AOP-1型列车超速保护装置，用于实时监测列车运行速度。当列车速度超出设定限速时，将使列车进入紧急制动状态，从而保证列车运行安全。

本产品提供三种限速模式：正常向前限速模式、正常向后限速模式以及切除限速模式。当列车速度超过设定限速时，该装置将断开所有的超速保护触点，从而导致列车安全环路断开，产生紧急制动并向TMS（Train Monitoring System）报告有超速保护发生；只有当列车运行速度低于设定的零速限值时，所有的超速触点才能重新闭合。

    本系统为双机热备高可靠性装置。整个系统由A、B两组完全独立的控制单元组成，每组单元由电源模块、输入模块、主机模块以及输出模块组成，各模块之间通过总线进行连接。其输入、输出模块均采用光电隔离措施，与外部电路实现完全的电气隔离，从而保证系统安全。

AOP-1 train over speed protection device is used to monitor the train running speed in real time. When the speed of the train exceeds the setting limit speed, the train will enter the emergency braking state, ensuring the safety of the train running.

This product provides three kinds of speed limiting mode: normal forward speed limiting mode, normal backward speed limiting mode, and removal rate speed limiting mode. When the train speed exceeds the setting limit speed, the device will disconnect all over speed protection contacts, causing the train safety loop break off and emergency braking, and report to the TMS (Train Monitoring System) the over speed protection; only when the train speed is less than the setting zero speed limit, all speeding contacts will close again.

The system is a dual machine hot standby high reliability device. The whole system is composed of two groups of completely independent control unit A and B, each unit is composed of power supply module, input module, host module and output module, each module connects through the bus. The input and output module all use the photoelectric isolation measures, realizing complete electrical isolation with the external circuit, and ensuring system security.