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LabJack
U3 USB Flexible DAQ Unit
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Description |
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A
versatile low-cost USB multifunction data acquisition and control
device. Has flexible inputs which can be configured for any mix and
analogue inputs, and digital inputs/outputs. Supplied with a wide
range of FREE Data logging software and examples for use with most
programming and DAQ packages.
Two
versions now available - "LV" Low Voltage, similar to the
previous U3 and the "HV" High Voltage which has 4 x 10/20V
input ranges.
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Product |
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U3-LV
U3-HV
User
Manual >>
Accessories >>
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U3-LV
U3-HV
Differences
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Flexible
I/O |
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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.
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Analogue
Inputs |
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The
LabJack U3 has up to 16 analogue 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.
Analogue
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 analogue inputs is typically ±2.4
volts (pseudobipolar only). For valid measurements, the voltage on
every analogue 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 analogue 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
analogue inputs and up to 12 low-voltage analogue inputs.
Command/response
(software timed) analogue 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.
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Analogue
Outputs |
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The
LabJack U3 has 2 analogue outputs (DAC0 and DAC1) that are available
on the screw terminals. Each analogue output can be set to a voltage
between 0 and 5 volts with 10-bits of resolution.
The
analogue outputs are updated in command/response mode, with a
typical update time of 0.6-4.0 ms depending on communication
configuration. The analogue outputs have filters with a 3 dB cutoff
around 16 Hz, limiting the frequency of output waveforms to less than that.
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Digital
I/O |
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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.
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 timing,
pulse counting, and quadrature input.
Counters
Up
to 2 flexible I/O lines can be configured as 32-bit counters.
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.
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Software |
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The
LabJack U3 is supplied with a range of software which can also be
downloaded here.
Control
Panel Application
The
LabJack Control Panel application handles configuration and testing
of the U3. When first opened it searches for connected LabJacks and
displays a list. Self-Upgrade Application
The
U3 has field upgradeable flash memory. The self-upgrade application
programs the latest firmware into the processor. FREE firmware
upgrade will be available from time to time bringing improved
performace and new features. |
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DAQFactory
Express Software |
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The
U3 is supplied with a FREE copy of DAQFactory Express. This offers;
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Optional
Software |
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RealView
- The premier virtual chart recorder software package.
More
Information >>
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ProfiLab-Expert
- graphical
programming software package for data acquisition and control applications
More
Information >>
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LabVIEW
Supplied
with LabVIEW VI's. These VIs make use of the native TCP capability
of LabVIEW. They do not require any special LabJack drivers, and thus
should work on any LabVIEW platform that supports TCP
Programming
Includes
Visual C and Visual Basic modules for the LabJackUD driver, and
simple example projects.
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Accessories |
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CB-15
Screw Terminal Board
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Provides
convenient screw terminals for the DB15 connector on the LabJack U3.
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LJTick-InAmp
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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. The LJTIA
has switches to choose from 5 gain settings (x1, x11, x51, x201, or
custom) and two output voltage offsets. The 4-pin design plugs into
the standard AIN/AIN/GND/VS screw terminal block found on the U3.
User
Manual >> |
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LJTick-Relay
Driver
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The
LJTick-RelayDriver (LJTRD) allows 2 digital I/O lines on a U3 or UE9
to each control a relay or other moderate load. The 4-pin design
plugs into the standard DIO/DIO/GND/VS screw terminal block found on
newer LabJacks such as the U3 and UE9.
Each
DIO controls a switch to ground (i.e. open-collector) that can hold
off up to 50 volts and can sink up to 200 mA.
User
Manual >> |
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LJTick-Divider
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The
LJTick-Divider (LJTD) is a signal-conditioning module designed to
take 2 single-ended higher voltage analogue signals, and divide them
down to 0-2.5 volt signals. The 4-pin design plugs into the standard
AIN/AIN/GND/VS screw terminal block found on newer LabJacks such as
the U3 and UE9.
The
use of large resistors and a precision op-amp buffer provides an
input impedance of 1 megaohm. By adding or replacing resistors, many
other configurations are possible, as discussed in the datasheet.
User
Manual >> |
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LJTick-Divider
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The
LJTick-CurrentShunt (LJTCS) is a signal-conditioning module designed
to convert a 4-20 mA current loop input signal into a 0.47-2.36 volt
signal compatible with the LabJack U3 or UE9. The 4-pin design plugs
into the standard AIN/AIN/GND/VS screw terminal block found on newer
LabJacks such as the U3 and UE9.
User
Manual >> |
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PowerEgg
- Mains Switch/Monitor
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User
Manual >>
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EI1050
Digital Temperature/Humidity Probe
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Datasheet
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EI1034
Digital Temperature Probe
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Datasheet
>>
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USB
Active
Extender
USB-EXT
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A
USB cable cannot be used reliably used where the distance is greater
than 5m. For distances greater than this, an active USB repeater is required
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USB
Active
Extender CAT5
USB-CAT5
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Overcome
USB's 5m transmission limitation by using this extender along with
standard network cable. Can extend USB by up to 45m.
NOTE
- not supplied with RJ45 cable - just Master and Remote units
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USB
Active Extender with 4-port HUB
USB-EXTHUB |
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Phone
+44(0)115 925 8412 | Fax +44(0)115 925 9757 |