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Modbus Gateway

The Modbus Gateway is designed for localized, industrial, or commercial installations where water meters are connected via wired communication buses (RS-485).
It serves as a protocol converter, translating the Modbus RTU/ASCII data into Modbus TCP or MQTT format for cloud integration.

Key Features (Modbus Gateway)​

  • Legacy Integration: Directly interfaces with existing and new water meters supporting the industry-standard Modbus protocol, typically over RS-485.
  • Robust & Reliable: Wired connections offer high reliability, faster data transfer, and are less susceptible to radio interference.
  • Protocol Conversion: Translates Modbus RTU/ASCII (serial) into Modbus TCP or cloud protocols (MQTT) over Ethernet or Cellular.
  • Local Density: Ideal for utility rooms, apartment complexes, or industrial facilities where meters are centrally located and can be wired together.

Technical Specifications (Modbus Gateway)​

ParameterSpecificationNotes
Meter Protocol (Inbound)Modbus RTU / ASCIICommunicates with water meters as a Modbus Master.
Physical InterfaceRS-485 Serial Port(s)Connects directly to the wired bus of the water meters.
Max Devices Supported32 slave devices per RS-485 bus segmentLimited by the Modbus protocol and cable length.
Max Distance (Approx.)Up to 1,200 meters (RS-485)The range is wired and depends on cable quality and baud rate.
Backhaul (Outbound)CellularUsed to connect to the local network or internet.
Baud Rate9600 bps (Typical), User ConfigurableStandard industrial communication speed.
Data Format8 Data bits, No Parity, 1 Stop bit (8N1)User configurable; common Modbus setting.
Power Input9–32 V DCStandard industrial power supply range.

Single-Channel Modbus Gateway​

Designed for small-scale installations, connecting water meters over a single RS-485 bus.

  • Key Features:

    • Directly interfaces with Modbus RTU/ASCII devices.
    • Robust and reliable wired communication.
    • Converts data to Modbus TCP or MQTT for cloud integration.

  • Technical Specifications:

ParameterSpecification
RS-485 Channels1
Max Devices Supported32 slave devices
Backhaul (Outbound)Cellular
Baud Rate9600 bps (typical), user configurable
Power Input9–32 V DC
EnclosureIP20 / Industrial-rated

4-Channel Modbus Gateway​

Designed for medium-to-large installations where multiple RS-485 buses are needed.

  • Key Features:
    • Supports four independent RS-485 channels.
    • Each channel can connect multiple devices, increasing total capacity.
  • Technical Specifications:
ParameterSpecification
RS-485 Channels4
Max Devices Supported128 slave devices (4 × 32 per channel)
Backhaul (Outbound)Cellular
Baud Rate9600 bps (typical), user configurable
Power Input9–32 V DC
EnclosureIP20 / Industrial-rated