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Traffic signal system safety circuit - has two processors receiving signal state combinations for checking their reliability
Traffic signal system safety circuit - has two processors receiving signal state combinations for checking their reliability
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机译:交通信号系统安全电路-有两个处理器接收信号状态组合以检查其可靠性
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摘要
Signal condition sensors are fitted in the conducting lines carrying the control signal combinations (AK). The sensors pass the signal conditions periodically to a monitoring processor (BP). The processor (BP) undertakes a procedure testing the reliability of the signal combinations and in case of any unreliability being established gives a safety warning signal (SM1) to a safety relay. The relay passes the signal combination to an output processor (AP) which compares it with a control combination (ZK) that is, the combination required, and another warning (SM2) is given if these are different. ADVANTAGE - Improvement in reliability.
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