Distributed Control System A powerful, modular & upgradable DCS has been designed and configured based on Siemens controller SIMATIC PCS7 ASRTX (Micro Box). Distributed I/O system ET200M can be provided for field automation. The distributed I/O can be connected via Profibus, Communication. DCS consists of controller, Power supply unit, distributed I/O, Digital Input and Output modules, Analog Input and Output module. a Demo Panel and Simatic PCS7 V9.0 Software.