The Sun SPARC Enterprise T5120 and T5220 servers are available in the following input power configurations:
Two redundant, hot-swappable AC power supplies
Two redundant, DC power supplies
Note - Safety agency requirements prohibit manufacturers from changing a product from AC input to DC input or from DC input to AC input after the product has been removed from the agency approved manufacturing site.
Note - The DC version of the server must be installed in a restricted-access location. According to the intent of the National Electrical Code, a restricted-access location is an area intended for qualified or trained personnel only and has access controlled by a locking mechanism, such as a key lock or an access card system.
When each power supply is connected to a separate power source, the server continues to operating under the following fault conditions:
A power source failure that removes input power from one of the power supplies.
Failure of one of the power supplies.
Service actions which require removal of one of the power supplies.
Refer to the Sun SPARC Enterprise T5120 and T5220 Servers Site Planning Guide for input power specifications.
Note - Input AC/DC power cables: To avoid missing initialization messages, do not attach power cables to the power supplies until you have finished connecting the data cables, and have connected the server to a serial terminal or a terminal emulator (PC or workstation). The server goes into Standby mode and the ILOM service processor initializes as soon as the input power cables are connected to the power source.
Sun SPARC Enterprise T5120 and T5220 Servers Site Planning Guide