Relay signals are electrical impulses that control the opening and closing of a relay switch. A relay consists of an electromagnet, a set of contacts, and a spring. When an electrical signal is applied to the coil of the electromagnet, it generates a magnetic field that pulls the contacts together or pushes them apart, depending on the type of relay. This action allows a low-power circuit to control a high-power circuit or perform other operations in a variety of electrical systems.

    Relay signals serve to transmit information between different parts of a system or between different systems. They are crucial in providing a safe means of controlling high-voltage or high-current circuits with low-power controls, which prevents the direct handling of dangerous electricity.