SIMATIC S7: the global benchmark for modular PLC controllers SIMATIC S7 is synonymous with innovation and quality in the modular PLC field. Decades of experience have been channeled into the SIMATIC S7 modular controllers from Siemens, with the result that the products are future-compatible, modularly expandable, vibration-resistant, maintenance-free and scalable. Our range of modular PLC controllers offers the perfect solution whatever your automation task.