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July 2025
U2122A
Keysight/Agilent U2122A, 32 Optically Isolated Inputs, USB 2.0 Compliant, USB Digital I/O Module
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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✔ NIST Calibration Available
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
Keysight/Agilent U2122A USB Digital I/O Module
The Keysight U2122A (formerly from Agilent) is a full-speed USB 2.0 compliant, TMC 488.2 USB digital I/O module that has been designed to provide 32 optically isolated inputs (0-24 V). Due to its optically isolated inputs, this module is able to deliver noise-free interfacing for use in harsh industrial applications. When used with the Keysight U2122A's built-in edge detection feature, the module will automatically capture any state changes. In addition, the module's built-in programmable digital filter will reject unwanted signal "glitches" and "contact bounces" generated by mechanical switches. These features allow engineers to obtain clean data for their monitoring and automation applications. Channel-to-channel isolation within the U2122A also helps protect both the host computer and any other connected equipment from electrical currents flowing through ground loops and/or voltage transients. As an added protection measure for the data acquisition hardware, the opto-isolators help prevent common mode transient signals from damaging the hardware.
Engineers use the U2122A to interface with various types of inputs, including but not limited to limit switches, photoelectric sensors, relay contacts, and PLC output connections for automated test and industrial monitoring systems. The U2122A’s compact input-only galvanic isolation is ideal when floating measurements need to be made, such as measuring high-side driver signals or checking actuator position without introducing a reference ground. The edge-detection capabilities enable accurate pulse counting and event timing. The digital filter provides programmable rejection of unwanted signal contamination caused by variable frequency drive signals and switching power supply signals, which in turn provides a more stable reading. By utilizing a built-in signal conditioner, the number of wires needed externally is reduced, thereby making it easier to develop a complete system design and providing reliable performance in noisy manufacturing floor environments.
Keysight/Agilent provides a number of tools to assist users in developing their own custom solutions using the U2122A. There is a diagnostic tool available that quickly verifies all 32 input lines on the module. Additionally, Keysight has provided IVI-COM drivers that allow seamless integration of the U2122A with Keysight's VEE, National Instruments' LabVIEW, MathWorks' MATLAB, Microsoft Visual Studio, etc. SCPI-compatible commands enable writing programs in languages such as Python, C#, or any other program that supports USB communications. Users may also access all 32 input lines at once through the diagnostic panel provided with the U2122A. For those who wish to develop applications rapidly, ready-made code segments and virtual instrumentation panels have been designed to facilitate rapid application development.
| Model Name | U2122A |
|---|---|
| Part Type | Isolated USB Digital Input Module |
| Manufacturer | Keysight |
| Legacy Manufacturer | Agilent |
| Input Channels | 32 opto?isolated |
| Input Voltage | 0–24 V DC |
| Isolation Voltage | 1,250 Vrms (channel-to-ground, channel-to-channel) |
| Logic Low | ≤1.5 V |
| Logic High | ≥3.0 V (24 V max) |
| Input Current | 2 mA at 24 V DC per channel |
| Edge Detection | 1 ms timestamp resolution |
| Digital Filter | 0–100 ms, 1 ms steps |
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