An air cargo loading system also includes a controller, a main control panel and a plurality of PDUs (PDUs), at least the controller and the PDUs being connected by a wired network. Each PDU has a motor, at least one driver roller element coupled to said motor, a light source, a light detector, and a processor. The light detector of each PDU is configured to receive and process an incoming coded light signal from a wireless remote control handset. The PDU's processor determines whether the received coded light signal is a valid command signal and, if so, provides a command information signal to the controller via the wired network. The controller decodes the command information signal and, in view of its knowledge of container locations, various switch settings and other status information, the controller then sends the appropriate control signals to turn, on the required PDUs in response thereto. Because wireless remote handsets are used to communicate with the controller, the air cargo system may either be wholly devoid of local control panels or, have only a very small number of local control panels.