National Instruments NI 9411 C Series digital input module

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National Instruments · CompactDAQ

NI 9411

The NI 9411 is a six-channel C Series digital input module supporting differential or single-ended signals. In a CompactDAQ chassis, it supports correlated digital measurements, triggering and synchronization.

ManufacturerNational Instruments

ModelNI 9411

Part Number779005-01 · 779005-02

Product TypeC Series digital input module

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Inputs6 digital input channels

Signal configurationDifferential or single-ended

Input delay500 ns maximum

Signal connection15-pin DSUB

Digital inputs6 channels

Input signalingDifferential or single-ended

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Overview

Product overview

Key product information and technical features.

The NI 9411 interfaces industrial switches, transducers and other digital devices to a modular acquisition system. It is an input module, not a standalone embedded controller.

Its inputs share a common reference rather than individual channel isolation. Differential and single-ended wiring use different logic thresholds; consult the connection guide before attaching a device.

The NI 9411 interfaces industrial switches, transducers, and other digital devices with a modular acquisition system. Its six input channels accept differential or single-ended signals; it has no digital output channels.

In CompactDAQ systems, the module supports correlated digital acquisition and counter connectivity. NI also documents CompactRIO counter applications using digital input modules such as the NI 9411, with implementation dependent on the system's programming interface.

Accepts differential and single-ended digital signals.
Supports CompactDAQ counter connections.
Enables correlated measurements, triggering and synchronization in CompactDAQ.
Provides channel-to-earth isolation, with no channel-to-channel isolation.
Six digital input channels supporting differential or single-ended signaling.
Correlated measurements, triggering, and synchronization when installed in a CompactDAQ chassis.
Input mode is determined by signal wiring rather than a software configuration setting.
Channels share a common ground; there is no channel-to-channel isolation.

Verified specifications

Technical data

Verified product specifications.

Digital input channels	6 channels
Input type	Differential or single-ended
Maximum input delay	500 ns
Differential logic high	0.3 to 24 V
Differential logic low	-24 to -0.3 V
Differential common-mode voltage	-7 to 12 V
Single-ended logic high	2 to 24 V
Single-ended logic low	0 to 0.8 V
Input impedance	8.4 kΩ
Channel-to-channel isolation	None
Continuous channel-to-earth isolation	30 V RMS / 42.4 V peak / 60 V DC
Operating temperature	-40 to 70 °C
Input delay time	500 maximum ns
Differential input high range	0.3 to 24 V
Differential input low range	-24 to -0.3 V
Single-ended input high range	2 to 24 V
Single-ended input low range	0 to 0.8 V
Signal connector	15-pin DSUB

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Compatibility

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National Instruments

Manufacturer

CompactDAQ

Modular acquisition platform

NI 9411

C Series digital input module

System integration

CompactDAQ supports correlated digital measurements with this module.

Check the selected chassis and software support before integration; follow the NI 9411 wiring guide.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI-9411 Product PageProduct Page · ni.com

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NI-9411 SpecificationsSpecifications · ni.com

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NI 9411 DatasheetDatasheet · download.ni.com

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NI 9411 Getting Started GuideConnection And Safety Guide · download.ni.com

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NI-9411 Product PageProduct Page · ni.com

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NI-9411 Dimensional DrawingsDimensional Drawings And CAD · ni.com

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NI-9411 Dimensional DrawingsTechnical resource

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Using the NI 9411 Inputs as Differential or Single-EndedTechnical resource

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Using a Digital Module for Counter Input on the CompactRIOTechnical resource

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Is the NI 9411 an embedded controller?

No. It is a six-channel C Series digital input module used within a modular system.

Can I connect differential or single-ended devices?

Yes. The getting started guide provides connection diagrams for both configurations, including encoder wiring.

Does the 500 ns specification describe a sample rate?

NI specifies 500 ns as the maximum input delay. It should not be treated as a system acquisition sample rate.

Does the NI 9411 provide digital outputs?

No. It has six digital input channels and no digital output channels.

How is differential or single-ended operation selected?

Selection is made through wiring, not software. Differential operation uses DIa and DIb. For single-ended operation, wire the positive input and leave the negative input floating, as described by NI.

Does 500 ns describe the complete system acquisition rate?

No. NI specifies 500 ns as the maximum input delay. It describes signal propagation through the input circuitry, rather than establishing the complete chassis-to-software acquisition rate.