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标题: Understanding Relay Signals: Key Components and Applications

Relay signals play a crucial role in modern electrical and electronic systems. They act as a medium that allows for the control of high-power circuits using low-power control signals, making them essential in a variety of industries, including automation, communications, and electrical protection systems. In this article, we will explore what relay signals are, how they work, and the various applications where they are employed. What are Relay Signals? A relay is an electrically operated switch that uses an electromagnet to open or close a set of contacts. Relay signals refer to the electrical signals that are transmitted through the relay when it is activated. These signals can either be input or output, depending on whether the relay is being controlled or is controlling an external device.