Analog Input

• 14 Analog Inputs built in (16-24 Bits Depending on Speed & Device Type)
• Expand to84 analog inputs with Mux80add-on
• T7: 16-bit high-speed ADC (up to 100k samples/s)
• T7-Pro: 24-bit low-speed ADC (resolution as low as1uV noise-free)
• Software Configurable Resolution Settings
• Single-Ended Inputs (14) or Differential Inputs (7)
• Analog input ranges: 10V, 1V, 0.1V and 0.01V
• All analog input features are software programmable by configuring theAnalog Input Registers
• High speed sampling configurable by usingStream Mode. Speeds up to 100kS/s
• Low Latency Sampling and Control (less than 1ms) is made easy withCommand-ResponseModbus messages
• Easy integration with sensors like thermocouples, load cells, bridges, and more …

Analog Output

• 2 analog outputs (12-bit, 0-5V)
• Waveform generation via Stream Out
• IntegratedLJTick-DACsupport for multiple +/-10V outputs

Digital I/O

• 23 Digital I/O
• Supports SPI, I2C, and more… (Master Only)
• 5 PWM Outputs with individual phase control
• 5 Pulse Outputs with configurable number, frequency, and width
• 2 Frequency Inputs returning both frequency and period
• 2 Pulse Width Inputs measuring time spent high and low as well as duty cycle
• 2 Line-to-Line Inputs measuring the time between edges on 2 different lines
• 4 High-Speed Counters
• 6 Software Counters with debounce capabilities
• 3 Pairs of Quadrature Inputs
• Many of these DIO Extended Features share pins and cannot be used at the same time. See theDIO Extended Featuressection of the T7’s datasheet

Fixed Current Outputs

• 200 A
• 10 A

Communication Options

• USB
• Ethernet
• 802.11b/g WiFi (T7-Pro only)

Other Highlights

• Capable of stand-alone operation by runningLua Scripts
• Built-In CJC Temperature Sensor for easy thermocouple temperature readings
• Watchdog system
• Field Upgradable Firmware
• Programmable Startup Defaults
• Industrial temperature range (-40 to +85C)
• For more information please visit thehardware overviewsection of theT7’s datasheet

Further Reading

More technical specifications about the T7 can be found inAppendix Aof the T7’s Datasheet.

T7-Pro vs. T7

The T7-Pro has the following additional features:

• 802.11b/g WiFi connectivity.

• Low-Speed and High-Resolution (24-bit) sigma-delta ADC.

• Battery Backed RTC for stand-alone data logging.

• Factory Installed microSD card for stand-alone data logging.

OEM Versions

The T7 and T7-Pro come in standard and OEM versions. The OEM versions are intended to be embedded in another device. They are missing the enclosure and most connectors, as it is easier to install connectors than it is to remove them. LabJack can customize the boards to add or remove hardware before shipping, for an additional fee. More information on OEM versions can be found in theOEM Versionssection of the T7 Datasheet.

• Each purchase includeslifetime support
• Actively monitored and highly informativeforumswhere users can share ideas, ask questions, and get answers from both peers and our technical support staff
• Free applicationsto configure, test, and log data to file
• Free examples: Python, C/C++, LabVIEW^[1], C#^[1], Delphi^[1], Java, MATLAB^[1], VB.NET^[1]and more
• Modbus TCP Use any platform that supports TCP/IP, no driver required
• The free, cross-platform LabJackLJM Library Extends/wraps the Modbus protocol for convenience
• Expansion boards and accessories Add10V DACs,4-20 mA inputs, terminal boards,relay boardsandmore…
• This all sounds like what I need, butwhy LabJack?

^[1]Windows-only. SeeLJM library examples pagefor details.

High Voltage Analog Inputs

• 4 dedicated high voltage analog inputs (10V, 12-bit resolution)
• Configurable resolution settings

Flexible I/O:

• 8 configurable low voltage analog inputs (0-2.5V, 12-bit resolution) that can function as digital I/O lines

Digital I/O:

• 8 dedicated digital I/O lines (EIO4-EIO7 and CIO0-CIO3)

Analog Outputs:

• 2 Analog Outputs (10-bit, 0-5 volts)
• Additional analog outputs are possible via the LJTick-DAC

• Each purchase includeslifetime support
• Actively monitored and highly informativeforumswhere users can share ideas, ask questions, and get answers from both peers and our technical support staff
• Free applicationsto configure, test, and log data to file
• Free examples: Python, C/C++, LabVIEW^[1], C#^[1], Delphi^[1], Java, MATLAB^[1], VB.NET^[1]and more
• Modbus TCP Use any platform that supports TCP/IP, no driver required
• The free, cross-platform LabJackLJM Library Extends/wraps the Modbus protocol for convenience
• Expansion boards and accessories Add10V DACs,4-20 mA inputs, terminal boards,relay boardsandmore…
• This all sounds like what I need, butwhy LabJack?

