EBV has teamed-up with ON Semiconductor and developed the Hermes M-Bus Transceiver as an EBVchip that reduces power consumption offering significant advantages. Hermes meets the M-Bus specifications in full. The new EBVchip offers space reduction, lower cost and additional functions that enable a range of attractive new designs.
This EBVchip employs a relatively complex mixed-signal design, which was developed by the former AMIS team within ON Semiconductor. As with all EBVchips, this is an official chip from the respective manufacturer designed to the corresponding quality, although it is only available worldwide from EBV Elektronik. Hermes is housed in a 4 x 4 mm QFN-20 package, thus saving a good 60% of the IC footprint compared with the previous solution, which was packaged in an SO-16.
In addition, the classic transceiver can only drive a maximum of two M-Bus loads, which means that the slaves can only draw up to 3 mA per node. With higher power consumption levels, it used to be the case that two conventional M-Bus chips had to be installed in parallel so that four M-Bus loads could be used. Hermes is designed such that up to four programmable M-Bus loads can be connected. If required, you can even connect up to six M-Bus loads to a component, although this feature is not covered in the official M-Bus standard. The M-Bus loads can be programmed with the aid of an external resistor. At 38.4 kbit/s, the useful data rate of Hermes is also significantly higher than that of the well-established M-Bus component. To produce the new EBVchip, ON Semiconductor uses a tried-and-tested automotive process to safeguard supply over a long period of time.
- Number of M-Bus loads: this new EBVchip is allowing connection to up to four M-Bus loads (actually it is supporting up to six, but unfortunately six is no longer covered by official M-Bus standard)
- Wireless M-Bus: allowing connection of external radio modules for smart grid RF and LPRF infrastructure applications with minimum drain on the battery
- Data rate: up to 38.4 Kbits/s
- Power consumption : ca.330 uA which is half compared to competitive IC
- PCB area: Saving ca. 60% of the PCB area
- Package: Hermes is available in the 4 x 4 mm QFN-20 package
- Price is tailored to the metering market and infrastructure
- Energy meters, Smart grid, high-end household E-meters and basically whole family of meters featuring M-Bus master in order that Electricity meter is serving as the central reading point for the other house energy meters like water, gas and heat.
- Calorimetric meter, water meter and gas meter which use the M-Bus (wired or wireless) infrastructure to communicate with the Master Electricity meter or Data Concentrator, which forwards the consumption data.
- Data concentrator
- MUC (Multi Utility Communication) box