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July 2025
NI-9403
NI-9403, 32 Bidirectional Channels, D-SUB Front Connection, Digital Module
Actual item may vary if no part number is provided on quote request.
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Expert Insights for the NI-9403
"The NI-9403 is an excellent choice for any CompactRIO system that needs reconfigurable I/O, high-speed counters, or digital pulse generation. It supports programming with the LabVIEW FPGA module as well as a variety of digital communication protocols. You can also use this device as a software timed digital I/O module! It has 32 digital channels, making it perfect for high channel systems."
- Chris B.
LabVIEW Trained
In-House Technician
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Expert Insights for the NI-9403
"The NI-9403 is an excellent choice for any CompactRIO system that needs reconfigurable I/O, high-speed counters, or digital pulse generation. It supports programming with the LabVIEW FPGA module as well as a variety of digital communication protocols. You can also use this device as a software timed digital I/O module! It has 32 digital channels, making it perfect for high channel systems."
- Chris B.
LabVIEW Trained
In-House Technician
National Instruments NI-9403 C Series Digital Module
The National Instruments NI-9403 (Part Numbers: 779787-01, 780179-01, and 199027C-03L) is a 32 Channel Digital Module for input or output with live line-to-line configuration capability. This module has D-SUB front connectors and can be used with the CompactDAQ and CompactRIO platforms. This module can be utilized with the NI-9923 Screw Terminal Block, a 1 m DSUB cable, and a Din-Rail Spring Terminal Block. The device has an update rate of 7 μs.
With reconfigurable I/O (RIO) innovation (in CompactRIO only), the user can employ the LabVIEW FPGA Module to program the NI 9403 to implement high-speed counters/timers, digital communication protocols, pulse generation, and more. Other compatible software packages are the LabVIEW professional development system for windows, and LabVIEW Real-Time module. In a NI CompactDAQ Chassis, the user can operate the NI-9403 solely as a static Digital I/O Module (software timed). However, the user should consider that they cannot utilize these modules to route timing and trigger signals. Each channel has a DIO pin to which they can connect a digital input or output gadget. The 32 DIO channels are internally referenced to COM, so the user can utilize any of the four COM lines as a reference for the external signal.
The user can independently arrange each DIO channel in software for input or output. The DIO channels have Schmitt trigger sources of input and are compatible with 5 V TTL logic gadgets. Each input channel has hysteresis for improved execution with noisy and non-monotonic input signals.
Each channel additionally has a pull-down resistor and incorporates overvoltage, overcurrent, and short-circuit protection. The overcurrent protection permits only a predefined amount of current through the output channels to protect the NI 9403 module from short-circuits. If the 9403 NI card goes into an overcurrent state, the module sets all the DIO channels to high impedance for approximately 280 milliseconds. The device has an overvoltage protection of ±30 V.
The NI device weighs 5.3 oz. It has a recommended operating temperature range of -40 °C to 70 °C, and a storage temperature range of -40 °C to 85 °C.
| Model | NI-9403 |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 779787-01, 780179-01, 199027C-03L |
| Series | C Series |
| Type | Digital Module |
| Channels | 32 BIdirectional |
| Overvoltage Protection | ±30 V |
| Update Rate | 7 μs Maximum |
| Digital I/O Logic Levels | 5 V TTL |
| Digital I/O Isolation | 60 VDC Channel-Earth Ground |
| Current Flow Direction | Sinking Input, Sourcing Input, Sinking Output, Sourcing Output |
| Front Connection | D-SUB |
| Enclosed? | Yes |
| Weight | 5.3 oz. |
| NI-9403 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Request a Quote for Pricing Information |
Associated part numbers for NI-9403:
National Instruments NI-9403 Frequently Asked Questions
Question: What is the difference between the two part numbers for the module?
Answer: The NI-9403 has one version that is conformal coated (Part Number: 779787-01) and another version that is not conformal coated (Part Number: 780179-01).
Question: What is the current flow direction for the NI-9403?
Answer: The current flow direction for the Digital Module is Sourcing Input, Sourcing Output, Sinking Output, and Sinking Input.
Question: If the user is utilizing the NI-9403 in marine applications and needs to meet EMC requirements, what should they do to ensure the requirements are met?
Answer: While using the Digital Module for marine applications the user must insert the product in a shielded enclosure with shielded and/or filtered power input/output ports to meet the EMC requirements. The user must also be careful when creating, choosing, and inserting measurement probes and cables to guarantee that the required EMC performance is met.
Question: What happens when the module goes into an overcurrent state?
Answer: When the NI-9403 goes into an overcurrent state, the C Series module sets all the DIO channels to high impedance for about 280 milliseconds.
NI-9403 PDF Manuals
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