Wireless Modbus-RTU Transceiver – AcuMesh

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AcuMesh - front view.
AcuMesh - right quarter angle view.
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WIRELESS MODBUS-RTU
TRANSCEIVER

Create a Wireless Mesh Network using existing Modbus-RTU devices. Designed for Modbus-RTU devices with an RS485 port, multiple AcuMesh wireless Modbus-RTU transceivers form a point-to-multipoint wireless mesh network that monitors energy flow, industrial processes, HVAC, security systems, or other services across commercial and industrial facilities where physical wire installation is impractical. Used in new or retrofit applications, AcuMesh can reduce high installation cost.

  • Compatible with Modbus-RTU protocol
  • Creates a wireless mesh network
  • Connects to meters, sensors, or any other device with an RS485 port
  • Mesh structure enables robust, wireless Modbus-RTU communications
  • Wide range: 1000ft (305m) / 4 miles (6.5km) outdoors in a single hop
  • Communication pathway is automatically optimized to create a superior, wireless network
  • AcuMesh transceivers automatically connect to each other without any special configuration
  • 128-bit Advanced Encryption Standard (AES) provides added security
  • Advanced configuration options available for complex networks using free, easy-to-use software
  • Available in both 900MHz or 868MHz frequency for worldwide compatibility

AcuMesh Overview

Wireless Modbus-RTU for Any Device

Modbus-RTU is a standard industrial protocol usually used over a wired serial interface, such as RS485. A wireless Modbus-RTU device can be used to solve the inherent limitations of traditional Modbus-RTU devices that use a serial interface. It does this by connecting an RS485-to-wireless mesh converter specifically designed for Modbus-RTU devices to form a node on a wireless mesh network.

What is a Wireless Mesh Network

A WiFi mesh network is a interconnection of devices that are capable of point-to-multipoint wireless communication. Each device is a single node that can talk to other devices bypassing walls or across long distances where ordinary, wired RS485 networks would face serious limitations.

AcuMesh - Wireless Modbus-RTU.

AcuMesh Main Features

AcuMesh - Mesh Network.

MESH NETWORK

Each AcuMesh device is a single node point in the wireless mesh network broadcasting robust, point-to-multipoint communication. Each device is connected to each other allowing the network to self-heal and optimize the best communication pathway for a more reliable data transmission.

Key Specifications:

  • Easy to install, maintain, and upgrade
  • Optimized communication pathways for fast data delivery
  • Add more nodes for more flexible, expanded coverage
  • Rapid deployment and faster development cycles
  • Self-healing improves data transmission reliability if a node goes down
AcuMesh - RS485 to Mesh.

RS485-TO-WIRELESS MESH

Eliminate complex wiring by adding an AcuMesh wireless RS485 transceiver to any device with an RS485 port. Like physical wiring, multiple devices can be daisy-chained to a single AcuMesh transceiver for added convenience.

Key Specifications:

  • Device independent, any Modbus-RTU device with an RS485 port can be equipped
  • Ideal for both slave devices (e.g. meters or sensors) and master devices (e.g. data acquisition hardware, PLCs, or computers)
  • Reduced costly network installation from a wired RS485 network
  • Flexible network with low dependence on existing infrastructure
AcuMesh Advantage Over Competing Technologies
AcuMeshZigbeeWiFi
Dependent on existing IT network rangeNoNoYes
Runs through wallsYesNoYes
Range (Line of Sight)6,437 Meters20 Meters100 Meters
Mesh StructureYesYesNo

LONG RANGE COMMUNICATION

The wireless RS485 AcuMesh transceiver supports long-range communications, up to 100ft (305m) indoors or 4 miles (6.5km) outdoors.

Key Specifications:

  • Ideal for multi-story buildings or multi-building campuses
  • Additional AcuMesh transceivers strengthens the mesh network
  • Stand-alone AcuMesh transceivers can be added as repeaters to cover long distances
AcuMesh - Easy Configuration.

EASY NETWORK CONFIGURATION

The AcuMesh transceiver works automatically upon power-up and without the need for advanced software setup.

Key Specifications:

  • Connect the transceiver to a Modbus-RTU device to begin transmitting wireless RS485 data
  • Self-optimizing mesh network finds the best communication pathways, outperforming traditional WiFi-router setups.
  • Does not rely on existing WiFi infrastructure, allowing it to operate independently from other building networks.
AcuMesh - Cybersecurity.

SECURE, WORLDWIDE COMMUNICATIONS

Cybersecurity is a top priority at industrial, utilities, and commercial facilities. AcuMesh is engineered to maintain rigorous data security at any facility worldwide.

