Are the DC power supply modules on the field side and the system side of the control system separated?
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Is it necessary to separate the field side and system side of the DC power supply module in the control system? Are there any regulatory requirements? I hope everyone can share their valuable opinions
I suggest separating them 1. The power supply for the control system mainly comes from the motherboard and the CPU. . On the field side, there are mainly the solenoid coils of the solenoid valves, along with 4-wire instruments. Considering the load distribution, 2. After the signal ground is separated, it can be considered as two DC systems, regardless of whether you ground it or not. Do not skimp on these investments. . .
It is recommended to separate them: in the DCS design, the system cabinet should supply 24V power only to the card isolators, while the terminal cabinet should have an additional 24V power source to supply power to the equipment used on site.