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NI 6345 User Manual

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DAQ X Series
X Series User Manual
NI 632x/634x/635x/636x/637x/638x/639x Devices
X Series User Manual
ni.com/manuals
DeutschFrançais
May 2019
370784K-01

Table of Contents

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NI 6345 Specifications

General IconGeneral
Sampling Rate500 kS/s
Resolution16-bit
Counter/Timer4
Analog Outputs2
Output Range±10 V
Power SupplyUSB powered
Communication InterfaceUSB
Operating Temperature0 °C to 45 °C
Storage Temperature Range-20 to 70 °C

Summary

Getting Started

Safety Guidelines

Guidelines for operating NI 63xx X Series devices and modules safely.

Installation

Steps for installing application software, NI-DAQmx, and hardware.

DAQ System Overview

Programming Devices in Software

Using NI-DAQmx driver software to program measurement devices.

Connector and LED Information

I/O Connector Signal Descriptions

Description of signals found on the I/O connectors. Not all signals are available on all devices.

Analog Input

Analog Input on MIO X Series Devices

Overview of analog input circuitry for MIO X Series devices.

Analog Input Ground-Reference Settings

Description of differential, referenced single-ended, and non-referenced single-ended input settings.

Configuring AI Ground-Reference Settings in Software

Programming AI channels to acquire data with different ground references using software.

Use Low Impedance Sources

Ensuring fast settling times by using signal sources with low impedance.

Analog Input Data Acquisition Methods

Performing analog input measurements using software-timed or hardware-timed acquisitions.

Connecting Floating Signal Sources

Guidance on connecting floating signal sources to the DAQ device.

When to Use Differential Connections with Floating Signal Sources

When to use DIFF input connections for floating signal sources based on signal conditions.

When to Use Non-Referenced Single-Ended (NRSE) Connections with Floating Signal Sources

When to use NRSE input connections for floating signal sources based on signal conditions.

When to Use Referenced Single-Ended (RSE) Connections with Floating Signal Sources

When to use RSE input connections for floating signal sources, highlighting recommendations.

Using Differential Connections for Floating Signal Sources

Detailed instructions for differential connections of floating signal sources with bias resistors.

Using Non-Referenced Single-Ended (NRSE) Connections for Floating Signal Sources

Instructions for NRSE connections of floating signal sources, including bias resistor configurations.

Using Referenced Single-Ended (RSE) Connections for Floating Signal Sources

Instructions for RSE connections of floating signal sources, highlighting potential issues.

Connecting Ground-Referenced Signal Sources

Guidance on connecting ground-referenced signal sources to the DAQ device.

When to Use Differential Connections with Ground-Referenced Signal Sources

When to use DIFF connections for ground-referenced signals based on conditions.

When to Use Non-Referenced Single-Ended (NRSE) Connections with Ground-Referenced Signal Sources

When to use NRSE connections for ground-referenced signals based on conditions.

When to Use Referenced Single-Ended (RSE) Connections with Ground-Referenced Signal Sources

Why RSE connections are not recommended for ground-referenced sources and alternatives.

Analog Input Timing Signals

Overview of analog input timing signals and the flexible timing engine.

AI Sample Clock Signal

Using the AI Sample Clock signal to initiate measurements and configure sources.

AI Convert Clock Signal

Using the AI Convert Clock signal to initiate A/D conversions.

AI Start Trigger Signal

Using the AI Start Trigger signal to begin a measurement acquisition.

AI Reference Trigger Signal

Using AI Reference Trigger to stop a measurement acquisition.

AI Pause Trigger Signal

Using the AI Pause Trigger signal to pause and resume a measurement acquisition.

Getting Started with AI Applications in Software

Using MIO X Series devices for analog input applications and programming.

Analog Input on Simultaneous MIO X Series Devices

Overview of analog input circuitry for Simultaneous MIO X Series devices.

Analog Input Terminal Configuration

Simultaneous MIO X Series devices support only differential input mode.

Analog Input Range

Explanation of input range for Simultaneous MIO X Series devices and its effect on resolution.

Analog Input Triggering

Triggering actions for AI tasks on PXIe-6386/6396 devices.

Differential Connections for Ground-Referenced Signal Sources

Connecting ground-referenced signals to a channel on Simultaneous MIO X Series device.

Differential Connections for Floating Signal Sources

Connecting floating signal sources to a channel on Simultaneous MIO X Series device.

Analog Output

AO Reference Selection

Setting the analog output range by selecting the AO reference voltage.

Analog Output Data Generation Methods

Performing analog output operations using software-timed or hardware-timed generations.

Analog Output Triggering

Start trigger and pause trigger actions supported by analog output.

Analog Output Timing Signals

Summary of analog output timing options provided by the timing engine.

AO Start Trigger Signal

Using AO Start Trigger to initiate a waveform generation.

AO Pause Trigger Signal

Using AO Pause Trigger to mask off samples in a DAQ sequence.

