HD67934-4-B2 Industrial Modbus Slave to MQTT Converter with TLS/SSL and Sniffer Mode

Industrial Modbus slave to MQTT converter, housing type B (wide), DIN rail mount.

HD67934-4-B2 is a high-performance industrial gateway designed to seamlessly integrate Modbus Slave devices with the IoT ecosystem using the MQTT protocol. It enables both publishing and retrieving data from an MQTT Server via a Modbus Master, such as PLC, SCADA systems, or building management systems. Additionally, the device supports an advanced Sniffer mode, allowing non-intrusive monitoring of an existing Modbus network without modifying its configuration. This feature is particularly useful for diagnostic applications, predictive maintenance, and system performance analysis.

The gateway ensures full compatibility with IoT servers and brokers supporting MQTT, whether deployed locally or in the cloud. Its TLS/SSL encryption support guarantees secure communication, meeting modern cybersecurity standards in industrial environments. The unit supports Modbus data rates of up to 115200 bps and offers auto-sensing Ethernet speeds (10/100 Base-T), allowing quick adaptation to various network infrastructures. These capabilities make it an ideal solution for secure industrial data acquisition and transmission.

With its robust type B housing and DIN 35 mm rail mount design, the HD67934-4-B2 is suitable for installation inside control cabinets and industrial enclosures. The wide operating temperature range of -40°C to +85°C enables reliable operation in harsh environments such as outdoor facilities or manufacturing plants with significant temperature fluctuations. Configuration is made easy using the free SW67934 software, which provides a user-friendly interface for setting communication parameters and updating device firmware.

Configuration:

Using the SW67934 software on your PC, you can:

• Set MQTT connection parameters, including server address, port, authentication, and topics
• Configure Modbus line settings such as baud rate, parity, stop bits, and response timeout
• Define MQTT topics for publishing and subscription
• Enable Sniffer mode to passively capture Modbus network traffic
• Update device firmware to add new functions and improve performance

Characteristics:

• Electrical isolation between Ethernet and Modbus interfaces
• Easy installation on a standard 35 mm DIN rail
• Wide power supply input range: 18...35V DC and 8...24V AC
• High immunity to electromagnetic interference (EMI)
• Compact and durable construction for industrial environments

Specifications:

• Ports: 1x Ethernet, 1x RS-485
• Serial port protocol: Modbus Slave (RS485)
• Ethernet protocol: MQTT
• Ethernet connector: RJ45
• Modbus connector: 2-way 5 mm terminal block
• Modbus data rate: up to 115200 bps
• MQTT data rate: 10/100 Base-T with auto-sensing
• Power supply: 8…24VAC / 12…35VDC
• Power connector: 3-way 5 mm terminal block
• Operating temperature: -40°C to +85°C
• Dimensions: 60 mm x 36 mm x 95 mm (DxWxH)
• Weight: approx. 200 g
• Mounting: DIN rail
• Software: SW67934
• Order code: HD67934-4-B2

The HD67934-4-B2 is ideal for remote monitoring, energy management systems, industrial automation, and predictive maintenance applications. Its Sniffer mode allows non-disruptive modernization of existing Modbus installations without downtime.

Configurator – Software SW67934 FREE DOWNLOAD

Manufacturer's warranty: 24 months