The KJ761-F2 intrinsically safe base station for mines is an electronic device for the attendance and positioning of underground personnel in coal mines. It can be used with positioning terminals to receive and store wireless messages of identification cards and transmit them to the ground through TCP/IP networks. The KJ761-F2 intrinsically safe base station for mines is powered by an intrinsically safe power supply. It is able to continue working for more than 4h in case of underground power failure.