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National Instruments PCI-6110E/6111E Differential Connections for Ground-Referenced Signal Sources, Differential Connections for Nonreferenced or Floating Signal Sources

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Chapter 4 Signal Connections

National Instruments Corporation 4-11 PCI-6110E/6111E User Manual

Differential Connections for Ground-Referenced Signal Sources

Figure 4-3 shows how to connect a ground-referenced signal source to

a channel on the 611X E board.

Figure 4-3. 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 611X E board ground, shown as Vcm in Figure 4-3.

Differential Connections for Nonreferenced or Floating Signal Sources

Figure 4-4 shows how to connect a floating signal source to a channel

on the 611X E board.

Ground-

Referenced

Signal

Source

Common-

Mode

Noise and

Ground

Potential

Instrumentation

Amplifier

VmMeasured

Voltage

ACH0GND

Vcm

I/O Connector

ACH0+

ACH0-

ACH0 Connections Shown

PGIA

PCI_E.book Page 11 Thursday, June 25, 1998 12:55 PM

Contents

Main Page Important Information Warranty Copyright Trademarks WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS Page Chapter 4 Signal Connections Page Figures Tables About This Manual Organization of This Manual Conventions Used in This Manual National Instruments Documentation Related Documentation Customer Communication Introduction X About the 611 E Boards What You Need to Get Started Software Programming Choices National Instruments Application Software NI-DAQ Driver Software Register-Level Programming Optional Equipment Custom Cabling Unpacking Installation and Configuration Software Installation Hardware Installation Board Configuration National Instruments Corporation 3-1 PCI-6110E/6111E User Manual PCI_E.book Page 1 Thursday, June 25, 1998 12:55 PM Hardware Overview DAQ - STC RTSI Bus Figure 3-1. PCI-6110E Block Diagram I/O Connector Analog Input Input Mode I/O Connector PCI Bus IRQ DMA Input Polarity and Input Range Considerations for Selecting Input Ranges Input Coupling Dither Chapter 3 Hardware Overview PCI_E.book Page 5 Thursday, June 25, 1998 12:55 PM Analog Output a. Dither disabled; no averaging b. Dither disabled; average of 50 acquisitions Analog Trigger Page Page Page Digital I/O Timing Signal Routing Programmable Function Inputs Board and RTSI Clocks RTSI Triggers Signal Connections I/O Connector Figure 4-1. I/O Connector Pin Assignment for the 611 E PCI-6110E/6111E User Manual 4-2 National Instruments Corporation National Instruments Corporation 4-3 PCI-6110E/6111E User Manual I/O Connector Signal Descriptions Table 4-1. Signal Descriptions for I/O Connector Pins PCI-6110E/6111E User Manual 4-4 National Instruments Corporation Table 4-1. Signal Descriptions for I/O Connector Pins (Continued) National Instruments Corporation 4-5 PCI-6110E/6111E User Manual Table 4-1. Signal Descriptions for I/O Connector Pins (Continued) PCI-6110E/6111E User Manual 4-6 National Instruments Corporation Table 4-2 shows the I/O signal summary for the 611X E boards. Table 4-2. I/O Signal Summary for the 611 E Table 4-2. I/O Signal Summary for the 611 National Instruments Corporation 4-7 PCI-6110E/6111E User Manual E (Continued) Analog Input Signal Connections - Types of Signal Sources Floating Signal Sources Ground-Referenced Signal Sources Differential Measurements Differential Connection Considerations National Instruments Corporation 4-11 PCI-6110E/6111E User Manual Differential Connections for Ground-Referenced Signal Sources Figure 4-3 shows how to connect a ground-referenced signal source to a channel on the 611X E board. Figure 4-3. Differential Input Connections for Ground-Referenced Signals Differential Connections for Nonreferenced or Floating Signal Sources Figure 4-4 shows how to connect a floating signal source to a channel on the 611X E board. Common-Mode Signal Rejection Considerations Analog Output Signal Connections Digital I/O Signal Connections Page Power Connections Timing Connections Programmable Function Input Connections DAQ Timing Connections SCANCLK Signal EXTSTROBE* Signal TRIG1 Signal TRIG2 Signal Page STARTSCAN Signal CONVERT* Signal Page AIGATE Signal SISOURCE Signal Waveform Generation Timing Connections WFTRIG Signal 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 GPCTR1_UP_DOWN Signal FREQ_OUT Signal Field Wiring Considerations Page Calibration Loading Calibration Constants Self-Calibration External Calibration Page A Specifications PCI-6110E/6111E Analog Input Input Characteristics Accuracy Information Appendix A Specifications 2 0.057% 0.058% 0.059% 1.3 mV 2 mV 0.18 mV 0.0005% 0.98 mV 0.23 mV 5 0.057% 0.058% 0.059% 3 mV 5.1 mV 0.44 mV 0.0005% 2.4 mV 0.58 mV 10 0.11% 0.11% 0.11% 5.7 mV 10 mV 0.88 mV 0.0005% 4.9 mV 1.2 mV PCI-6110E/6111E Accuracy Information National Instruments Corporation A-3 PCI-6110E/6111E User Manual 0.2 0.057% 0.058% 0.059% 0.2 mV 0.39 mV 0.035 mV 0.0005% 0.098 mV 0.046 mV Transfer Characteristics Amplifier Characteristics Dynamic Characteristics Stability Analog Output Output Characteristics Transfer Characteristics Voltage Output Dynamic Characteristics Stability Digital I/O Timing I/O Triggers Analog Trigger Digital Trigger Page B Appendix B Cable Connector Descriptions Figure B-1. 68-Pin 611 E Series Connector Pin Assignments National Instruments Corporation PCI-6110E/6111E User Manual B-2 C Common Questions General Information Installation and Configuration Analog Input and Output Timing and Digital I/O Page Page D Customer Communication Electronic Services Bulletin Board Support FTP Support Telephone and Fax Support Country Telephone Fax Technical Support Form PCI-6110E/6111E Hardware and Software Configuration Form National Instruments Products Other Products Documentation Comment Form Title: Edition Date: Part Number: Mail to: Technical Publications Fax to: Glossary Symbols/Numbers A B C D E F G H I K L M N O P R S T U V W Index Numbers A B C D E F G H I L M N O P Q R S T U V W