Air Filters; Power Supply Cooling System; Figure 48: Quiet Upper Front Fan Tray; Figure 49: Quiet Lower Front Fan Tray - Juniper T640 Hardware Manual

Air Filters

Power Supply Cooling System

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Copyright © 2013, Juniper Networks, Inc.
NOTE: The quiet upper front fan tray and quiet lower front fan tray are
not interchangeable with each other. In addition to the labels, the quiet
upper fan tray also has an upward pointing arrow above the four fan
icons on the faceplate.
The quiet upper front fan tray is labeled
Figure 48 on page 77).

Figure 48: Quiet Upper Front Fan Tray

FAN-T-FTOP-S
UPPER FANTRAY
The quiet lower front fan tray is labeled
Figure 49 on page 77).

Figure 49: Quiet Lower Front Fan Tray

FAN-T-FBOT-S
LOWER FANTRAY
All fan trays are hot-insertable and hot-removable.
The cooling system contains a front air filter and a rear air filter. All air filters are
hot-insertable and hot-removable.
The power supply cooling system consists of the following:
Each DC power supply contains one fan that cools that power supply.
Each AC power supply contains two fans that cool that power supply.
T640 Hardware Component Overview on page 11
Maintaining the T640 Air Filters on page 180
Maintaining the T640 Fan Trays on page 181
Chapter 3: T640 Router Hardware Component Overview
and
FAN-T-FTOP-S UPPER FANTRAY
and
FAN-T-FBOT-S LOWER FANTRAY
(see
(see
77