background image

Overview

This document explains how to connect to the NI-9474. In this document, the

NI-9474 with screw terminal and the NI-9474 with spring terminal are referred to

inclusively as the NI-9474.

Note

 Before you begin, read the NI-9474 Safety, Environmental, and

Regulatory Information document on 

ni.com/manuals

 and complete the

software and hardware installation procedures in your chassis

documentation.

Note

 The guidelines in this document are specific to the NI-9474. 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.

Safety Guidelines

Caution

 Observe all instructions and cautions in the user documentation.

Using the product in a manner not specified can damage the product and

compromise the built-in safety protection.

Attention

 Suivez toutes les instructions et respectez toutes les mises

en garde de la documentation d'utilisation. L'utilisation du produit de

toute autre façon que celle spécifiée risque de l'endommager et de

compromettre la protection de sécurité intégrée.

Safety Voltages

Connect only voltages that are within the following limits.

Channel-to-COM

30 V DC maximum

© National Instruments

3

NI-9474 Getting Started

Summary of Contents for NI 9474

Page 1: ...NI 9474 Getting Started 2022 07 06...

Page 2: ...nditions for Marine Applications 6 Preparing the Environment 7 NI 9474 Pinout 7 Connecting Digital Devices 8 Increasing Current Drive 9 High Vibration Application Connections 9 I O Protection 10 Power...

Page 3: ...s Refer to the documentation for each component in the system to determine the safety and EMC ratings for the entire system Safety Guidelines Caution Observe all instructions and cautions in the user...

Page 4: ...t gories Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distribution such as...

Page 5: ...injury or death Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not remove modules unless power has been sw...

Page 6: ...mplies with the regulatory requirements and limits for electromagnetic compatibility EMC stated in the product specifications These requirements and limits provide reasonable protection against harmfu...

Page 7: ...ports In addition take precautions when designing selecting and installing measurement probes and cables to ensure that the desired EMC performance is attained Preparing the Environment Ensure that t...

Page 8: ...ignal connection Vsup Voltage supply connection Table 1 NI 9474 Signal Descriptions LED Pattern Indication Solid The channel has been programmed to be in the ON state Off The channel has been programm...

Page 9: ...Each channel of the NI 9474 has a continuous output current of 1 0 A If you want to increase the output current to a device you can connect any number of channels together in parallel For example if...

Page 10: ...circuit occurs the current through DO can exceed the current rating for the power supply and the maximum continuous output current for the NI 9474 If the power supply you are using with the NI 9474 ca...

Page 11: ...es Visit ni com support to find support resources including documentation downloads and troubleshooting and application development self help such as tutorials and examples Visit ni com services to le...

Reviews: