Siemens

Siemens is a Germany-based multinational company in the field of electronics and electrical engineering. They offer products for industrial automation and control which are divided into a number of categories, including automation and drives, low voltage controls, and building technologies. The Siemens line of programmable controllers includes the SIMATIC S5, SIMATIC S7, S7-200, S7-300, S7-400, S7-1200, S7-1500, and the Texas Instruments 305, 405, and 505 families.