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Safety barriers are commonly found in intrinsically safe systems. First, let’s introduce some electrical knowledge: intrinsic safety is a type of explosion-proof technology for systems, which involves using design measures to ensure that the production equipment or production system itself is safe, so that no accidents occur even in case of misoperation or failures. The safety barrier is the most commonly used associated device in intrinsically safe explosion-proof systems. A safety barrier is a circuit that limits energy between the field devices and the control room, as shown in the figure below. It has two basic functions: first, to enable intrinsically safe devices in hazardous areas to function properly; second, to limit the electrical power supplied from the control room to the field instruments to such a level that neither sparks capable of igniting hazardous gases nor surface temperatures high enough to cause ignition can be generated. Even if there is a malfunction in the intrinsically safe devices themselves, as long as the current-limiting and voltage-limiting circuits of the safety barrier are functioning properly, no sparks or surface temperatures that could ignite an explosive environment will be produced. Therefore, whether there is a failure in the control room equipment in safe areas or in the intrinsically safe equipment in hazardous areas, the entire system remains in an inherently safe electrical state and no explosion will occur. EMY (Wuhan) System Engineering Co., Ltd. is located in the Zhongnan Road business district of Wuhan, a city that serves as a transportation hub for nine provinces. It is a high-tech enterprise specialized in the sales of industrial control products as well as providing system engineering-related services. It is an automated specialty subcontractor and contractor for engineering design institutes and general contractors, as well as a professional service provider for installation, commissioning, operation, and after-sales support.