Description

The NI CFP-DI-304 is a high-density, 32-channel digital input module specifically designed for National Instruments’ Compact FieldPoint distributed I/O system, providing robust industrial-grade discrete signal acquisition capabilities for demanding automation applications. This advanced module serves as a critical interface between digital field devices and the control system, offering reliable monitoring of contact closures, switch statuses, and other binary signals from sensors, limit switches, and control devices. The NI CFP-DI-304 excels in handling both wet (sourced) and dry (contact) discrete signals, making it exceptionally versatile for industrial monitoring applications. Its rugged design incorporates advanced protection against voltage transients, superior noise immunity, and extended operating temperature range, ensuring reliable performance in the most challenging industrial environments.

Engineered with National Instruments’ measurement expertise, this module delivers exceptional reliability and fast response times that capture state changes critical for control and safety interlocking decisions. The NI CFP-DI-304 features software-configurable filtering and debouncing options, providing flexibility to adapt to different signal characteristics without hardware changes. The module seamlessly integrates with the Compact FieldPoint platform, offering built-in signal conditioning, removable screw-terminal connectivity, and hot-swappable capability for maintenance-free operation. With its high channel density, industrial ruggedness, and flexible configuration, the NI CFP-DI-304 represents an optimal solution for distributed digital input applications where reliability, density, and flexibility are essential requirements.

CFP-DI-304 NI

Technical Specifications

Parameter Name	Parameter Value
Product Model	CFP-DI-304
Manufacturer	National Instruments (NI)
Product Type	32-Channel Digital Input Module
Input Channels	32 channels, grouped in 8-channel banks
Input Type	Sinking or sourcing (software configurable)
Input Voltage Range	0-30 VDC
Logic Threshold	0-5 VDC (OFF), 15-30 VDC (ON)
Maximum Input Current	8 mA per channel @ 30 VDC
Response Time	< 100 μs (typical)
Input Filtering	Software configurable (0.1-12.8 ms)
Overvoltage Protection	±30 V continuous
Operating Temperature	-40°C to +70°C
Connection Type	Removable screw terminal blocks
Power Consumption	1.8 W typical
Isolation	500 VAC channel-to-bus (bank isolation)

Main Features and Advantages

The NI CFP-DI-304 delivers exceptional digital input performance through its high channel density and flexible configuration options, enabling efficient monitoring of numerous discrete signals in a compact form factor. The module’s software-configurable input type (sinking or sourcing) allows adaptation to different field wiring schemes without hardware modifications, significantly reducing installation time and potential errors. Advanced programmable filtering provides effective noise rejection while maintaining fast response times, ensuring reliable state detection in electrically noisy industrial environments. Built-in overvoltage protection (±30V continuous) safeguards the module and connected equipment from accidental voltage spikes, while bank isolation (500VAC) prevents cross-channel interference and enhances system reliability.

The rugged industrial design of the NI CFP-DI-304 enables reliable operation in extreme conditions with an extended temperature range (-40°C to +70°C) and robust construction that resists vibration, shock, and electrical interference. The module features hot-swappable capability, allowing for maintenance and replacement without system shutdown when used in appropriate configurations, maximizing operational availability. Individual channel status indicators provide immediate visual feedback for troubleshooting, while the removable screw-terminal blocks simplify wiring and maintenance procedures. The NI CFP-DI-304 seamlessly integrates with NI’s LabVIEW and other programming environments, providing a complete solution for industrial digital input applications with reduced development time through extensive driver support and example code libraries.

Application Field

The NI CFP-DI-304 is extensively deployed across various industries requiring high-density digital input monitoring in distributed or harsh environments. In industrial manufacturing, it is used for multi-point machine status monitoring, production line sequencing, safety interlock systems, and equipment condition monitoring across entire production cells. The automotive industry utilizes this module for assembly line control, robotic workcell monitoring, and automated test equipment requiring numerous discrete status points. Material handling and logistics applications employ the NI CFP-DI-304 for conveyor control systems, sorting equipment monitoring, and warehouse automation with extensive sensor networks.

Process industries use this module for tank level switch monitoring, valve position feedback, pump status indication, and safety system permissives across distributed plant areas. Energy and utilities sector applications include power distribution monitoring, equipment status networks, and facility management systems requiring numerous discrete status points. Building automation systems utilize the NI CFP-DI-304 for security system monitoring, access control status, and environmental control system feedback. Essentially, any application requiring reliable, high-density digital input monitoring in distributed or environmentally challenging locations benefits from the high channel count and robust performance of the NI CFP-DI-304 module within the Compact FieldPoint platform.

CFP-DI-304 NI

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