W-Modbus DIN rail

- Wireless Modbus for your electrical cabinet
W-Modbus eliminates the need to run control cables for Modbus RTU installations significantly reducing time-consuming cable installations, installation planning, troubleshooting, and daisy-chaining.

With LumenRadio’s technology it is possible to create a wireless Modbus RTU network that maintains the standardization of the protocol and by converting the Modbus signals into LumenRadio’s Mira technology we can send the Modbus RTU signal wirelessly with low latency. We call this W-Modbus.

The W-Modbus product is built upon LumenRadio’s MiraOS and MiraMesh, consisting of several patented features enabling extremely reliable radio communication, fast installation, and extended range. MiraOS is used in a vast number of installations around the world for building automation, HVAC control, lighting control and industrial sensor networks.

A W-Modbus unit can be configured either as a Gateway that is connected to the Modbus Client, or a Node that is connected to the Modbus Server. A W-Modbus network can consist of up to 100 Nodes.

W-Modbus utilizes the international license free ISM band at 2.4GHz.

Replacing wires with wireless communication brings significant benefits without changing the existing ecosystem. Legacy wired devices such as sensors, can be converted into wireless devices, providing increased flexibility and cost savings, both during installation and steady-state operation.

Instant installation

Unique reliability

Baud rate agnostic

Long range

  • Out-of-the-box installation – just power up and connect to your Modbus device and you are up-and-running.
  • Instant commissioning – 3 simple steps, commissioning the W-Modbus network in minutes.
  • Mesh network – cover an entire building, utilizing the mesh network as your infrastructure.
  • Range – 700 meters (line-of-sight) per hop in the mesh network (approximately 50- 70 m indoors with walls)
  • Cognitive Coexistence – LumenRadio’s patented technology provides industrial-grade reliability and immunity to interference.
  • Self-optimizing network – the mesh network will always find the best way to send messages through the network between devices.
  • Modular configuration – you no longer need to have the same baud rate in the whole network, supports individual settings for each device.
  • Power supply AC: 24 VAC ±15%
  • Power supply DC: 12–24 VDC ± 15%
  • Max. power consumption: 2.5 W
  • Auto resettable fuse: Yes
  • Solid cable rating, connector: 0.2 – 1.5 mm2
  • Stranded cable rating, connector:  0.2 – 1.5 mm2
  • Conductor sizes (AWG): 24 – 16
  • Range – 700 meters (line-of-sight) per hop in the mesh network (approximately 50- 70 m indoors with walls)
  • IP class: 20
  • Dimensions (W x H x D): 36.5 x 93.0 x 58.7
  • Weight: 87 g
  • Power source restriction: Only to be powered by a UL listed LPS power supply of max 15 W
  • Ambient operating temperature: -20 to +55°C
  • Ambient storage temperature: -30 to +80°C
  • Relative humidity: 10 – 95% non-condensing
  • Material: ABS UL94-V0 Color:
  • White Frequency band: 2.45 GHz, ISM band (2400-2483 MHz)
  • Baud rate: 9 600, 19 200, 38 400, 76 800 bps
  • Number of Nodes: 100 Nodes in one wireless network Max. number of hops: 8 hops in the meshing network
System overview

A W-Modbus network consists of a single W-Modbus Gateway connected to the Modbus Client using a Modbus RTU cable and up to 100 W-Modbus Nodes, each of them connected to one Modbus Server over a Modbus RTU cable. The W-Modbus network is built on LumenRadio’s MiraMesh, a self-forming and self-healing wireless mesh technology.




The device is an “end device with internal terminal resistors”. Can this termination be switch off?

No it can not. Typical usage of the product is that the product is end of line.

Can I connect several Modbus RTU Servers (slaves) behind one W-Modbus unit?

This is possible on the W-Modbus Wall mount PRO unit.

How do I give the W-Modbus Node its Modbus ID?

The W-Modbus unit do not need any Modbus ID. It will proxy it's Modbus server (slave) ID. The third LED (bottom on Wall mount and right on DIN rail) will flash green every five seconds if the W-Modbus node fins an modbus id on the bus with a correct baud rate. It will flash red otherwise.

Does W-Modbus transfer Modbus signals wirelessly?

The W-Modbus units transfer Modbus RTU signals and not Modbus TCP.


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