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in Gas Group IIC hazardous locations, you must use the device in an NI chassis that

has been evaluated as Ex nC IIC T4, Ex IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

Caution

 Transient protection shall be provided that is set at a level not

exceeding 140% of the peak rated voltage value of 85 V at the supply

terminals to the equipment.

Caution

 The system shall only be used in an area of not more than

Pollution Degree 2, as defined in IEC/EN 60664-1.

Caution

 The system shall be mounted in an ATEX/IECEx-certified

enclosure with a minimum ingress protection rating of at least IP54 as

defined in IEC/EN 60079-15.

Caution

 The enclosure must have a door or cover accessible only by the

use of a tool.

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory requirements and limits

for electromagnetic compatibility (EMC) stated in the product specifications. These

requirements and limits provide reasonable protection against harmful interference

when the product is operated in the intended operational electromagnetic

environment.
This product is intended for use in industrial locations. However, harmful

interference may occur in some installations, when the product is connected to a

peripheral device or test object, or if the product is used in residential or

commercial areas. To minimize interference with radio and television reception and

prevent unacceptable performance degradation, install and use this product in strict

accordance with the instructions in the product documentation.
Furthermore, any changes or modifications to the product not expressly approved

by National Instruments could void your authority to operate it under your local

regulatory rules.

ni.com

6

NI-9474 Getting Started

Содержание NI 9474

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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