Description
The NI-9421 is a model belonging to the C Series Digital I/O category, designed specifically for applications requiring high-quality digital input solutions. This module comes with 8 digital input channels, making it versatile for various digital input tasks. It operates on a 24VDC Sinking input type, ensuring compatibility with a wide range of industrial sensors and devices.
The NI-9421 is available under several part numbers, including 779002-01, 779136-01, 779136-02, and 783734-01, each tailored to meet specific isolation, connector, and coating requirements. Specifically, the isolation ratings are 250 Vrms Ch-Earth Ground for part numbers 779002-01 and 783734-01, and 60 VDC Ch-Earth Ground for part numbers 779136-01 and 779136-02. Notably, the 779136-02 variant is exclusively equipped with a conformal coating for additional protection in harsh environments.
When it comes to power consumption, the module is designed to be energy efficient, with an active power usage of up to 240 mW and a sleep mode consumption of up to 7 mW. This makes it an ideal choice for systems where power efficiency is a priority. The NI-9421 accommodates different types of connectors, including screw terminals (part number 779002-01), D-Sub connectors (part numbers 779136-01 and 779136-02), and spring terminals (part number 783734-01), providing flexibility in wiring and connectivity options.
With a weight of 5.1 oz, this module is lightweight yet robust enough to withstand harsh industrial environments. It operates reliably over a wide temperature range, from -40 °C to 70 °C for operating conditions and -40 °C to 85 °C for storage, ensuring performance stability in extreme conditions.
| Specification | Detail |
|---|---|
| Part Numbers | 779002-01, 779136-01, 779136-02, 783734-01 |
| Category | C Series Digital I/O |
| Model | NI-9421 |
| Description | 8-CH 24VDC Sinking Digital Input Module |
| Channels | 8 digital input channels |
| Input Type | Sinking |
| Isolation | 250 Vrms Ch-Earth Ground (779002-01, 783734-01), 60 VDC Ch-Earth Ground (779136-01, 779136-02) |
| Conformal Coating | Yes (779136-02 only) |
| Power Consumption | Active: up to 240 mW, Sleep: up to 7 mW |
| Connectors | Screw terminals (779002-01), D-Sub (779136-01, 779136-02), Spring Terminal (783734-01) |
| Weight | 5.1 oz |
| Operating Temperature | -40 °C to 70 °C |
| Storage Temperature | -40 °C to 85 °C |
