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U3-HV-OEM

The OEM variant does not include the screw terminals or enclosure. Designed for direct integration into a larger product, or platform.

Details

Details

USB Multifunction DAQ

The U3 series is a versatile product for measurement and control within simple analog and digital systems. With the option to configure its I/O as either analog or digital, users have flexibility in choosing sensors for their application. Common applications include hobbyist projects, educational programs, industrial control and monitoring, and prototype development.

Flexible I/O:

The first 16 I/O lines (FIO and EIO ports) on the LabJack U3-LV can be individually configured as digital input, digital output, or analog input. In addition, up to 2 of these lines can be configured as timers, and up to 2 of these lines can be configured as counters. On the U3-HV, the first 4 flexible I/O are replaced with dedicated high-voltage analog inputs.

The first 8 flexible I/O lines (FIO0-FIO7) appear on built-in screw terminals. The other 8 flexible I/O lines (EIO0-EIO7) are available on the DB15 connector.

For more information about the flexible I/O see Section 2.5 of the User's Guide. For data rate information see Section 3.1. The User's Guide can be found on the U3 Support page.

Analog Inputs:

The LabJack U3 has up to 16 analog inputs available on the flexible I/O lines. Single-ended measurements can be taken of any line compared to ground, or differential measurements can be taken of any line to any other line.

Analog input resolution is 12-bits. The range of single-ended low-voltage analog inputs on the U3-LV is typically 0-2.4 volts or 0-3.6 volts, and the range of differential analog inputs is typically ±2.4 volts (pseudobipolar only). For valid measurements, the voltage on every analog input pin, with respect to ground, must be within -0.3 to +3.6 volts.

On the U3-HV, the first 4 flexible I/O are replaced with dedicated high-voltage analog inputs. The input range of these channels is ±10 volts or -10/+20 volts. The remaining 12 flexible I/O are still available as described above, so the U3-HV has 4 high-voltage analog inputs and up to 12 low-voltage analog inputs.

Command/response (software timed) analog input reads typically take 0.6-4.0 ms depending on number of channels and communication configuration. Hardware timed input streaming has a maximum rate that varies with resolution from 2.5 ksamples/s at 12-bits to 50 ksamples/s at about 10-bits.

For more information about the analog inputs see Section 2.6 and Appendix A of the User's Guide. For data rate information see Sections 3.1 and Sections 3.2. The User's Guide can be found on the U3 Support page.

Analog Outputs:

The LabJack U3 has 2 analog outputs (DAC0 and DAC1) that are available on the screw terminals. Each analog output can be set to a voltage between 0 and 5 volts with 10-bits of resolution.

The analog outputs are updated in command/response mode, with a typical update time of 0.6-4.0 ms depending on communication configuration. The analog outputs have filters with a 3 dB cutoff around 16 Hz, limiting the frequency of output waveforms to less than that.

For more information about the analog outputs see Section 2.7 and Appendix A of the User's Guide. For data rate information see Section 3.1. The User's Guide can be found on the U3 Support page.

Digital I/O:

The LabJack U3 has up to 20 digital I/O channels. 16 are available from the flexible I/O lines, and 4 dedicated digital I/O (CIO0-CIO3) are available on the DB15 connector. Each digital line can be individually configured as input, output-high, or output-low. The digital I/O use 3.3 volt logic and are 5 volt tolerant.

Command/response (software timed) reads/writes typically take 0.6-4.0 ms depending on communication configuration. The first 16 digital inputs can also be read in a hardware timed input stream where all 16 inputs count as a single stream channel.

For more information about the digital I/O see Section 2.8 and Appendix A of the User's Guide. For data rate information see Sections 3.1 and 3.2. The User's Guide can be found on the U3 Support page.

Timers:

Up to 2 flexible I/O lines can be configured as timers. The timers are very flexible, providing options such as PWM output, pulse/period timing, pulse counting, and quadrature input.

