be of another type of connector and a balun may be provided to convert between types of video transmission line the video input and output connectors are mounted on a conductive plate 190 and the conductive plate is fastened to the metal chassis with four fasteners 195 though any number of type of fastener my be used in this way if a power surge on one or more of the video connectors destroys a surge protection circuit the field of video connectors and their associated surge protection circuits may be removed from the metal chassis 105 by unfastening the fasteners 195 removing the conductive plate 190 along with the video connectors 110 120 and protection circuits and replacing it with a new conductive plate 190 with new video connectors 110 120 and video protection circuits also shown in this example is a line voltage input 130 in this example a north american standard 120v line cord is shown though in other embodiments this could be a different line input perhaps a dc line input or a different ac voltage frequency or connector additionally there are four female line voltage output connectors 140 and 150 for providing power to a protected device in some embodiments.