Locomotive signal system

The invention provides a locomotive signal system which comprises a vehicle-mounted direct current power source, a vehicle-mounted antenna, a vehicle-mounted signal machine, a power source panel equipped with a power source module, and a mainboard equipped with a mainboard CPU and an in-series relay set, wherein a drive circuit controls switching-on and switching-off of a safety switch according to control signals of the mainboard CPU; and switching-on or switching-off of the safety switch controls the in-series relay set to stay at a power-on working state of a power-off state. The locomotive signal system provided by the invention can switch off all lamp positions of a signal machine when the locomotive signal system has faults and can inform a driver that the locomotive signal system has failed. In this way, hidden safety dangers caused by the faults of the locomotive signal system can be eliminated. 本发明种机车信号系统，包括车载直流电源，车载天线，车载信号机，安装有电源模块的电源板，安装主机板CPU及串联继电器组的主机板。驱动电路根据主机板CPU的控制信号控制安全开关通断；安全开关的导通或断开控制串联继电器组