Abstract: 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.
邹政. 水泥厂DCS系统Com电源短路故障及解决措施[J]. 水泥技术, 2025, 1(1): 25-30.
ZOU Zheng. Com Power Supply Short Circuit Fault and Solution in Cement Factory DCS System. Cement Technology, 2025, 1(1): 25-30.
