1.0 Device Overview [T-Series Datasheet]

This document contains device-specific information for the following devices:

T4
T4-OEM
T7
T7-Pro
T7-OEM
T7-Pro-OEM
T8

This family introduces a new line of high-quality analog and Ethernet data acquisition hardware combined with the main traditional advantage of all LabJack data acquisition hardware—namely, high performance and rich feature set at a competitive price point. These features make the T-series a logical choice for many high-performance applications where Ethernet, WiFi, and cost are primary considerations.

Core Features

All T-Series Devices

On-board Lua scripting for custom, headless operation

T4

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

T7

Analog I/O

14 Analog Inputs (16-18+ Bits Depending on Speed), expand to 84 with MUX80
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
2 Analog Outputs (12-Bit, ~0-5 Volts)

Digital I/O

23 Digital I/O
Supports up to 10 counters
Supports SPI, I2C, 1-Wire and Asynchronous Serial Protocols (Master Only)
Supports Software or Hardware Timed Acquisition
Maximum Input Stream Rate of 100 kHz (Depending on Resolution)
Capable of Command/Response Times Less Than 1 millisecond

Digital I/O Extended Features

Simple PWM Output (1-32 bit)
PWM Output w/ phase control
Pulse Output w/ phase control
Positive edge capture
Negative edge capture
PWM measure
Edge capture & compare
High speed counter
Software counter
Software counter w/ debounce
Quadrature Input
Easy Frequency Input

Analog Input Extended Features

User Defined Slope & Offset
Thermocouple type E, J, K, R, T, and C calculations
RTDs
Thermistors

Other highlights

Built-In CJC Temperature Sensor
Watchdog system
Field Upgradable Firmware
Programmable Startup Defaults
LJTick Compatible

Fixed Current Outputs

200 µA
10 µA

T8

Analog I/O

8 Analog Inputs (21 bits at 100 Hz)
Simultaneous Sampling
Isolated - Each input in fully isolated
Instrumentation Amplifier Inputs
Software Programmable Gains of 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
11 Analog Input Ranges from ±11 Volts, to ±0.019 Volts
2 Analog Outputs (16-Bit, 0-10 Volts, up to 20 mA)

Digital I/O

20 Digital I/O
Configurable pull-ups and pull-downs
Supports up to 7 hardware, or 16 software counters
Supports SPI, I2C, 1-Wire and Asynchronous Serial Protocols (Master Only)
Supports Software or Hardware Timed Acquisition
Maximum Input Stream Rate of 50 kHz (Depending on Resolution)
Capable of Command/Response Times Less Than 150 microsecond

Digital I/O Extended Features

Simple PWM Output (1-32 bit)
PWM Output w/ phase control
Pulse Output w/ phase control
Positive edge capture
Negative edge capture
PWM measure
Edge capture & compare
High speed counter
Software counter
Software counter w/ debounce
Quadrature Input
Easy Frequency Input
100 MHz Clock Source

Analog Input Extended Features

User Defined Slope & Offset
Thermocouple type E, J, K, R, T, and C calculations
RTDs
Thermistors

Other Highlights

Built-In CJC Temperature Sensors
Watchdog system
Field Upgradable Firmware
Programmable Startup Defaults
LJTick Compatible

Fixed Reference Output

3.3 V

Device Variants

T-Series devices are built in several configurations:

Standard – The standard device configuration. Comes in a red case with screw terminals and DB connectors installed.
OEM – The device PCB without USB, screw-terminals, or the DB connectors installed. Intended for customers that integrate LabJack devices into their own products.
Pro (not available for all devices) – The Pro option adds hardware upgrades such as higher resolution (ADC) and WiFi. This option can be stacked with any of the Standard or OEM configurations.

For more information about the OEM variants, see Section 22: OEM Versions

Family Variants

All T-series Devices

All T-Series devices use Modbus TCP and are compatible with the LJM Library. Programs designed for one T-Series device will often work on other T-Series devices with minimal changes.

T4 vs T7

T4 characteristics that differ from the T7:

12-bit effective resolution on HV and LV lines.
AIN (0-3) are high voltage (±10V).
Flexible I/O lines: The T4 I/O lines FIO (4-7) and EIO (0-3) are software-configurable to be either low voltage analog inputs (0-2.5V) or digital I/O lines (3.3V logic level).

T7 vs T7-Pro

The T7-Pro has all features of the normal T7, with the following added:

Wireless Ethernet 802.11b/g.
24-bit low-speed sigma-delta ADC.
Battery-backed real time clock for stand-alone data logging.
Factory installed microSD card for stand-alone data logging.

Also see the block diagram in the hardware overview section.

T7-OEM and T7-Pro-OEM

There are also OEM versions of the T7 and T7-Pro. The OEM versions are the same in terms of features, but the enclosure and most connectors are not installed on the OEM versions, allowing customization as needed. See 22.0 OEM Versions for details.

T8

The T8 builds upon the success of the T4 and T7 devices and adds unique features previously unavailable to LabJack customers.

8 Isolated Analog Inputs (1000 Vrms channel to channel and channel to ground isolation
Simultaneous sampling for added timing precision
24-bit ΣΔ ADC (up to 40k samples/s/ch) previous LabJack devices with high resolution converters were low speed sampling
10+ different Voltage Ranges: ±11V, ±9.6V, ±4.8V, ±2.4V,±1.2V, ±0.6V, ±0.3V, ±0.15V,±0.75V, ±0.36V, and ±0.18V