Title :
Self-checking safety interlock system
Author :
Zodeh, A.M. ; Sikora, D.S.
Author_Institution :
E.I. du Pont de Nemours & Co., LaPlace, LA, USA
Abstract :
A more reliable electrical self-checking interlock system is discussed that meets the desired goals of safety shutdown systems. The design, operating principles, and performance characteristics of the microprocessor-based, self-checking, safety interlock system are described. The system was designed and implemented in a large plant. The system has substantially improved safety and environmental control of the processes, in addition to its inherent advantages of process analysis and optimization over conventional systems. With some modification the system can be programmed to verify functionality of the final interlock elements for additional safety improvement
Keywords :
electrical engineering computing; microcomputer applications; safety systems; electrical self-checking interlock system; microprocessor-based safety system; safety shutdown systems; Chemical industry; Control systems; Electric variables control; Explosions; Fires; Inspection; Monitoring; Petroleum; Safety; Switches;
Conference_Titel :
Petroleum and Chemical Industry Conference, 1988, Record of Conference Papers., Industrial Applications Society 35th Annual
Conference_Location :
Dallas, TX
DOI :
10.1109/PCICON.1988.22414
