SISTEMA DI CONTROLLO DI SEQUENZA ESPANDIBILE

摘要

An expandable sequence control system including a central controller unit for sequentially controlling a plurality of I/O devices connected thereto through a plurality of I/O interface modules is disclosed herein. A terminal block is formed on each I/O interface module for connection between the interface module and the I/O devices. Each of the I/O interface modules is provided at its opposite ends with respective ports which are to be electrically coupled to the central controller unit or connected to each other by means of flexible cables. These ports of each I/O interface module are electrically interconnected through a feeder passage incorporated therein such that a desired number of the I/O interface modules can be added to the system by coupling the feeder passages thereof with the flexible cable connecting between the ports of adjacent I/O interface modules. Accordingly, a plurality of the I/O interface modules can be arranged in tandem or parallel relationship with each other depending on the requirements of a space in which the system is to be installed, giving rise to flexibility in arranging the plural I/O interface modules in a limited space.