Two-way 169 MHz wireless M-Bus meter reading module

October 05, 2012 // By Julien Happich
Radiocrafts has announced the new expanded feature set for its 169 MHz Wireless M-Bus module for long range automatic meter reading.

The RC1700HP-MBUS4 module includes all features necessary for secure two-way communication between meter and concentrator. The module contains a Wireless M-Bus stack, supporting all physical layers, MAC layers and frame formats, transport and security layers. All critical timing for two-way communication is handled by the module, along with very low power features for extended battery lifetime.

It is fully compliant with the new prEN 13757-4:2011, operating in the new harmonized frequency band for meter reading in Europe. The combination of VHF frequency, true narrowband operation and high output power, gives superior communication range and coverage even in urban environments, claims the manufacturer. The typical range is 1.5 km in urban areas and 20-40 km in open terrain with quarter-wave antennas.

When used at the meter side, the unit provides very low current consumption in all operating modes; sleep mode, transmit mode and receive mode. The module handles reception time windows automatically, and will automatically enter sleep mode for lowest possible power consumption.

When used at the concentrator side, the device can handle 256 meters storing individual encryption keys internally, and several thousand meters by using an external host controller for expanded key memory. The module detects and checks ELL and APL encryption automatically. An automatic message generator helps to streamline the two-way communication with the meters, making it possible to communicate with thousands of meters from one concentrator.

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