which power supply is needed

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PS861, PS9, PS873, PS505, PS510, PS515, PS902, PS904, PS906, PS914 (871-2, 873-AL, 873-AO,873-SI, 873-4TD, 873-AC, 873-DE, 900-4R, 900-4RL, 900-8F, 900-FA, 900-BB, 900-2RS, 900-BBK)