Install Guide

Rack or cabinet installation
You may either place the switch on a rack shelf or mount the switch directly into a 19" wide, EIA-310- E-compliant rack. Rack
mounting includes four-post, two-post, round threaded holes, or square holes. The ReadyRails system is provided for 1U front-
rack and two-post installations.
The ReadyRails system includes two separately packaged rail assemblies. To begin installation, separate each rail assembly by
sliding the inside rail out of the outside rail.
CAUTION: Your switch is not NEBS Earthquake Z4-compliant if you use the 1U tool-less square-hole or two-post
installation methods.
WARNING: This document is a condensed reference. Read the safety instructions in your Safety, Environmental,
and Regulatory information booklet before you begin.
NOTE: The illustrations in this section are not intended to represent a specific switch.
NOTE: Do not the use the mounted ReadyRails as a shelf or a workplace.
Rack mount safety considerations
● Rack loading—Overloading or uneven loading of racks may result in shelf or rack failure, possibly damaging the equipment
and causing personal injury. Stabilize racks in a permanent location before loading begins. Mount the components starting at
the bottom of the rack, then work to the top. Do not exceed your rack’s load rating.
● Power considerations—Connect only to the power source specified on the unit. When you install multiple electrical
components 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 you install the switch 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 45°C maximum ambient
temperature of the switch.
● Reduced air flow—Do not compromise the amount of airflow required for safe operation of the equipment. Install the
equipment in the rack so that the equipment constantly has the correct amount of airflow surrounding it.
● 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 fan panel facing downward.
ReadyRails Installation
To easily configure your rack for installation of your S4200-ON Series (S4248FB-ON and S4248FBL-ON) switch, use the
ReadyRails rack mounting system provided.
You can install the ReadyRails system using the 1U tool-less square-hole method or one of three possible 1U threaded round-hole
methods—2-post flush mount, 2-post center mount, or 4-post mount.
CAUTION:
Your switch is not NEBS Earthquake Z4-compliant if you use the 1U tool-less square-hole installation
method.
To begin installation, separate each rail assembly by sliding the inside rail out of the outside rail.
NOTE: For more installation instructions, see the installation labels attached to the rail assembly.
20 S4200-ON Series installation