An automation relay is an electrically operated switch that controls circuits automatically based on a predetermined set of inputs. These relays are activated by a control signal, often from a sensor or control system, which then triggers the relay to open or close electrical contacts. The primary function of an automation relay is to perform a specific task in response to the input signal, without requiring constant human supervision. This makes relays highly useful in applications that demand efficiency and precision.

    Components of an Automation Relay

    An automation relay typically consists of three main components： the coil, the contacts, and the casing. The coil is energized when a control signal is applied, creating a magnetic field that activates the relay. This magnetic field pulls or pushes a set of contacts, which either open or close, thereby switching the circuit on or off. The contacts themselves are crucial, as they are the points that handle the actual switching of the electrical circuit. Depending on the design, relays can feature normally open (NO) contacts, which are open when the relay is not energized, or normally closed (NC) contacts, which are closed when the relay is not energized. The casing protects the internal components from environmental factors such as dust and moisture, ensuring the relay remains operational.