For more information about the timers see Section 2.9 and Appendix A of the User's Guide. The User's Guide can be found on the U3 Support page.

Counters:

Up to 2 flexible I/O lines can be configured as 32-bit counters.

For more information about the counters see Section 2.9 and Appendix A of the User's Guide. The User's Guide can be found on the U3 Support page.

I/O Protection:

All I/O lines on the U3 are protected against minor overvoltages. The FIO lines can withstand continuous voltages of up to ±10 volts, while the EIO/CIO lines withstand continuous voltages of up to ±6 volts.

High Channel Count Applications:

By using USB hubs, many LabJacks can be interfaced to a single PC, providing an inexpensive solution for high channel count applications.

LV (Low-Voltage) Version:

  • 16 Flexible I/O (Digital Input, Digital Output, or Analog Input)
  • Up to 2 Timers (Pulse Timing, PWM Output, Quadrature Input, ...)
  • Up to 2 Counters (32-Bits Each)
  • 4 Additional Digital I/O
  • Up to 16 12-bit Analog Inputs (0-2.4 V or 0-3.6 V, SE or Diff.)
  • 2 Analog Outputs (10-Bit, 0-5 volts)
  • Supports SPI, I2C, and Asynchronous Serial Protocols (Master Only)
  • Supports Software or Hardware Timed Acquisition
  • Maximum Input Stream Rate of 2.5-50 kHz (Depending on Resolution)
  • Capable of Command/Response Times Less Than 1 Millisecond
  • Built-In Screw Terminals for Some Signals
  • OEM Version Available
  • USB 2.0/1.1 Full Speed Interface
  • Powered by USB Cable
  • Drivers Available for Windows, Linux, Mac and Pocket PC
  • Examples Available for C/C++, VB, LabVIEW, Java, and More
  • Includes USB Cable and Screwdriver
  • Free Firmware Upgrades
  • Money Back Guarantee
  • Enclosure Size Approximately 3" x 4.5" x 1.2" (75mm x 115mm x 30mm)
  • Rated for Industrial Temperature Range (-40 to +85 Degrees C)

HV (High-Voltage) Version:

Same features as the LV version except:

  • First 4 Flexible I/O are Changed to Dedicated HV Analog Inputs.
  • 4 HV Inputs have ±10 Volt or -10/+20 Volt Range.
  • 12 LV Inputs (Flexible I/O) Still Available, for 16 Total Analog Inputs.

  Product Comparison

U12 U3-LV U3-HV U6 U6-Pro UE9 UE9-Pro T7 T7-Pro
AIN Voltage ±10V 0-2.4V ±10V [1] ±10V ±10V ±5V ±5V ±10V ±10V
Analog Inputs 8 16 16 14 14 14 14 14 14
Effective Resolution [2] 12 bit 12 bit 12 bit 16 bit 22 bit 12 bit 20 bit 16 bit 22 bit
Digital I/O 20 20 16 20 20 23 23 23 23
Logic Level 5V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V
Analog Outputs 2 2 2 2 2 2 2 2 2
Counters 1 Up to 2 Up to 2 Up to 2 Up to 2 Up to 2 Up to 2 Up to 10 Up to 10
USB Yes Yes Yes Yes Yes Yes Yes Yes Yes
LJTick Compatible No Yes Yes Yes Yes Yes Yes Yes Yes
Internal Temp Sensor No Yes Yes Yes Yes Yes
Yes
Yes Yes
Thermocouple Ready [3] No No No Yes Yes No Yes Yes Yes
Ethernet No No No No No Yes Yes Yes Yes
Scripting No No No No No No No Yes Yes
Wireless No No No No No No No No Yes
Real-time Clock No No No No No No No No Yes
[1] Can be configured for -10V to +20V range.
[2] According to actual measured data, see related Noise and Resolution (App Note)
[3] If not thermocouple ready, can purchase an amplifier like the LJTick-InAmp, see related Thermocouples (App Note)