Modbus TCP DAQ


LabJack produces low cost, high quality, data acquisition (DAQ) and control devices that are compatible with the Modbus TCP/UDP protocol. This means that they can be controlled by many industrial SCADA Systems/Modbus Client Applications, and used natively in any programming language that supports TCP connections. There are several Modbus TCP Libraries available in a variety of different languages.

Product Comparison

U12 U3-LV U3-HV U6 U6-Pro UE9 UE9-Pro T4 T7 T7-Pro
Full Support No No No No No No No Yes Yes Yes
Partial Support No No No No No Yes Yes No No No

To view our USB DAQ product offerings please see our USB DAQ (data acquisition) products. To view our Ethernet DAQ product offerings please see our Ethernet DAQ (data acquisition) products. To view our WiFi DAQ product offerings please see our Wifi DAQ (data acquisition) products.

Please note that the term "DAQ (data acquisition)" implies products that connect to a PC to acquire data. Hence, the term "Modbus TCP DAQ" means that this communication occurs using a PC's active network connection. If you need an instrument that can operate independently from a computer we have Data Logging compatible DAQ devices that are capable of periodically recording to internal memory for later use.

DAQ Devices

$429/$369 OEM
High performance, USB, Ethernet, WiFi
  • USB, Ethernet, and WiFi connectivity
  • Fully compatible with Modbus TCP
  • 14 analog inputs
  • 16+ bits of resolution
  • T7-Pro: Up to 22-bit resolution
  • ±10V, ±1V, ±0.1V, and ±0.01V ranges
  • 100k samples/s max stream rate
  • Expand to 84 channels with Mux80
  • Optional NIST traceable Calibration Certificate.
  • AIN-EF: Hardware scaling & processing
  • 2 analog outputs
  • 23 digital I/O
  • Up to 12 timer and counter features
  • Run Lua scripts in hardware
T7: 429.00
T7-Pro: 529.00
T7-OEM: 359.00
T7-Pro-OEM: 459.00
$199/$169 OEM
Low cost USB and Ethernet
  • USB and Ethernet connectivity
  • Fully compatible with Modbus TCP
  • Up to 12 analog inputs
  • 12-bit resolution
  • 4 dedicated ±10V analog inputs
  • Up to 8 0-2.5V analog inputs
  • 50 ksamples/s max speed
  • AIN-EF: Hardware scaling & processing
  • 2 analog outputs
  • Up to 16 digital I/O
  • Up to 10 timer and counter features
  • Run Lua scripts in hardware
T4: 199.00
T4-OEM: 169.00
$519/$619 Pro
The original USB and Ethernet DAQ
  • USB and Ethernet connectivity
  • 14 analog inputs
  • 12–16 bit resolution
  • UE9-Pro: Up to 20-bit resolution
  • ±5V and 0-5V ranges
  • 50 ksamples/s max stream rate
  • Expand to 84 channels with Mux80
  • 2 analog outputs
  • 23 digital I/O
  • 6 timers and 2 counters
UE9: 519.00
UE9-Pro: 619.00

DAQ Services

NIST traceable calibration of the U6, T7, or UE9.  Includes a calibration certificate.

CAL_SERVICE: 60.00

Product Comparison

T-Series

UD Series
Legacy
U3-LV U3-HV U6 U6-Pro T4 T7 T7-Pro
Voltage Range[1] 0-2.4V ±10V [1] ±10V ±10V ±10V[4] ±10V ±10V
Analog Inputs 16 16 14 14 12 14 14
Effective Resolution [2] 12 bits 12 bits 16 bits 22 bits 12 bits 16 bits 22 bits
Digital I/O 20 16 20 20 16 23 23
Logic Level 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V
Analog Outputs 2 2 2 2 2 2 2
Counters Up to 2 Up to 2 Up to 2 Up to 2 Up to 10 Up to 10 Up to 10
USB Yes Yes Yes Yes Yes Yes Yes
LJTick Compatible Yes Yes Yes Yes Yes Yes Yes
Internal Temp Sensor Yes Yes Yes Yes Yes Yes Yes
Thermocouple Ready [3] No No Yes Yes No Yes Yes
Ethernet No No No No Yes Yes Yes
Modbus TCP No No No No Yes Yes Yes
Scripting No No No No Yes Yes Yes
Wireless No No No No No No Yes
Real-time Clock No No No No No No Yes
OEM Version Yes Yes Yes Yes Yes Yes Yes
Recommended [5] Yes Yes Yes Yes Yes Yes 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)
[4] The T4 has 4 high voltage (±10V) and up to 8 low voltage (0-2.5V) analog input lines
[5] The U12, UE9, and UE9-Pro are older devices and are not recommended for most new applications. Consider using the T4, T7, U3, or U6.

For more details, see the comparison page.