Specifications
Installing the S4820T | 23
Installing Rack or Cabinet Hardware
You may either place the switch on the rack shelf or mount the switch directly into a 19" wide, EIA-310-
E- compliant rack (four-post, two-post, or threaded methods). The Dell ReadyRails™ system is provided
for one 1U front-rack, and two-post installations. The ReadyRails system includes two separately
packaged rail assemblies and two rails that are shipped attached to the sides of the switch.
WARNING: This is a condensed reference. Read the safety instructions in your Safety, Environmental, and
Regulatory information booklet before you begin.
NOTE: The illustrations in this document are not intended to represent a specific switch.
Rack Mounting Safety Considerations
• Rack loading—Overloading or uneven loading of racks may result in shelf or rack failure, causing
damage to the equipment and possible personal injury. Stabilize racks in a permanent location before
loading begins. Mount the components beginning at the bottom of the rack, then work to the top. Do not
exceed your rack load rating.
• Power considerations—Connect only to the power source specified on the unit. When multiple
electrical components are installed in a rack, ensure that the total component power ratings do not
exceed the circuit capabilities. Overloaded power sources and extension cords present fire and shock
hazards.
• Elevated ambient temperature—If installed in a closed rack assembly, the operating temperature of the
rack environment may be greater than the room ambient temperature. Use care not to exceed the 40
°
C
maximum ambient temperature of the switch.
• Reduced air flow—Install the equipment in the rack so that the amount of airflow required for safe
operation of the equipment is not compromised.
• Reliable earthing—Maintain reliable earthing of rack-mounted equipment. Pay particular attention to
the supply connections other than the direct connections to the branch circuit, for example: use of power
strips.
• Do not mount the equipment with the rear panel facing in the downward position.