^[1]Windows-only. SeeLJM library examples pagefor details.

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, seeSection 2.5 – Flexible I/O (FIO/EIO)of theU3 Datasheet.

Analog Inputs:

The LabJack U3 has up to 16analog inputsavailable 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 see theU3 Datasheet. For analog input information seeSection 2.6 – AINandAppendix A. For data rate information seeSections 3.1 – Command/ResponseandSections 3.2 – Stream Mode.

Analog Outputs:

The LabJack U3 has 2analog 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 see theU3 Datasheet. For analog output information seeSection 2.7 – DACandAppendix A. For data rate information seeSection 3.1 – Command/Response.

Digital I/O:

The LabJack U3 has up to 20digital I/Ochannels. 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 see theU3 Datasheet. For digital I/O information seeSection 2.8 – Digital I/OandAppendix A. For data rate information seeSection 3.1 – Command/ResponseandSections 3.2 – Stream Mode.

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 see theU3 Datasheet. For timers information seeSection 2.9 – Timers/CountersandAppendix A.

Counters:

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

For more information see theU3 Datasheet. For counters information seeSection 2.9 – Timers/CountersandAppendix A.

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.

For more technical specifications look at theU3’s datasheet.

U3-HV vs U3-LV

The U3-HV has the following differences versus the U3-LV:

• 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.

OEM Versions

The U3-LV-OEM or U3-HV-OEM includes the board only without the enclosure and without most through-hole components. See Section2.12 of the U3 Datasheetfor more information.

Technical Specifications:

• 14 Analog Inputs (16-18+ Bits Depending on Speed)
• U6-Pro Adds 24-bit Low-Speed ADC for 22-Bit Effective Resolution
• Single-Ended Inputs (14) or Differential Inputs (7)
• Instrumentation Amplifier Inputs
• Software Programmable Gains of x1, x10, x100 and x1000
• Analog Input Ranges of 10, 1, 0.1 and 0.01 Volts
• Built-In CJC Temperature Sensor
• 2 Fixed Current Outputs (200/10 ?A)
• 2 Analog Outputs (12-Bit, ~0-5 Volts)
• 20 Digital I/O
• Up to 2 Counters (32 Bits Each)
• Up to 4 Timers (Pulse Timing, PWM Output, Quadrature Input, …)
• Supports SPI, I2C, and Asynchronous Serial Protocols (Master Only)
• Supports Software or Hardware Timed Acquisition (Hi-Speed Converter Only)
• Maximum Input Stream Rate of 50 kHz (Depending on Resolution)
• Capable of Command/Response Times Less Than 1 Millisecond
• Built-In Screw Terminals for Some Signals
• USB 2.0/1.1 Full Speed Interface
• Powered by USB Cable
• Drivers Available for Windows, Linux and Mac.
• Examples Available for C/C++, VB, LabVIEW, Python, and More
• Includes USB Cable and Screwdriver
• Free Firmware Upgrades
• Money Back Guarantee
• Enclosure Size Approximately 3″ x 7″ x 1″ (75mm x 185mm x 30mm)
• Rated for Industrial Temperature Range (-40 to +85 Degrees C)

For more technical specifications look at theU6’s datasheet.

Optional Accessories:

TheCB15is a simple screw terminal breakout for the DB15 connector.

TheRB12provides a convenient interface for the U3 to industry standard digital I/O modules, allowing electricians, engineers, and other qualified individuals, to interface a LabJack with high voltages/currents. The RB12 relay board connects to the DB15 connector on the LabJack, using the 12 EIO/CIO lines to control up to 12 I/O modules. Output or input types of digital I/O modules can be used. The RB12 is designed to accept G4 series digital I/O modules from Opto22, and compatible modules from other manufacturers such as the G5 series from Grayhill. Output modules are available with voltage ratings up to 200 VDC or 280 VAC, and current ratings up to 3.5 amps.

