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91
CHAPTER
B
Using DC Power
This appendix describes using the DC Power Unit for the Sun StorageTek 2500 Series
Arrays in the following sections:
■ “DC Power Overview” on page 91
■ “Installation Notes for DC Power” on page 92
■ “Ship Kit Changes” on page 93
■ “DC Power LEDS” on page 93
■ “Connecting Power Cables” on page 94
■ “Turning Off the DC Power During an Emergency” on page 96
■ “Relocation Cautions” on page 96
DC Power Overview
The Sun StorageTek 2500 Series Arrays can be ordered with a DC power connection
and connector cables.
Caution – A qualified service person is required to make the DC power connection
per NEC and CEC guidelines. A two-pole 20-amp circuit breaker is required
between the DC power source and the array module for over-current and short-
circuit protection. Before turning off any power switches on a DC-powered module,
you must disconnect the two-pole 20-amp circuit breaker.
Caution – Electrical grounding hazard – This equipment is designed to permit the
connection of the D.C. supply circuit to the earthing conductor at the equipment.