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National Instruments NI 6013, NI 6014 Differential Connections for Ground-Referenced Signal Sources

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Chapter4 ConnectingSignals

©NationalInstruments Corporation 4-11 NI6013/6014 User Manual

Differential Connections for Ground-ReferencedSignal Sources

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

ach annel on the device configured in DIFF input mode.

Figure4-4. DifferentialInput Connections for Ground-Referenced Signals

Withthis type of connection, the PGIA rejects both the common-m ode

noise in the signal and the ground potential difference between the signal

sourcean d the deviceground, shownas Vcm in Figure 4-4.

SelectedChannel in DIFF Configuration

PGIA

–

Vcm

Ground-

Referenced

Signal

Source

Common-

Mode

Noiseand

Ground

Potential

I/OConnector

AIGND

AISENSE

InputMultiplexers

VmMeasured

Voltage

Instrumentation

Amplifier

ACH+

ACH–

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Compliance FCC/Canada Radio Frequency Interference Compliance Determining FCC Class FCC/DOC Warnings Class A Compliance to EU Directives Contents Chapter 4 Connecting Signals Page About This Manual Conventions Used in This Manual Related Documentation Introduction About the NI 6013/6014 Device What You Need to Get Started Software Programming Choices NI-DAQ National Instruments ADE Software Optional Equipment Unpacking Safety Information Page Page Installing and Configuring the NI 6013/6014 Installing the Software Installing the Hardware Configuring the Hardware Page NationalInstruments Corporation 3-1 NI6013/6014 User Manual Hardware Overview DAQ- STC PCI Connector This chapter presents an overview of the hardware functions on the NI 6013/6014. I/O Connector Analog Input Input Mode Input Range Scanning Multiple Channels Analog Output Analog Output Glitch Digital I/O Timing Signal Routing Programmable Function Inputs Connecting Signals I/O Connector Figure4-1. I/OConnector Pin Assignment for the NI 6013/6014 Table4-2. SignalDescriptions for I/O Connector Pins Table4-2. SignalDescriptions for I/O Connector Pins (Continued) Table4-3. I/OSignal Summary for the NI 6013/6014 Table4-2. SignalDescriptions for I/O Connector Pins (Continued) Analog Input Signal Overview Table4-3. I/OSignal Summary for the NI 6013/6014 (Continued) Types of Signal Sources Floating Signal Sources Ground-Referenced Signal Sources Analog Input Modes Page Connecting Analog Input Signals Figure4-3. Summary of AI Connections Differential Connection Considerations Differential Connections for Ground-Referenced Signal Sources Figure4-4. DifferentialInput Connections for Ground-Referenced Signals Differential Connections for Nonreferenced or Floating Signal Sources Figure4-5. DifferentialInput Connections for Nonreferenced Signals Page Single-Ended Connection Considerations Single-Ended Connections for Floating Signal Sources Single-Ended Connections for Grounded Signal Sources Common-Mode Signal Rejection Considerations Connecting Analog Output Signals Connecting Digital I/O Signals Power Connections Connecting Timing Signals Programmable Function Input Connections DAQ Timing Connections TRIG1 Signal TRIG2 Signal Page STARTSCANSignal Page CONVERT* Signal AIGATE Signal SISOURCE Signal SCANCLK Signal EXTSTROBE* Signal Waveform Generation Timing Connections WFTRIGSignal 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 Page FREQ_OUT Signal Field Wiring Considerations Page Calibration Loading Calibration Constants Self-Calibration External Calibration A Specifications Analog Input Input Characteristics Accuracy Information TransferCharacteristics Amplifier Characteristics Dynamic Characteristics Stability Analog Output Output Characteristics Accuracy Information TransferCharacteristics Voltage Output Dynamic Characteristics Stability Digital I/O DIO<0..7> Timing I/O Page Maximum Working Voltage Environmental Safety Electromagnetic Compatibility B Custom Cabling and Optional Connectors Custom Cabling Optional Connectors FigureB-1. 68-PinConnector Pin Assignments ACH8 ACH9 ACH10 ACH11 ACH12 Common Questions General Information Installing and Configuring the Device Analog Input and Output Page Page Timing and Digital I/O Page D Technical Support and Professional Services Glossary Symbols A B C D E F G H I K L M N O P Q 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