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    Cabinet Requirements and Specifications for an EX9208 Switch

    You can mount an EX9208 switch on a cabinet that contains a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association (http://www.eia.org) .

    Cabinet requirements consist of:

    • Cabinet size and clearance
    • Cabinet airflow requirements

    Table 1 summarizes cabinet requirements and specifications for EX9208 switches.

    Table 1: Cabinet Requirements and Specifications for an EX9208 Switch

    Cabinet Requirement

    Guidelines for the EX9208 Switch

    Cabinet size and clearance

    • The minimum cabinet size that can accommodate the switch 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 switch, the cabinet must be at least 13 U high. If you provide adequate cooling air and airflow clearance, you can stack five switches in a cabinet that has at least 48 U (84 in. or 2.13 m) of usable vertical space

      A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association (http://www.eia.org) .

    • 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 switch on a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating. Consider the following requirements list when planning for chassis cooling:

    • Ensure that the cool air supply you provide through the cabinet adequately dissipates the thermal output of the switch (or switches).
    • Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet without recirculating into the switch. 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 Clearance Requirements for Airflow and Hardware Maintenance for an EX9208 Switch.
    • The switch fans exhaust hot air through the right side of the chassis (the left side when you face the front of the chassis, where the fan tray slides in). Install the switch in the cabinet in a way that maximizes the open space on the fan tray side of the chassis. This maximizes the clearance for critical airflow.
    • Route and dress all cables to minimize the blockage of airflow to and from the chassis.
    • Ensure that the spacing of rails and adjacent racks allows for the proper clearance around the switch and rack as specified in Clearance Requirements for Airflow and Hardware Maintenance for an EX9208 Switch.

    Published: 2013-04-02