Ptx5000 Cooling System - Juniper PTX5000 Hardware Manual

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PTX5000 Cooling System

IN THIS SECTION

Fan Trays | 32

Airflow | 35

Air Filters | 35

Power Supplies | 38

The PTX5000 cooling system components work together to keep all components within the acceptable

temperature range. 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. 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

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