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July 2025
783734-01
NI 783734-01, 11 V to 30 V, 100 μs, NI-9421 C Series Digital Module
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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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
National Instruments 783734-01 NI-9421 C Series Digital Input Module
The National Instruments 783734-01 (NI-9421) is an 8-channel, 24 V industrial sinking digital input module engineered for industrial control, switching monitoring, and automated test applications within CompactDAQ and CompactRIO platforms. Featuring a maximum input propagation delay of 100 µs, the module connects directly to industrial sensors, switches, and field devices operating on a 24 V logic level. Each channel is configured for sinking inputs, recognizing an OFF state at input voltages up to 5 V (≤300 µA current) and an ON state at input voltages between 11 V and 30 V (≥3 mA current), with switching thresholds remaining stable across the entire operating temperature range.
Built with robust internal signal conditioning, the NI-9421 limits input current to 7 mA maximum per channel and includes integrated reverse-voltage protection up to -30 V, alongside overvoltage protection up to 40 V maximum to prevent hardware damage from wiring errors or electrical transients. The spring-terminal version weighs 153 g and includes screw-flange securing fasteners (0.2 N·m torque). Its front-panel spring terminals accommodate wire gauges from 24 AWG to 12 AWG (0.2 mm² to 2.5 mm² with a 10 mm strip length) rated for 90 °C minimum, supporting either a single conductor or two conductors using a dual-wire ferrule per terminal.
Engineered for harsh environments, the module operates across a wide temperature range of -40 °C to 70 °C (10% to 90% non-condensing relative humidity) and is housed in an IP40-rated enclosure (Pollution Degree 2). Electrical safety includes a 30 V maximum channel-to-COM safety rating and 250 Vrms continuous channel-to-earth ground isolation. Operating power consumption from the chassis backplane is capped at 240 mW active (7 mW max in sleep mode), with thermal dissipation reaching 1.3 W maximum at 70 °C. The module is rated to withstand operational shock up to 30 g (11 ms half-sine pulse) and random operating vibrations of 5 g RMS from 10 Hz to 500 Hz, making it a reliable digital interface near heavy industrial machinery.
Part Number |
783734-01 |
|---|---|
Model Name |
NI-9421 |
Part Type |
24 V, 8-Channel (Sinking Input), 100 µs C Series Digital Module |
Number Of Channels |
8 Digital Input Channels |
Input Type |
Sinking |
OFF State Input Voltage |
≤5 V |
OFF State Input Current |
≤300 μA |
ON State Input Voltage |
11 V To 30 V |
ON State Input Current |
≥3 mA |
Maximum Input Delay Time |
100 μs |
Associated part numbers for 783734-01:
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