HD67671-IP-2-A1 BACnet IP slave to RS-232 Modbus master converter for automation

Industrial BACnet IP slave to RS-232 Modbus Master converter, housing type A (slim), DIN rail mount.

HD67671 allows you to connect a BACnet Master (for example a Supervisory System, etc) with some Modbus slaves. Converter is easy to configure thanks to free SW67671 software. The device functions as a BACnet IP slave on the Ethernet side and as a RS-232 Modbus master on the serial side, creating a reliable bridge between IP-based building automation systems and Modbus field devices. This design makes it an excellent choice for Building Management Systems (BMS) and industrial automation, where BACnet over IP must communicate with Modbus equipment such as sensors, controllers, or actuators that rely on RS-232 communication. The slim DIN rail housing ensures that the converter can be installed even in compact panels with limited space.

Configuration:

Thanks to the SW67671 software on your PC you can:

• Define the parameters of BACnet line
• Define the parameters of Modbus line
• Define BACnet objects that contains the data read from the Modbus slaves
• Define BACnet objects that contains the data to send to the Modbus slaves
• Update the device

Using SW67671 software, users can map RS-232 Modbus slave registers into BACnet IP slave objects with just a few steps. This mapping allows supervisory systems to access Modbus field data as if they were native BACnet points. The tool also provides firmware upgrade capability, ensuring that the converter can be kept up to date with evolving communication standards. The ease of configuration makes it particularly suitable for system integrators looking to reduce engineering time and minimize integration costs.

Characteristics:

• Up to 2000 BACnet objects (Read+Write)
• Triple isolation between BACnet - Power Supply, BACnet - Modbus, Power Supply - Modbus
• Bi-directional information exchange between BACnet bus and Modbus bus
• Mountable on 35mm Rail DIN

The HD67671 provides robust protection thanks to its triple galvanic isolation, preventing electrical disturbances from propagating between the BACnet IP network, Modbus RS-232 devices, and the power supply. The high capacity of up to 2000 BACnet objects makes it suitable for large-scale automation systems where many data points must be exchanged. With its compact form factor, the converter is also ideal for retrofits in existing installations, where adding new communication bridges can be challenging due to limited space.

Specifications:

• Ports: 2x Ethernet; 1x RS-232
• Serial protocol: RS-232 Modbus Master
• BACnet protocol: BACnet IP slave
• Data Rates Serials: Up to 115200 bps
• Data Rates BACnet: 10/100 Base-T Autosensing
• Serials connector: 3way 5mm removable screw terminal
• BACnet connector: RJ45
• Power supply: 8 ~ 24V AC; 12 ~ 35V DC
• Power supply connector: 2way 5mm terminal block
• Operating temperature: -40° to +85° (-40°F to +185°F)
• Dimensions: 120 mm x 23 mm x 107 mm (DxWxH)
• Weight: 200g approx
• Mechanical fixing: 35mm DIN Rail mount
• Software: SW67671
• ORDER CODE: HD67671-IP-2-A1

The two Ethernet ports allow the converter to be integrated flexibly into existing BACnet IP networks, while the RS-232 interface ensures compatibility with Modbus devices still in operation in many industrial facilities. Its wide operating temperature range (-40°C to +85°C) and sturdy build quality guarantee reliability even under harsh environmental conditions. The device is lightweight (approx. 200 g) but durable, designed for continuous operation in mission-critical automation systems.

Configurator – Software SW67671 FREE DOWNLOAD

---