The KL6781 M-Bus master terminal, in its compact 12 mm housing, enables direct connection of up to 40 M-Bus devices, each with 1.5 mA current consumption. To connect additional devices beyond that limit, users simply install another KL6781 in the Bus Terminal node. The M-Bus master terminal converts the data from the internal terminal bus into M-Bus-compliant values.
A total of 24 bytes of data per terminal are available for this purpose.
The TwinCAT PLC M-Bus software library, which is available free of charge from Beckhoff, simplifies the integration of M-Bus devices from numerous manufacturers through predefined profiles.
In addition to building automation, the M-Bus solution can also be used in machine construction and plant engineering applications, where consumption meters with the M-Bus interface can be used for logging load peaks, for example.
The M-Bus terminal extends the Beckhoff all-in-one I/O solution with yet another useful component. With more than 400 different signal types, the Beckhoff Bus Terminal system covers virtually all signal types encountered in building services engineering. It not only supports all common sensors and actuators, but can also integrate all bus systems that are relevant for building services using suitable Bus Coupler types. Subordinate subsystems such as KNX/EIB, LON, DALI, MP-Bus, EnOcean or serial RS232/RS485 connections such as Modbus can be integrated easily via communication Bus Terminals.
Beckhoff is bringing a compact solution for energy data acquisition onto the market in the KL6781 M-Bus master terminal: electricity, water or gas meters with an M-Bus interface are simply integrated into the fieldbus-independent Bus Terminal system, making external M-Bus gateways superfluous. The energy consumption of a building can be significantly optimised on the basis of the exact acquisition of energy consumption data.