Cabinet Requirements and Specifications for an EX 8200 series
Switch
You can mount an EX 8200 series 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 EX
8200 series switches.
Table 1: Cabinet Requirements and Specifications for an EX 8200 series
Switch
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Cabinet Requirement
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Guidelines
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Cabinet size and clearance
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- The minimum cabinet size for accommodating an EX 8208
switch is 23.62 in. (60 cm) wide and 30.0 in. (76.2 cm) deep. Large
cabinets improve airflow and reduce the chance of overheating. To
accommodate a single EX 8208 switch in a four-post rack, the cabinet
must be at least 14 U high (or 15 U if you install the power cord
tray, which is optional for the four-post rack). To accommodate a
single EX 8208 switch in a two-post rack, the cabinet must be at least
15 U high.
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).
- With adequate cooling air and airflow clearance, you can
stack three EX 8208 switches in a cabinet with a four-post rack that
has at least 42 U of usable vertical space. (45 U are required if
you install the optional power cord tray.) You can stack three EX
8208 switches in a cabinet with a two-post rack that
has at least 45 U of usable vertical space (for two-post rack installations,
installing the power cord tray is mandatory). In all cases, the rack
must meet the strength requirements to support the weight.
- The minimum total clearance inside the cabinet is 29.2
in. (74.17 cm) between the inside of the front door and the inside
of the rear door.
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Cabinet airflow requirements
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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 EX 8208 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 EX 8208 Switch.
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