ICP DAS GW-7828 Modbus RTU slave to M-Bus master gateway

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ICP DAS’s GW-7828 is a Modbus RTU slave to M-Bus master gateway. The M-Bus (Meter-Bus) is a standard for remote reading of meters. It is usable for most types of consumption meters as well as for various sensors and actuators. The product is specially designed for the M-Bus slave device. It offers Modbus RTU communication by three kinds of interface: RS-232, RS-422 and RS-485.

On hardware, the product has two rotary switches for serial port and M-Bus port baud rate. It supports Modbus RTU function code 0x03 and 0x04 to read data of M-Bus meters. Through this design, it is easy to communicate with any standard M-Bus slave.

M-Bus is a communication interface widely used for remote reading of meters such as electricity meters, water meters, heat meters, etc. It is easy to install as its two-wire system already includes power and communication function. M-Bus has its own physical layer and protocol. Therefore, it is usually required to be switched to other systems, such as Modbus, to facilitate the overall application.