RS485 Modbus
IoT gateway
A Modbus RTU and Modbus TCP gateway for RS485 and Ethernet, working as master or slave. Integrators set the register map from the cloud application, and the gateway delivers the data over TLS 1.2 to RIOD Live or your own platform.
WHY WE BUILT IT
Every site visit to change a register map is a visit you could skip
Integrators know the pattern. A meter, a drive and a chiller controller each hold the values the customer wants, in Modbus registers with their own addresses, data types and scaling. The gateway gets configured on site with a laptop. Then the customer adds a device or wants one more value, and someone drives back.
We moved that configuration into the cloud. Register maps are defined in the cloud application, mainly by system integrators, and the gateway picks them up remotely. The same gateway can poll devices as a Modbus master, or sit on an existing network as a slave when a PLC or BMS already owns the bus.
HOW IT WORKS
Built for the person commissioning the panel
RTU over RS485, TCP over Ethernet
Serial field devices and networked controllers can share one gateway. That suits panels where older meters sit on RS485 next to a newer controller on Ethernet.
Master or slave
As master the gateway polls the devices you list. As slave it joins a network that another system already controls, so it fits into an existing installation without taking the bus over.
Register maps from the cloud
Addresses, data types, scaling and names are set in the cloud application. When a device is added or a map changes, the update reaches the gateway remotely.
Secure delivery to your platform
Collected data leaves over TLS 1.2, with MQTT over TLS 1.2 where MQTT is used. It lands in RIOD Live for dashboards, rules and reports, or on your own server.
AT A GLANCE
Modbus gateway specification
- Protocols
- Modbus RTU and Modbus TCP
- Interfaces
- RS485 and Ethernet
- Modes
- Master or slave configuration
- Configuration
- Register mapping configured from the cloud application, usually by the system integrator
- Security
- TLS 1.2 on all communication, MQTT over TLS 1.2 where applicable
- Power and enclosure
- 12 V adapter, battery variants on request. Plastic, metal or custom enclosure
- Engineering notes
- Bus layout, register maps and device count are confirmed per site during commissioning
APPLICATIONS
Equipment the gateway connects
- PLC to cloud data collection
- Water treatment plant Modbus monitoring
- Wastewater plant monitoring
- Industrial pump station connectivity
- VFD and motor drive monitoring
- Chiller plant Modbus integration
- Boiler controller monitoring
- Compressor controller integration
- Energy meter data concentrator
- Solar inverter Modbus monitoring
- Generator controller gateway
- Manufacturing OEE data acquisition
- Building management system data bridge
- Industrial refrigeration monitoring
- Special-purpose equipment cloud gateway
GUIDES
Application guides
- PLC to cloud data collection
- Water treatment plant Modbus monitoring
- Wastewater plant monitoring
- Industrial pump station connectivity
- VFD and motor drive monitoring
- Chiller plant Modbus integration
- Boiler controller monitoring
- Compressor controller integration
- Energy meter data concentrator
- Solar inverter Modbus monitoring
- Generator controller gateway
- Manufacturing OEE data acquisition
- Building management system data bridge
- Industrial refrigeration monitoring
- Special-purpose equipment cloud gateway
FAQ
Questions buyers ask us
Does the RS485 Modbus IoT gateway support both Modbus RTU and Modbus TCP?
Yes. It handles Modbus RTU over RS485 and Modbus TCP over Ethernet, so serial meters and networked controllers can report through the same gateway. Both work in master or slave configuration.
How is the Modbus register map configured?
Register maps are configured in the cloud application, usually by the system integrator. The gateway receives the configuration remotely, so adding a device or a register is done from a browser rather than on site.
Can the gateway join a Modbus network that a PLC or BMS already controls?
Yes. In slave mode the gateway sits on an existing network without taking over the bus. In master mode it polls the devices you list. We confirm which mode suits the panel during commissioning.
Can the Modbus data go to our own SCADA or cloud instead of RIOD Live?
Yes. The gateway sends data over TLS 1.2 to RIOD Live or to your own server, and data can be passed into SCADA, BMS or analytics systems through an API. Give us the server details and we configure the platform there.
Have a panel full of Modbus devices?
Send us the device list and the registers you need. We will confirm the gateway setup and how quickly your integrators can bring it online.