3HAC025097-001 DSQC639 ABB Power board Robot axis computer board

Description

Through the research on different DCS process alarm hierarchical control technologies, it is found that the DCS devices used in field work at this stage are mainly used to detect and alarm toxic, harmful and combustible gases. When these gases are detected, the alarm will occur. Alarms on the market have diversified characteristics, and standardized alarms should be used to ensure the normal operation of DCS.

The following rules should be noted during the selection of alarms:
● It must be able to provide power supply for monitors and other connecting parts that monitor toxic and harmful gases;
● After detecting toxic and harmful gases, it can send out appropriate alarm signals until someone finds them, greatly improving the effectiveness of the alarm function;
● The range of combustible gas monitoring shall be within the normal explosion range;
● Adapt to the concentration and measurement range of toxic and harmful gases to ensure that the presence of harmful gases can be detected within the normal range;
● Indication alarm equipment is more important, and is the key to determine whether it can alarm correctly. In the process of selection and purchase, alarm equipment with fire protection equipment and interlocking protection functions shall be selected;
● The alarm shall have independent monitoring and alarm functions to ensure that each alarm only monitors toxic and harmful gases within its scope of responsibility;
● The installed alarm shall have the function of continuous alarm. If the leakage of toxic and harmful gases is found during use, the alarm function shall be started. When the concentration is reduced, the alarm shall also give continuous alarm to ensure that the leakage of toxic and harmful gases is found in time.
The alarm is the key to the hierarchical alarm control technology. During the use of the modern DCS process alarm hierarchical control technology, the responsible personnel can select and use the alarm according to the above principles to ensure the safety and standardization of the control site.

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