Siemens

Siemens is a Germany-based multinational company in the field of electronics and electrical engineering.

They offer products for information and communications; automation and control, which includes three groups: automation and drives, industrial solutions and services, and Siemens building technologies.

The Siemens line of PLC includes the SIMATIC S5, S5-095U, S5-100U, S5-110, S5-115, S5-135, S5-150, S5-155, SIMATIC PCS 7, S7-200, S7-1200, S7-300, S7-400, and the TI 505 products.