Distributed Supervisory Protection Interlock System

The Distributed Supervisory Protection Interlock System, DSPI. is under development at the Stanford Linear Accelerator Center for requirements in the areas of personnel protection, beam containment and equipment protection interlocks. The DSPI system [ lj, distributedover the application site, consists of segments with microprocessor-based controller and I/O modules, local area networks for communication, and a global supervisor computer. Segments are implemented with commercially available controller and T/O modules arranged in local interlock clusters, and associated software. Segments provide local interlockdata acquisition, processing and control. Local area networks provide the communication backbone between segments and a global supervisor processor. The supervisor processor monitors theoverall system, reportsdetail status andprovides human interfaces.