HD67C09-MSTP-G43-E-B2 – BACnet MSTP Slave to MQTT Broker converter with LTE and eSIM

Industrial BACnet MSTP Slave to MQTT Broker converter with LTE and eSIM.

The HD67C09-MSTP-G43-E-B2 is an industrial converter designed to integrate devices operating as BACnet MSTP Slave on an RS485 network with modern MQTT-based IoT platforms. The device enables stable and secure publishing of BACnet MSTP data to BMS, SCADA systems and cloud applications.

The G43-E version is equipped with an LTE module supporting both a physical SIM card and an integrated eSIM. This provides enhanced flexibility and communication continuity, especially in distributed installations or locations without permanent Ethernet infrastructure, which is critical for HVAC and building automation systems.

BACnet MSTP communication is handled via an RS485 interface terminated with a 3-way 5 mm screw terminal block, supporting data rates up to 115200 bps. On the network side, the converter operates as an MQTT Broker, offering 10/100 Base-T Autosensing communication through the RJ45 Ethernet port and LTE connectivity.

Galvanic isolation between the Ethernet interface and the power supply improves system reliability and protects the device against electrical disturbances commonly found in industrial environments. The compact B2 Modulbox enclosure allows fast installation on a DIN 35 mm rail.

With compact dimensions of 70 × 60 × 95 mm and a wide operating temperature range from -40°C to +85°C, the HD67C09-MSTP-G43-E-B2 is well suited for harsh industrial conditions and space-limited control cabinets.

Key Features

• Integration of BACnet MSTP Slave with MQTT Broker.
• RS485 communication with data rates up to 115200 bps.
• Ethernet, LTE, SIM and eSIM connectivity.
• Automatic 10/100 Mbps data rate detection.
• Publishing BACnet MSTP data to IoT and cloud platforms.
• Galvanic isolation between Ethernet and power supply.
• Industrial enclosure with DIN rail mounting.

Device configuration is performed using the dedicated SW67C09 software , which allows configuration of BACnet MSTP parameters, MQTT communication, data mapping and firmware updates.

Technical Specifications

• Protocols: BACnet MSTP Slave, MQTT Broker
• Ports: 1× RS485, 1× Ethernet RJ45, SIM slot, integrated eSIM
• BACnet data rate: up to 115200 bps
• MQTT data rate: 10/100 Base-T Autosensing
• Power supply: 8…24V AC or 12…35V DC
• Power connector: 2-way 5 mm terminal block
• Operating temperature: -40°C to +85°C
• Dimensions: 70 × 60 × 95 mm (D × W × H)
• Weight: approx. 200 g
• Mounting: DIN rail
• Software: SW67C09
• Order Code: HD67C09-MSTP-G43-E-B2

The HD67C09-MSTP-G43-E-B2 is an optimal solution for projects requiring integration of BACnet MSTP Slave devices with MQTT-based platforms, particularly in distributed BMS installations and applications requiring reliable LTE communication.

Need technical support or assistance with device selection? Contact Consteel Electronics .