On the basis of introducing application of distributed control system in chemical technology,the paper emphasisly discusses software and hardware of communication power supply based on single-Chip 89C52 and presents idea of system reliability.

• 本文在介绍集散控制系统在化工技术中的应用基础上,重点讨论了单片机89C52控制的数据采集站通信电源系统控制器的软硬件设计,以及系统可靠性设计的思想。