The MiniMax 3 contains the Door Control Module (DCM) for single door control that can be networked with other MiniMax 3 controllers or Max 3 controllers to expand your system up to a total of 64 doors. The MiniMax 3 backplane not only has the DCM pre-installed, it also contains a power supply for readers as well as for a door strike or magnetic lock (AC or DC). The enclosure dimensions are ideal for applications where the controller is installed at the door (e.g. above the ceiling over the door). LAN/WAN connectivity requires the purchase of LAN/WAN device, part number SEG-1 or SEG-M. Modem connectivity requires the purchase of M3M Modem.