In order to further improve the reliability and safety of escalator in functional safety, the latest national standard about escalator requires that escalator safety detection function should be separated from its main control system. 为了进一步提高自动扶梯的功能安全性和可靠性,最新的自动扶梯国家标准要求将自动扶梯安全检测功能与其主控制系统相分离。