The invention discloses an input circuit for signal safety equipment. The input circuit comprises a switching value storage module, an acquisition control module, a first transceiving detection moduleand a second transceiving detection module; wherein the collection control module generates collection pulses, and the first receiving and transmitting detection module and the second receiving and transmitting detection module sequentially transmit pulses with different frequencies. Then the switching value storage module judges the state of the external relay and the fault information of the first transceiving detection module and the second transceiving detection module according to the pulse information read back by the first transceiving detection module and the second transceiving detection module. The circuit is designed in the structure of inherent fault-security circuit, so that misjudgment on a dangerous side cannot be caused by any device fault; wherein an up-and-down symmetrical dual transceiving detection mode is adopted to ensure that function loss or function errors caused by faults of any device can be detected. By adopting a 32-path acquisition pulse round robin sending and 32-path real-time receiving mode, the acquisition function can detect faults caused by internal wire mixing and interference.
本发明公开了一种用于信号安全设备的输入电路,包括开关量存储模块、采集控制模块、第一收发检测模块和第二收发检测模块;采集控制模块产生采集脉冲,第一收发检测模块和第二收发检测模块依次发送频率不同的脉冲,开关量存储模块根据第一收发检测模块和第二收发检测模块回读到脉冲信息的情况判断外部继电器的状态及第一收发检测模块和第二收发检测模块故障信息。设计为内在式故障‑安全电路,任何器件故障都不会导致危险侧的误判发生。采用上下对称式双重收发检测模式,确保任何器件故障导致的功能丢失或功能错误都可被检测。采用32路采集脉冲轮循发送,32路实时接收的方式,采集功能可检测内部混线、干扰产生的故障。
Input circuit for signal security device
一种用于信号安全设备的输入电路
05.02.2021
Patent
Elektronische Ressource
Chinesisch
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