用可编程电子系统(PES)设计安全联锁系统

Safety interlock system design using programmable electronic system (PES)

本文分析了在用可编程电子系统(PES)设计过程工业的安全联锁系统时应考虑的主要因素,指出了提高PES的可用度和安全性的一般方法,对PES的结构与可靠性引用美国HIL-HBDK-217E提供的有关可靠性的数据,结合一个简单的例子,给出了PES不同结构的PFSavg(故障安全概率)和PEDavg(故障危险概率)的基本数据,对用PES设计安全联锁系统有一定的参考价值。

: The paper analyses the main factors considered in design of process industry safety interlock system by using PES, some general methods are provided to improve availability and safety. Some relevant reliability data of HIL- HBDK - 217E(USA) are introduced for reliability of different structure PES. Combining a simple example, PFSavg and PFDavg basic data are given for different structure PES. It's a valuable reference for safety interlock system design by using PES.