Description
The NI-9421 falls under the C Series Digital I/O category and is designed to meet a wide range of digital input needs. This model comes with various part numbers including 779002-01, 779136-01, 779136-02, and 783734-01, each tailored to specific requirements and environments.
It features 8 digital input channels that operate with sinking inputs, making it versatile for different digital logic systems. The NI-9421 is capable of handling 12V and 24V digital I/O logic levels, ensuring compatibility with a broad spectrum of industrial sensors and switches.
A key aspect of the NI-9421 is its channel-earth ground isolation, which varies depending on the part number. For part numbers 779002-01 and 783734-01, the isolation is rated at 250 Vrms, while for part numbers 779136-01 and 779136-02, it is 60 VDC. This feature enhances safety and reliability by preventing electrical noise and transient voltage spikes from affecting the performance.
The model marked with part number 779136-02 is conformal coated, offering additional protection against harsh environments, including exposure to moisture, dust, chemicals, and temperature extremes. This coating extends the durability and lifespan of the module, making it an ideal choice for rugged applications.
Despite its robust features, the NI-9421 maintains low power consumption, requiring up to 240 mW in active mode and up to 7 mW in sleep mode, highlighting its efficiency in energy use. The module supports various connector types, including screw terminals (part number 779002-01), D-Sub (part numbers 779136-01, 779136-02), and spring terminal (part number 783734-01), offering flexibility in
| Specification | Details |
|---|---|
| Part Numbers | 779002-01, 779136-01, 779136-02, 783734-01 |
| Category | C Series Digital I/O |
| Model | NI-9421 |
| Digital Input Channels | 8 |
| Input Type | Sinking Inputs |
| Logic Levels | 12V, 24 V digital I/O |
| Channel-Earth Ground Isolation | 250 Vrms (Part Numbers: 779002-01, 783734-01), 60 VDC (Part Numbers: 779136-01, 779136-02) |
| Conformal Coated | Yes (Part Number: 779136-02) |
| Power Consumption | Active: up to 240 mW, Sleep Mode: up to 7 mW |
| Connector Types | Screw Terminals (779002-01), D-Sub (779136-01, 779136-02), Spring Terminal (783734-01) |
| Weight | 5.1 oz |
| Operating Temperature Range | -40 °C to 70 °C |
| Storage Temperature Range | -40 °C to 85 °C |
