PTX5000 Cooling System Description
The cooling system components work together to keep all components within the
acceptable temperature range. The host subsystem monitors the temperature of the
components. If the maximum temperature specification is exceeded and the system
cannot be adequately cooled, the Routing Engine shuts down some or all of the hardware
components.
•
Fan Trays on page 18
•
Airflow on page 19
•
Air Filters on page 20
•
Power Supply Cooling System on page 21
Fan Trays
If a fan fails or the temperature rises above the temperature thresholds, the speed of the
remaining fans in the zone is automatically adjusted to keep the temperature within the
acceptable range.
All fan trays are hot-insertable and hot-removable.
The cooling system contains the following fan trays:
•
Cooling zone 0—One vertical fan tray (Fan Tray 0) with fourteen fans cools the following
components installed in the rear card cage: Routing Engines, control boards, and SIBs.
The vertical fan tray is not interchangeable with the horizontal fan trays.
Figure 6: Vertical Fan Tray
g006144
FANTRAY
PTX
VERTICAL
Copyright © 2012, Juniper Networks, Inc.18
PTX5000 Packet Transport Switch Hardware Guide
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