Ptx5000 Cooling System Description; Fan Trays; Figure 6: Vertical Fan Tray - Juniper PTX Series Hardware Manual

PTX5000 Packet Transport Switch Hardware Guide

PTX5000 Cooling System Description

18
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 (
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

FAN TRA
PTX Y
VER TIC
AL
) with fourteen fans cools the following
Fan Tray 0
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