Sun Microsystems StorEdge S1 AC100, Installation And Maintenance Manual

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84 StorEdge S1 AC100 and DC100 Installation and Maintenance Manual • March 2002
Ensure that all methods of disconnecting the power remain accessible after
installation.
Caution –
External filtering and surge suppression devices might be required on
the power feeds where branch circuit electromagnetic characteristics are unknown.
DC Source Power Requirements
DC power must be:
■
Electrically isolated from any AC source
■
Reliably connected to earth (the battery room positive bus is connected to ground)
■
Capable of providing up to 200 watts of continuous power per feed pair
Note –
The DC version of the StorEdge S1 storage enclosure must be installed in a
restricted access location. Per 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 some sort of locking mechanism, such as a key lock or an access
card system.
Overcurrent Protection Requirements
Note – Overcurrent protection devices must meet applicable national and local
electrical safety codes and be approved for the intended application.
■
Overcurrent protection devices must be provided as part of each host equipment
rack.
TABLE A-3
DC Power Requirements
Electrical Element Requirement
Voltage -48 VDC
Input current < 4.0 amps @ -40 VDC (150 W)
Max. input surge current • 20 amps peak on a cold start (after AC has been off for more
than 200 ms)
• 100 amps peak on a warm start (after AC has been off for
less than 200 ms)