Abstract: An alarm switching matrix, a power distribution unit and a method of operating a power distribution unit are disclosed. In one aspect, an alarm switching matrix for use with multiple types of overcurrent protection devices is provided. In one embodiment, the alarm switching matrix includes: (1) a power circuit coupled to a power input terminal and configured to provide a supply voltage to alarm contact terminals for a circuit breaker and (2) an alarm circuit coupled to an alarm output terminal and a fuse alarm contact terminal that is one of the alarm contact terminals, wherein the alarm circuit is configured to deliver alarm signals to the alarm output terminal from both a circuit breaker connected to the alarm contact terminals and a fuse connected to the fuse alarm contact terminal.

Abstract: A quick release backplane or cover assembly for use with a computer terminal to shield feature card slots of the computer terminal card cage. The assembly comprises a ground strap member releasably secured to the computer terminal card cage with filler members each corresponding with a card slot. Each filler member has one end connected by a severable web to the ground strap and an opposite free end extended outward from the ground strap to cover and shield a corresponding feature card slot. Spring clips affixed to sides of the card cage have spring members corresponding with the filler members for engaging the free end of a corresponding filler member.