Key Specifications:

  • 128-bit Advanced Encryption Standard (AES)+
  • Choice of 900MHz or 868MHz frequencies for compatibility in nearly any country or region
AcuMesh - Mesh Network Icon.
Mesh Network
AcuMesh - Mesh Network.

MESH NETWORK

Each AcuMesh device is a single node point in the wireless mesh network broadcasting robust, point-to-multipoint communication. Each device is connected to each other allowing the network to self-heal and optimize the best communication pathway for a more reliable data transmission.

Key Specifications:

  • Easy to install, maintain, and upgrade
  • Optimized communication pathways for fast data delivery
  • Add more nodes for more flexible, expanded coverage
  • Rapid deployment and faster development cycles
  • Self-healing improves data transmission reliability if a node goes down
AcuMesh - RS485 to Mesh Icon.
RS485-to-Mesh
AcuMesh - RS485.

RS485-TO-WIRELESS MESH

Eliminate complex wiring by adding an AcuMesh wireless RS485 transceiver to any device with an RS485 port. Like physical wiring, multiple devices can be daisy-chained to a single AcuMesh transceiver for added convenience.

Key Specifications:

  • Device independent, any Modbus-RTU device with an RS485 port can be equipped
  • Ideal for both slave devices (e.g. meters or sensors) and master devices (e.g. data acquisition hardware, PLCs, or computers)
  • Reduced costly network installation from a wired RS485 network
  • Flexible network with low dependence on existing infrastructure
AcuMesh - Superior Communication Icon.
Superior Communication
AcuMesh Advantage Over Competing Technologies
AcuMeshZigbeeWiFi
Dependent on existing IT network rangeNoNoYes
Runs through wallsYesNoYes
Range (Line of Sight)6,437 Meters20 Meters100 Meters
Mesh StructureYesYesNo

LONG RANGE COMMUNICATION

The wireless RS485 AcuMesh transceiver supports long-range communications, up to 100ft (305m) indoors or 4 miles (6.5km) outdoors.

Key Specifications:

  • Ideal for multi-story buildings or multi-building campuses
  • Additional AcuMesh transceivers strengthens the mesh network
  • Stand-alone AcuMesh transceivers can be added as repeaters to cover long distances
AcuMesh - Easy Configuration Icon.
Easy Configuration
AcuLinkAcuMesh - Easy Configuration.

EASY NETWORK CONFIGURATION

The AcuMesh transceiver works automatically upon power-up and without the need for advanced software setup.

Key Specifications:

  • Connect the transceiver to a Modbus-RTU device to begin transmitting wireless RS485 data
  • Self-optimizing mesh network finds the best communication pathways, outperforming traditional WiFi-router setups.
  • Does not rely on existing WiFi infrastructure, allowing it to operate independently from other building networks.
AcuMesh - Cyber Security Icon.
Cybersecurity
AcuMesh - Cybersecurity.

SECURE, WORLDWIDE COMMUNICATIONS

Cybersecurity is a top priority at industrial, utilities, and commercial facilities. AcuMesh is engineered to maintain rigorous data security at any facility worldwide.

Key Specifications:

  • 128-bit Advanced Encryption Standard (AES)+
  • Choice of 900MHz or 868MHz frequencies for compatibility in nearly any country or region

Network Architecture

AcuMesh Network Architecture.

AcuMesh Product Map

AcuMesh Product Map.
1

Antenna

2.1 dB whip antenna (included)

4

Power Connection

24Vdc (power supply included)

2

Indicator LEDs

Received Signal Strength Indicator (RSSI)

5

RS485 Connection

Connects to any Modbus-RTU device with an RS485 port

3

USB Port

USB Mini-B for power supply and/or configuration

6

DIN Rail Mountable

Secures to standard TS35 DIN Rail

1

Antenna

2.1 dB whip antenna (included)

2

Indicator LEDs

Received Signal Strength Indicator (RSSI)

3

USB Port

USB Mini-B for power supply and/or configuration

4

Power Connection

24Vdc (power supply included)

