Fan Module - Alcatel-Lucent 7705 Installation Manual

7705 SAR-8 Components
Refer to
preparing DC power cables.
Note: For sites that operate using +24VDC supplies, a +24VDC to -48VDC converter is
needed to provide power to the 7705 SAR-8.

Fan Module

Figure 9
alarm indicators (LEDs), an external alarm I/O connector, and an Audible Alarm
Cutoff/Lamp Test (ACO/LT) pushbutton.
The Fan module is hot-swappable and field-replaceable by qualified personnel. It must
always be installed and fully operational while the 7705 SAR-8 is powered up. During
routine maintenance and Fan module replacement, the system can operate safely for up to
four minutes.
Fan Operation
The Fan module houses eight fans. Air enters from the intake vent on the right side of the
chassis and exits through the exhaust vent on the left side. The fans have one operating speed
(full speed) and are always operational, regardless of ambient temperature.
Page 44
DC Power Connections on page 77
shows the Fan module. The Fan module provides cooling for the system, as well as
for requirements and information regarding
Figure 9: Fan Module
7705 SAR-8
Alarms
FAN Critical
Batt A Major
Batt B Minor
ACO/LT
External
Alarms
FAN
7705 SAR-8 Installation Guide
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