HD67G08-2-B2 Modbus Slave to HTTP/REST Server converter RS232

HD67G08-2-B2 connects Modbus Slave RS232 devices with HTTP/REST Server communication via Ethernet.

HD67G08-2-B2 is an industrial ADFweb converter designed to connect devices operating as Modbus Slave on the RS232 side with systems and applications based on HTTP/REST Server communication. This model is a practical solution wherever classic serial communication must be integrated with Ethernet infrastructure and modern data publishing in industrial networks.

From an integration perspective, HD67G08-2-B2 works as a stable bridge between Modbus Slave RS232 devices and an HTTP/REST Server environment. It fits well in industrial automation, telemetry systems, building automation, monitoring applications and service environments where reliable serial-to-Ethernet communication is required.

The device is designed for industrial operation. It provides electrical isolation between Ethernet and power supply, mounting on a 35 mm DIN rail, a wide 12..35V DC / 8..24V AC power supply range and an operating temperature range of -40°C to +85°C. The compact housing type B makes installation easy inside control cabinets, while the power consumption of approximately 5 W/VA at 24V DC supports straightforward panel power planning.

On the hardware side, the unit is equipped with 1 RS232 port with a 3-way 5 mm terminal block and 1 RJ45 Ethernet port. The Ethernet port is used both for programming the device and for actual HTTP/REST communication. Ethernet communication works at 10/100 Base-T Autosensing, and the recommended Ethernet cable is at least Category 5E with a maximum length of 100 m.

On the RS232 side, the converter supports transmission speeds up to 115200 bps. The manufacturer recommends using a Null Modem cable, and the suggested cable length should not exceed 15 meters. These parameters make the converter suitable for a wide range of industrial, integration and service applications.

The converter includes four status LEDs that indicate device state, Modbus communication, HTTP/REST activity and error status. In addition, the module is equipped with a Recovery button, which allows the device to enter recovery mode in case of firmware or configuration issues. This is an important feature in industrial applications where quick service recovery matters.

Configuration is carried out using SW67G08, which allows the user to define HTTP/REST parameters, configure Modbus line settings, define the list of HTTP/REST clients communicating with Modbus Masters and configure endpoints. The software also allows device updates and adaptation of the converter to the requirements of a specific industrial application.

Product features

• industrial Modbus Slave / HTTP/REST Server converter;
• 1x RS232 serial port and 1x RJ45 Ethernet port;
• Modbus Slave communication on the serial side;
• HTTP/REST Server communication on the Ethernet side;
• RS232 data rate up to 115200 bps;
• 10/100 Base-T Autosensing Ethernet communication;
• electrical isolation between Ethernet and power supply;
• 35 mm DIN rail mounting;
• 4 status LEDs and Recovery button;
• configuration and update via SW67G08.

Technical specification

• Model: HD67G08-2-B2
• Device type: Modbus Slave / HTTP/REST Server - Converter, Port RS232
• Ports: 1xSerial; 1xEthernet
• Serial protocol: Modbus Slave
• Ethernet protocol: HTTP/REST Server
• RS232 connector: 3way 5mm terminal block
• HTTP/REST connector: RJ45
• Data rates RS232: up to 115200 bps
• Data rates HTTP/REST: 10/100 Base-T Autosensing
• Power supply: 12..35V DC / 8..24V AC
• Power consumption: 5 W/VA at 24V DC
• Power supply connector: 2way 5mm terminal block
• Operating temperature: -40°C to +85°C
• Dimensions: 71x60x95 mm
• Housing: PVC
• Weight: 200 g approx
• Mechanical fixing: 35 mm DIN rail mounting
• Software: SW67G08
• Order code: HD67G08-2-B2

If you need a reliable way to connect Modbus Slave devices on the RS232 side with HTTP/REST Server communication in industrial environments, HD67G08-2-B2 is a strong choice for modern automation, system integration and telemetry projects.