Cooling System; Figure 20: Airflow Through The Chassis - Juniper SRX 5600 Hardware Manual

SRX 5600 Services Gateway Hardware Guide
Table 21: DC Power Supply LEDs (continued)
Label Color
Green
BRKR ON
Green
Green
INPUT OK
Amber

Cooling System

The cooling system consists of the following components:
The cooling system components work together to keep all services gateway
components within the acceptable temperature range (see Figure 20 on page 32,
Figure 21 on page 33, and Figure 22 on page 33 ). The device has one fan tray and
one air filter that install vertically in the rear of the device. The fan tray contains six
fans.
The air intake to cool the chassis is located on the side of the chassis next to the air
filter. Air is pulled through the chassis toward the fan tray, where it is exhausted out
the side of the system. The air intake to cool the power supplies is located in the
front of the device above the craft interface. The exhaust for the power supplies is
located on the rear bulkhead power supplies.

Figure 20: Airflow Through the Chassis

The host subsystem monitors the temperature of the services gateway components.
When the device is operating normally, the fans function at lower than full speed. If
a fan fails or the ambient temperature rises above a threshold, the speed of the
32
Cooling System
State Description
Off DC power supply circuit breaker is turned off.
On DC power input is present and the DC power supply circuit breaker is turned on.
Off DC input to the PEM is not present.
On DC input is present and is connected in correct polarity.
On DC input is present, but not in valid operating range or connected in reverse
polarity.
Fan tray
Air filter