Description
The NI-9421 is a versatile module in the C Series Digital I/O category, designed to meet a wide range of automation and control needs. This module is equipped with 8 digital input channels that support sinking inputs, making it suitable for various industrial applications. The NI-9421 is characterized by its ability to handle 24 V logic levels, ensuring compatibility with a broad spectrum of digital signals.
Regarding its specifications, the NI-9421 offers an impressive input response time of 100 microseconds, enabling rapid detection and response to input signals. This module is designed to work efficiently with a power consumption of up to 240 mW when active, and a maximum of 7 mW in sleep mode, thereby ensuring energy efficiency in prolonged operations.
The module’s robust design includes isolation features that enhance its safety and reliability. Specifically, certain models (779002-01, 783734-01) provide up to 250 Vrms channel-to-earth ground isolation, while others (779136-01, 779136-02) offer 60 VDC channel-to-earth ground isolation. Additionally, the part number 779136-02 is conformal coated, offering extra protection against environmental factors.
With a weight of 5.1 ounces, the NI-9421 is lightweight yet durable, capable of operating in a wide temperature range from -40 °C to 70 °C and can be stored in temperatures ranging from -40 °C to 85 °C. Its design is also optimized to withstand a humidity range that spans both operating and storage conditions, further underscoring its reliability in harsh environments.
The NI-9421’s part numbers include 779002-01, 779136-01, 779136-02, and 783734-01, offering a selection of models to cater to specific isolation and protective coating requirements. This diversity ensures that users can select the most appropriate version of the NI-
| Specification | Detail |
|---|---|
| Part Numbers | 779002-01, 779136-01, 779136-02, 783734-01 |
| Category | C Series Digital I/O |
| Model | NI-9421 |
| Description | 8-Ch 24 V, 100 us, Sinking DI Module |
| Channels | 8 digital input channels |
| Input Type | Sinking Inputs |
| Logic Levels | 12V, 24 V digital I/O |
| Isolation | 250 Vrms Ch-Earth Ground Isolation (779002-01, 783734-01), 60 VDC Ch-Earth Ground Isolation (779136-01, 779136-02) |
| Conformal Coated | Yes (Part Number 779136-02) |
| Power Consumption | Up to 240 mW active, 7 mW max in sleep mode |
| Weight | 5.1 oz |
| Operating Temperature Range | -40 °C to 70 °C |
| Storage Temperature Range | -40 °C to 85 °C |
| Humidity Range (Operating and Storage) | Question 1: What is the input voltage for NI-9421?
