Do all PLC analog input channels require a safety isolation barrier? Will it have no impact if not done? (Grounding is proper)
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Do all PLC analog input channels require a safety isolation barrier? Is it okay without any impact (with proper grounding)? Are there any regulations regarding this? In which cases can it be omitted, and in which cases must it be included?
“The “safety isolation barrier”, abbreviated as “Safety Barrier”, is commonly referred to as a \"safety gate\" in the petrochemical industry. Some field devices such as instruments or valve positioners operate in environments where flammable and explosive gases may be present; the safety barrier is used to limit the energy of electrical signals coming from the control system, thereby preventing explosions in the event of short circuits or similar situations； If it is merely an \"isolator,\" it only serves to isolate and reduce interference between incoming and outgoing signals.