Cabinet Requirements; Cabinet Size And Clearance Requirements; Cabinet Airflow Requirements - Juniper SRX 5600 Hardware Manual

SRX 5600 Services Gateway Hardware Guide
Table 22: Site Preparation Checklist (continued)
Item or Task
Measure distance between external power
sources and services gateway installation site.
Calculate the optical power budget and optical
power margin.

Cabinet Requirements

The services gateway can be installed in a standard 482 mm (or larger) enclosed
cabinet. The following sections describe cabinet requirements:

Cabinet Size and Clearance Requirements

The minimum size cabinet that can accommodate the device is 482 mm wide and
800 mm deep. A cabinet larger than the minimum requirement provides better
airflow and reduces the chance of overheating. To accommodate a single device, the
cabinet must be at least 13 U high. If you provide adequate cooling air and airflow
clearance, you can stack five devices in a cabinet that has at least 48 U (84 in. or
2.13 m) of usable vertical space.
The minimum front and rear clearance requirements depend on the mounting
configuration you choose. The minimum total clearance inside the cabinet is 30.7 in.
between the inside of the front door and the inside of the rear door.

Cabinet Airflow Requirements

When you mount the device in a cabinet, you must ensure that ventilation through
the cabinet is sufficient to prevent overheating. Following is a list of requirements
to consider when planning for chassis cooling:
38
Cabinet Requirements
For More Information ...
"Calculating Power Budget for
Fiber-Optic Cable" on page
198,"Calculating Power Margin for
Fiber-Optic Cable" on page 199
Cabinet Size and Clearance Requirements on page 38
Cabinet Airflow Requirements on page 38
Ensure that the cool air supply you provide through the cabinet can adequately
dissipate the thermal output of the device.
Ensure that the cabinet allows the chassis hot exhaust air to exit from the cabinet
without recirculating into the device. An open cabinet (without a top or doors)
that employs hot air exhaust extraction from the top allows the best airflow
through the chassis. If the cabinet contains a top or doors, perforations in these
elements assist with removing the hot air exhaust. For an illustration of chassis
airflow, see Figure 20 on page 32.
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