水泥厂DCS系统Com电源短路故障及解决措施  

Com Power Supply Short Circuit Fault and Solution in Cement Factory DCS System

作　　者：邹政 ZOU Zheng(China Gezhouba Group Cement Co.,Ltd.,Wuhan Hubei 430073,China)

机构地区：[1]中国葛洲坝集团水泥有限公司,湖北武汉430073

出　　处：《水泥技术》2025年第1期25-30,共6页Cement Technology

摘　　要：DCS系统对水泥生产线的连续稳定运行起着重要作用,其中Com电源为数字量信号输入提供公共端电压,是确保DCS系统正常运作不可或缺的组件。Com电源短路故障是一种典型的DCS现场电气回路故障,多由现场输入的数字量信号回路对地短路引起,易导致DCS控制柜内Com电源保险熔断,进而造成数字量输入信号丢失。分析了速度开关与跑偏开关、限位开关以及直流电源导致的Com电源短路故障案例,通过采取禁止DCS系统Com电源直接通向生产现场、配置合适额定电流的断路器和增加隔离继电器等措施,有效实现了DCS控制柜内Com电源与生产现场的隔离,降低了DCS系统Com电源短路故障对水泥生产造成的影响,消除了故障隐患,提高了生产线运行的稳定性和连续性,为水泥生产的高效运营提供了坚实保障。The DCS system plays an important role in the continuous and stable operation of the cement production line,in which the Com power supply provides a common voltage for the digital signal input and is an indispensable component to ensure the normal operation of the DCS system.Com power short circuit failure is a typical DCS field electrical circuit failure,which is mostly caused by the short circuit of the digital signal circuit input on site to the ground,which can easily cause the Com power fuse in the DCS control cabinet to blow,thereby causing the digital input signal to be lost.This paper analyzes the Com power short circuit failure cases caused by speed switches,deviation switches,limit switches and DC power supplies,by prohibiting the DCS system Com power supply from directly connecting to the production site,configuring a circuit breaker with a suitable rated current and adding an isolation relay,the Com power supply in the DCS control cabinet is effectively isolated from the production site,reducing the impact of the DCS system Com power short circuit failure on cement production,eliminating the hidden dangers of failures,improving the stability and continuity of the production line operation,and providing a solid guarantee for the efficient operation of cement production.

关 键 词：DCS系统 Com电源短路故障 速度与跑偏开关 断路器 隔离继电器 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]