The design approach employed by IFS for equipment mounted within the model R3 Chassis Rack Unit with Integral 115/230 V AC Power Supply, provides for the elimination of a single-point failure in the event of a major fault within any module located with in the chassis rack. This is accomplished through the use of automatic electronic current limiting within each rack-mountable module, rather than to provide the current limiting within the power supply unit which supports the power requirements for equ ipment located within the rack. In nearly all competing designs, a major fault within a module, located within the chassis rack, results in the power supply unit going into a current limiting condition, and as a result, all of the modules located withi n the rack shut down. The R3 Rack design employed by IFS eliminates this possibility, as only the faulty module shuts down, and the operation of the other devices within the rack continues unimpaired. This automatic current limiting feature is also sel f-resetting, should the fault or overload be of a temporary or intermittent condition. Furthermore, all modules located within the chassis rack are hot-swappable, so that it is not necessary to power-down the rack when removing or replacing modules.
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