Abstract: Zhongguan Iron Mine completes the closed-loop reception of remote signals by laying switched Ethernet network signals in the underground electric locomotive transportation link，installing sig⁃ nal I/O base station signal box，Ethernet switch，positioning label，etc. At the same time，PLC editable controller，S71214 C CPU and precise positioning device are added to the electric locomotive body control system to realize the functional communication and identification of electric locomotive and Ethernet net⁃ work signals. Finally，the technical transformation of automatic remote control of electric locomotive is com⁃ pleted. The project realizes the whole process remote control operation of remote automatic transportation， remote loading and remote unloading of electric locomotive in Zhongguan Iron Mine.

Key words: remote control, ethernet, PLC controller, electric locomotive unmanned driving