Description
PRACTICAL DATA TRANSMISSION VIA RADIO NETWORK
The radio devices of the DFM family (DFM 433, DFM-E 433, DFM-EA 433) allow an easy setup of radio paths for the connection of measuring spots to a central data acquisition. They can also be used as a cost efficient alternative instead of a complicated cable setting for example in between the sensor and the data collection station (e.g. water level station).
FIELDS OF APPLICATION
As a replacement for cables, the DFM can do the transmission of the measuring data for example of a water level or a discharge measurement from the bridge to the switch cabinet. Similarly the measuring data of wind speed and direction of a wind sensor on a supporting mast of a ski lift can be transmitted to the bottom station. Another example would be the radio data transmission from several automatic weather stations spread over an area to the central data acquisition. For even farther measuring stations, or when unsuitable landforms (mountains) interfere, the measuring data are transmitted over existing stations to the central station (repeater mode). Therefore, the establishment of whole radio networks is possible.
IMPLEMENTATION
With the analogue, digital and serial inputs and outputs the DFM radio devices are highly flexible when it comes to data transmission. For uncomplicated data transmission via serial interface the DFM operates in the transparent radio mode. The data input over the serial interface is received without additional effort for the protocol or command. A solar power panel mostly supplies sensor and radio device, the DFM is usually installed on a top-hat rail in a switch cabinet.
