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A fool-proof design on a redundant power supply is disclosed. In one embodiment, the publication describes the details in adding a mechanical key to PSU at different locations for different wattages.
English (United States)
This text was extracted from a PDF file.
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Fool-proof design on redundant power supply
Redundant and different wattages of Common Form Factor (CFF) power supply are supported cross several platform, which reduces power supply development cost and schedule. To maximize PSU efficiency and maximize the accuracy of reading power consumption, mixing wattage is not allowable. In some cases, customer is not convenient to be aware of which wattage of PSU is installed, and may install a different wattage PSU to be redundant PSU. Currently, the mechanism to prevent is using iMM log and error LED to inform customer the PSUs are mismatch. A mechanical key to prevent improper installation could be more efficient.
Adding a mechanical key to PSU, at different locations for different wattages.
See below graph, mechanical Key1 for 500W PSU, Key2 for 600W PSU, the key location is designed for stacked installation of redundant PSUs.
Due to the key location different, 600W PSU is not allowed to be stacked with 500W PSU, which is the Fool-Proof mechanism.
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