Signal for secondary alarm of flammable toxic gases and interlock with fans
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I have a question for the experts: Is the interlock between the secondary alarm for flammable and toxic gases and the fan implemented directly in the GDS or in the DCS? Is it true that the start/stop signals for the fans are sent to the GDS, while the operation and fault signals are sent to the DCS? Are there any issues with the control points for interlocking the fans as shown in the diagram below? Does the GDS startup fan require the cable shown in the second diagram?
The cable should be from the distribution room to the GDS system cabinet
Normally, the interlock between the combustible and toxic gas alarm system (GDS) and the fan can be achieved through a DCS system. It is a common practice to input the start/stop fan signals into the GDS, while feeding the operation and fault signals into the DCS. This allows the powerful capabilities of DCS to be utilized to handle more complex logic and monitoring requirements. As for the layout of the interlock control points, it is necessary to examine the details in the diagrams you provide to determine whether there are any issues. If the GDS system needs to control the fan directly, then additional cables may indeed be required for connection, in order to ensure proper signal transmission and the reliable operation of the system. Before designing and implementing it, it is recommended to conduct a thorough evaluation and consult professionals to ensure the safety and effectiveness of the system. .