The automation system PSS 4000 stands for optimum interaction between hardware and software components, network devices and the real-time Ethernet. The system is characterised by the most varied functions and potential combinations, distinguishing it from classic automation. It has already been tried and tested in numerous applications in different industries. With the Industry-4.0-compatible automation system PSS 4000 Pilz is rigorously pursuing the modular, distributable approach. We show how the PSS 4000 can already be used to split complex, distributed systems into manageable modules.