Further M-Bus components
The typical application for the M-Bus is the transmission of meter data. So, meters and sensors are the most common slaves sending their data.
In some special applications there is also a demand for active controlling. Our MBUS-RELA4 is an actuator using the M-Bus to that effect.
One example is the feed-in management of decentralised renewable power plants. The M-Bus is used for meter reading and controlling the energy flow at the same time. The four relays can be used to switch the feed-in capacity of the inverter between 100% / 60% / 30% / 0%.
The MBUS-RELA4 can also be used to activate hygienic flushing according to regulations like the German Drinking Water Ordinance.
The MBUS-RELA4 acts like a normal slave on the M-Bus. It can be controlled by the master according to EN 13757-3.
There are four bistable relays inside the device which are switched corresponding to the command form the master and preserve their state also during loss of communication.
The device operates without external power supply and is directly supplied by the M-Bus. The state of the relays can be read back.