What is the initial step when installing the memory card in the First Defender RMX?

• A. Shut down detector and open access door on the bottom side of the detector
• B. Power on the detector and open the front panel
• C. Remove the memory card and reinsert while powered
• D. Connect USB cable to memory card

Answer: (A)

Powering down before handling internal components is essential to protect both the device and the data. The initial step is to shut down the detector and open the access door on the bottom side, which gives safe, unobstructed access to the memory card slot. When the unit is off, you reduce the risk of short circuits, electrical shock, or data corruption as you insert the card. Opening a door on the bottom aligns with how this model houses the memory slot and keeps the card insertion area protected during operation. In contrast, powering the unit on while accessing a panel can expose live circuitry; removing or reinserting a card while the device is powered also risks damaging the card or the socket, and using a USB connection isn’t the method for installing the memory card on this device.