Siemens Basic unit SIMOCODE pro S, PROFIBUS DP interface, 3UF7020-1AU01-0, 24 VDC or 110-240 V AC/DC Siemens, Made in Germany. The Siemens SIMOCODE Pro S Basic Unit 3UF7020-1AU01-0 is for controlling and protecting electric motors. It’s combines a motor starter with a programmable logic controller-PLC, and offers a Profibus DP interface for with automation control systems.