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Wireless M-BUS is a communication protocol defined by EN 13757-4 (Physical and Data Link Layer) and EN 13757-3 (Application layer) international standards, which is mainly intended for radio transmission of remote meter readings of data ​​from consumption meters and sensors. The Wireless M-BUS protocol (hereinafter referred to as “WMBUS”) is based on the definition of the M-BUS standard (from the M-BUS standard it adopts the application layer (i.e., the description of the data encoding), but is designed for data transmission via radio signal. The WMBUS communication is performed on the Master-Slave basis, where “Master” is the device that collects the data and “Slave” is the device that provides the data (an integrated or external radio module that transmits data from the meter/sensor). The WMBUS communication protocol defines several communication modes (unidirectional or bidirectional). The WB169-MM works in a unidirectional N1 mode, where the communication is performed in such a way that the “Slave” device transmits data at regular intervals and the “Master” only receives them.

Battery powered Wireless M-BUS pulse converter. It is used for the reading the status of two consumption meters with RS-485 output and subsequent sending of such data in the Wireless M-BUS format.
The WB169-R4B-H module is designed for remote reading of data from electronic consumption meters (meters, calorimeters) equipped with RS-485 bus data output and IEC 62056 standard encoding, which is used mainly in the field of electric energy consumption meter reading. The module is equipped with RS-485 bus type input, which can connect to up to two consumption meters of various types. The module reads data from the connected consumption meters via the RS-485 bus interface and sends them in the form of wireless M-BUS radio messages (hereinafter referred to as the “information message”). Each information message contains the following types of data:

  • consumption meter identification data
  • the values of two consumption meter registers (e.g. “high tariff” and “low tariff”)
  • module operating data (internal battery voltage, processor temperature, etc.)