The apper introduces the software and the hardware structure of the TRICON ESD(Emergency Shutdown Device),and expounds the means of safety interlocking mechanism by use of TRICON ESD in FCCU.

• 介绍了TRICON公司紧急停车控制系统ESD(Emergency Shutdown Device)的硬件、软件结构,阐明了利用ESD实现催化裂化装置的自保联锁控制系统的方法。