ESD按钮检测回路设计探讨

Discussion on the Design of ESD Button Monitoring Loop

摘要: 紧急停车(ESD)系统是安全仪表系统中一个重要的子系统，ESD按钮是ESD系统中最常见的人工触发装置，用于人为触发ESD系统的保护程序来缓解事故或危险发生时危害的扩大并减少损失。为了规范ESD按钮的配置，减少误动作的发生，ESD按钮回路需要增加相应回路检测功能，确保不进行误触发。检测回路中的诊断电阻由厂家推荐，诊断电流需要结合ESD机柜实际情况进行配置。

Abstract: Emergency shutdown (ESD) system is an important subsystem of safety instrumented system. ESD button is the most common manual trigger device in ESD system, which is used to trigger the protection program of ESD system artificially to alleviate the expansion of hazard and reduce the loss when accidents or dangers occur. In order to standardize the configuration of ESD button and reduce the error trigger rate, the corresponding loop detection function should be added to the ESD button circuit to ensure no error trigger. The diagnosis resistance in the detection circuit is recommended by the manufacturer, and the diagnosis current needs to be configured according to the actual situation of the ESD cabinet.