Description
The NI-9421 is a module within the C Series Digital I/O category, designed for various applications requiring digital input. This model, recognized by its part numbers 779002-01, 779136-01, 779136-02, and 783734-01, is equipped with 8 digital input channels. It is adept at handling 8-Ch 24 V, 100 us, Sinking DI operations, making it suitable for a wide range of industrial applications.
The NI-9421 supports logic levels that are compatible with 12V, 24 V digital I/O, providing flexibility in connecting with various types of digital devices. Its isolation specifications are notable, offering 250 Vrms Ch-Earth Ground for the part numbers 779002-01 and 783734-01, and 60 VDC Ch-Earth Ground for the part numbers 779136-01 and 779136-02, ensuring safety and reliability in electrically noisy environments.
An interesting feature of the NI-9421 is its conformal coating, which is exclusive to part number 779136-02. This coating enhances its durability and resistance to harsh environmental conditions, making it an ideal choice for applications exposed to moisture or chemical vapors.
In terms of power efficiency, the module’s power consumption is active: up to 240 mW, with a sleep mode power draw of 7 mW max, highlighting its energy efficiency. The operating temperature range of -40 °C to 70 °C and storage temperature range of -40 °C to 85 °C ensure the module’s functionality in extreme conditions. Furthermore, the module can operate within a humidity range of 10% RH to 90% RH (non-condensing), and has a storage humidity tolerance of 5% RH to 95% RH (non-condensing), ensuring reliable performance in varying environmental conditions.
| Specification | Details |
|---|---|
| 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 |
| Input Channels | 8 digital input channels |
| Logic Levels | Compatible with 12V, 24 V digital I/O |
| Isolation | 250 Vrms Ch-Earth Ground (779002-01, 783734-01), 60 VDC Ch-Earth Ground (779136-01, 779136-02) |
| Conformal Coated | Yes (779136-02 only) |
| Power Consumption | Active: up to 240 mW, Sleep mode: 7 mW max |
| Operating Temperature Range | -40 °C to 70 °C |
| Storage Temperature Range | -40 °C to 85 °C |
| Operating Humidity Range | 10% RH to 90% RH (non-condensing) |
| Storage Humidity Range | 5% RH to 95% RH (non-condensing) | Question 1: What are the logic levels of NI-9421?
