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Special Conditions for Marine Applications

Some products are approved for marine (shipboard) applications. To verify marine

approval certification for a product, visit 

ni.com/product-certifications

, search by

model number, and click the appropriate link.

Notice

 In order to meet the EMC requirements for marine applications,

install the product in a shielded enclosure with shielded and/or filtered

power and input/output 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 the environment in which you are using the NI-9474 meets the following

specifications.

Operating temperature (IEC 60068-2-1, IEC 60068-2-2)

-40 °C to 70 °C

Operating humidity (IEC 60068-2-78)

10% RH to 90% RH, noncondensing

Pollution Degree

2

Maximum altitude

2,000 m

Indoor use only.

Note

 Refer to the device datasheet on 

ni.com/manuals

 for complete

specifications.

NI 9474 Pinout

© National Instruments

7

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...

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