5

RS485 Connection

Connects to any Modbus-RTU device with an RS485 port

6

DIN Rail Mountable

Secures to standard TS35 DIN Rail

AcuMesh Models

AcuMesh-L-868
AcuMesh-L-900
Supported Topologies Mesh, point-to-point, point-to-multipoint, peer-to-peer
Protocol Modbus-RTU
Connection RS485 screw terminal, USB mini-B (for power supply and/or configuration)
Encryption 128-bit Encryption Standard (AES)
Mounting DIN Rail or Wall Mount
Compatible Regions Europe, Middle East, Africa, Parts of Asia. International Telecommunication Union Region 1 North & South America, Oceania, Parts of Asia. International Telecommunication Union Region 2 & 3
Operating Frequency 863 to 870 MHz
Configurable Band
902 to 928 MHz
900 MHz ISM Band
Indoor/Urban Range Up to 275' (84m) Up to 1000' (305m)
Outdoor RF Line-of-Sight Range Up to 2.6 miles (4.2km) with 2.1 dBi antenna Up to 4 miles (6.5km) with 2.1 dB dipole antennas
Indoor/Urban Range 30 Channels
Listen Before Talk (LBT) +
Automatic Frequency Agility (AFA)
64
Certifications ETSI (Europe) United States: FCC Part 15.247
Industry Canada (IC)
Australia: C-Tick
AcuMesh-L-868
Supported Topologies Mesh, point-to-point, point-to-multipoint, peer-to-peer
Protocol Modbus-RTU
Connection >RS485 screw terminal, USB mini-B (for power supply and/or configuration)
Encryption 128-bit Encryption Standard (AES)
Mounting DIN Rail or Wall Mount
Compatible Regions Europe, Middle East, Africa, Parts of Asia. International Telecommunication Union Region 1
Operating Frequency 863 to 870 MHz
Configurable Band
Indoor/Urban Range Up to 275' (84m)
Outdoor RF Line-of-Sight Range Up to 2.6 miles (4.2km) with 2.1 dBi antenna
Indoor/Urban Range 30 Channels
Listen Before Talk (LBT) +
Automatic Frequency Agility (AFA)
Certifications ETSI (Europe)
AcuMesh-L-900
Supported Topologies Mesh, point-to-point, point-to-multipoint, peer-to-peer
Protocol Modbus-RTU
Connection RS485 screw terminal, USB mini-B (for power supply and/or configuration)
Encryption 128-bit Encryption Standard (AES)
Mounting DIN Rail or Wall Mount
Compatible Regions North & South America, Oceania, Parts of Asia. International Telecommunication Union Region 2 & 3
Operating Frequency 902 to 928 MHz
900 MHz ISM Band
Indoor/Urban Range Up to 1000' (305m)
Outdoor RF Line-of-Sight Range Up to 4 miles (6.5km) with 2.1 dB dipole antennas
Indoor/Urban Range 64
Certifications United States: FCC Part 15.247
Industry Canada (IC)
Australia: C-Tick

AcuMesh Accessories

Magnetic Mount Antenna.
Magnetic Mount Antenna

The AcuMesh transceiver supports a 2db Magnetic Mount Antenna with 3 meter extension cable to maximize reception. Magnetic mounting is ideal for securing outside metal cabinets.

AcuMesh FAQ

What protocol does the AcuMesh transceiver support?

AcuMesh transceiver is compatible with Modbus-RTU over RS485.

Which model is a transmitter, receiver and repeater?

Typically, a transmitter, receiver, and repeater are separate units in a wireless system. Unlike other wireless solutions, AcuMesh wireless transceiver has all three functions built in, so it works as transmitter, receiver and repeater from every single unit. The transceiver will automatically switch roles in the system. Each unit is capable of connecting to either master or slave RS485 devices to send and receive data/commands, and broadcast or repeat the command until every transceiver in the field is connected.

Can I connect more than one unit to one AcuMesh transceiver?

Yes, just like physical wire where you directly connect a daisy chain of RS485 devices to another unit or master device. One AcuMesh transceiver is connected at the end of one chain of RS485 devices, and another transceiver connect to another group of device or master device.

Do you need to assign an address to each transceiver?

Since AcuMesh works via transparent communication, it does not add or modify Modbus-RTU protocol. Think of it as operating the same as a wired Modbus-RTU connection. A master device, whether it is a data acquisition server, a computer running master software, or a PLC will remain the same without any separate configuration required for the wireless connection. RS485 slave devices or sensors maintain their settings as well, such as Device ID.

How many AcuMesh transceivers can I connect in one network?

There is no limit to the number of AcuMesh transceivers that can be added to a single wireless mesh network. The limitation is imposed by the Modbus-RTU protocol. For example, Modbus-RTU daisy chain topology has a limit of 32 devices without a repeater.

Our application requires multiple groups of wireless networks, and they cannot interfere with each other or communicate with each other. Can the networks be configured this way?

Yes. The AcuMesh transceiver uses a default channel out of the box; you won’t need to do any additional configuration to connect all devices within a single network. If you need multiple networks that are separate from each other, simply configure a different channel name for the transceivers in the second network group. AcuMesh transceivers will only identify other devices with the same channel name. Additionally, each channel allows for a separate password for better security and management.

View all AcuMesh FAQs