TheLJTick-Divider (LJTD)signal-conditioning module is designed to divide 2 single-ended higher voltage analog signals down to 0-2.5 volt signals.

TheLJTick-DAC (LJTDAC)provides a pair of 14-bit analog outputs with a range of 10 volts. Plugs into any digital I/O block, and thus up to 10 of these can be used per device to add 20 analog outputs.

TheLJTick-InAmp (LJTIA)signal-conditioning module provides two instrumentation amplifiers ideal for low-level signals such as bridge circuits (e.g. strain gauges) and thermocouples. Each amplifier converts a differential input to single-ended.

TheLJTick-RelayDriver (LJTRD)allows 2 digital I/O lines to each control a relay or other moderate load up to 50V/200mA.

TheLJTick-CurrentShunt (LJTCS)signal-conditioning module is designed to convert a 4-20 mA current loop input signal into a 0.47-2.36 volt signal.

TheLJTick-Proto (LJTP)consists of an 8×8 grid of holes for prototyping custom signal-conditioning modules.

Satisfaction Guaranteed:

Everything we sell has a 30-day money back guarantee. If, for any reason, you are not satisfied with a product, contact us to arrange your choice of a refund or replacement. In addition, the LabJack U3 is covered by a 1-year limited warranty.

Technical Support:

All LabJacks include lifetime technical support. Support resources include forum, FAQs, email, and telephone.

Drivers and Examples:

LabJack provides drivers for the three major operating systems and examples for most common programming languages. For more information see the U3software optionspage.

Firmware:

Be sure to keep an eye on theU3 Firmwarepage for the latest U3 firmware.

Analog Inputs:

The LabJack U6 has 14 externalanalog inputs(AIN0-AIN13). AIN0-AIN3 are available on screw terminals and also on the DB37 connector. All 14 analog inputs are available on the DB37 connector.

The maximum input range is 10 volts, with software selectable gains of x1, x10, and x100. Each analog input can be measured single-ended, or differentially in even/odd pairs. Analog input resolution is 16 bits at max speed (~20 ?s conversion time), increasing to 18+ bits at slower speeds (seeSection 3.1 – Command/ResponseandSection 3.2 – Stream Mode). Input impedance is at least 1 G?, with typical input bias currents of only 20 nA.

Command/response (software timed) analog input reads typically take 1-4 ms depending on number of channels and communication configuration. Hardware timed input streaming (supported with hi-speed converter only) has a maximum rate that varies with resolution from 4 ksamples/s at 18 bits to 50 ksamples/s at 16 bits.

For more information see theU6 Datasheet. The U6-Pro has all the features of the normal U6 with the addition of an auxiliary low-speed high-resolution (24-bit) sigma-delta ADC. Analog input resolution varies from 19.5 bits (RMS or Effective) at max speed (4 ms conversion time), to 22 bits at slower speeds (160 ms conversion time).

For more information about the analog inputs seeSection 2.6 – AINandAppendix A. For data rate information seeSection 3.1 – Command/ResponseandSection 3.2 – Stream Mode.

Temperature Sensor:

The LabJack U6 has a temperature sensor located very close to the AIN0-AIN3 screw-terminals. Accuracy is 2 degrees C (max). This sensor is particularly useful for thermocouple cold junction compensation (CJC).

Fixed Current Outputs:

The LabJack U6 has 2 fixed current outputs of 10 ?A and 200 ?A. These are useful for measuring resistance (resistors, thermistors, RTDs).

Analog Outputs:

The LabJack U6 has 2analog outputs(DAC0 and DAC1) that are available both on screw terminals and the DB37 connector. Each analog output can be set to a voltage between about 0 and 5 volts with 12-bits of resolution. The analog outputs are based on a true voltage reference.

The analog outputs are updated in command/response mode, with a typical update time of 1-4 ms depending on communication configuration.

For more information see theU6 Datasheet. For more information about the analog outputs seeSection 2.7 – DACandAppendix A. For data rate information seeSection 3.1 – Command/Response.

Digital I/O:

The LabJack U6 has 20digital I/Ochannels which can be individually configured as input, output-high, or output-low.

The first 4 FIO are available on screw terminals and the DB37 connector. All 8 FIO and 3 MIO are available on the DB37 connector, and 8 EIO and 4 CIO are available on the DB15 connector. Note that on the U6, CIO0-CIO2 are the same as MIO0-MIO2.

