Either one or two RPS6U rack power supplies can be installed in a ABE04x system rack. A rack with one RPS6U power supply (330 W version) supports the power requirements for a full rack of modules (cards) in applications with operating temperatures up to 50°C (122°F).

Alternatively, a rack can have two RPS6U power supplies installed in order to either support rack power supply redundancy or in order to supply power to the modules (cards) non-redundantly over a wider range of environmental conditions.

ABE04x system rack with two RPS6U power supplies installed can operate redundantly (that is, with rack power supply redundancy) for a full rack of modules (cards). This means that if one RPS6U fails, the other will provide 100% of the rack’s power requirement so that the rack will continue to operate, thereby increasing the availability of the machinery monitoring system. 

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RPS6U rack power supplies 200-582-300-013 Datasheet