Security Door Controls 492-BB Surface-Mount Back Box

Add a surface-mount back box when installing a compatible 492 unit without creating a recessed opening. The Security Door Controls 492-BB provides the enclosure component associated with surface mounting, giving installers a dedicated back-box option for locations where the compatible unit is installed against the mounting surface. Its role is to support the selected mounting configuration for the associated equipment. Use this accessory where site conditions call for the 492 installation to remain surface mounted. This arrangement can be useful at finished mounting locations where a recessed installation is not selected. The back-box format keeps the installation choice focused on the physical mounting method, separating the enclosure accessory from the compatible unit that it supports. It addresses the surface-mount configuration rather than replacing the associated 492 equipment. Compatibility is the key selection point. This item is expressly associated with the 492, so it should be matched to that compatible designation before ordering. The product is a back box, not a substitute for the associated 492 unit. Keeping the accessory and compatible unit distinct helps ensure the requested mounting approach matches the installation requirement and avoids selecting a recessed-mount arrangement where surface mounting is required.