Is a control relay designed to switch components on and off only when it receives a manual input?

A control relay is designed to automate switching operations, meaning it can control components based on various inputs, not just manual ones. While manual activation is one way to initiate a control relay, it can also be triggered by automatic signals such as those from sensors, timers, or other control circuits. This flexibility allows control relays to be integral in complex systems where automation is required for efficient operation. Therefore, stating that a control relay operates solely based on manual input does not accurately reflect its design and functionality.