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NI 9403

C Series 32-Ch, 5 V/TTL Bidirectional Digital I/O Module

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  • 32-channel digital I/O module for NI CompactDAQ or CompactRIO
  • 5 V/TTL, sinking/sourcing digital I/O
  • Bidirectional, configurable by line with shift-on-the-fly capability
  • 1000 Vrms transient isolation, ±30 V overvoltage protection
  • Hot-swappable operation
  • -40 to 70 °C operating range


The National Instruments 9403 is a 32-channel, 7 μs bidirectional digital input/output module for any NI CompactDAQ or CompactRIO chassis. You can configure the direction of each digital line on the NI 9403 for input or output. Each channel is compatible with 5 V/TTL signals and features 1,000 Vrms transient isolation between the I/O channels and the backplane. The NI 9403 also features ±30 V overvoltage protection and can source up to 2 mA output current per channel.

When used in an NI CompactDAQ chassis, the NI 9403 can be used as only a static (software-timed) digital input/output module. Starting in DAQmx 9.3, the NI 9403 can be used in buffered tasks for a single direction (either input or output). Due to the serial transfer of data, these modules cannot be used to route timing or triggering signals.With the NI 9403 in a CompactRIO chassis, you can use LabVIEW FPGA to program the NI 9403 for implementing custom counter/timers, pulse generation, and much more.

The NI 9923 (or other 37-pin D-Sub connector) is required for use with the NI 9403 module.

Specifications Documents

View Data Sheet

Specifications Summary

General
Product Name NI 9403
Product Family Digital I/O
Form Factor CompactDAQ , CompactRIO
Part Number 780179-01 , 779787-01
Operating System/Target Real-Time , Windows
Measurement Type Digital
Isolation Type Ch-Earth Ground Isolation
RoHS Compliant Yes
Digital I/O
Bidirectional Channels 32
Timing Software , Hardware
Maximum Clock Rate 140 kHz
Logic Levels TTL , 5 V
Input Current Flow Sinking
Output Current Flow Sinking , Sourcing
Counter/Timers
Counters 0
Physical Specifications
Length 9 cm
Width 2.3 cm
I/O Connector 37-pin D-Sub
Minimum Operating Temperature -40 °C
Maximum Operating Temperature 70 °C
Minimum Storage Temperature -40 °C
Maximum Storage Temperature 85 °C

NI 9403 Packages

To use the NI 9403 , you need all items in the diagram below. Select Option 1 if you already own a C Series System, or Option 2 if you do not already own a chassis, controller, or software.

Roll over the icons below to learn why you need each item in the system

C Series System
1 Terminal Block NI 9403 Chassis PC/Controller Software
NI 9403 and Accessories Only
NI 9403
779787-01 Qty $ 393 each
780179-01 Qty $ 555 each

Required Accessories
Terminal Block -
Qty $ 134 each

Package Price: $ 527
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Select a Platform and Configure a System
Create a complete system with the NI 9403 and its accessories. However, the NI 9403 is compatible with multiple C Series Platforms, NI CompactDAQ and CompactRIO. Please review the comparison information below and select a platform to begin configuring your system.
Configure System Configure System
NI CompactDAQ CompactRIO
video
video
Mixed-Measurements

Customizable with a variety of chassis and module types.
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Deterministic & Rugged

Time-Critical Control & Monitoring
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Features NI CompactDAQ CompactRIO
USB, Wi-Fi, Ethernet Ethernet
-20 to 50 C -40 to 70 C
LabVIEW, C, C++, VB.NET, C#.NET LabVIEW, LabVIEW RT, LabVIEW FPGA only
PC Based Headless Embedded Controller (Standalone or network)
Laboratory - 30 g shock and 0.3 grms operational vibration Field Work - 50 g shock (Class I, Div 2 for Hazardous Locations)
Since your device does not have direct signal connectivity, you need a terminal block to act as an interface between your sensors/signals and your device. A terminal block provides easy access to the inputs and outputs of your hardware.
The chassis provides rugged, modular housing for your controller (if using CompactRIO) and C Series modules. A high-performance backplane in the chassis contains the system's data, timing, and triggering buses.
The controller runs your application and interfaces with your C Series modules. If you are using the NI CompactDAQ platform, then a Personal Computer (PC) will act as the controller of your system. However, if the CompactRIO platform is used then an embedded real-time controller will be used instead.
You need software to interface with your hardware and to collect, analyze, present, and store your measurements. This device is compatible with a different programming languages depending on the platform used. If you are using the NI CompactDAQ platform then this device is compatible with LabVIEW, C/C++, Visual Basic, and .NET. However, if the CompactRIO platform is used then this device requires the LabVIEW FPGA Module (sold separately), the LabVIEW Real-Time Module (sold separately) and NI-RIO driver software (included with the hardware).

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