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    • 5. 发明申请
    • DIAGNOSTIC CIRCUIT
    • 诊断电路
    • WO2006102316A2
    • 2006-09-28
    • PCT/US2006010217
    • 2006-03-20
    • ROBERTSHAW CONTROLS COALVORD ROBERT J
    • ALVORD ROBERT J
    • G08B21/00
    • G01R31/3278
    • A diagnostic circuit is provided. The diagnostic circuit comprises resistors and a capacitor. The diagnostic circuit is monitored to detect the presence of a load and to confirm the proper operation of a relay circuit. The diagnostic circuit generates an oscillating voltage when the relay circuit is open and the load is connected, generates a logic low when the relay circuit is open and the load is disconnected, and generates a logic high when the relay circuit is closed. The diagnostic circuit can be disposed within a diagnostic circuit system that includes one or more of a sensing circuit, a relay circuit, an alternating-current source having a direct current offset, an input circuit, and a high-voltage microprocessor. The high-voltage microprocessor can be bi-directionally optically coupled to an application microprocessor.
    • 提供诊断电路。 诊断电路包括电阻器和电容器。 监视诊断电路以检测负载的存在并确认继电器电路的正常工作。 当继电器断开并且负载连接时,诊断电路产生振荡电压,当继电器断开并且负载断开时,诊断电路产生逻辑低电平,当继电器闭合时,产生逻辑高电平。 诊断电路可以设置在包括感测电路,继电器电路,具有直流偏移的交流电源,输入电路和高压微处理器中的一个或多个的诊断电路系统中。 高压微处理器可以双向光耦合到应用微处理器。