Description
The NI-9421 is a C Series Digital I/O module, designed for a wide array of applications requiring high-speed digital input. It features 8 digital input channels that can handle 24 V signals with a response time of 100 us. This module is particularly noted for its sinking inputs, making it suitable for various industrial automation tasks.
Part numbers associated with the NI-9421 include 779002-01, 779136-01, 779136-02, and 783734-01. These part numbers indicate slight variations in the module’s specifications, such as channel-to-earth ground isolation. The 779002-01 and 783734-01 models offer an isolation of 250 Vrms, while the 779136-01 and 779136-02 models provide 60 VDC isolation. Additionally, the 779136-02 model is conformal coated, offering enhanced protection against harsh environments.
Its compatibility with 12V and 24V digital I/O logic levels allows for flexible integration into various system designs. The module’s power consumption is efficient, with an active usage of up to 240 mW and a sleep mode that requires no more than 7 mW. Weighing in at 5.1 oz, the NI-9421 is both lightweight and compact, ensuring it does not add significant bulk or weight to the system.
The module is designed to operate in a wide range of environmental conditions, with an operating temperature range of -40 °C to 70 °C and a storage temperature range of -40 °C to 85 °C. Its humidity range, for both operating and storage conditions, ensures reliable performance in diverse climates and conditions.
In summary, the NI-9421 stands out as a robust, high-performance digital I/O module, making
| 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 |
| Input Channels | 8 digital input channels |
| Input Type | Sinking Inputs |
| Logic Levels | 12V, 24V digital I/O |
| Ch-Earth Ground Isolation | 250 Vrms (779002-01, 783734-01), 60 VDC (779136-01, 779136-02) |
| Conformal Coated | Yes (779136-02 only) |
| Power Consumption | Active: up to 240 mW, Sleep mode: 7 mW max |
| 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) | Operating:
Question 1: What is the logic level of the NI-9421? Question 2: How many input channels does the NI-9421 have? Question 3: What is the ground isolation of 779002-01 for NI-9421? Question 4: What is the response time for the NI-9421 input channels? Question 5: Does the 779136-02 model of NI-9421 have conformal coating? |
