What does SLC stand for in alarm systems?

What does SLC stand for in alarm systems?

• A. Signaling Line Circuit
• B. Security Local Circuit
• C. System Logic Channel
• D. Signal Link Controller

Answer: (A)

Signaling Line Circuit is the two‑wire path that runs from the alarm control panel to initiating devices like door/window contacts and other sensors. This circuit supplies power to the devices and carries the signaling data back to the panel. The line is supervised, typically with an end-of-line resistor, so the panel can detect opens, shorts, or tamper on the circuit. This is the standard term you’ll see in alarm system diagrams and manuals, which is why it’s the correct choice. The other phrases aren’t recognized terms for this wiring path in typical alarm language.

Signaling Line Circuit is the two‑wire path that runs from the alarm control panel to initiating devices like door/window contacts and other sensors. This circuit supplies power to the devices and carries the signaling data back to the panel. The line is supervised, typically with an end-of-line resistor, so the panel can detect opens, shorts, or tamper on the circuit. This is the standard term you’ll see in alarm system diagrams and manuals, which is why it’s the correct choice. The other phrases aren’t recognized terms for this wiring path in typical alarm language.