National Instruments NI PXI-4224 About the NI PXI-4224

© National Instruments Corporation 1-1 NI PXI-4224 User Manual

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About the NI PXI-4224

This chapter provides an introduction to the NI PXI-4224 device and its

installation.

The NI PXI-4224 is part of the NI PXI-4200 series of data acquisition

(DAQ) devices with integrated signal conditioning. The PXI-4200 series

reduces measurement setup and configuration complexity by integrating

signal conditioning and DAQ on the same product.

The NI PXI-4224 is an 8-channel isolated analog input device with a ±10 V

input range. It allows isolated analog measurements directly on the PXI

platform.

The NI PXI-4224 has the following characteristics:

• Each channel has a gain of either 1 or 10.

• An isolation rating of 42.4 Vpeak or 60 VDC, Category I.

• The front connector is a 25-pin D-SUB connector, with 16 pins for

analog input.

Signal connections are made through a TB-2725 terminal block that

provides connections for all eight analog input channels. You can

optionally connect a standard 25-pin D-SUB cable to the device and cable

it as needed for your application.

Note Go to ni.com/products to determine if newly developed terminal blocks are

available.

You can configure most settings on a per-channel basis through software.

The NI PXI-4224 is configured using Measurement & Automation

Explorer (MAX) or through function calls to NI-DAQmx.

Note The NI PXI-4224 is supported in NI-DAQmx only.

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Conventions Contents Page Figures Tables About the NI PXI-4224 What You Need to Get Started National Instruments Documentation Installing the Application Software, NI-DAQ, and the DAQ Device Installing the NI PXI-4224 LED Pattern Descriptions Connecting Signals Connecting Signals to the NI PXI-4224 Front Signal Connector Page Analog Input Connections Page Figure 2-3. Unshielded Grounded Signal Source Connection Using a D-SUB Connector Figure 2-4. Shielded Floating Signal Source Connection Using a D-SUB Connector Figure 2-5. Shielded Grounded Signal Source Connection Using a D-SUB Connector Figures 2-6 through 2-9 illustrate connecting signals using a terminal block. Figure 2-6. Unshielded Floating Signal Source Connection Using a Terminal Block Figure 2-7. Unshielded Grounded Signal Source Connection Using a Terminal Block Figure 2-8. Shielded Floating Signal Source Connection Using a Terminal Block Floating Signal Source Connection Ground-Referenced Signal Connection Shielded Ground-Referenced Signal Connection (Recommended) Configuring and Testing Verifying and Self-Testing the Signals Using Test Panels Configuring the NI PXI-4224 in MAX Creating a Voltage Task or Global Channel Using NI-DAQmx Verifying and Self-Testing an NI-DAQmx Task or Global Channel Page Chapter 4 Theory of Operation Figure 4-1. Block Diagram of NI PXI-4224 NI PXI-4224 User Manual 4-2 ni.com Signal Conditioning Functional Overview Measurement Considerations Input Impedance Common-Mode Rejection Ratio Effective CMR Timing and Control Functional Overview Programmable Function Inputs Device and PXI Clocks Figure 4-4 shows this signal connection scheme. Figure 4-4. NI PXI-4224 PXI Trigger Bus Signal Connection Page Using the NI PXI-4224 Developing Your Application Typical Program Flow Chart Figure 5-1. Typical Program Flowchart Overview of Typical Flow Chart Creating a Task Using DAQ Assistant or Programmatically Adjusting Timing and Triggering Configuring Channel Properties Acquiring, Analyzing, and Presenting Completing the Application Developing an Application Using LabVIEW Page Using a DAQmx Channel Property Node in LabVIEW Synchronization and Triggering Synchronizing the NI PXI-4224 Figure 5-2. General Synchronizing Flowchart Synchronizing the NI PXI-4224 Using LabVIEW Other Application Documentation and Material Calibrating the NI PXI-4224 Loading Calibration Constants Self-Calibration External Calibration A Specifications Overvoltage Protection Analog Input Accuracy Transfer Characteristics Calibration Pre-Calibration Errors Memory Digital Triggers PXI Trigger Bus PCI Bus Interface Power Requirements Physical Maximum Working Voltage Isolation Voltages Environmental Safety Electromagnetic Compatibility CE Compliance Online Product Certification Environmental Management RoHS B Timing Signal Information Connecting Timing Signals Programmable Function Input Connections DAQ Timing Connections AI START TRIG Signal AI REF TRIG Signal AI SAMP CLK Signal Page AI CONV CLK Signal AI PAUSE TRIG Signal AI SAMPLE CLK TIMEBASE Signal AI HOLD COMPLETE Signal C Removing the NI PXI-4224 Removing the NI PXI-4224 from a PXI or PXI/SCXI Combination Chassis Removing the NI PXI-4224 from MAX D Common Questions Page Glossary Symbols A B C D E F G H I K L M N O P R S T V Page Index A B C D E F G H I L O P Q R S T V