Flammable and toxic gas alarm

As can be seen from the diagram, GDS is only used for alarms and not for interlocking valves, pumps, etc. The relevant standards clearly specify the requirements regarding the installation of flammable and toxic gases as well as alarm systems.

Wow, impressive – being able to have a second image. Your question is too broad.

According to Document No. 116 issued by the General Administration of Work Safety in 2014, the alarm system must be separate and cannot be integrated with DCS/PLC

I. From the perspective of system configuration: 1. When there are a large number of flammable and toxic gas detectors, it is common to integrate them into a GDS system; for example, in chemical processing plants, such detectors are connected to an independent GDS； 2. If the number is small, such as in a canteen’s gas cylinder room where there are only a few cylinders, a combustible and toxic gas alarm controller can be designed. 3. If combustible and toxic gas detectors are used as safety interlocks, they become part of the Safety Instrumented System. II. In terms of system functionality, combustible and toxic gas detectors can provide protection against leaks and ensure personal safety; in other words, they function as GDS systems in the conventional sense ； Interlock protection for plant safety is implemented through the SIS system; for example, the EVA plant monitors for combustible gases in the reaction tank, and the reaction is halted when high concentrations are detected to prevent fires and explosions ； Fire linkage: The GDS controller can be connected to the fire alarm control system. Figure 2 shows the above three functions, but GDS systems generally do not share switches with fire control systems. The three methods are relatively independent.

The system cabinet has no direct connection to the controller. The controller is used to control those downstream cards and communication cards, and it does not have the function of making direct connections. Except for PLC

I don’t think this is right. Many factories have GDS cabinets and controllers; this diagram shows that controllers are used for interlocking purposes. Does that mean that if a company doesn’t have a gas interlocking system, then the GDS isn’t needed? ? ?

I don’t think this is right. Many factories have GDS cabinets and controllers; this diagram shows that controllers are used for interlocking purposes. Does that mean that if a company doesn’t have a gas interlocking system, then the GDS isn’t needed? ? ? I mainly want to know this

Hello, from what I can see in this diagram, it doesn’t seem right. Many factories have GDS cabinets and controllers; this diagram indicates that controllers are used for interlocking purposes. Does that mean that if a company doesn’t have a gas interlocking system, then the GDS is not needed? ? ?

I know that. But the diagram shows that a controller is used for chain control; so does that mean that if a company doesn’t have a gas chain system, then GDS is not needed? ? ? For example, in the case of gas detection in a workshop only, if a controller is connected, how should GDS be connected?

I don’t think this is right. Many factories have GDS cabinets and controllers; this diagram shows that controllers are used for interlocking purposes. Does that mean that if a company doesn’t have a gas interlocking system, then the GDS isn’t needed? ? ? For example, gas detectors all have interlocks connected to the controller; how can the GDS still be connected?