Serial Modbus Gateways

The gateway interfaces Monnit Wireless Sensors with serial Modbus RS-232C and RS-485 sensing and control infrastructures. You can connect up to 50 sensor per gateway with features Monnit’s access point node, serial RS-232C and RS-485 Interfacing hardware.

Firstly, Monnit recognises the industry standard MODBus is used in many industrial processes. Monnit’s wireless sensors work with this standard.

Secondly, Modbus connects to a supervisory computer with a remote terminal unit in supervisory control and data acquisition (SCADA) systems. Modbus allows communication up to 247 devices to the same wired network. Therefore, the serial modbus gateways allows for unlimited wireless expansion to a traditional wired network.

Features include:

  • Communicates with MODBUS RTU / ASCII Serial Protocols.
  • Supports RS-232C / RS-485 Interfacing.
  • Integrates into your existing backend monitoring systems.
  • NEMA 4X / IP66 Rated Enclosure.


It is recommended to purchase the Serial Modbus Gateway USB programmer and software to help you configure and use your Monnit SMG Gateway.

Finally, for more information, contact us or download the spec sheet here.


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serial modbus gateway