What device is used to terminate a supervised circuit?

What device is used to terminate a supervised circuit?

• A. End of line device
• B. Junction box
• C. Splice connector
• D. Inline controller

Answer: (A)

In a supervised fire alarm circuit, the panel must continuously verify that the wiring from the last device back to the control panel is intact. To achieve this, an end-of-line device is placed at the far end of the circuit. This device establishes a defined electrical condition (often a specific resistance or signaling state) that the control panel expects during normal operation. If the circuit becomes open, shorted, or tampered with, that condition changes and the panel flags a trouble or alarm, indicating a fault on the supervised circuit. The other items don’t provide this monitoring function: a junction box merely houses connections, a splice connector simply joins wires, and an inline controller isn’t used to terminate a supervised circuit.

In a supervised fire alarm circuit, the panel must continuously verify that the wiring from the last device back to the control panel is intact. To achieve this, an end-of-line device is placed at the far end of the circuit. This device establishes a defined electrical condition (often a specific resistance or signaling state) that the control panel expects during normal operation. If the circuit becomes open, shorted, or tampered with, that condition changes and the panel flags a trouble or alarm, indicating a fault on the supervised circuit. The other items don’t provide this monitoring function: a junction box merely houses connections, a splice connector simply joins wires, and an inline controller isn’t used to terminate a supervised circuit.