SIMATIC PN/J1939 LINK, network transition from Profinet to J1939 networks, IP20 As a stand-alone component, the SIMATIC PN/J1939 LINK forms a seamless transition between PROFINET and a CAN network. CAN devices that use the J1939 profile 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.