189197F-01L

Description

The NI-9421 is a versatile component belonging to the C Series Digital I/O category, designed to accommodate various industrial applications requiring reliable digital input functionality. This module is identified by several part numbers, including 779002-01, 779136-01, 779136-02, and 783734-01, catering to a wide range of customer needs and specifications.

With its capability to handle 8 digital input channels, the NI-9421 excels in collecting digital signals in environments where precision and speed are crucial. It operates efficiently with 24 V logic levels, ensuring compatibility with a broad spectrum of industrial sensors and switches. The module is specifically engineered for rapid signal processing, boasting an impressive response time of 100 us for sinking DI (Digital Input) signals, making it an ideal choice for high-speed monitoring applications.

One of the standout features of the NI-9421 is its varied isolation ratings, which safeguard the module and connected devices against electrical noise and transient voltages. Models 779002-01 and 783734-01 offer an isolation of 250 Vrms from channel to earth ground, while models 779136-01 and 779136-02 provide a lower isolation level of 60 VDC, allowing users to select the model that best fits their operational safety requirements.

Additionally, the model 779136-02 is conformal coated, offering enhanced protection against moisture, dust, chemicals, and temperature extremes, further extending the module’s operational reliability and lifespan in harsh industrial environments.

In terms of power efficiency, the NI-9421 is designed to be economical, consuming up to 240 mW of power during active operations and reducing down to up to 7 mW in sleep mode, thereby supporting energy-conserving applications.

The module accommodates various connectivity options, including screw terminals (model 779002-01), D-Sub connectors (models 779136-01, 779136-02), and spring terminals 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 Logic Levels 12V, 24 V digital I/O Isolation (Ch-Earth Ground) 250 Vrms (779002-01, 783734-01), 60 VDC (779136-01, 779136-02) Conformal Coated Yes (779136-02) 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 Range -40 °C to 70 °C Storage Temperature Range -40 °C to 85 °C

Question 1: How many digital input channels does the NI-9421 have?
Answer 1: 8 channels