Quantum StorNext QD7000, Installation Manual, Page: 16 / 33

DC Power Installation and AC-to-DC Power Supply Conversion Guide - 3
DC Power Supplies
This document is a supplement for NetApp® storage arrays that can use a DC power source. A DC power source
uses a DC input to supply power to DC-powered power-fan canisters. The DC voltage input is –48-Vdc.
This document provides the following information:
A list of DC power compatible trays
Installing DC power trays
Removing and replacing a failed power-fan canister
The following 2U trays can use a DC power supply.
Product Type Channel Interface
DE1600 drive tray Serial Attached SCSI (SAS)
DE5600 drive tray SAS
E2712 controller-drive tray SAS
E2724 controller-drive tray SAS
E5512 controller-drive tray SAS
E5524 controller-drive tray SAS
Each power-fan canister has one DC power connector. Each tray has two power-fan canisters. Be sure to use a
separate power source for each power-fan canister in the drive tray to maintain power redundancy.
DC Power Source Precautions
WARNING (W14) Risk of bodily injury – A qualified service person is required to make the DC power
connection according to NEC and CEC guidelines.
WARNING (W12) Risk of electrical shock – This unit has more than one power source. To remove all power
from the unit, all DC MAINS must be disconnected by removing all power connectors (item 4 below) from the power
supplies.
CAUTION (C05) Electrical grounding hazard – This equipment is designed to permit the connection of the DC
supply circuit to the earthing conductor at the equipment.
When a tray uses power from a DC power source, you must take into account these precautions:
A two-pole 30-amp circuit breaker is required between the DC power source and each DC power-fan canister.
Before turning off any power switches on a DC-powered tray, you must disconnect all two-pole 30-amp circuit
breakers.
Use a grounding strap to the frame of your cabinet or rack to make sure that there is no voltage build-up on any
exterior surface.