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NI Manuals
I/O Systems
DAQ M Series
User manual
NI DAQ M Series User Manual
Isolated current input/voltage output devices
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
About this Manual
Conventions
Ni-Daq
NI-Daqmx for Linux
Related Documentation
Labview
NI-Daqmx Base
ANSI C Without ni Application Software
Labwindows ™ /CVI
Measurement Studio
NET Languages Without ni Application Software
Device Documentation and Specifications
Technical Support on the Web
Training Courses
Device Pinouts
Getting Started
Installing NI-Daqmx
Installing Other Software
Installing the Hardware
Device Accessories and Cables
Device Specifications
DAQ Hardware
DAQ System Overview
Daq-Stc2
Calibration Circuitry
Sensors and Transducers
Cables and Accessories
Custom Cabling
Programming Devices in Software
Connector Information
I/O Connector Signal Descriptions
RTSI Connector Pinout
Analog Input
Analog Input Circuitry
Analog Input Range
Connecting Analog Current Input Signals
Method 1
Method 2
Analog Input Ground-Reference Settings
Configuring AI Ground-Reference Settings in Software
Minimize Current Step between Adjacent Channels
Multichannel Scanning Considerations
Use Short High-Quality Cabling
Avoid Scanning Faster than Necessary
Example 1
Example 2
Analog Input Data Acquisition Methods
Buffered
Hardware-Timed Acquisitions
Software-Timed Acquisitions
Analog Input Triggering
Field Wiring Considerations
Non-Buffered
Analog Input Timing Signals
AI Sample Clock Signal
Using an External Source
Using an Internal Source
Other Timing Requirements
Routing AI Sample Clock Signal to an Output Terminal
AI Convert Clock Signal
AI Sample Clock Timebase Signal
Routing AI Convert Clock Signal to an Output Terminal
Using an External Source
Using an Internal Source
Other Timing Requirements
Using a Delay from Sample Clock to Convert Clock
AI Convert Clock Timebase Signal
AI Hold Complete Event Signal
AI Start Trigger Signal
Routing AI Start Trigger to an Output Terminal
Using a Digital Source
AI Reference Trigger Signal
AI Pause Trigger Signal
Routing AI Reference Trigger Signal to an Output Terminal
Using a Digital Source
Getting Started with AI Applications in Software
Routing AI Pause Trigger Signal to an Output Terminal
Analog Output
Analog Output Circuitry
Analog Output Data Generation Methods
Minimizing Glitches on the Output Signal
Software-Timed Generations
Buffered
Hardware-Timed Generations
Non-Buffered
Analog Output Triggering
Connecting Analog Voltage Output Signals
Analog Output Timing Signals
AO Start Trigger Signal
Using a Digital Source
AO Pause Trigger Signal
Routing AO Start Trigger Signal to an Output Terminal
AO Sample Clock Signal
Routing AO Pause Trigger Signal to an Output Terminal
Using a Digital Source
Other Timing Requirements
Routing AO Sample Clock Signal to an Output Terminal
Using an External Source
Using an Internal Source
AO Sample Clock Timebase Signal
Getting Started with AO Applications in Software
Digital Input and Output
I/O Protection
Connecting Digital I/O Signals
Programmable Power-Up States
Getting Started with DIO Applications in Software
Counter Input Applications
Counters
Counting Edges
Single Point (On-Demand) Edge Counting
Buffered (Sample Clock) Edge Counting
Controlling the Direction of Counting
Non-Cumulative Buffered Edge Counting
Buffered Pulse-Width Measurement
Pulse-Width Measurement
Single Pulse-Width Measurement
Period Measurement
Buffered Period Measurement
Single Period Measurement
Semi-Period Measurement
Single Semi-Period Measurement
Buffered Semi-Period Measurement
Frequency Measurement
Method 1-Measure Low Frequency with One Counter
Method 1B-Measure Low Frequency with One Counter (Averaged)
Method 2-Measure High Frequency with Two Counters
Method 3-Measure Large Range of Frequencies Using Two Counters
Choosing a Method for Measuring Frequency
Measurements Using Quadrature Encoders
Position Measurement
Measurements Using Two Pulse Encoders
Single Two-Signal Edge-Separation Measurement
Two-Signal Edge-Separation Measurement
Buffered Two-Signal Edge-Separation Measurement
Counter Output Applications
Simple Pulse Generation
Single Pulse Generation
Single Pulse Generation with Start Trigger
Retriggerable Single Pulse Generation
Continuous Pulse Train Generation
Pulse Train Generation
Frequency Generation
Using the Frequency Generator
Frequency Division
Pulse Generation for ETS
Counter N Source Signal
Counter Timing Signals
Routing a Signal to Counter N Source
Routing Counter N Source to an Output Terminal
Counter N aux Signal
Counter N Gate Signal
Routing a Signal to Counter N aux
Routing a Signal to Counter N Gate
Routing Counter N Gate to an Output Terminal
Counter N A, Counter N B, and Counter N Z Signals
Counter N HW Arm Signal
Routing Counter N Z Signal to an Output Terminal
Routing Signals to A, B, and Z Counter Inputs
Counter N Internal Output and Counter N TC Signals
Frequency Output Signal
Routing Counter N Internal Output to an Output Terminal
Routing Frequency Output to a Terminal
Routing Signals to Counter N HW Arm Input
Default Counter Terminals
Arm Start Trigger
Counter Triggering
Pause Trigger
Start Trigger
Cascading Counters
Counter Filters
Other Counter Features
Prescaling
Duplicate Count Prevention
Example Application that Works Correctly (no Duplicate Counting)
Example Application that Prevents Duplicate Count
Example Application that Works Incorrectly (Duplicate Counting)
When to Use Duplicate Count Prevention
Enabling Duplicate Count Prevention in NI-Daqmx
Synchronization Modes
80 Mhz Source Mode
External Source Mode
Other Internal Source Mode
Pfi
Using PFI Terminals as Timing Input Signals
Connecting PFI Input Signals
Exporting Timing Output Signals Using PFI Terminals
Using PFI Terminals as Static Digital Inputs and Outputs
PFI Filters
I/O Protection
Programmable Power-Up States
Isolation and Digital Isolators
Benefits of an Isolated DAQ Device
Digital Isolation
Reducing Common-Mode Noise
Creating an AC Return Path
Isolated Systems
Non-Isolated Systems
Clock Routing
Digital Routing and Clock Generation
100 Khz Timebase
80 Mhz Timebase
External Reference Clock
10 Mhz Reference Clock
Real-Time System Integration Bus (RTSI)
Synchronizing Multiple Devices
RTSI Connector Pinout
Using RTSI as Outputs
RTSI Filters
Using RTSI Terminals as Timing Input Signals
PXI Clock and Trigger Signals
PXI Triggers
PXI_STAR Filters
Bus Interface
DMA Controllers
PXI and PXI Express
PXI Clock and Trigger Signals
PXI Considerations
Data Transfer Methods
Direct Memory Access (DMA)
Using PXI with Compactpci
Changing Data Transfer Methods between DMA and IRQ
Interrupt Request (IRQ)
Programmed I/O
Triggering
Triggering with a Digital Source
NI 6236 Device Information
NI 6236 Pinout
NI 6236 Accessory and Cabling Options
NI 6236 Specifications
Appendix B Troubleshooting
Analog Input
Counters
Technical Support and Professional Services
Glossary
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