CIRCUIT FOR CARRYING OUT SECURED DATA TRANSMISSION, ESPECIALLY IN RING BUS SYSTEMS

摘要

The invention relates to a circuit which enables data required for constructing failure tolerant structures to be transmitted on ring standard bus systems. To this end, a monitoring unit is required as well as decentralized input and output units which transmit or receive data used for regulating or controlling. The inventive circuit takes over the task of identifying possible faults which can jeopardize the process within a machine or system. Due to the internal structure, the circuit identifies a possible fault even before the fault with regard to the process is disclosed and initiates a secured disconnection. As a result, it is irrelevant whether the external control or the utilized bus system is responsible for creating the fault.