Flammable gas alarms and those for toxic and harmful gases should be installed separately from the DCS system; what system should be used and how much will it cost?
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Currently, regulatory requirements from higher-level safety authorities dictate that gas detectors for flammable gases and toxic or harmful gases must be separate from the DCS system; therefore, it is important to find a system that is both cost-effective and time-saving to use. I would appreciate the advice from experts.
For GDS, it’s fine to use 485 communication to connect to the DCS
Just use a domestic DCS; it’s very cheap.
The last edit to this post was made by Look at dusk ^O^ Flowers fall on 2021-9-24 at 14:38. I’m not quite sure what your current situation is; I’ll just share my own experience. In the early stages, the design for alarms involved integrating them into the DCS cabinet, along with interlocks for the fans. After that, we set up a separate gas alarm control cabinet – one cabinet above the existing ones – and installed gas detectors in it. It’s important to use a cabinet equipped with an intelligent LCD display that can store records and allow for time tracking; this feature is essential. Choose a cabinet that is affordable but of decent quality, and make the necessary openings according to the size of the controllers. If you have many sensors on site, opt for a multi-channel model. Then, simply connect the wiring for the toxic gases and the controls for the fans.
It depends on where you are. In areas with strict requirements, such as the Beijing-Tianjin-Hebei region, not only is an independent cabinet required, but the cabinet also needs to be equipped with a touch screen that has storage capabilities, as well as a 485 communication module and an independent host computer. The graphical interface must support storage, alarm functions, trend display, and audio alerts; it should also allow monitoring from both locations, with host computers available in both places
Make corrections strictly in accordance with the standard requirements, complete them in one go, and minimize costs.
Flammable and toxic substances are also referred to as GDS. The new regulations require a separate system for this purpose; you can use the existing DCS system as the GDS. Those who have the means can opt for a SIS, but it must be a separate system. Even the cabinets need to be separate.
There are many domestic second-tier brands in the GDS category; Youwen is likely to be quite cheap