Command/response (software timed) reads/writes typically take 1-4 ms depending on communication configuration. The digital inputs can also be read in a hardware timed input stream where up to 16 inputs count as a single stream channel.

For more information see theU6 Datasheet. For more information about the digital I/O seeSection 2.8 – Digital I/OandAppendix A. For data rate information seeSection 3.1 – Command/ResponseandSection 3.2 – Stream Mode.

Timers:

Up to 4 digital I/O can be configured as timers. The timers are very flexible, providing options such as PWM output, pulse timing, pulse counting, and quadrature input.

For more information about the timers seeSection 2.9 – Timers/CountersandAppendix Aof theU6 Datasheet.

Counters:

Up to 2 digital I/O can be configured as 32-bitcounters. Since counting is one possible mode of the timers above, the U6 has up to 6 counting inputs.

For more information about the counters seeSection 2.9 – Timers/CountersandAppendix Aof theU6 Datasheet.

I/O Protection:

All I/O lines on the U6 are protected against minor overvoltages. The AIN lines can withstand continuous overvoltage of 20 volts, the FIO lines can withstand up to 10 volts, while the EIO/CIO/MIO lines can withstand 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.

U6 vs U6-Pro

The U6-Pro has the following additional features:

• Low-Speed and High-Resolution (24-bit) sigma-delta ADC giving access to resolution indices9 through 12.

OEM Versions

The U6 and U6-Pro come in standard and OEM versions. The OEM versions are intended to be embedded in another device. They are missing the enclosure and most connectors, as it is easier to install connectors than it is to remove them. LabJack can customize the boards to add or remove hardware before shipping for an additional fee. More information on OEM versions can be found in theOEM versionssection of the U6 datasheet.

Optional Accessories:

TheCB15is a simple screw terminal breakout for the DB15 connector.

TheCB37 (Rev. 2.1)is a simple screw terminal breakout for the DB37 connector.

TheEB37experiment board also provides screw terminals for the DB37 connector, and in addition provides a solderless breadboard and useful power supplies.

TheRB12provides a convenient interface for the U6 to industry standard digital I/O modules, allowing electricians, engineers, and other qualified individuals, to interface a LabJack with high voltages/currents. The RB12 relay board connects to the DB15 connector on the LabJack, using the 12 EIO/CIO lines to control up to 12 I/O modules. Output or input types of digital I/O modules can be used. The RB12 is designed to accept G4 series digital I/O modules from Opto22, and compatible modules from other manufacturers such as the G5 series from Grayhill. Output modules are available with voltage ratings up to 200 VDC or 280 VAC, and current ratings up to 3.5 amps.

TheLJTick-Divider (LJTD)signal-conditioning module is designed to divide 2 single-ended higher voltage analog signals down to 0-2.5 volt signals.

TheLJTick-DAC (LJTDAC)provides a pair of 14-bit analog outputs with a range of 10 volts. Plugs into any digital I/O block, and thus up to 10 of these can be used per device to add 20 analog outputs.

TheLJTick-InAmp (LJTIA)signal-conditioning module provides two instrumentation amplifiers ideal for low-level signals such as bridge circuits (e.g. strain gauges) and thermocouples. Each amplifier converts a differential input to single-ended.

TheLJTick-RelayDriver (LJTRD)allows 2 digital I/O lines to each control a relay or other moderate load up to 50V/200mA.

TheLJTick-CurrentShunt (LJTCS)signal-conditioning module is designed to convert a 4-20 mA current loop input signal into a 0.47-2.36 volt signal.

TheLJTick-Proto (LJTP)consists of an 8×8 grid of holes for prototyping custom signal-conditioning modules.

Satisfaction Guaranteed

Everything we sell has a 30-day money back guarantee. If, for any reason, you are not satisfied with a product, contact us to arrange your choice of a refund or replacement. In addition, the LabJack U6 is covered by a 1-year limited warranty.

Technical Support

All LabJacks include lifetime technical support. Support resources include forum, FAQs, email, and telephone.

Drivers and Examples:

LabJack provides drivers for the three major operating systems, and examples for most common programming languages. For more information see the U6software optionspage.

Firmware:

Be sure to keep an eye on theU6 Firmwarepage for the latest U6 firmware.