NI-9421

Name: NI-9421
Price: 206.0 USD
Availability: InStock

Starting at $206.00

Part number(s):

779002-01

783734-01

779136-01

779136-02

24 V, 8-Channel (Sinking Input), 100 µs C Series Digital Module

Overview

The NI-9421 works with industrial logic levels and signals to connect directly to a wide array of industrial switches, transducers, and devices. Each channel is compatible with 24 V logic levels and has an LED indicating the state of that channel. The NI-9421 offers isolation between the input channels and earth ground.

Included Items

Module
10-position spring terminal plug (NI-9980) (Included only with Spring Terminal module, part number 783734-01)
Safety, Environmental, & Regulatory documentation

Part Numbers (4) Price	779002-01	783734-01	779136-01	779136-02


NI Lead Time	6-7 weeks	6-7 weeks	6-7 weeks	9-10 weeks
Supported Hardware Platform	C Series	C Series	C Series	C Series
Number of Bidirectional Digital Channels	0	0	0	0
Conformal Coated	No	No	No	Yes
Current Flow Direction	Sinking Input	Sinking Input	Sinking Input	Sinking Input
Enclosed	Yes	Yes	Yes	Yes
Digital I/O Logic Levels	12 V#24 V	24 V#12 V	12 V#24 V	24 V#12 V

NI-9421 Accessories and Software

Model (Part Number)
Description
Image
Compatible Part Numbers
SH25F-25M (192568-01)
SH25F-25M-1 25-Pin Female to Male Shielded I/O Cable, 1 m
779136-01, 779136-02
View Product Details
Model (Part Number)
Description
Image
Compatible Part Numbers
NI-9924 (781922-01)
NI 9924 Front-mount terminal block for 25-pin D-Sub Modules
779136-01, 779136-02
View Product Details

Software (2)

Product (Part Number) Description	Recommended use cases
FlexLogger Professional (785748-3501) FlexLogger Professional, Subscription License, Download	Recommended for automated, extensible data logging with NI data acquisition (DAQ) hardware. Automate tests using alarms, triggers, and events, and expand capabilities with plug-ins. Key Features Multichassis synchronization—Synchronize multiple NI chassis for accurate, time-aligned measurements across high channel counts. Logging triggers—Start, stop, or segment data recording automatically based on sensor thresholds or other conditions to capture only what matters. Events—Respond to specific occurrences during a test, such as activating equipment when a condition is met (for example, start cooling fans when temperature exceeds a limit). Automation APIs—Control and monitor FlexLogger from external applications (Python, NI LabVIEW, or NI TestStand), enabling integration into larger automated test systems. Calculation channels—Perform real-time math on acquired data (averages, RMS, custom formulas) to track derived measurements as the test runs. Plug-ins—Extend FlexLogger with custom LabVIEW or Python plug-ins to integrate third-party hardware, perform custom analysis, or connect to lab systems. CAN/LIN logging—Acquire and log automotive network data alongside sensor measurements for complete vehicle or subsystem testing.	View Product Details
LabVIEW+ Suite (788509-35) NI LabVIEW+ Suite, Subscription License, Download	Recommended for engineers building full test and validation systems where modular code development and higher-level frameworks are needed to accelerate development for shorter time to market. The LabVIEW+ Suite includes the following products: NI LabVIEW—Provides a graphical programming environment for test system development, enabling connectivity to any instrument and fully integrated user interfaces. NI TestStand—Eliminates the need for time-intensive in-house sequencer development and maintenance by providing an off-the-shelf test management software for validation and production test. NI DIAdem—Saves engineers hundreds of hours of manual data analysis and report creation with automation. NI FlexLogger™ software—Simplifies data acquisition and data logging with interactive measurement setup for NI DAQ hardware. NI InstrumentStudio™ software—Provides a central location for configuration, measurement, and automation.	View Product Details