SIMATIC PN/M-Bus LINK network transition from Profinet to M-Bus networks, M-Bus Master, IP20 As an independent component, the SIMATIC PN/M-Bus LINK forms a seamless transition between PROFINET and an M-Bus network. BACnet devices can thus be easily connected to a PROFINET network in order to communicate with SIMATIC components. This opens up a wide range of possibilities for the simple implementation of modern production concepts, even for existing systems and machines.