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SAFETY OUTPUT CIRCUIT FOR A DATA PROCESSING ARRANGEMENT DELIVERING BINARY SIGNALS
SAFETY OUTPUT CIRCUIT FOR A DATA PROCESSING ARRANGEMENT DELIVERING BINARY SIGNALS
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机译:传送二进制信号的数据处理装置的安全输出电路
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摘要
The invention relates to a safety circuit for a data processing system comprising two micro computers which operate in a redundant fashion receiving similar inputs and having similar output lines conveying coincident or corresponding signals during proper operation which are indirectly connected to a common push-pull amplifier. A transformer is connected in circuit with the push-pull amplifier and a conversion circuit constructed from the flip-flop trigger elements produces a pair of signals for operating the push-pull amplifier when the signal pair logic 1 exists. When the signal pair of logic 0 exists, the push-pull amplifier does not operate. The conversion circuit operates in connection with a clock pulse current supply for the two micro computers so that in the case of malfunction, no clock pulses are produced.
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