Modbus TCP/IP - LabJack | LabJack

Modbus TCP/IP - LabJack

LabJack Modbus TCP Network Topology Diagram
Example Modbus TCP Network Topology
  • LabJack Modbus TCP Network Topology Diagram
  • Programmatic Data Flow Diagram with LJM or 3rd party Modbus Library/SCADA application
  • LabJacks with PoE Adapters
  • LabJack's T7-Pro features a 24 bit ADC, accepts up to 84 analog inputs, connects via USB, Ethernet or WiFi
  • LabJack with Raspberry Pi
  • LabJack Suggested Scada System Network Topology Diagram

Modbus TCP/IP is an industrial communication protocol that uses Ethernet or Wireless TCP/IP or UDP connections to enable data to be sent in between devices.  Switching to a more common IP based network connection enables faster, longer range, and more reliable connection between a host PC and the Modbus Slave device itself.

LabJack offers laboratory grade, industrial spec. computer based data acquisition (DAQ) hardware and control products. Our products are powerful, yet affordable; multifunction tools to equip engineers to solve challenges, and unlock insights.  "LabJacks" can be easily integrated into larger systems via the Modbus TCP protocol.  LabJacks T-Series devices (T4, T7) are implemented as Modbus Slaves or Servers that expose a set of Registers that can be read or written to by sending Modbus packets over both TCP and UDP connections. 

For additional information about LabJack devices and their Modbus capabilities see the pages listed below:

Learn More About LabJack
Get to know the T7
Multifunction Modbus TCP Devices

LabJack's devices are multifunction devices in that they have many analog and digital I/O lines ranging from 12-bit up to 24-bit resolution.  They can be:

Landing Page Why LabJack

Why LabJack

Legendary Support

  • Email responses that actually answer your question.
  • Free lifetime support includes (some) engineering design help.
  • The engineers who made the product also respond to your questions.
  • Should your LabJack misbehave, we offer free RMA diagnostics & repairs.


  • Software integrates easily. We don't force you into a certain software, programming environment or operating system.
    • LabVIEW, C++, MATLAB, Python, Java, .NET, Delphi, Visual Basic, VB6, VBA, and more
    • Windows, Mac OS X*, Linux*
  • Add new kinds of sensors on-the-fly. We provide inexpensive signal conditioning modules.
  • Control valves, motors, lights, pumps, etc - using one of many digital I/O control options.
  • Incorporate LabJack DAQ hardware using our OEM options.

Quality Hardware

  • Have confidence in your measurements. Every device is individually tested and calibrated.
  • New features and updates are readily available through field-programmable firmware.
  • Multiple protection mechanisms on every I/O to help prevent electrical damage. 

* Not all platforms are fully supported for each device, see our LabJack Applications, Example Code/Wrappers, and Installer Downloads pages for more details.  Our T-Series devices (T4, T7) have the best cross platform support.

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