Description
The NI-9421 is a model from the C Series Digital I/O category, featuring a variety of part numbers including 779002-01, 779136-01, 779136-02, and 783734-01. This module is designed to offer a robust solution for digital input applications, as it comes equipped with spring terminals and supports 8-CH 24VDC sinking digital input channels. The input type is specifically sinking, making it suitable for various industrial applications.
It is compatible with 12V and 24V digital I/O logic levels, ensuring versatility across different platforms and systems. The NI-9421 offers channel to earth ground isolation, with 250 Vrms for part numbers 779002-01 and 783734-01, and 60 VDC for part numbers 779136-01 and 779136-02. Notably, the part number 779136-02 is also conformal coated, offering additional protection in harsh environments.
When it comes to power consumption, the module is quite efficient, consuming up to 240 mW when active and just up to 7 mW in sleep mode. It is designed to operate in a wide range of temperatures, from -40 °C to 70 °C, and can be stored in temperatures ranging from -40 °C to 85 °C. The operating humidity tolerance is 10% RH to 90% RH (non-condensing), and for storage, it is from 5% RH to 95% RH (non-condensing), ensuring reliability in varying environmental conditions.
The module is also built to withstand operating vibrations, supporting random vibrations of 5 grms and sinusoidal vibrations of 5 g (from 10 to 500 Hz). With a weight of 5.1 oz, the NI-9421 combines lightweight design with durable construction, making it an ideal choice for a wide range of digital input tasks.
| Specification | Detail |
|---|---|
| Part Numbers | 779002-01, 779136-01, 779136-02, 783734-01 |
| Category | C Series Digital I/O |
| Model | NI-9421 |
| Description | Spring Terminal, 8-CH 24VDC Sinking Digital Input Module |
| Channels | 8 digital input channels |
| Input Type | Sinking Inputs |
| Logic Levels Compatibility | 12V, 24V digital I/O |
| Channel to 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: up to 7 mW |
| Recommended Operating Temperature | -40 °C to 70 °C |
| Storage Temperature | -40 °C to 85 °C |
| Operating Humidity | 10% RH to 90% RH (non-condensing) |
| Storage Humidity | 5% RH to 95% RH (non-condensing) |
| Operating Vibrations | Random: 5 grms, Sinusoidal: 5 g (10 to 500 Hz) |
| Weight | 5.1 oz |
Question 1: What type of inputs does the NI-9421 support?
Answer 1: It supports 8 sinking digital input channels.
Question 2: What is the maximum operating temperature for the NI-9421?
Answer 2: The NI-9421 can operate up to 70 °C.
Question 3: How much power does the NI-9421 consume when active?
Answer 3: It consumes up to 240 mW in active mode.
Question 4: Does the NI-9421 have channel to earth ground isolation?
Answer 4: Yes, up to 250 Vrms for part numbers 779002-01 and 783734-01.
Question 5: Is there a conformal coated version of the NI-9421?
Answer 5: Yes, part number 779136-02 is conformal coated.
