What is the primary purpose of an end-of-line device in conventional circuits?

The primary purpose of an end-of-line device in conventional circuits is to protect or supervise the integrity of the circuit. In alarm systems, for example, end-of-line devices are installed at the termination points of the circuit, allowing the system to monitor for any tampering, shorts, or breaks in the wiring. This monitoring capability ensures that the circuit remains functional and can trigger an alert or alarm if any issues are detected, thereby maintaining the overall security and reliability of the system.

While other options may serve different roles in a circuit, such as providing power, connecting devices, or enhancing signal strength, these functions do not directly relate to the primary purpose of an end-of-line device. The focus of the device is on maintaining circuit integrity and ensuring that the system functions as intended.