Srx1400 Services Gateway Cooling System - Juniper SRX1400 Hardware Manual

SRX1400 Services Gateway Cooling System

Copyright © 2011, Juniper Networks, Inc.
The cooling system consists of a fan tray containing two fans. These fans keep all services
gateway components within the acceptable temperature range.
The SRX1400 Services Gateway also includes an air filter that protects the device from
dust entering into the system.
The SRX1400 Services Gateway has one fan tray located in the side of the chassis and
can be plugged in from the rear of the chassis.
From the front of the chassis, there is a single air intake on the left side of the services
gateway. Air is pushed from the fan tray through the air filter and then to the card cage.
The air is exhausted out the right of the system.
Figure 15 on page 37 SRX1400 Services Gateway fan tray.
Figure 15: SRX1400 Services Gateway Fan Tray
The Routing Engine monitors the temperature of the device components. Above an
ambient temperature of 30° C to 35° C, the fans operate at full speed. Below 30° C, the
fans operate at a reduced speed. If a fan fails or the ambient temperature rises above a
threshold, the speed of the other fan is automatically adjusted to keep the temperature
within the acceptable range. If the ambient maximum temperature specification is
exceeded and the system cannot be adequately cooled, the Routing Engine shuts down
the system by disabling output power from each power supply.
The fan tray includes a single LED, which can be used to monitor the fan speed. The fan
tray LED indications can be used to detect the condition when the fan-speed has reduced
to a safer value, so that fan tray can be removed from the device safely. This LED is
controlled by the Routing Engine. The fan tray LED is located on the fan tray, which is
visible only when the fan tray door is opened.
The fan-tray faceplate has a single LED to indicate the status of the fans and fan tray
(see Table 28 on page 38).
Chapter 2: SRX1400 Services Gateway Hardware Components
37