Modbus RTU to BACnet MS/TP – industrial gateways for BMS and HVAC
Industrial Modbus RTU to BACnet MS/TP Converters
Modbus RTU to BACnet MS/TP converters (gateways) enable seamless and bi-directional communication between serial Modbus RTU devices and BACnet MS/TP networks. They are essential wherever PLCs, HVAC controllers, meters, and sensors need to be connected with building management systems (BMS) and supervisory networks using BACnet. By bridging these protocols, system integrators can unify legacy Modbus infrastructures with modern BACnet-based automation systems.
Modbus RTU, based on RS-485 or RS-232, is one of the most widely adopted protocols in industrial automation. It is known for its robustness, simplicity, and ability to connect multiple devices on the same bus with minimal implementation cost. BACnet MS/TP, on the other hand, is a BACnet variant using RS-485 physical layer, widely used in building automation for HVAC, lighting, energy monitoring, and security systems. A Modbus RTU to BACnet MS/TP gateway allows these two ecosystems to communicate reliably, ensuring centralized control and monitoring across industrial and building applications.
Discover our Modbus RTU to BACnet MS/TP Converters
Our Modbus RTU to BACnet MS/TP converters are designed for industrial-grade performance. They feature compact slim housings, easy DIN-rail mounting, and high EMC immunity, ensuring reliable operation in harsh conditions. With a wide operating temperature range of -40°C to +85°C, they can be installed both in hot control cabinets and outdoor enclosures exposed to frost and humidity. This versatility makes them suitable for both new installations and retrofitting existing systems.
Each gateway supports RS-232, RS-485, and Ethernet ports, depending on the model, and can operate in multiple communication modes such as: Modbus slave to BACnet MS/TP client or Modbus master to BACnet MS/TP server. This flexibility allows integrators to configure the device according to project needs, regardless of whether the supervisory system is on the Modbus or BACnet side.
Main Technical Features
- Support for up to 2000–3000 BACnet objects (read + write, depending on the model)
- Triple galvanic isolation between Modbus – BACnet – Power supply
- Serial and BACnet speeds up to 115200 bps
- Flexible power supply: 12–35 VDC or 24 VAC
- Compact dimensions: approx. 120 x 23 x 107 mm
- DIN rail mounting for easy installation
- Free configuration software (SW67671, SW67672) included
- Compliance with BACnet B-ASC and B-AAC profiles
- Selected models certified with BTL
Application Scenarios
Modbus RTU to BACnet MS/TP converters are widely used in industrial and building automation projects. Some typical applications include:
- Integration of Modbus RTU energy meters with BACnet BMS
- HVAC control – chillers, air handling units, and VRF systems via BACnet MS/TP
- Connecting Modbus PLCs to BACnet supervisory systems in commercial and industrial buildings
- Lighting, heating, and security system integration within smart buildings
- Energy monitoring and optimization across distributed infrastructures
By bridging these networks, gateways ensure real-time data exchange and unified control across heterogeneous systems. They simplify system architecture and reduce commissioning time by eliminating the need for custom protocol programming. This makes them an ideal choice for integrators seeking reliable and scalable connectivity.
Why choose our converters?
Our Modbus RTU to BACnet MS/TP gateways combine robust hardware design, intuitive software configuration, and flexibility. They are equally effective in small BMS installations and large-scale industrial automation systems. With strong galvanic isolation, wide environmental tolerance, and certification according to BACnet standards, they ensure safe, reliable, and long-term operation. Professional technical support and documentation are available to assist integrators at every project stage.
Choose the Modbus RTU to BACnet MS/TP converter that suits your requirements and explore the full technical specifications in our catalog:
