USB to M-Bus Master Converter | 350 Loads | Full Isolation | 1KM

Industrial USB to M-Bus Master Converter — Full Isolation, 350 Loads, Up to 1KM Range

Take full control of your utility meter data acquisition network with this rugged, fully isolated USB to M-Bus Master module. Engineered for industrial environments, it supports up to 350 standard M-Bus slave devices, a communication range of up to 1KM, and baud rates from 300 to 19200bps — making it ideal for smart water meters, gas meters, heat meters, and more. Made in Mainland China.

Key Features

• Full Galvanic Isolation: Complete USB-to-M-Bus isolation with a withstand voltage of 1.5KV, protecting both your PC and field devices.
• Supports Up to 350 Loads: Handles approximately 350 standard M-Bus slave devices based on load specifications.
• Long Communication Distance: Reaches up to 1KM with a communication error rate of less than 1 in 10,000.
• Wide Baud Rate Range: 300bps–9600bps standard, adaptable up to 19200bps.
• USB Hot-Swappable: Safe, stable plug-and-play operation — no system restart required.
• USB-B Connector: Heavy-duty USB-B type interface built to withstand frequent connection cycles.
• Dual Power Modes: Operates via USB power (4.5V–5.2V) or external supply (12V–30V, typical 24V).
• Anti-Reverse Connection: External power supply features reverse-polarity protection for added safety.
• Short-Circuit Protection: Low-power consumption design with built-in short-circuit and overload protection.
• Very Low Bus Parasitic Capacitance: Maximum 1nF — ensures clean waveform integrity across all baud rates, with or without load.
• ESD Protection: Human Body Model (HBM) electrostatic discharge rating of typical 2KV.
• Universal Windows Compatibility: Works with all Windows operating systems including Windows 11.
• Compact & Portable: Slim enclosure design is easy to carry for on-site deployment and field debugging.

Technical Specifications

USB Power Supply Parameters

• USB Voltage: 4.5V – 5.2V (typical 5V)
• USB Static Current: typical 300mA, max 320mA
• USB Overload Action Current: min 450mA
• USB Power M-Bus Output Current: max 50mA
• M-Bus High Level (USB): 35V – 37V (typical 36V)
• M-Bus Low Level (USB): 25V – 27V (typical 26V)

External Power Supply Parameters

• External Supply Voltage: 12V – 30V (typical 24V)
• External Static Current: typical 35mA
• M-Bus Protection State Current: min 35mA
• M-Bus High Level: 35V – 37V (typical 36V)
• M-Bus Low Level: 25V – 27V (typical 26V)

Overall Module Parameters

• M-Bus Overload Protection Action Current: min 600mA
• Communication Baud Rate: 300bps – 19200bps
• Operating Temperature: -30°C to +80°C
• Storage Temperature: -40°C to +125°C
• Bus Parasitic Capacitance: max 1nF
• Communication Distance: max 1KM
• USB/M-Bus Isolation Withstand Voltage: typical 1.5KV
• ESD (HBM): typical 2KV

Application Fields

• Smart water meter, gas meter, and heat meter data acquisition systems
• Intelligent sensor network applications using M-Bus
• Central air conditioning control and M-Bus data acquisition
• Smart home automation and fire alarm/linkage networks
• Industrial safety systems and one-way detonation control with M-Bus
• Intelligent power grid remote meter-reading infrastructure

Package Includes

• 1× USB to M-Bus Master Module

Note: Due to lighting and screen differences, the actual item color may vary slightly from the product images. Please allow 1mm–1cm tolerance due to manual measurement.

For more information on industrial communication standards and data acquisition best practices, visit the NIST Smart Grid Resource.

Frequently Asked Questions

Q: How many M-Bus slave devices can this USB to M-Bus master module support?

A: This USB to M-Bus master module can accommodate up to approximately 350 standard M-Bus slave devices based on the load specification, making it well-suited for large-scale meter reading and industrial data acquisition networks.

Q: Does this module work with Windows 11?

A: Yes, the module is compatible with all Windows operating systems, including Windows 11, Windows 10, Windows 8, and Windows 7. Plug-and-play USB hot-swap support makes setup straightforward without requiring a system restart.

Q: Can this converter be powered by an external supply instead of USB?

A: Absolutely. The module supports both USB power (4.5V–5.2V) and an external DC power supply (12V–30V, typical 24V). The external supply mode also includes anti-reverse connection protection, making it safe and reliable for permanent industrial installations.

Q: What is the maximum communication distance supported by this M-Bus master converter?

A: The module supports a maximum communication distance of 1KM (1000 meters). At this range, the communication error rate is less than 1 in 10,000, ensuring highly reliable data acquisition even over long cable runs.