Siemens Ltd. Manufactures Easy to use Basic Programmable Logic Controller. Siemens Ltd. Also offers other products relating to Automation And Control, Information And Communication, Medical, Power Supply, Power Generation, Power Transmission And Distribution Dc Drives etc. Easy to use Basic Programmable Logic Controller comprises of the HMI, the CPU, signal modules, communication interface and required software. The Easy to use Basic Programmable Logic Controller is modular and compact, versatile, a secure investment, and is powerfully fit for a full range of applications. The Easy to use Basic Programmable Logic Controller has A scalable and flexible communication interface that fulfills the highest standards of industrial communication and a full range of powerful integrated technology functions which make this controller an integral part of a complete and comprehensive automation solution. The CPUs comes in three different models, CPU 1211C, CPU 1212C and CPU 1214C, that may each be expanded to exactly fit machine requirement.