NI 9252 Manuel utilisateur

GETTING STARTED GUIDE

NI 9252

8 AI, ±10 V, 24 bit, 50 kS/s/ch Simultaneous

This document explains how to connect to the NI 9252. In this

document, the NI 9252 with screw terminal and the NI 9252 with

DSUB are referred to inclusively as the NI 9252.

Note Before you begin, complete the software and

hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to

the NI 9252. The other components in the system might

not meet the same safety ratings. Refer to the

documentation for each component in the system to

determine the safety and EMC ratings for the entire

system.

2| ni.com | NI 9252 Getting Started Guide

NI 9252 Pinout

AI0+

AI0-

AI1+

AI1-

AI2+

AI2-

AI3+

AI3-

AI4+

AI5+

AI5-

AI6+

AI6-

AI7+

AI7-

COM

AI4-

AI0-

AI1-

AI2-

AI3-

AI4-

AI5-

AI6-

AI7-

COM

AI0+

AI1+

AI2+

AI3+

AI4+

AI5+

AI6+

AI7+

COM

NI 9252 Getting Started Guide | © National Instruments | 3

Table 1. Signal Descriptions

Signal Description

AI+ Positive analog input signal connection

AI- Negative analog input signal connection

COM Common reference connection to isolated ground

NC No connection

Grounded Differential Connections

Voltage

Source

–

AI+

AI–

COM

NI 9252

4| ni.com | NI 9252 Getting Started Guide

Floating Differential Connections

NI 9252

AI+

AI–

COM

Voltage

Source

1 MΩ

Resistor

–

Connect the negative lead to COM through a 1 MΩ resistor to

keep the signal source within the common-mode voltage range.

The NI 9252 does not read data accurately if the signal source is

outside of the common-mode voltage range.

NI 9252 Getting Started Guide | © National Instruments | 5

Single-Ended Connections

–

AI+

AI–

COM

Voltage

Source

NI 9252

Connect the ground signal to COM to keep the signal source

within the common-mode voltage range.

6| ni.com | NI 9252 Getting Started Guide

Differential Connections with Common Mode

Voltage

Source

–

AI+

AI–

COM

NI 9252

Common

Mode

Voltage

NI 9252 Connection Guidelines

• Make sure that devices you connect to the NI 9252 are

compatible with the module specifications.

• You must use 2-wire ferrules to create a secure connection

when connecting more than one wire to a single terminal on

the NI 9252 with screw terminal.

NI 9252 Getting Started Guide | © National Instruments | 7

Wiring for High-Vibration Applications

If your application is subject to high vibration, NI recommends

that you follow these guidelines to protect connections to the

NI 9252 with screw terminal:

• Use ferrules to terminate wires to the detachable connector.

• Use the NI 9928 backshell kit.

Overvoltage Protection

The NI 9252 provides overvoltage protection for each channel.

Note Refer to the device datasheet on ni.com/manuals

for more information about overvoltage protection.

8| ni.com | NI 9252 Getting Started Guide

Where to Go Next

RELATED INFORMATION

C Series Documentation

& Resources

ni.com/info cseriesdoc

Services

ni.com/services

CompactRIO

Located at ni.com

manuals Installs with the software

CompactDAQ

NI 9252 Datasheet

NI-RIO Help

LabVIEW FPGA Help

NI 9252 Datasheet

NI-DAQmx Help

LabVIEW Help

NI 9252 Getting Started Guide | © National Instruments | 9

Worldwide Support and Services

The NI website is your complete resource for technical support.

At ni.com/support, you have access to everything from

troubleshooting and application development self-help resources

to email and phone assistance from NI Application Engineers.

Visit ni.com/services for information about the services NI offers.

Visit ni.com/register to register your NI product. Product

registration facilitates technical support and ensures that you

receive important information updates from NI.

NI corporate headquarters is located at

11500 North Mopac Expressway, Austin, Texas, 78759-3504. NI

also has offices located around the world. For support in the

United States, create your service request at ni.com/support or

dial 1 866 ASK MYNI (275 6964). For support outside the

United States, visit the Worldwide Offices section of ni.com/

niglobal to access the branch office websites, which provide up-

to-date contact information.

10 | ni.com | NI 9252 Getting Started Guide

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