Chapter 1 - Getting Started
Cooling Fan Module
7
Power supply overload protection will shut down the power supply when the
output power rating exceeds 110% to 130% of maximum rated output current.
DC Supply and Ground
The DC supply and ground conductor must meet the following requirements:
■
Suitable conductor material: copper only.
■
Power supply connections through the input connectors; 12AWG:
-48V
-48V Return
Ground to the power supply
■
System ground conductor: 8 AWG.
■
Cable insulation rating: minimum of 75° C, low smoke fume (LSF), flame
retardant.
■
Branch circuit cable insulation color: per applicable national electrical codes.
■
Cable type: UL style 1028, UL 1581(VW-1), IEEE 383 compliant, or IEEE
1202-1991 compliant.
■
Grounding insulation color: green/yellow.
Cooling Fan Module
The cooling system consists of two high-performance (80-CFM) cooling fans
mounted in a single fan module which slides into a bay at the rear of the
enclosure. The design of the fan module provides for an easy-to-install user-
replaceable component in a live environment without interruption of service.
If any one fan should fail, cooling redundancy and efficiency are degraded. The
cooling fans and enclosure temperature are constantly monitored for fault
conditions. In the event of a fault condition the front panel Fan Status LED will
change from a green state to a solid amber state in the case of a fan failure, or to a
blinking amber green state in the case of an over-temperature condition. In both
cases an audible alarm sounds. These notifications are provided to monitoring
software, such as StorView.
WARNING:
Do not operate the enclosure for extended periods of time (greater
than 5 minutes) with the cooling fan module removed.
4700S.book Page 7 Wednesday, April 6, 2005 2:14 PM
