considerations for Selecting Input Ranges Dither Multichannel Scanning Considerations Page Analog Output Analog Output Polarity Selection Analog Output Reference Selection Analog Trigger Page Page Digital I/O Timing Signal Routing Programmable Function Inputs Module and Timebase VXIbus Triggers Signal Connections I/O Connector VXI-MIO Series User Manual 4-2 Figure 4-1. I/O Connector Pin Assignment for the VXI-MIO-64E-1 and VXI-MIO-64XE-10 National Instruments Corporation 4-3 VXI-MIO Series User Manual I/O Connector Signal Descriptions VXI-MIO Series User Manual 4-4 National Instruments Corporation National Instruments Corporation 4-5 VXI-MIO Series User Manual VXI-MIO Series User Manual 4-6 Table 4-1 shows the I/O signal summary for the VXI-MIO-64E-1. VXI-MIO-64E-1 I/O Signal Summary Table 4-1. Table 4-1. VXI-MIO-64E-1 I/O Signal Summary (Continued) VXI-MIO Series User Manual 4-8 Table 4-2 shows the I/O signal summary for the VXI-MIO-64XE-10. VXI-MIO-64XE-10 I/O Signal Summary Table 4-2. Analog Input Signal Connections Page Types of Signal Sources Ground-Referenced Signal Sources Floating Signal Sources Page National Instruments Corporation 4-13 VXI-MIO Series User Manual Figure 4-3 summarizes the recommended input configuration for both types of signal sources. Summary of Analog Input Connections Figure 4-3. Differential Connection Considerations (DIFF Input Configuration) National Instruments Corporation 4-15 VXI-MIO Series User Manual Differential Connections for Ground-Referenced Signal Sources Differential Input Connections for Ground-Referenced Signals Figure 4-4. Differential Connections for Nonreferenced or Floating Signal Sources Page Single-Ended Connection Considerations Single-Ended Connections for Floating Signal Sources (RSE Configuration) Single-Ended Connections for Grounded Signal Sources (NRSE Configuration) Common-Mode Signal Rejection Considerations Analog Output Signal Connections Page Digital I/O Signal Connections Power Connections Timing Connections Programmable Function Input Connections Data Acquisition Timing Connections SCANCLK Signal EXTSTROBE* Signal TRIG1 Signal TRIG2 Signal Page STARTSCAN Signal Page CONVERT* Signal AIGATE Signal SISOURCE Signal WFTRIG Signal Waveform Generation Timing Connections Page UPDATE* Signal UISOURCE Signal General-Purpose Timing Signal Connections GPCTR0_SOURCE Signal GPCTR0_GATE Signal GPCTR0_OUT Signal GPCTR0_UP_DOWN Signal GPCTR1_SOURCE Signal GPCTR1_GATE Signal GPCTR1_OUT Signal National Instruments Corporation 4-43 VXI-MIO Series User Manual GPCTR1_UP_DOWN Signal FREQ_OUT Signal Field Wiring Considerations Calibration Loading Calibration Constants Self-Calibration External Calibration Other Considerations Specifications A VXI-MIO-64E-1 Analog Input Input Characteristics Page Amplifier Characteristics Page Analog Output Output Characteristics Voltage Output Digital I/O Timing I/O Triggers Analog Trigger Digital Trigger VXIbus Trigger Power Requirement Physical Environment VXI-MIO-64XE-10 Analog Input Input Characteristics Amplifier Characteristics Page Analog Output Output Characteristics Voltage Output Digital I/O Timing I/O Triggers Analog Trigger Digital Trigger VXIbus Trigger Power Requirement Physical Environment B Appendix B Optional Cable Connector Descriptions VXI-MIO Series User Manual B-2 Figure B-1. 68-Pin MIO Connector Pin Assignments Appendix B Optional Cable Connector Descriptions 68-Pin Extended Analog Input Connector Pin Assignments Figure B-2. Common Questions C General Information Installation and Configuration Analog Input and Output Page Timing and Digital I/O Page Page Customer Communication Electronic Services D Bulletin Board Support FTP Support Fax and Telephone Support Telephone Fax FaxBack Support E-Mail Support (currently U.S. only) Technical Support Form VXI-MIO Series Hardware and Software Configuration Form Other Products National Instruments Products Documentation Comment Form Symbols Glossary A B C D Page E F G H I K L M N O P Q R S T U V W A Numbers Index B C D E F G H I L P O N Q R S Page T U V W