AO Sample Clock Signal

Using AO Sample Clock to initiate AO samples and update DAC outputs.

AO Sample Clock Timebase Signal

Signals that can be routed as the AO Sample Clock Timebase.

Getting Started with AO Applications in Software

Using X Series devices for analog output applications and programming.

Digital I/O

Digital Input Data Acquisition Methods

Acquiring digital input measurements using software-timed or hardware-timed methods.

Hardware-Timed Acquisitions

Acquisition rate controlled by a digital hardware signal (DI Sample Clock).

Digital Input Triggering

Start trigger, reference trigger, and pause trigger actions for digital input.

Digital Waveform Acquisition

Acquiring digital waveforms on Port 0 DIO lines using the DI waveform acquisition FIFO.

DI Sample Clock Signal

Using the DI Sample Clock signal to sample Port 0 terminals.

DI Sample Clock Timebase Signal

Signals that can be routed as the DI Sample Clock Timebase.

DI Start Trigger Signal

Using the DI Start Trigger signal to begin a measurement acquisition.

DI Reference Trigger Signal

Using the DI Reference Trigger signal to stop a measurement acquisition.

DI Pause Trigger Signal

Using the DI Pause Trigger signal to pause and resume a measurement acquisition.

Digital Output Data Generation Methods

Generating digital waveforms using software-timed or hardware-timed methods.

Hardware-Timed Generations

Generation rate controlled by a digital hardware signal.

Digital Output Triggering

Start trigger and pause trigger actions for digital output.

Digital Waveform Generation

Generating digital waveforms on Port 0 DIO lines using the DO waveform generation FIFO.

DO Sample Clock Signal

Using the DO Sample Clock signal to update DO terminals.

DO Sample Clock Timebase Signal

Signals that can be routed as the DO Sample Clock Timebase.

DO Start Trigger Signal

Using the DO Start Trigger signal to initiate a waveform generation.

DO Pause Trigger Signal

Using the DO Pause Trigger signal to mask off samples in a DAQ sequence.

Getting Started with DIO Applications in Software

Using X Series devices for digital I/O applications and programming.

Counters

Counter Timing Engine

Explanation of counter timing engine capabilities and clock source requirements.

Counter Input Applications

List of various counter input applications available on X Series devices.

Pulse-Width Measurement

Measuring the width of a pulse on the Gate input signal.

Pulse Measurement

Measuring high and low time of a pulse on the Gate input signal.

Frequency Measurement

Measuring frequency using counters in several different ways.

Choosing a Method for Measuring Frequency

Selecting the best frequency measurement method based on signal characteristics and accuracy needs.

Position Measurement

Performing position measurements with quadrature encoders or two-pulse encoders.

Two-Signal Edge-Separation Measurement

Measuring time between edges on two signals (Aux and Gate).

Counter Output Applications

List of various counter output applications available on X Series devices.

Pulse Train Generation

Generating trains of pulses with programmable frequency and duty cycle.

Frequency Generation

Generating frequencies using a counter or the frequency generator circuit.

Counter Timing Signals

Features of counter timing signals and their filtering.

Counter n Sample Clock Signal

Using Counter n Sample Clock for sample clocked acquisitions and generations.

Default Counter/Timer Pins

Default NI-DAQmx counter/timer inputs and outputs routed to PFI pins.

Counter Triggering

Arm Start Trigger, Start Trigger, and Pause Trigger actions for counters.

PFI

Using PFI Terminals as Timing Input Signals

Routing external timing signals to X Series functions using PFI terminals.

Digital Routing and Clock Generation

Clock Routing

Overview of the clock routing circuitry of an X Series device.

External Reference Clock

Using an external reference clock to synchronize internal timebases to an external clock.

Synchronizing Multiple Devices

Information on synchronizing multiple X Series devices.

PXI Express Devices

Synchronizing PXI Express devices using PXIe_CLK100 or PXI_STAR.

PCI Express Devices

Synchronizing multiple PCI Express devices using RTSI and PFI buses.

USB Devices

Synchronizing multiple USB devices using PFI bus and initiator device.

Real-Time System Integration (RTSI)

Using RTSI bus for common clock and trigger sharing among multiple devices.

Bus Interface

PCI Express/PXI Express Device Data Transfer Methods

Primary ways to transfer data across the PCI Express and PXI Express buses.

Direct Memory Access (DMA)

Method for fastest data transfer without CPU involvement, using DMA controllers.

USB Device Data Transfer Methods

Primary ways to transfer data across the USB bus.

USB Signal Stream

Method using USB bulk transfers without microcontroller intervention.

Triggering

Triggering with a Digital Source

Generating a trigger on a digital signal by specifying source and edge.

Triggering with an Analog Source

Generating a trigger on an analog signal; refer to device specifications for options.

Analog Trigger Types

Configuring analog trigger circuitry to different triggering modes.

Troubleshooting

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