HD67712-MSTP-4-A1 BACnet MSTP master to RS-485 Modbus slave converter for automation

Industrial BACnet MSTP master to RS-485 Modbus slave converter, housing type A (slim), DIN rail mount.

HD67712 is a BACnet Master / Modbus Slave Converter and it allows you to connect some BACnet slaves with a Modbus Master (for example a PLC, HMI). Converter is easy to configure thanks to free SW67712 software. The device operates as a BACnet MSTP master and a RS-485 Modbus slave, providing an efficient communication bridge between BACnet-based field devices and Modbus supervisory controllers. This is particularly useful in Building Management Systems (BMS) and industrial automation, where BACnet networks must be integrated with legacy or existing Modbus infrastructures. With a slim housing type A and DIN rail mount, the device is well-suited for compact control panels and retrofit projects.

Configuration:

Thanks to the SW67712 software on your PC you can:

• Define the parameters of BACnet line
• Define the parameters of Modbus line
• Define the BACnet data that the converter reads/writes
• Update the device

The SW67712 configuration software simplifies the process of mapping BACnet objects to RS-485 Modbus slave registers, making integration fast and reliable. Users can configure both reading and writing of BACnet data objects, ensuring that the Modbus Master can fully access the BACnet network. The intuitive user interface reduces engineering time and makes the device easy to implement even in large-scale projects. Additionally, built-in firmware update functionality ensures long-term product support and adaptability to new system requirements.

Characteristics:

• Up to 512 BACnet objects in reading and 512 objects in writing
• Triple isolation between Serial - Power Supply, Serial - Ethernet, Ethernet - Power Supply
• Bi-directional information exchange between Modbus bus and BACnet bus
• Mountable on 35mm Rail DIN

The support for up to 1024 BACnet objects (read + write) enables use in advanced BMS and SCADA installations. Triple galvanic isolation provides robust protection against ground loops and electromagnetic disturbances, ensuring stable performance even in harsh industrial environments. Thanks to its compact size and low weight (approx. 200 g), the device can be easily installed in dense control cabinets. The wide operating temperature range (-40°C to +85°C) guarantees reliability in both indoor and outdoor environments, including extreme industrial conditions.

Specifications:

• Ports: 2x RS-485; 1x Ethernet (programmable port)
• Serial protocol: RS-485 Modbus slave
• BACnet protocol: BACnet MSTP master
• Data Rates Serials: Up to 115200 bps
• Data Rates BACnet: Up to 115200 bps
• Serials connector: 3way 5mm removable screw terminal
• BACnet connector: 3way 5mm removable screw terminal
• Power supply: 8 ~ 24VAC; 12 ~ 35VDC
• Power supply connector: 2way 5mm terminal block
• Operating temperature: -40°C to +85°C (-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: SW67712
• ORDER CODE: HD67712-MSTP-4-A1

With two RS-485 ports and a programmable Ethernet port, the HD67712-MSTP-4-A1 offers excellent flexibility in deployment. The BACnet MSTP master interface enables coordination of multiple BACnet slave devices, while the RS-485 Modbus slave port ensures backward compatibility with Modbus-based control systems. This versatility makes it an essential tool for system integrators who need reliable cross-protocol communication in demanding automation environments.

Configurator – Software SW67712 FREE DOWNLOAD