1results about How to "Solve burnt" patented technology

The invention provides a communication device and a communication method, the communication device comprises a positive input end, a negative input end, a pre-stage circuit device and a post-stage circuit device, one end of the post-stage circuit device is connected with an output end of the pre-stage circuit device, and the other end of the post-stage circuit device is connected with the negative input end. The preceding-stage circuit device comprises a controller and a switching device, the positive input end is connected with the first end of the switching device, the second end of the switching device is connected with the controller, the third end of the switching device is connected with a ground wire, and the controller is used for detecting the voltage difference between the first end and the third end of the switching device; and controlling the switch-on or switch-off of the switching device according to the voltage difference. Based on the above technical problem, the problem of short circuit to ground caused by reverse connection between the RTN of the power distribution system and the-48V of the communication device can be solved, and the problem of carbonization or burning of parts such as a single board, a cable and a device caused by short circuit to ground is further avoided.