Which device should be located in the same locked room as the alarm panel?

• A. The transformer
• B. A backup battery
• C. A dialer
• D. A monitoring device

Answer: (A)

The panel relies on a robust power source, and the transformer is the device that converts mains voltage to the low voltage that energizes the system. Placing this power- supply component in the same locked room as the alarm panel protects the critical power path from tampering and ensures the system stays powered during a breach. Keeping the transformer with the panel minimizes exposed high‑voltage wiring, reduces the chance of someone cutting power to the system, and simplifies secure installation. The other components, like a backup battery, dialer, or monitoring device, serve important roles but do not directly provide the primary power to the panel, so they aren’t required to be in the same locked room as the panel.