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给出了矿用工控机开关量通道的故障检测方法和可靠性设计方案，对电路构成、工作原理、功能特点进行了描述。分析和实验表明，该故障检测方法能显著改善开关量输出通道的可靠性，且易于工程实现。
The fault detection method and reliability design scheme of switchgear for industrial IPC are given. The circuit structure, working principle and function are described. The analysis and experiment show that the fault detection method can significantly improve the reliability of the switch output channel and is easy to implement.