system for the centralized management of control devices and applying them in a power plant by means of computer unit

摘要

A system for the centralised management of a plurality of command devices (pushbuttons/switches) (C) and actuation devices (relays) (AT) in an electrical plant. The system comprises a plurality of computerised units (10, 11) which are programmable, both locally and remotely, for the management of an unlimited number of command devices (C), each of which can be addressed to a plurality of actuation devices (AT) consisting of relays each having six functional variants. Each computerised unit (10, 11) comprises at least one dual microprocessor (MP1, MP2) which manages function inputs/outputs (I/O) which can be connected to respective command and/or actuation devices (C, AT) which can be positioned far away; the computerised units (10, 11) of the system are self-powered and may be connected together in parallel, for data exchange, by means of a bus line comprising two wires (D, -), one of which (-) is connected to earth. IMAGE