Device for fault detection and alarm of industrial control network switch

The utility model discloses a device for fault detection and alarm of an industrial control network switch. The device comprises a PLC power supply; the processor is connected with the PLC power supply; the digital quantity input module is connected with the processor; wherein a power supply positive electrode and a power supply negative electrode on the industrial control network switch are connected with a power supply, a first power supply dry contact and a second power supply dry contact are connected with corresponding interfaces on the digital quantity input module, and a first optical signal LS dry contact and a second optical signal LS dry contact are connected with corresponding interfaces on the digital quantity input module. And the first optical signal DA dry contact and the second optical signal DA dry contact are connected with corresponding interfaces on the digital quantity input module. 本实用新型公开了一种用于工控网络交换机故障检测与报警的装置，该装置包括：PLC电源；处理器，与PLC电源连接；数字量输入模块，与处理器连接；其中，工控网络交换机上的电源正极和电源负极与电源连接，第一电源干接点和第二