NI 9421 8-channel digital input module

Product Description

The NI 9421 is a versatile 8-channel digital input module designed specifically for use with National Instruments' CompactDAQ or CompactRIO chassis. It's engineered to directly interface with a wide array of industrial switches, transducers, and devices, making it a valuable tool for data acquisition and control systems in various industries.  

Key Features and Specifications

• 8 Channels: Supports 8 independent digital input channels.

   

• Sinking Input: Each channel operates in a sinking configuration, providing a common ground for connected devices.

   

• Industrial Compatibility: Works with industrial logic levels and signals, making it suitable for harsh environments.

   

• Isolation: Offers channel-to-earth ground isolation for enhanced noise immunity.

   

• Timing: Provides a 100 µs update rate for real-time data acquisition.

   

• LED Indicators: Each channel has an LED indicator to visually confirm its status.

Advantages

• Versatility: The NI 9421 can be used in a wide range of applications, from simple data logging to complex control systems.

• Reliability: Its robust design and industrial compatibility ensure reliable operation in demanding environments.

• Ease of Use: The module integrates seamlessly with NI software, making configuration and programming straightforward.

• Compact Size: Its compact form factor allows for easy integration into various systems.

• Scalability: Multiple NI 9421 modules can be combined to expand the number of input channels.

Precautions

• Voltage: Ensure that the input voltage is within the specified range to avoid damage.

• Wiring: Proper wiring is crucial for correct operation. Refer to the datasheet for specific wiring instructions.

• Environment: Avoid exposing the module to excessive temperature, humidity, or vibration.

• Grounding: Proper grounding is essential for noise reduction and safety.

Applications

The NI 9421 finds applications in various industries, including:

• Test and Measurement: Acquiring digital signals from sensors and instruments.

• Industrial Automation: Monitoring machine status and controlling processes.

• Data Acquisition: Collecting data for analysis and visualization.

• Research and Development: Prototyping and developing custom measurement systems.

Additional Information

• Compatibility: The NI 9421 is compatible with a wide range of NI software, including LabVIEW, LabWindows/CVI, and Measurement Studio.

• Customization: The module can be customized using NI-DAQmx software to meet specific application requirements.

• Support: National Instruments provides comprehensive documentation and support for the NI 9421.

   

For more detailed information and specific product recommendations, please refer to the National Instruments website or consult with a NI authorized distributor.